Journal articles: 'Coal mine wastewater'

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Naswir, Muhammad, and Ria Purnama Sari. "Managing an Environmentally-Friendly Coal Mining Wastewater Processing." Journal of Innovation and Technology 1, no. 1 (March 17, 2020): 41–49. http://dx.doi.org/10.31629/jit.v1i1.2136.

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Jambi is one of the provinces in Indonesia that has an abundance coal potential. One of the companies that holds the Mining-Business License (IUP) for Coal mining production and operations is PT. XYZ, which is chosen to be the source of samples for this research. One of the negative impacts caused by coal mining activities is the wastewater emerge from both mining and stockpile activities. Unprocessed wastewater can pollute the environment, particularly the surface water and ground water around the mining site. Materials utilized in managing coal mine wastewater in this research are bentonite (natural and activated) and limestone from clamshells. Bentonite is expected to be able to absorb TSS, Fe, Mn and Hg values, while clamshells to increase the pH value in coal mine wastewater. This research aims to determine the ability of clamshell bentonite and limestone in processing coal mine wastewater. The samples in this research are amounted to 19 consisting of 1 control sample and 18 treatment samples. The treatments are made in 6 mass variations and 3 variations of contact time. A combination of 1 gram of material is contacted with 250 ml of coal mine wastewater. The characteristics of coal mine wastewater from PT. XYZ based on the samples taken are as follows: pH 4,40, TSS 66 mg/l, Fe 0,998 mg/l, Mn 7,340 mg/l, dan Hg 0,00076 mg/l. The results of this research show that the compilation of bentonite and limestone from clamshells is able to reduce the parameters of coal mine wastewater. The absorption efficiency of the compilation of bentonite and limestone in decreasing the parameters of coal mine wastewater has varied values with the average of: pH 68,62%, TSS 90,91%, Fe 97,60%, Mn 26,71%, and Hg 96,05%. Mass variations and contact time influence the decrease in coal mine wastewater parameters. The treatment on variations of 0.75 grams of activated clamshell bentonite and 0.25 grams of clamshell limestone with 30 minutes contact time is the treatment that produces wastewater that meets the environmental quality standards, which are pH 7,16 from 6 – 9 of environmental quality standards value, TSS 6 mg/l from 400 mg/l of environmental quality standards value, Fe < 0,02 mg/l from 7 mg/l of environmental quality standards value, and Hg < 0,00003 mg/l from 0,002 mg/l of environmental quality standards value. With good management, it is expected that the impacts caused by waste water from coal mining can be minimized in order to achieve environmentally friendly mining activities

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Maiti, Deblina, Iqbal Ansari, Mohd Ashraf Rather, and Arukula Deepa. "Comprehensive review on wastewater discharged from the coal-related industries – characteristics and treatment strategies." Water Science and Technology 79, no. 11 (June 1, 2019): 2023–35. http://dx.doi.org/10.2166/wst.2019.195.

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Abstract Wastewaters discharged from various coal-related activities deteriorate fresh water quality and inflict possibilities of groundwater contamination. Their characteristics mostly depend on the parent coal properties, though some of the pollutants are cyanide, thiocyanate, ammonia, phenol, heavy metals and suspended solids. This paper has reviewed the treatment techniques along with the characteristics of all such kinds of wastewater and also identified the challenges and future perspectives. Primarily, demineralization of coal can attenuate and control release of pollutants in wastewaters if implemented successfully. Mine water from non-lignite mines can be purified using simple techniques, for its reutilization. Acidic mine water and leachates can be treated using passive bioreactors with microbial activity, different organic substrates and limestone drains. Additionally bio-electrochemical systems, membranes, macrocapsules, zeolite filters, ores, physical barriers, and aquatic plants can also be used at various stages. Coal washery wastewater can be treated using natural coagulants obtained from plant extracts along with conventional coagulants. Nitrification and denitrification bacteria fixed in reactors along with activated carbon and zero-valent iron can treat coke oven wastewater. Some other sophisticated techniques are vacuum distillation, super critical oxidation, nanofiltration and reverse osmosis. Practical use of these methods, wisely in an integrated way, can reduce freshwater consumption.

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Faisal, Ahmad, and Syarifudin A. "Dosis Optimum Larutan Kapur untuk Netralisasi pH Air Limbah Penambangan Batubara." JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan 11, no. 1 (January 1, 2014): 184. http://dx.doi.org/10.31964/jkl.v11i1.10.

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Abstrak: Optimum Dose of Hydrated Lime for pH Neutralizing in Coal Mine Waste-water. Coal mines release chemicals such as pyrite (Fe2S), produce acid waste water (H2SO4). This research aims to know the optimum dose of hydrated lime to neutralize the pH of coal mining wastewater. This research was experimental study with pretest-postest with control group design, measured pH before and after treatment. Coal mines wastewater was sampled with composite sampling method. The result showed that the average of waste-water’s pH before added 2% hydrated lime were 4,9, while wastewater added by variated dose of hydrated lime, the pH changed. Added 1, 3, 5, 7 and 9 ml hydrated lime, the pH particularly to be 5,3, 7,1, 8,2, 9,7 and 10,5. Statistical test using One Way Anova showed the p value = 0,000, ore less than α = 0,05. There was the difference significantly between pH’s average of coal mine wastewater at variation in dose of 2% hydrated lime. Test of Linier regression found equation; y = 4,906 + 0,649x with correlation value (R) = 0,982. Optimum dose of 2% hydrated lime for pH neutralizing 1 litre of coal mine wastewater was 3,23, pH=7.Keyword: Air limbah batubara; larutan kapur; pH

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Fu, Jin Jin, and Ming Zhong Hu. "Coagulation Experimental Study of Coal Washing Wastewater Treatment." Applied Mechanics and Materials 361-363 (August 2013): 705–8. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.705.

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Coal washing wastewater is the end of the wet coal mine coal washing process industrial water , which contains a lot of slime and silt , causing serious pollution to the environment of the mine near this study, coagulation treatment of coal washing wastewater to determine the best flocculants and optimum operating parameters : agitation intensity 90r/min, polyaluminum chloride (30mg / l) dosage of 10ml the polyacrylamide dosage 3ml , pH = 7-11 . The treated effluent can be reused , either to protect the environment , but also save water resources .

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Batchamen Mougnol, Jean Bedel, Frans Waanders, Elvis Fosso-Kankeu, and Ali R. Al Alili. "Photodegradation of Polycyclic Aromatic Hydrocarbons from Coal Tar into Mine Wastewaters and Sewage Wastewater on a Flat-Bed Photoreactor." Pollutants 2, no. 3 (July 27, 2022): 333–46. http://dx.doi.org/10.3390/pollutants2030023.

