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Journal articles on the topic 'Iron removing bacteria'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Tang, Yu Lan, Wei Bin Wu, Ya Ting He, Jin Xiang Fu, and Xiao Lan Wang. "Low-Temperature Domestication of an Iron and Manganese Oxidizing Bacteria." Advanced Materials Research 374-377 (October 2011): 826–30. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.826.

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Abstract.One superior iron and manganese bacteria were separated from the stable operation of porcelain granular BAF filters of removing iron, manganese and ammonia. The bacteria was domesticated at low temperature. By analyzing the sample water containing iron and manganese in the role of iron and manganese bacteria which was not domesticated and domesticated at different temperature, observing the Iron and manganese concentration with time going on, studying the bacteria’s removal of iron and manganese property and the domesticated effect. Studies show that: the selected bacteria with 1% bac

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Li, Jie, Rachel Nickel, Jiandong Wu, Francis Lin, Johan van Lierop, and Song Liu. "A new tool to attack biofilms: driving magnetic iron-oxide nanoparticles to disrupt the matrix." Nanoscale 11, no. 14 (2019): 6905–15. http://dx.doi.org/10.1039/c8nr09802f.

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Removing robust MRSA biofilms using magnetic nanoparticles (MNPs) under AC and DC magnetic field is demonstrated. Despite being non-toxic to planktonic bacteria, MNPs can bring damage to the extracellular matrix of biofilms and remove them from surfaces without inducing bacterial resistance.

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Ito, A., T. Takachi, J. Aizawa, and T. Umita. "Chemical and biological removal of arsenic from sewage sludge." Water Science and Technology 44, no. 10 (2001): 59–64. http://dx.doi.org/10.2166/wst.2001.0581.

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Chemical and biological leachings of As and metals from sewage sludge were carried out using a batch reactor under an aerobic condition. Addition of phosphate to the sludge was ineffective for the elution of As from the sludge at neutral pH. Akalization of the sludge to pH 11 eluted sufficient As, whereas it was ineffective for Al, Cd, Mn and Zn. Furthermore, the effectiveness of ferric sulfate and iron oxidizing bacteria was investigated under acidic conditions. The application of ferric iron and/or iron oxidizing bacteria eluted As from the sludge more effectively than that of sulfuric acid

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Wang, Han, Tianbei Wang, Weigang Wang, and Yue Yuan. "Enhancing Rural Surface Water Remediation with Iron–Carbon Microelectrolysis-Strengthened Ecological Floating Beds." Sustainability 16, no. 17 (2024): 7417. http://dx.doi.org/10.3390/su16177417.

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Ecological floating beds, with their compact footprint and mobility, offer a promising solution for sustainable surface water remediation in rural areas. However, low removal efficiency and instability still limit its application. In this study, iron–carbon-based fillers were integrated into ecological floating beds to investigate their impact and mechanisms in removing pollutants, including carbon, nitrogen, phosphorus, and heavy metals. Results indicate that all five fillers (activated carbon, iron–carbon fillers, sponge iron, activated carbon + iron–carbon fillers, and activated carbon + sp

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Teer, J. E., D. J. Leak, A. W. L. Dudeney, A. Narayanan, and D. C. Stuckey. "The treatment of iron oxalate leach liquors in a UASB with sulfate reduction." Water Science and Technology 36, no. 6-7 (1997): 383–90. http://dx.doi.org/10.2166/wst.1997.0614.

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The presence of small amounts of iron (&gt;0.013% Fe) in sand creates problems in the manufacture of high quality glass. Removal by hot sulphuric acid is possible, but creates environmental problems, and is costly. Hence organic acids such as oxalic have been investigated since they are effective in removing iron, and can be degraded anaerobically. The aim of this work was to identify key intermediates in the anaerobic degradation of oxalate in an upflow anaerobic sludge blanket reactor (UASB) which was removing iron from solution in the sulphide form, and to determine the bacterial specie

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Kvartenko, Oleksandr, Larysa Sabliy, Nataliya Kovalchuk, and Andriy Lysytsya. "The use of the biological method for treating iron containing underground waters." Journal of Water and Land Development 39, no. 1 (2018): 77–82. http://dx.doi.org/10.2478/jwld-2018-0061.

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AbstractThe use of the biological method is promising for treating underground waters from iron compounds. Iron bacteria used in the process are widely spread in weak acidic and neutral underground waters containing iron ions (II), dissolved carbon dioxide and minimum concentrations of oxygen. The relevant direction of present-day biotechnology is the use of iron bacteria for treating underground waters. The goal of this research is to compare the efficiency of using the biological method for treating underground iron containing weak acidic and neutral waters under different conditions. As the

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Hasan, Rana S., Alaa Nazar Al-Najim, Sawsan M. Alomari, and Ali M. Saadi. "A Review of Important Bacterial Siderophores and their Potential Applications." International Journal of Medical and All Body Health Research 5, no. 4 (2024): 168–77. https://doi.org/10.54660/ijmbhr.2024.5.4.168-177.

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Many environment have limited bioavailable iron, which leads to a variety of response strategies aimed at maintaining iron homeostasis Microorganisms, in particular, have specialized iron uptake system and frequently coordinate the synthesis and up take of iron with other cellular function like motility and biofilm formation. Microorganism produce and release low – molecular – weight compounds called siderophores in to the extracellular medium. these chelators have a high affinity and selectivity for Fe(III), making them a crucial component of an iron acquisition strategy. Sidrophores are ofte

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Qi, Bei Meng, Bei Jia Wang, Chen Guang Wu, and Yi Xing Yuan. "The Disinfection Efficacy of Chlorine on Sulfate-Reducing Bacteria and Iron Bacteria in Water Supply Systems." Applied Mechanics and Materials 316-317 (April 2013): 657–60. http://dx.doi.org/10.4028/www.scientific.net/amm.316-317.657.

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Sulfate reducing bacteria (SRB) and iron reducing bacteria (IRB) that widely exist in water supply networks are the main microorganisms leading to metal corrosion in pipelines. Chlorine is widely used in drinking water supply systems. The concentration of chlorine with SRB declined rapidly after 10 mins and reached 0 mg/L finally whereas it decreased more slowly with IRB. If the concentration of chlorine is lower than 0.2mg/L, IRB cannot be sterilized. It indicates that at the end of water pipes where the concentration of chlorine is required to be 0.05mg/L, chlorine is not effective since the

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Huang, Fa Ming, Shui Chun Xia, Xin Tong Xiao, Bin Hua Luo, Shi Bin Xia, and Wen Qi Gong. "Immobilization of Phosphorus-Dissolving Bacteria on Sawdusts for Removing Phosphorus in Iron Ores." Advanced Materials Research 343-344 (September 2011): 7–10. http://dx.doi.org/10.4028/www.scientific.net/amr.343-344.7.

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Nowadays, the immobilization of At.t is a research potential. The immobilization of At.t on the sawdust filler was discussed in this paper. The experimental results indicated that sawdusts, as the immobilization fillers, can provide a stable living microenvironment for At.t showing the favorable bioactivity and strong acid-producing capacity. Also, under the optimal conditions with the inoculums concentration 12.5%, sulphur dosage 1% (w/v), dissolved oxygen (DO) in the bioreactor above 6 mg/l, the conductivity, pH, and H+ in the bioreactor were 45.2 ms/cm，0.964, and 0.109 mol/l，respectively. I

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Watanabe, Shingo, and Tatsuo Iwasa. "Intracellular Distribution of Iron in the Cell of Magnetotactic Bacteria Inhibited the Biosynthesis of Magnetic Nano-Particles by Limiting the Iron Source." Advanced Materials Research 476-478 (February 2012): 1020–26. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.1020.

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Magnetotactic bacteria are the bacteria which synthesize nano-sized magnetic particles within their cell body. In the present study, the cells of a magnetotactic bacteria M. magnetotacticum MS-1 was fractionated and the iron amount of the cell fractions were measured. In order to study the relationship between the process of the biosynthesis of magnetosome and the intracellular transport of iron, MS-1 cells were cultured under iron limited culture conditions and the amount of iron in the cell fractions were compared with those under optimal culture conditions. The whole amount of iron was meas

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Pandur, Edina, Kitti Tamási, Ramóna Pap, Gergely Jánosa, and Katalin Sipos. "Distinct Effects of Escherichia coli,Pseudomonas aeruginosa and Staphylococcus aureus Cell Wall Component-Induced Inflammation on the Iron Metabolism of THP-1 Cells." International Journal of Molecular Sciences 22, no. 3 (2021): 1497. http://dx.doi.org/10.3390/ijms22031497.