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Wastewater treatment has been widely focused on the undesirable pollutants derived from various activities such as coking, coal gasification, oil spills, and petroleum. These activities tend to release organic pollutants, however polycyclic aromatic hydrocarbons (PAHs) happen to be highlighted as the most carcinogenic pollutant that easily comes into contact with the environment and humans. It causes major challenges due to its lingering in the environment and chemical properties. Although various techniques such as ions exchange, advanced oxidation, and reverse osmosis have been conducted, some of them have been ignored due to their cost-effectiveness and ability to produce a by-product. Therefore, there is a need to develop and implement an effective technique that will alleviate the organic pollutants (PAHs) in various water sources. In this study, a self-made flat-bed photoreactor was introduced to degrade PAHs in various water sources such as acidic mine drainage, alkaline mine drainage, and sewage wastewater. A previous study was conducted, and only 7.074 mg/L, 0.3152 mg/L and 1.069 mg/L in 4 weeks and thereafter 19.255 mg/L, 1.615 mg/L and 1.813 mg/L in 8 weeks in acidic mine drainage, alkaline mined, drainage, and sewage wastewater leachate from a 2916.47 mg/L of PAHs in coal tar, was analysed. It was found that the flat-bed photoreactor was highly effective and able to obtain a removal efficiency of 64%, 55%, and 58%, respectively; without the flat-bed photoreactor, happened the removal efficiency was of 53%, 33%, and 39%, respectively, in 60 min in acidic mine drainage, alkaline mine drainage, and sewage wastewater. The photodegradation of PAHs was favoured in the acidic mine drainage, followed by sewage wastewater and alkaline mine drainage respective, showing time and solar irradiation dependence.

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Zhao, Qun Ying, Yu Shu Wang, and Xiao Li Fan. "Application of Circulator Clarifier + Gravity Valve-Less Filtrate in the Disposal of Coal Mine Wastewater." Advanced Materials Research 518-523 (May 2012): 2366–69. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.2366.

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The characteristic of coal mine wastewater was introduced. Engineering design and practical run of circulator clarifier +gravity valve-less were summed up for treating wastewater of coal mine. Practice indicated that the process was steady and reliable, the effluent satisfied water quality Ⅲ standard of Surface Water Environmental Quality Standard (GB3838-2002),and there was remarkable economic results during the process of sewage treatment.

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Popovych, V., A. Voloshchyshyn, P. Bosak, and N. Popovych. "Waste heaps in the urban environment as negative factors of urbanization." IOP Conference Series: Earth and Environmental Science 915, no. 1 (November 1, 2021): 012001. http://dx.doi.org/10.1088/1755-1315/915/1/012001.

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Abstract Urbanization in Ukraine has led to the development of the Lviv-Volyn coal basin. One of the main negative factors in the operation of coal basins are mine dumps. In addition to environmental hazards, waste heaps of coal mines violate the attractiveness and aesthetics of towns. The wastewater from waste heaps is a secondary factor in reducing the environmental safety of the coal-mining region. These waters are concentrated at the foot of landfills forming the man-made reservoirs. The research presents the negative factors of mine dumps and the results of physical and chemical analysis of subtericone wastewater and its impact on environmental pollution. It is established that the most polluted is the wastewater from waste heaps of the Mezhyrichanska mine which is caused by its operating process. The man-made polluted wastewater from heaps is a secondary factor in reducing the level of ecological danger of the coal-mining region. These waters are concentrated at the foot of landfills in the form of man-made reservoirs. The aim of the research is to indicate the negative factors of urban waste heaps by studying the physical and chemical properties of underspoil waters within the cities of Chervonograd and Novovolynsk.

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Gao, Penghui, Meng Zhang, Yuji Du, Bo Cheng, and Donghai Zhang. "Study on bubble column humidification and dehumidification system for coal mine wastewater treatment." Water Science and Technology 77, no. 7 (February 19, 2018): 1909–19. http://dx.doi.org/10.2166/wst.2018.072.

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Abstract Water is important resource for human survival and development. Coal mine wastewater (CMW) is a byproduct of the process of coal mining, which is about 7.0 × 1010 m3 in China in 2016. Considering coal mine wastewater includes different ingredients, a new bubble column humidification and dehumidification system is proposed for CMW treatment. The system is mainly composed of a bubble column humidification and dehumidification unit, solar collector, fan and water tank, in which air is used as a circulating medium. The system can avoid water treatment component blocking for reverse osmosis (RO) and multi effect distillation (MED) dealing with CMW, and produce water greenly. By analysis of heat and mass transfer, the effects of solar radiation, air bubble velocity and mine water temperature on water treatment production characteristics are studied. Compared with other methods, thermal energy consumption (TEC) of bubble column humidification and dehumidification (BCHD) is moderate, which is about 700 kJ/kg (powered by solar energy). The results would provide a new method for CMW treatment and insights into the efficient coal wastewater treatment, besides, it helps to identify the parameters for the technology development in mine water treatment.

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Li, Yun Feng, Wei Feng Wan, Yao Guo Wu, Yan Juan Xu, Jin Lai Ren, Yuan Zhang, and Mao Sheng Zhang. "Effectiveness of Shaanbei Loess on Treatment of Wastewaters from Coal Mine." Advanced Materials Research 113-116 (June 2010): 331–34. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.331.

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Untreated disposal of coal mine wastewaters from Shanbei loess have environmental and public health concerns in the developing Shanbei Loess Plateau, Northwest China. An in-situ experiment was conducted in the easily accessible loess to study their efficiency in removal of pollutants. Approximately 565L of wastewater was used in the test, which lasted 333min. Loess samples were collected at 5 discrete depths, 0.2m, 0.4m, 0.6m, 1m, and 1.5m from the surface before, at the end of, and 20 days after the infiltration test. Pollutants commonly found in wastewaters were analyzed for all the loess samples. The test indicates the loess is more effective for Cd and Pb.

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10

Dharmappa, H. B., K. Wingrove, M. Sivakumar, and R. Singh. "Wastewater and stormwater minimisation in a coal mine." Journal of Cleaner Production 8, no. 1 (February 2000): 23–34. http://dx.doi.org/10.1016/s0959-6526(99)00309-1.

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11

Liu, Jia You. "Waste Heat Utility Technology in Coal Mine." Applied Mechanics and Materials 170-173 (May 2012): 2723–26. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.2723.

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Coal mine drainage, exhaust air and bathing wastewater, etc. contain a large amount of waste heat resource. Using the waste heat effectively is beneficial to achieve energy conservation and emissions reduction and improve economic benefit for coal mine. Heat pump and heat pipe are thermal devices recycling waste heat effectively. The ways and purpose of recycling waste heat in coal mine by using water-source heat pump, air-source heat pump and heat pipe exchanger is given. The performance of heat pump and heat pipe is briefly evaluated.

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12

Qi, Liu, Wang, Li, Li, Liang, and Sarfaraz. "Synthesis of the Hydrophobic Cationic Polyacrylamide (PADD) Initiated by Ultrasonic and its Flocculation and Treatment of Coal Mine Wastewater." Processes 8, no. 1 (January 2, 2020): 62. http://dx.doi.org/10.3390/pr8010062.