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Macrophages are essential immune cells of the innate immune system. They participate in the development and regulation of inflammation. Macrophages play a fundamental role in fighting against bacterial infections by phagocytosis of bacteria, and they also have a specific role in immunomodulation by secreting pro-inflammatory cytokines. In bacterial infection, macrophages decrease the serum iron concentration by removing iron from the blood, acting as one of the most important regulatory cells of iron homeostasis. We examined whether the Gram-positive and Gram-negative cell wall components from

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Terwilliger, Austen, Michelle C. Swick, Kathryn J. Pflughoeft, et al. "Bacillus anthracis Overcomes an Amino Acid Auxotrophy by Cleaving Host Serum Proteins." Journal of Bacteriology 197, no. 14 (2015): 2400–2411. http://dx.doi.org/10.1128/jb.00073-15.

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ABSTRACTBacteria sustain an infection by acquiring nutrients from the host to support replication. The host sequesters these nutrients as a growth-restricting strategy, a concept termed “nutritional immunity.” Historically, the study of nutritional immunity has centered on iron uptake because many bacteria target hemoglobin, an abundant circulating protein, as an iron source. Left unresolved are the mechanisms that bacteria use to attain other nutrients from host sources, including amino acids. We employed a novel medium designed to mimic the chemical composition of human serum, and we show he

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Kumaraswamy, Rajkumari, Udo van Dongen, J. Gijs Kuenen, Wiebe Abma, Mark C. M. van Loosdrecht, and Gerard Muyzer. "Characterization of Microbial Communities Removing Nitrogen Oxides from Flue Gas: the BioDeNOx Process." Applied and Environmental Microbiology 71, no. 10 (2005): 6345–52. http://dx.doi.org/10.1128/aem.71.10.6345-6352.2005.

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ABSTRACT BioDeNOx is an integrated physicochemical and biological process for the removal of nitrogen oxides (NOx) from flue gases. In this process, the flue gas is purged through a scrubber containing a solution of Fe(II)EDTA2−, which binds the NOx to form an Fe(II)EDTA·NO2− complex. Subsequently, this complex is reduced in the bioreactor to dinitrogen by microbial denitrification. Fe(II)EDTA2−, which is oxidized to Fe(III)EDTA− by oxygen in the flue gas, is regenerated by microbial iron reduction. In this study, the microbial communities of both lab- and pilot-scale reactors were studied usi

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AMulla, Abdulaziz Abdulrahman, Osama Saber, Mohamed Farouk Ezzeldin, Mahmoud Mohamed Berekaa, and Waleed I. M. El-Azab. "Dual-Functional Nanostructures for Purification of Water in Severe Conditions from Heavy Metals and E. coli Bacteria." Water 14, no. 19 (2022): 3010. http://dx.doi.org/10.3390/w14193010.

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Because of industrial water, many groundwater sources and other water bodies have a strongly acidic medium. Increased bacterial resistance against multiple antibiotics is one of the main challenges for the scientific society, especially those commonly found in wastewater. Special requirements and materials are needed to work with these severe conditions and treat this kind of water. In this trend, nanolayered structures were prepared and modified in different ways to obtain an optimum material for removing different kinds of heavy metals from water in severe conditions, alongside purifying wat

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Friedrich, Bernhard, Julia Eichermüller, Christian Bogdan, et al. "Biomimetic Magnetic Particles for the Removal of Gram-Positive Bacteria and Lipoteichoic Acid." Pharmaceutics 14, no. 11 (2022): 2356. http://dx.doi.org/10.3390/pharmaceutics14112356.