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In this study, a new type of hydrophobic cationic polyacrylamide P (AM-DMC-DABC) (PADD) was synthesized by ultrasonic (US)-initiated polymerization, which is used for the separation and removal of coal mine wastewater. The acrylamide (AM), methacryloyloxyethyl trimethyl ammonium chloride (DMC) and acryloyloxyethyl dimethylbenzyl ammonium chloride (DABC) were used as monomers to prepare). The factors that affecting the US initiated polymerization of PADD were analyzed. Fourier transform infrared spectroscopy (FT-IR), 1H nuclear magnetic resonance (1H NMR) and scanning electron microscopy (SEM) were used to characterize the chemical structure, thermal decomposition performance and surface morphology of the polymers. FT-IR and 1H NMR results showed that PADD was successfully synthesized. In addition, irregular porous surface morphology of PADD were observed by SEM analysis. Under the optimum conditions (pH = 7.0, flocculant dosage = 16.0 mg/L), the excellent flocculation performance (turbidity removal rate (TR) = 98.8%), floc size d50 = 513.467 μm, fractal dimension (Df) = 1.61, flocculation kinetics (KN0) = 27.24 × 10−3·s−1) was obtained by using high-efficiency flocculant PADD. Zeta potential analysis was used to further explore the possible flocculation mechanism of removal. The zeta potential and flocculation analytical results displayed that the flocculation removal process of coal mine wastewater mainly included hydrophobic effect, adsorption, bridging and charge neutralization, and electric patching when PADD was used. The PADD showed more excellent coal mine wastewater flocculation performance than PAD, commercial cationic polyacrylamide (CPAM) CCPAM and PAM. Thus PADD, with its good flocculation effect on coal mine wastewater under relatively wide pH range, had bright practical application value.

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Shishkov, Roman, and Valery Fedorin. "Justification of parameters mining and technological structure of modular mine sites in terms water disposal." E3S Web of Conferences 174 (2020): 02013. http://dx.doi.org/10.1051/e3sconf/202017402013.

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The high cost of any traditional coal mines consists of many factors their operation, one which is basically drainage. In mines and sections Russia, on average, for each ton coal mined, more than 2 m3 water is pumped from mine workings to day surface. For this work, more than 10 thousand pumping units with a total installed capacity about 1 million kW are used at mining enterprises. Therefore, rational design and proper operation, in particular, drainage plants mining enterprises are important technical and economic tasks today and in future, which leads to increased production volumes and a transition to a new stage in development coal industry using new technologies. The application mining technology structure mine sites located on a coal mine is considered. The result is that at design stage it becomes possible to highlight use of water pumping measures only at stage preparatory mine workings, reducing production costs for equipment and its operation, volumetric work, mine workings for water collectors and allocation personnel from drainage site to more significant work . A comparative analysis of two options is given, in terms efficiency wastewater disposal, namely actual situation of a certain period at enterprise SUEK-Kuzbass JSC mine Taldinskaya Zapadnaya-2 and the use mine sites.

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Růžek, L., M. Růžková, K. Voříšek, J. Vráblíková, and P. Vráblík. " Slit seeded grass-legume mixture improves coal mine reclamation." Plant, Soil and Environment 58, No. 2 (March 5, 2012): 68–75. http://dx.doi.org/10.17221/397/2011-pse.

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Slit seeding (sowing into shallow cuts to the soil surface) was evaluated on coal mine reclamation in the North Bohemian Brown Coal Basin (Czech Republic) between 2001 and 2008, on plots both with and without biodegradable waste enrichment. Prior to experimentation (in 2000, once) were applied dehydrated, anaerobically digested wastewater sludge, 200 (41) t/ha fresh mass (dry mass), together with paper mill waste, 400 (131) t/ha, and bark substrate Envima, 400 (145) t/ha. Spontaneous herbaceous cover was enhanced each end of April from 2001 to 2003 by slit seeded grass-legume mixture containing Festuca pratensis L. (46%); Lotus corniculatus L. (22%); Coronilla varia L. (18%); Festuca rubra L. (9%); and Medicago lupulina L. (5%). All slit seeded species proliferated better on surface strip mine deposits without biodegradable waste enrichment and brought beneficial changes in a number of parameters over the ensuing five years due to lower competition with native expanding eutrophic species including Calamagrostis epigejos L.; Cardaria draba L.; Urtica dioica L.; and Galium aparine L. Available organic carbon (extracted from field-moist soil by 0.5 mol/L K<sub>2</sub>SO<sub>4</sub>) showed a notable tendency toward values 10–66 mg C/kg DM (dry mass), microbial biomass 302–1131 mg C/kg DM, basal respiration 3.9–5.8 mg C/kg DM/h, and metabolic quotient (basal respiration/microbial biomass carbon) × 1000 = 5.2–7.9.    

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Thiruvenkatachari, Ramesh, Marc Younes, and Shi Su. "Coal mine site investigation of wastewater quality in Australia." Desalination and Water Treatment 32, no. 1-3 (August 2011): 357–64. http://dx.doi.org/10.5004/dwt.2011.2722.

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Baek, Jihye, Jong-Hwa Kim, Jung-Sook Lee, Ampaitip Sukhoom, and Wonyong Kim. "Aureimonas fodinaquatilis sp. nov., isolated from coal mine wastewater." Archives of Microbiology 202, no. 10 (July 26, 2020): 2655–61. http://dx.doi.org/10.1007/s00203-020-01988-8.

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Dlamini, Nkosinathi Goodman, Albertus Kotze Basson, and Viswanadha Srirama Rajasekhar Pullabhotla. "Synthesis and Application of FeCu Bimetallic Nanoparticles in Coal Mine Wastewater Treatment." Minerals 11, no. 2 (January 28, 2021): 132. http://dx.doi.org/10.3390/min11020132.

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Wastewater treatment has become a global challenge with wastewater treatment cost fast increasing. Industrial processes such as downstream processes, wastewater treatment, and several fermentation processes depend largely on the use of flocculants. Synthetic flocculants, which are conventionally used in wastewater treatment, are hazardous to the environment and are carcinogenic to human health. Therefore, bioflocculants can be used as an alternative due to their biodegradable and environmentally friendly nature. However, low efficacy hinders their industrial application. This necessitates the need for a new technology to combat wastewater treatment challenges. Nanotechnology provides the platform to explore the possible solutions to these problems. The combination of two different metals results in the formation of bimetallic nanoparticles (BNPs). Due to better properties, bimetallic nanoparticles have attracted huge attention as compared to monometallic nanoparticles from both technological and scientific views. Iron copper bimetallic nanoparticles (FeCu BNPs) were successfully stabilized by bioflocculant and used in the coal mine wastewater treatment. Infrared spectrometric analysis showed the presence of carboxyl (COO−), hydroxyl (−OH), and amino (−NH2) functional groups. SEM images showed irregular and crystalline like morphology. Meanwhile, TEM analysis revealed chain like agglomerated nanoparticles. FeCu BNPs exhibited a wide pH stability range from 3, 7, and 11 with 99% flocculation activity at pH 7 and at lowest dosage of 0.2 mg/mL. After treating wastewater, the FeCu BNPs could remove pollutants such as phosphate, sulfate, calcium, chemical oxygen demand (COD), and biological oxygen demand (BOD) with phosphate having the highest removal efficacy of 99%.

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Gao, B., Q. Yue, and J. Miao. "Evaluation of polyaluminium ferric chloride (PAFC) as a composite coagulant for water and wastewater treatment." Water Science and Technology 47, no. 1 (January 1, 2003): 127–32. http://dx.doi.org/10.2166/wst.2003.0033.