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Gram+ bacteria are very common in clinical medicine and responsible for a large number of infectious diseases. For example, Gram+ bacteria play a major role in causing bloodstream infections and sepsis. Therefore, the detection of Gram+ bacteria is of great importance for the diagnosis and treatment of infectious diseases. Furthermore, these bacteria are often present in biofilms that cover implants. Recent research work has mainly focused on the biologic activity and removal of Gram-negative bacteria or bacterial components such as lipopolysaccharides (LPS). In contrast, the effects of lipote

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Shrivastava, Karuna, and Biswajit Pramanik. "Physiognomy and Antibacterial Activity of Mycosynthesized Iron Nanoparticles from Penicillium critinum Thom, an Arsenic Removing Fungus." International Journal of Pharmaceutical Sciences and Nanotechnology 14, no. 1 (2021): 5287–96. http://dx.doi.org/10.37285/ijpsn.2021.14.1.4.

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Nanotechnology is well established and an essential field of material science research due to production of ultra smaller particle size with distinctive surface properties. The fungi are ubiquitous in nature and versatile in growth and metal tolerance ability. The present study reveals a positive relationship between arsenic metal removing ability of an aquatic fungus isolated from arsenic contaminated ground water and its potential for the synthesis of iron oxide (Fe2O3) nanoparticles. The mycobiosynthesis of iron nanoparticles (Fe-NPs) employing a fungus named Penicillium citrinum is being f

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James, Sarah, and Edith Joseph. "Microbial-Driven Stabilisation of Archaeological Iron Artefacts." Corrosion and Materials Degradation 2, no. 2 (2021): 274–92. http://dx.doi.org/10.3390/cmd2020015.

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The instability of iron artefacts is rooted in salt contamination during burial and damages associated with exposure to alternative oxygen levels and high relative humidity once excavated. While a combination of chemical and mechanical treatments is utilised to remove the harmful ions (chlorides, sulphur species) and excess bulky corrosion products, these methods can be hazardous for conservation staff’s health, have limited success, or require extensive treatment times. Bio-based treatments provide a potentially greener alternative for removing damaging corrosion and creating biogenic mineral

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18

Ghouil, Boudjemaa, Zineb Khebli, Ferhat Bouzerara, et al. "Preparation and characterization of low-cost ceramic microfiltration membranes for water treatment." Processing and Application of Ceramics 18, no. 4 (2024): 405–13. https://doi.org/10.2298/pac2404405g.

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This work presents the preparation of microfiltration (MF) membranes deposited on highly porous supports tailored for microfiltration applications. The supports were prepared from local Algerian clays and calcium carbonate, selected for their abundant availability. Subsequently, these supports underwent coating with microfiltration membrane using the slip casting method employing the same clay powder. The resulting membrane, sintered at 1100?C, exhibited desirable attributes including a thickness of approximately 27 ?m and an average pore size (APS) value of about 0.42 ?m, coupled with notable

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Tlčíková, Marcela, Hana Horváthová, Katarína Dercová, et al. "Plant-Based Substrates for the Production of Iron Bionanoparticles (Fe-BNPs) and Application in PCB Degradation with Bacterial Strains." Processes 12, no. 8 (2024): 1695. http://dx.doi.org/10.3390/pr12081695.

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Removing polychlorinated biphenyls (PCBs) from the environment is an important process for the protection of biota. This work examines three different approaches to the degradation of such contaminants. The first involves the use of iron bionanoparticles (Fe-BNPs) prepared through green synthesis from selected plant matrices. The second approach entails the use of the bacteria Stenotrophomonas maltophilia (SM) and Ochrobactrum anthropi (OA) isolated from a PCB-contaminated area, Strážsky canal, located in the Slovak republic, which receives efflux of canal from Chemko Strážske plant, a former

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Rava, E., and E. Chirwa. "Effect of carrier fill ratio on biofilm properties and performance of a hybrid fixed-film bioreactor treating coal gasification wastewater for the removal of COD, phenols and ammonia-nitrogen." Water Science and Technology 73, no. 10 (2016): 2461–67. http://dx.doi.org/10.2166/wst.2016.108.