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Coal gangue is a kind of waste from coal mine processing. Polyaluminium ferric chloride (PAFC), a new type of inorganic composite coagulant, was prepared by using the waste from the Mineral Bureau of Yanzhou, China, hydrochloric acid and calcium carbonate as raw materials. The relationship between the stability of ferric ion and the ionic strength of solution was investigated. The zeta potential of PAFC hydrolysis products of PAFC and the coagulation performances under different pH value were discussed. The turbidity removal properties of PAFC, polyaluminium (PAC) and polyferric sulfate (PFS) were compared, and the color removal effect of PAFC for the wastewater containing suspended dyes was also tested. In addition, the coagulation performance of PAFC for actual wastewaters from petrochemical plant, iron and steel plant, and coal mining processing was evaluated. The experimental results suggest that PAFC took a maximum value of zeta potential at about pH 5.8 on the positive side. Compared with PAC, PAFC gives better turbidity removal performance in the range of pH from 7.0 to 8.4. PAFC gives good color removal performance on suspension dyes. PAFC also gives good wastewater purifying results for the actual wastewater. Therefore, PAFC is a high-effect and stable water treatment agent.

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Dao, Van, Xuan Bui, Le Zung, and Xuan Tran. "A NEW VIETNAM NATIONAL TECHNICAL REGULATION ON COAL MINE WASTEWATER." Sustainable Development of Mountain Territories 11, no. 2 (June 28, 2019): 211–20. http://dx.doi.org/10.21177/1998-4502-2019-11-2-211-220.

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Ai-qin, Shan, Chen Suo-zhong, and Feng Li-li. "Study on mechanisms of treating mine wastewater by goaf and the methods of recycling mine wastewater in Jining No.2 coal mine." Procedia Earth and Planetary Science 1, no. 1 (September 2009): 1242–46. http://dx.doi.org/10.1016/j.proeps.2009.09.191.

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Batchamen Mougnol, Jean Bedel, Frans Waanders, Elvis Fosso-Kankeu, and Ali Rashed Al Alili. "Leaching of Polycyclic Aromatic Hydrocarbons from the Coal Tar in Sewage Wastewater, Acidic and Alkaline Mine Drainage." International Journal of Environmental Research and Public Health 19, no. 8 (April 15, 2022): 4791. http://dx.doi.org/10.3390/ijerph19084791.

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Polycyclic aromatic hydrocarbons (PAHs) have been a problem in the environment for an extended period. They are mostly derived from petroleum, coal tar and oil spills that travel and are immobilized in wastewater/water sources. Their presence in the environment causes a hazard to humans due to their toxicity and carcinogenic properties. In the study, coal tar was analyzed using Gas Chromatography–Mass Spectrometry (GC–MS) and a concentration of 787.97 mg/L of naphthalene, followed by 632.15 mg/L of phenanthrene were found to be in the highest concentrations in the various water sources such as sewage, alkaline and acid mine drainage. A design column was used to investigate the leaching process and assessments were conducted on 300 mL of the various water sources mentioned, with 5 g of coal tar added and with monitoring for 4 weeks. The influence of the physiochemical properties of the receiving water sources, such as sewage, and acid and alkaline mine drainage, on the release of PAHs from the coal tar was assessed. The acidic media was proven to have the highest release of PAHs, with a total concentration of 7.1 mg/L of released PAHs, followed by 1.2 mg/L for the sewage, and lastly, 0.32 mg/L for the alkaline mine drainage at room temperature.

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Haidash, Sоfiia, and Viktor Kostenko. "PROBLEMS OF POLLUTION OF MINING ENTERPRISES AND THEIR CLEANING FROM PETROLEUM PRODUCTS." Journal of “Problems of Ecology”, no. 1 (2021): 32–38. http://dx.doi.org/10.31474/2073-8102-2021-1-32-38.

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Introduction. In the process of coal mining and beneficiation, a large amount of wastewater is formed at enterprises. Sewage has a variety of origins, which can be classified into: natural (mine, quarry, drainage); technological (water for carrying out technological process, water for cooling of cars and devices); surface (water from rain, snow and maintenance of the enterprise); household (water is formed from showers, bathrooms, dining rooms). Wastewater from mines and factories is highly polluted and can have toxic effects on the environment. Problem Statement. Natural waters have a high rate of mineralization, salts of heavy metals, iron. Waters are polluted with organic matter, large and small particles of coal and rock. Surface and process effluents are contaminated with coal dust and petroleum products. Domestic waters are contaminated with surfactants, fats, animal and plant food residues, alkali, cadmium, nickel. Purpose. The aim is to study in detail the sources of pollution of mine effluents, to determine their composition and properties. Identify the seasonality of sources. Describe the method of water treatment and suggest possible improvements to existing technology. Materials and methods. The water must undergo some purification before it enters the environment. One of the main processes of wastewater treatment is filtration. This process is the most common and effective, so it should be part of the cleaning technology. The filter element can be a thin partition with pores or three-dimensional elements with a porous filler. This paper presents a technology with a granular filter, also called fast. The fast filter works on the principle of volume filtration, impurities are retained in the entire volume of the filter medium, in the pores and on the surface of the grains. Before filtration, the water is treated with coagulants. Types of granular materials: quartz sand, anthracite, expanded clay, expanded polystyrene, ceramic sand, mesoporous coal. Mesoporous coal is a promising material for filtration. Results. In the result of consideration of the composition and properties of wastewater, the appropriate technological scheme of mine wastewater treatment is selected and described. The technology provides purification from large impurities in open hydrocyclones, water treatment with flocculant, provides a filter and clarifier, enhanced purification from petroleum products in the oil trap and carbon filter. Filling the filter is sent to the coal warehouse, which is a cost-effective solution. Conclusions. The effluents of mining enterprises are saturated with pollutants and have a very aggressive composition, so it is unacceptable to release them into the environment without prior lighting. Should attention be paid to the purification of petroleum products that fall into the water as a result of the operation of machines and devices. As one of the possible methods, the technological scheme, improved by the department with oil trap and filter, is presented. Filter backfill is mesoporous coal, which is a very promising sorbent. Water treated with this technology can be used for recirculating water supply. This is justified not only by the economic aspect, but also by the environmental one. Keywords: mine drains, mining, pollution, petroleum products, filtration, technological scheme.

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Selepe, Tlou Nelson, Remilekun Akanbi, Tsolanku Sidney Maliehe, Kgabo Moganedi, and Peter Masoko. "Flocculating Activity of a Bioflocculant from Bacillus megaterium BMBF in Treatment of Domestic and Coal Mine Wastewater." Applied Sciences 12, no. 16 (August 19, 2022): 8312. http://dx.doi.org/10.3390/app12168312.