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The purpose of this study was to determine the effect different biofilm carrier filling ratios would have on biofilm morphology and activity and bacterial diversity in a hybrid fixed-film bioreactor treating high strength coal gasification wastewater (CGWW) for the removal of chemical oxygen demand (COD), phenols and ammonia-nitrogen. Results showed that a carrier fill of 70% formed a ‘compact’ biofilm, a 50% fill formed a ‘rippling’ biofilm and a 30% fill formed a ‘porous’ biofilm. The highest microbial activity was obtained with a 50% carrier fill supporting a relatively thin biofilm. The hi

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Yang, Jianwei, Xiangpeng Tan, Muhammad Shaaban, Yajun Cai, Buyun Wang, and Qi’an Peng. "Remediation of Cr(VI)-Contaminated Soil by Biochar-Supported Nanoscale Zero-Valent Iron and the Consequences for Indigenous Microbial Communities." Nanomaterials 12, no. 19 (2022): 3541. http://dx.doi.org/10.3390/nano12193541.

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Biochar/nano-zero-valent iron (BC-nZVI) composites are currently of great interest as an efficient remediation material for contaminated soil, but their potential to remediate Cr-contaminated soils and effect on soil microecology is unclear. The purpose of this study was to investigate the effect of BC-nZVI composites on the removal of Cr(VI) from soil, and indigenous microbial diversity and community composition. The results showed that after 15 days of remediation with 10 g/kg of BC-nZVI, 86.55% of Cr(VI) was removed from the soil. The remediation of the Cr-contaminated soil with BC-nZVI res

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Cai, Yanan, Kun Yang, Chaochao Qiu, Yunze Bi, Bowen Tian, and Xuejun Bi. "A Review of Manganese-Oxidizing Bacteria (MnOB): Applications, Future Concerns, and Challenges." International Journal of Environmental Research and Public Health 20, no. 2 (2023): 1272. http://dx.doi.org/10.3390/ijerph20021272.

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Groundwater serving as a drinking water resource usually contains manganese ions (Mn2+) that exceed drinking standards. Based on the Mn biogeochemical cycle at the hydrosphere scale, bioprocesses consisting of aeration, biofiltration, and disinfection are well known as a cost-effective and environmentally friendly ecotechnology for removing Mn2+. The design of aeration and biofiltration units, which are critical components, is significantly influenced by coexisting iron and ammonia in groundwater; however, there is no unified standard for optimizing bioprocess operation. In addition to the gro

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KNABEL, S. J., H. W. WALKER, and P. A. HARTMAN. "Inhibition of Aspergillus flavus and Selected Gram-positive Bacteria by Chelation of Essential Metal Cations by Polyphosphates." Journal of Food Protection 54, no. 5 (1991): 360–65. http://dx.doi.org/10.4315/0362-028x-54.5.360.

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A simple well-plate technique was utilized to determine the effect of various metals on the growth of microorganisms in media containing different polyphosphates. Aspergillus flavus and four gram-positive bacteria were completely inhibited by media containing 1% of various alkaline polyphosphates, whereas four gram-negative bacteria were not. Significant differences were observed between the type of polyphosphate added, the type of metal added, and the species of gram-positive bacterium inhibited. The addition of Mg2+ stimulated growth of A. flavus and Bacillus cereus in the presence of tetras

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Liu, Zexiang, Yong Chen, Zhihong Xu, et al. "Surface Modification of Polyurethane Sponge with Zeolite and Zero-Valent Iron Promotes Short-Cut Nitrification." Polymers 16, no. 11 (2024): 1506. http://dx.doi.org/10.3390/polym16111506.

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Partial nitrification-Anammox (PN-A) is a cost-effective, environmentally friendly, and efficient method for removing ammonia (NH4+-N) pollutants from water. However, the limited accumulation of nitrite (NO2−-N) represents a bottleneck in the development of PN-A processes. To address this issue, this study developed a composite carrier loaded with nano zero-valent iron (nZVI) and zeolite to enhance NO2−-N accumulation during short-cut nitrification. The modified composite carrier revealed electropositive, hydrophilicity, and surface roughness. These surface characteristics correlate positively

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Gobin, J., and M. A. Horwitz. "Exochelins of Mycobacterium tuberculosis remove iron from human iron-binding proteins and donate iron to mycobactins in the M. tuberculosis cell wall." Journal of Experimental Medicine 183, no. 4 (1996): 1527–32. http://dx.doi.org/10.1084/jem.183.4.1527.