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Attention has been paid to bioflocculants production because of their effectiveness, innocuousness and environmental friendliness. This study aimed to characterise a bioflocculant from Bacillus megaterium BMBF and apply it in wastewater treatment. The proteins, carbohydrates and uronic acid were calculated using the Bradford, phenol–sulphuric acid and carbazole assays, respectively. An energy-dispersive X-ray (EDX) and infrared spectrometry were employed for the identification of the elemental composition and effective units, respectively. Cytotoxicity was carried out against Vero (African green monkey kidney) and bovine dermis cells using a colorimetric cytotoxicity assay. The reduction in chemical oxygen demand (COD) and biological oxygen demand (BOD) in domestic and coal mine wastewater was studied using the Jar test. The flocculant was composed of 12% protein, 27% carbohydrates and 61% uronic acid. Infrared spectrometry indicated hydroxyl, carboxyl and amino groups. EDX indicated C (61%) and O (17.5%) as the main elements. The bioflocculant revealed the mean inhibition concentration of 59 ug/mL against bovine dermis and 240 µg/mL on Vero cells. Maximum COD and BOD removal percentages of 97% and 99.3% were recorded on coal mine wastewater treatment and about 99.2% (COD) and 93% (BOD) on domestic wastewater. In conclusion, the bioflocculant from B. megaterium has potential industrial utility.

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Wang, Xinfeng, Yuhao Gao, Xiaojun Jiang, Qiao Zhang, and Wengang Liu. "Analysis on the Characteristics of Water Pollution Caused by Underground Mining and Research Progress of Treatment Technology." Advances in Civil Engineering 2021 (May 18, 2021): 1–14. http://dx.doi.org/10.1155/2021/9984147.

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Coal is the primary source of energy in China’s energy structure system. With the large-scale mining of mineral resources, a large amount of mine water will be produced in the process of development, construction, and production, which will pollute and damage the ecological environment of mine water. At present, China vigorously advocates coal revolution, implements low-carbon economy, and carries out clean production of energy development and utilization. Green mining, precision mining, and other strategic ideas have been applied to mine development to guide production practice. This paper does an in-depth analysis of the physical, chemical, biological, and environmental characteristics of mine water, puts forward the basic classification of mine water, and points out the characteristics of environmental hazards of mine water. Aiming at different types of mine water, such as mine wastewater, drainage water, goaf water, mine water with suspended solids, high salinity mine water, acid mine water, and mine water with special pollution, the paper puts forward the mine water treatment and resource utilization technology with different characteristics and strong pertinence. On this basis, the comprehensive treatment and development direction of mine water in the future are prospected.

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Zhao, Jiang Qian, Hai Yan Ju, Peng Zhang, and Shao Lin Liu. "Leakage Mechanism of the Wastewater Dam in Metal Mine and its Anti-Seepage Technology." Applied Mechanics and Materials 641-642 (September 2014): 416–19. http://dx.doi.org/10.4028/www.scientific.net/amm.641-642.416.

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The acid mine drainage has the widest pollution range and biggest harm degree, which forms the potential corrosion hazards to sewage dams in mental mine. Based on the investigation and analysis of the acid mine drainage, the evolution law influence of physical and mechanical properties and leakage mechanism of sewage dam is revealed under the action of the acid mine drainage. In order to prolong its service life and insure the safe operation of the construction engineering, the program of concrete anti-seepage wall with coal fly ash is adopted, which can improve the impermeability and structure of concrete, enhancing the anti-seepage wall durability under acidic environment, providing the basis of scientific data and technical basis for acid mine water environment of basic construction.

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Zhao, Jiang Qian, Hai Yan Ju, and Jian Hua Li. "Seepage Analysis and Prevention Technology Research of Wastewater Reservoir in Metal Mine." Applied Mechanics and Materials 170-173 (May 2012): 439–42. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.439.

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Based on the investigation of the seepage causes wastewater reservoir of in one metal mine, the erosion mechanism is analyzed that the acid mine drainage erosion the earth-rock dam, and the technology program of vertical anti-seepage wall is chosen that use concrete with coal fly ash as anti-seepage wall. The practice has proven that such concrete vertical anti-seepage wall can improve the impermeability and structure of concrete, enhancing the anti-seepage wall durability under acidic environment. It can be reference to similar projects.

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Kiswanto, K., H. Susanto, and S. Sudarno. "Treatment of Coal Mine Acid Water Using Nf270 Membrane as Environmentally Friendly Technology." Jurnal Pendidikan IPA Indonesia 9, no. 3 (September 30, 2020): 439–50. http://dx.doi.org/10.15294/jpii.v9i3.23310.

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Ex-mining pond water is widely used for the daily needs of the people these days, such as bathing, washing, and even drinking. Over time, it turns out that coal mine acid water has polluted the environment. The use of membrane technology to produce water that meets drinking water quality standards by the Minister of Health Regulation No. 492 of 2010 can be a solution to this problem. The NF270 membrane is a membrane process between reverse osmosis and ultrafiltration, which has a lower flux and operating pressure below 0.2-1.53 Mpa compared to reverse osmosis. Membrane NF270 is used for the reclamation of wastewater, water purification and softening, seawater desalination, and others. Its high rejection of organic molecules with a molecular weight of 200-2000 Da ions and multivalent can remove suspended solids, natural organic matter, bacteria, viruses, salts, and divalent ions contained in water, including coal mine acid water. The purpose of treating acid mine drainage with the NF270 membrane is to remove COD, TSS, TDS, and Fe metals. The NF270 membrane was used in this study to treat the coal mine acid water of PT. Bukit Asam. The performance of the NF270 process was assessed from the effect of pressure (4, 5, and 6 bar) on the flux and rejection rate of each parameter in a single solution, mixed and aqueous coal mine acid solution. The optimum pressure of the NF270 membrane for all parameters was 6 bar. This optimum pressure was then used to compare the phenomenon of flux that occurred and the level of rejection produced in the original sample of coal mine acid water. In the original coal mine acid water, there was a significant decrease in flux due to fouling deposition on the membrane surface. This phenomenon of decreasing flux was caused by fouling and polarization concentration. The rejection rates produced for the parameters of COD, TSS, TDS, and Fe with NF270 membranes were 56.4-93.1%; 78.5-100%; 43-69.3%; 67-100% respectively. Treated coal mine acid water using NF270 membrane technology can be used as drinking water that meets the standards of the Indonesian Ministry of Health Regulation. Thus, NF270 membrane technology can be used to process coal mine acid water into environmentally friendly drinking water.

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Silva, Rodrigo de Almeida, Marina Paula Secco, Jean Carlo Salomé dos Santos Menezes, Ivo André Homrich Schneider, and Richard Thomas Lermen. "Reduction of High-Chromium-Containing Wastewater in the Leaching of Pyritic Waste Rocks from Coal Mines." Sustainability 14, no. 19 (September 20, 2022): 11814. http://dx.doi.org/10.3390/su141911814.

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Coal is an abundant resource which can be used to produce low-cost energy; however, its usage causes great environmental damage. Before mineral coal can be used, it must be processed to remove coal tailings. These tailings contain pyrite and accumulate in large dumps, presenting significant environmental liabilities, such as acid mine drainage. Another industry that generates environmental liabilities is the chrome-plating industry, mainly because it produces hexavalent chromium (Cr6+) waste. The main aim of this work was to evaluate Cr6+ as a reduction agent in trivalent chromium (Cr3+) conversion in the leaching of coal-mine waste containing pyrite. Cr3+ is about 100 times less toxic than Cr6+ and can be easily removed from industrial effluents by alkaline precipitation. There are several sources of effluents containing Cr6+—a compound which is known worldwide to be toxic, carcinogenic, and mutagenic. A leaching and treatment device was developed and tested for waste treatment. The results indicated that the developed treatment system reduced 100% of Cr6+ to Cr3+ through pyrite leaching in a Cr6+ wastewater sample from the electroplating industry. In addition, the chromium sludge resulting from the treatment process, after calcination, was tested in a ceramic glaze as a pigment and, when compared with an industrial pigment, showed similar mineralogical characteristics.

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Luo, Ke Jie, and Guang Meng Ren. "Coagulant Prepared by Gangue and its Application in Treatment of Coal Washing Wastewater." Advanced Materials Research 142 (October 2010): 270–73. http://dx.doi.org/10.4028/www.scientific.net/amr.142.270.

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For solving the question about PFASS production using gangue, the best conditions for withdrawing the alkali and the silicon from the gangue during producing PFASS were obtained by using orthogonal experimental method. That is, the best acid soak conditions are: acid soak time(A) 1.5h, ratio of NaCl flux to gangue quality (B) 0.05:1, solid to liquid ratio(C) 1:10; the best alkaline leaching conditions are: alkaline leaching time 2h, concentration of the lye 5mol/L, solid to liquid ratio(C) is 1:10. PFASS, a high molecular inorganic coagulant, was prepared by gangue that is a kind of waste solid in mine. Processing conditions of the coagulant preparation were studied. The coagulant was used to treat a coal washing wastewater. The experimental results show that effluent quality is good. SS and turbidity of coal washing wastewater decrease evidently. And huge amounts of coal can be recycled.

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Gao, Tai Zhong, and Fu Gang He. "Research of Geological Environment Remediation and Reconstruction of Coal Mining Area in Western of Shijiazhuang City, China." Advanced Materials Research 726-731 (August 2013): 1628–31. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.1628.

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Improper exploitation of mine would lead to a series of geological disasters, such as surface subsidence, collapse, landslide, debris flow, water pollution, earthquake and etc., the results would endanger the safety of life and property, and caused serious economic losses to the state. As a case of Jiazhuang coal mining area of western of Shijiazhuang City based on the ecological problems, on the basis of PSR model, mine geological environment remediation basis, principles and objectives have been set. We puts forward a series of concrete measures of functional areas of governance for remediating of destruction problem of geological environment in western of Shijiazhuang coal mining area, taking comprehensive protection measures, soil formation, shelterbelt, slope shrub, wastewater, waste liquid emission in the mine production process must fit for standard of country. planting vegetation and the scarps leaved by mining reclamation or fill soil in the mine tailings, taking restoration of the original landform governance when constructed buildings and roads destroy the landform in field area.

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Pondja Jr., Estêvão A., Kenneth M. Persson, and Nelson P. Matsinhe. "A Survey of Experience Gained from the Treatment of Coal Mine Wastewater." Journal of Water Resource and Protection 06, no. 18 (2014): 1646–58. http://dx.doi.org/10.4236/jwarp.2014.618148.

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Thiruvenkatachari, Ramesh, Mathew Francis, Michael Cunnington, and Shi Su. "Application of integrated forward and reverse osmosis for coal mine wastewater desalination." Separation and Purification Technology 163 (May 2016): 181–88. http://dx.doi.org/10.1016/j.seppur.2016.02.034.

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Makridin, Eugene, Sergey Markov, Elena Murko, and Ivana Ondrejmiskova. "Open pit mine wastewater filtration in the overburden rock debris: case study." E3S Web of Conferences 303 (2021): 01033. http://dx.doi.org/10.1051/e3sconf/202130301033.

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Discharge of untreated quarry water into natural water reservoirs is unacceptable for environmental reasons. This circumstance is especially relevant for coal mining regions with a high density of mining enterprises. Treatment of quarry waste water at mining enterprises is a necessary process, provided for in the design documentation. It is due to the significant pollution of quarry water by suspended solids, dissolved salts and organic substances. In addition to expensive sorbents (e.g. zeolite), overburden rocks, confined to the mined area of coal deposit, are used for construction of filtering dams. They are used to construct treatment facilities designed for the entire lifetime of the mining enterprise. Thus, their permeability and purification capacity should be maintained for decades. The movement of filtered water in such massifs is subject to the known laws of filtration. Filtering dams should provide both a free movement of water and the required level of its purification. This is achieved by selecting the appropriate geometry of filter dams (their sizes, base slopes) and the choice of overburden capable of providing the required level of purification in a long and qualitative term. The article presents the results of studies of the geometry of the filtering massif and the methodology of selection of overburden used for the construction of filtering dams.

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Watts, Mathew P., and John W. Moreau. "Thiocyanate biodegradation: harnessing microbial metabolism for mine remediation." Microbiology Australia 39, no. 3 (2018): 157. http://dx.doi.org/10.1071/ma18047.

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Thiocyanate (SCN–) forms in the reaction between cyanide (CN–) and reduced sulfur species, e.g. in gold ore processing and coal-coking wastewater streams, where it is present at millimolar (mM) concentrations1. Thiocyanate is also present naturally at nM to µM concentrations in uncontaminated aquatic environments2. Although less toxic than its precursor CN–, SCN– can harm plants and animals at higher concentrations3, and thus needs to be removed from wastewater streams prior to disposal or reuse. Fortunately, SCN– can be biodegraded by microorganisms as a supply of reduced sulfur and nitrogen for energy sources, in addition to nutrients for growth4. Research into how we can best harness the ability of microbes to degrade SCN– may offer newer, more cost-effective and environmentally sustainable treatment solutions5. By studying biodegradation pathways of SCN– in laboratory and field treatment bioreactor systems, we can also gain fundamental insights into connections across the natural biogeochemical cycles of carbon, sulfur and nitrogen6.

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Ivanova, L. A., N. S. Golubevа, I. V. Timoshchuk, A. K. Gorelkina, A. Yu Prosekov, Z. P. Sapurin, and A. V. Medvedev. "Evaluation of the Efficiency of Wastewater Treatment of a Coal Mining Enterprise and its Impact on the Pollution of Small Rivers." Ecology and Industry of Russia 27, no. 1 (January 10, 2023): 60–65. http://dx.doi.org/10.18412/1816-0395-2023-1-60-65.

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The analysis of the qualitative composition of the waste water of the coal mining enterprise was carried out. As a result of monitoring studies, data on the composition of pollutants discharged into the water of small rivers were obtained. It is established that the feature of quarry waters is an increased content of suspended solids (inorganic dust) from drilling, blasting, overburden and mining operations; petroleum products from oil and fuel spills; nitrites and nitrates formed when using explosives; iron formed as a result of the oxidation of pyrite (often found in the host rocks), metal structures and parts of equipment and sulfates. The applied technology of wastewater treatment at a coal mine is considered, and its effectiveness is justified. It is shown that the main problem in the field of water resources protection is the lack of adapted technologies for deep wastewater treatment in relation to a specific enterprise. The ways of improving the technological level and quality of treatment of quarry wastewater are determined.

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Yao, Qiang-ling, Ze Xia, Chuan-jin Tang, Liu Zhu, Wei-nan Wang, Tian Chen, and Ying-ming Tan. "Characteristics of Heavy Metal Ion Adsorption by Silty Mudstones in Coal Mine Goafs." Geofluids 2020 (February 12, 2020): 1–17. http://dx.doi.org/10.1155/2020/8560151.

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Coal mine goafs can be used to store and purify mine water; therefore, they are important for mitigating the environmental impact of mining on ecologically fragile areas in Western China. Coal gangue in goafs can reduce turbidity, suspended matter, total hardness, and chemical oxygen demand (COD) in mine wastewater. Because gangue in goaf areas is rich in clay minerals, they serve as ion exchange sites. We investigated the adsorption of heavy metal ions by silty mudstones in the Ulan Mulun mine. The adsorption kinetics and isothermal adsorption characteristics of four heavy metal ions, i.e., Pb(II), Cd(II), Cr(III), and Mn(II), were investigated using batch experiments. Under a pH of 6.75 and temperature of 20°C, the adsorption capacity of silty mudstone particles (<74 μm) was 6.3012 g, 1.5701, 1.2571, and 1.3729 mg/g for Pb(II), Cd(II), Cr(III), and Mn(II), respectively. Based on the experimental results, quantitative relationships between the adsorption quantity per unit of rock surface and the equilibrium concentration of heavy metals in solution were developed using Langmuir, Freundlich, and D–R equations. The relationships were used to obtain the equilibrium concentration of the solution. Finally, the ratio of the f value of the water-rock contact area in the goaf to the water volume was calculated and analyzed. The f value was inversely proportional to the average vertical opening of gaps between gangues in the goaf. The adsorption rate functions for Pb(II), Cd(II), Cr(III), and Mn(II) in the goaf were obtained, and the corresponding adsorption capacities were calculated. The adsorption capacities were controlled by the f value and adsorption properties of the gangue. These results can be used in future studies on mine wastewater treatment.

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Wibowo, Yudha Gusti, Candra Wijaya, Petrus Halomoan, Aryo Yudhoyono, and Muhammad Safri. "Constructed Wetlands for Treatment of Acid Mine Drainage: A Review." Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan 19, no. 2 (May 26, 2022): 436–50. http://dx.doi.org/10.14710/presipitasi.v19i2.436-450.

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The coal mining industry is an industrial activity that impacts the environment. This activity will generate acid mine drainage due to the interaction of water, air and sulfide minerals. Acid mine drainage is wastewater with low pH and heavy metals content. These conditions will be given some negatives impact on the environment and human health. The low-cost, applicable and simple method to solve acid mine drainage in mining areas is constructed wetlands. Hence, this paper aims to describe the potential of wetlands as a low-cost and applicable method for acid mine drainage treatment. This paper also describes the holistic information about an overview of constructed wetlands, acid mine drainage (AMD) production and their negative impacts, recent trends in constructed wetlands, recommendation components of wetlands, potential application in rural areas and future considerations

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XuanThuong, Dang, Do ThiLan, and Nguyen Mai Hoa. "A research on Treating and Recycling Wastewater from Mine Tunnels at 790 Coal Mine, MTV 790 Ltd. Company." Modern Environmental Science and Engineering 03, no. 06 (June 3, 2017): 424–30. http://dx.doi.org/10.15341/mese(2333-2581)/06.03.2017/008.

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Kasmiati, Getari, Rona Ayu Sakinah, and Bambang Yudono. "The Analysis of Manganese (Mn) in Waste Water Treatment (IPAL) of Coal Mine of PT Bukit Asam Indonesia." Indonesian Journal of Fundamental and Applied Chemistry 6, no. 2 (June 20, 2020): 53–58. http://dx.doi.org/10.24845/ijfac.v6.i2.53.

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Wastewater from the coal mining process containing heavy metal manganese is bad for water body and health of living things around it. The South Sumatra Governor Regulation states that the content of iron (Fe) and manganese (Mn) must contain a maximum total of 7 mg/L and 4 mg/L before being released into the environment. This study aimed to verify the total dissolved Mn analysis method. Thirty-four (34) samples from the wastewater treatment plant pond were digested and measured by the Atomic Absorption Spectrophotometer (AAS) at a wavelength of 279.5 nm. The analysis performed were the precision, sensitivity, linearity, LOD detection limits and LOQ quantization limits. The measurement results showed the parameter value for a precision of 1.562%; linearity (coefficient of determination) standard curve 0.9939; sensitivity 0.0375; LOD 0.4287 g/mL; and LOQ 1.4291 g/mL. In conclusion, the measurement data for the total dissolved manganese met the quality standards for wastewater stated in the Regulation of the Governor of South Sumatra No.8 of 2012 by applying the predetermined method

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Banerjee, Soumya, Augustine LaminKa-ot, S. R. Joshi, Tamal Mandal, and Gopinath Halder. "Optimization of Fe2+ Removal from Coal Mine Wastewater using Activated Biochar of Colocasia esculenta." Water Environment Research 89, no. 9 (September 1, 2017): 774–82. http://dx.doi.org/10.2175/106143017x14902968254791.

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Lanctôt, C., S. D. Melvin, F. D. L. Leusch, S. Wilson, and L. Fabbro. "Locomotor and behavioural responses of empire gudgeons (Hypseleotris compressa) exposed to coal mine wastewater." Chemosphere 144 (February 2016): 1560–66. http://dx.doi.org/10.1016/j.chemosphere.2015.10.026.

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Ma, Qiao, Yuan-Yuan Qu, Xu-Wang Zhang, Wen-Li Shen, Zi-Yan Liu, Jing-Wei Wang, Zhao-Jing Zhang, and Ji-Ti Zhou. "Identification of the microbial community composition and structure of coal-mine wastewater treatment plants." Microbiological Research 175 (June 2015): 1–5. http://dx.doi.org/10.1016/j.micres.2014.12.013.

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Moersidik, S. S., N. E. Yulianita, S. U. Hasanah, A. E. Hidayat, M. A. Pratama, and C. R. Priadi. "THE PERFORMANCE OF FLY ASH-BASED COAGULANTS TO REMOVE HEAVY METALS FROM ACID MINE DRAINAGE." RASAYAN Journal of Chemistry 15, no. 03 (2022): 2016–25. http://dx.doi.org/10.31788/rjc.2022.1536996.

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As one of the largest coal-producing countries, Indonesia’s mining activity can increase the potential for significant environmental damage, particularly the increased production of wastewater and acid mine drainage. This study focused on modified fly ash’s ability to remove turbidity and heavy metals from artificial acid mine drainage. The modification was applied by extracting fly ash, leached with different acids like hydrochloric and sulfuric acid, which can be utilized as coagulants using jar tests. The effects of detention time, initial and final potential of hydrogen, and coagulant dose were investigated. The result showed that the modified fly ash coagulants show potential use in reducing turbidity, copper, and zinc of artificial acid mine drainage. The fly ash-hydrochloric acid coagulant showed better results in removing zinc, while the fly ash-sulfuric acid coagulant is better in removing copper.

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Noor, Ihsan, Yudi Firmanul Arifin, Bambang Joko Priatmadi, and Akhmad Rizally Saidy. "Role of the Selected Grass Species in Developing of Swampy Forest System for Passive Treatment of Acid Mine Drainage." Materials Science Forum 1025 (March 2021): 273–78. http://dx.doi.org/10.4028/www.scientific.net/msf.1025.273.

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Acid Mine Drainage (AMD) is one of the consequences of environmental impact due to surface coal mining and has big challenge how to treat the AMD both active and passive treatment efficient and effectively. The most expensive method to actively raise the pH and concentration heavy metal reduction of this wastewater is the use of chemical additives. We present the development of passive treatment with Swampy Forest (SF) system as a new natural and sustainable method with lower costs, and greater environmental sustainability. The SF system consists of selecting organic matter and combining it with the planting of selected grass and tree species in the form of a forest constructed wetland. As a preliminary to the construction of the SF, a batch reactor system was used to carry out experiments to find the best individual grass species for SF as the development of AMD passive treatment. The four grass species selected were shown to reduce the concentration of Fe and Mn, which generally has out of threshold value, thus achieving the threshold parameter to comply with applicable regulations for managing mine wastewater.

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Cui, Mingcan, Min Jang, Fred S. Cannon, Seunmin Na, Jeehyeong Khim, and Jae Kwang Park. "Removal of dissolved Zn(II) using coal mine drainage sludge: Implications for acidic wastewater treatment." Journal of Environmental Management 116 (February 2013): 107–12. http://dx.doi.org/10.1016/j.jenvman.2012.12.013.

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Wang, Y. R., Daniel C. W. Tsang, William E. Olds, and Paul A. Weber. "Utilizing acid mine drainage sludge and coal fly ash for phosphate removal from dairy wastewater." Environmental Technology 34, no. 24 (December 2013): 3177–82. http://dx.doi.org/10.1080/09593330.2013.808243.

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Obracaj, Dariusz, Nikodem Szlązak, and Marek Korzec. "Using a Mine Dewatering System to Increase Cooling Capacity and Energy Recovery of Underground Refrigeration Plant: A Case Study." Energies 15, no. 24 (December 14, 2022): 9481. http://dx.doi.org/10.3390/en15249481.

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Heat stress in deep hot mines is a factor that often determines the possibility of technical mining of natural resources. One of the solutions enabling miners to work in such mines is air cooling. Cooling systems vary, and their selection depends on the type of mine and the mining methods used. Limited air cooling capabilities exist in electric-powered coal mines. The main solution for air cooling is based on movable spot air coolers. Such systems commonly use surface or underground refrigeration plants. An underground refrigeration plant (URP) equipped with compressor chillers does not achieve more than 2.5–3.0 MW of cooling capacity due to the limited heat rejection capacity of return air streams in a typical coal mine. The method discussed in this paper, using mine water to discharge waste heat from the underground refrigeration plant, provides a measurable benefit for optimizing the mine air cooling system. The main purpose of this research is to study the feasibility and effect of water diversion from the actual mine drainage system to the underground refrigeration plant. The water drainage system in an underground mine is called the dewatering system of the mine. The heated water in the condensers of the chillers is directed back to the mine’s central dewatering system. The recovery from water discharged to the surface contributes to optimising energy consumption for a mine air cooling and the sustainable discharge of wastewater. In addition, using the total water flow from the mine dewatering system to reject heat in compressor chillers, compared with the traditional solution, can improve the cooling capacity of URP. These findings may provide beneficial guidance for practical applications in deep hot mines with small natural water inflow.

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Elkady, Marwa, Hassan Shokry, and Hesham Hamad. "New Activated Carbon from Mine Coal for Adsorption of Dye in Simulated Water or Multiple Heavy Metals in Real Wastewater." Materials 13, no. 11 (May 30, 2020): 2498. http://dx.doi.org/10.3390/ma13112498.

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Nano-activated carbon (NAC) prepared from El-Maghara mine coal were modified with nitric acid solution. Their physico-chemical properties were investigated in terms of methylene blue (MB) adsorption, FTIR, and metal adsorption. Upon oxidation of the ACS with nitric acid, surface oxide groups were observed in the FTIR spectra by absorption peaks at 1750–1250 cm−1. The optimum processes parameters include HNO3/AC ratio (wt./wt.) of 20, oxidation time of 2 h, and the concentration of HNO3 of 10% reaching the maximum adsorption capacity of MB dye. Also, the prepared NAC was characterized by SEM, EDX, TEM, Raman Spectroscopy, and BET analyses. The batch adsorption of MB dye from solution was used for monitoring the behavior of the most proper produced NAC. Equilibrium isotherms of MB dye adsorption on NAC materials were acquired and the results discussed in relation to their surface chemistry. Langmuir model recorded the best interpretation of the dye adsorption data. Also, NAC was evaluated for simultaneous adsorption of six different metal ions (Fe2+, Ni2+, Mn2+, Pb2+, Cu2+, and Zn2+) that represented contaminates in petrochemical industrial wastewater. The results indicated that the extracted NAC from El-Maghara mine coal is considered as an efficient low-cost adsorbent material for remediation in both basic dyes and metal ions from the polluted solutions.

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Lanctôt, C., S. D. Melvin, L. Fabbro, F. D. L. Leusch, and S. P. Wilson. "Effects of coal mine wastewater on locomotor and non-locomotor activities of empire gudgeons (Hypseleotris compressa)." Ecotoxicology and Environmental Safety 127 (May 2016): 36–42. http://dx.doi.org/10.1016/j.ecoenv.2016.01.010.

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Nicomrat, Duongruitai. "Characteristics of Cultivated Sulfur Oxidizing Bacteria Community Isolated from Coal Mine Treatment Plant in H₂S Removal." Applied Mechanics and Materials 848 (July 2016): 127–30. http://dx.doi.org/10.4028/www.scientific.net/amm.848.127.

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Sulfur cycling based on biological oxidation of sulfide to sulfate involves sulfur-oxidizing reducing microbial communities associated with sulfide which normally oxidize sulfide in acidic environment to sulfate. The chemolithotrophic sulfur oxidizing bacteria (SOB) usually use organic and/ or inorganic sulfide initially oxidizing and subsequently released sulfate under aerobic or subaerobic condition. This study was to understand SOB community isolated from coal mine treating plant at Mae Moh, Lampang and their potentials in hydrogen sulfide (H2S) removal. In this result, with common heterotrophic medium supplemented with glucose 10 mg/ L and sulfur 0.001%, the cultured SOB were successfully cultivated based on most probable number method. Their activity showed an increase in sulfate concentration over time correspondent to an increase in culturable SOB communities. The SOB community could also develop their own microbial niches in the present of continuously aerated H2S in the medium at 30-40°C during 7 day incubation. They could remove H2S between 200-500 ppm from wastewater. These sulfur oxidized H2S contaminated in wastewater treatment facilities or drainage. Their species will be further isolated and characterized by molecular analysis.

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Journal articles on the topic 'Coal mine wastewater'

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