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To multiply and cause disease in the host, Mycobacterium tuberculosis must acquire iron from the extracellular environment at sites of replication. To do so, the bacterium releases high-affinity iron-binding siderophores called exochelins. In previous studies, we have described the purification and characterization of the exochelin family of molecules. These molecules share a common core structure with another type of high-affinity iron-binding molecule located in the cell wall of M. tuberculosis: the mycobactins. The water-soluble exochelins differ from each other and from water insoluble myc

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Leng, Bovathanak, May Phue Wai, Leanggek Menh, Chheng Im Si, and Rina Heu. "Groundwater Purification Using Bio-Sand Filter Modified with Iron Oxide-Coated Sand and Activated Carbon." Key Engineering Materials 972 (December 22, 2023): 79–88. http://dx.doi.org/10.4028/p-qern6o.

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Groundwater is the most used natural resource which serves different diverse purposes and alternative water supply for households mainly in rural areas. However, it is polluted by contaminants such as heavy metals, total hardness and coliform bacteria. One such promising water treatment technology for households in rural areas is the Bio-sand Filter (BSF) because of its low cost and efficient removal of contaminants. Although BSF is efficient to remove contaminants, there is still needed to improve the flow rate and the performance of removing pollutants from groundwater. Therefore, this study

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Journal, Baghdad Science. "Comparison the effectiveness of using a magnetic field to control theColi phages isolated from rivulet water with water-treatment using magnetic field added iron filings." Baghdad Science Journal 11, no. 3 (2014): 1361–66. http://dx.doi.org/10.21123/bsj.11.3.1361-1366.

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The present study aimed to use the magnetic field and nanotechnology in the field of water purification, which slots offering high efficiency to the possibility of removing biological contaminants such as viruses and bacteria rather than the use of chemical and physical transactions such as chlorine and bromine, and ultraviolet light and boiling and sedimentation and distillation, ozone and others that have a direct negative impact on human safety and the environment. Where they were investigating the presence in water samples under study Coli phages using Single agar layer method and then tre

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Rzoki, Nada S., Zina H. Shehab, and Aliaa J. Kasem. "Comparison the effectiveness of using a magnetic field to control theColi phages isolated from rivulet water with water-treatment using magnetic field added iron filings." Baghdad Science Journal 11, no. 3 (2014): 1361–66. http://dx.doi.org/10.21123/bsj.2014.11.3.1361-1366.

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The present study aimed to use the magnetic field and nanotechnology in the field of water purification, which slots offering high efficiency to the possibility of removing biological contaminants such as viruses and bacteria rather than the use of chemical and physical transactions such as chlorine and bromine, and ultraviolet light and boiling and sedimentation and distillation, ozone and others that have a direct negative impact on human safety and the environment. Where they were investigating the presence in water samples under study Coli phages using Single agar layer method and then tre

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Schulze-Makuch, Dirk, Robert S. Bowman, Suresh D. Pillai, and Huade Guan. "Field Evaluation of the Effectiveness of Surfactant Modified Zeolite and Iron-Oxide-Coated Sand for Removing Viruses and Bacteria from Ground Water." Groundwater Monitoring & Remediation 23, no. 4 (2003): 68–74. http://dx.doi.org/10.1111/j.1745-6592.2003.tb00696.x.

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Amirbekov, Aday, Aigerim Mamirova, Alena Sevcu, Roman Spanek, and Pavel Hrabak. "HCH Removal in a Biochar-Amended Biofilter." Water 13, no. 23 (2021): 3396. http://dx.doi.org/10.3390/w13233396.

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This study evaluated the efficiency of two biofilter systems, with and without biochar chambers installed, at degrading and removing HCH and its isomers in natural drainage water. The biochar biofilter proved to be 96% efficient at cleaning HCH and its transformation products from drainage water, a significant improvement over classic biofilter that remove, on average, 68% of HCH. Although iron- and sulfur-oxidizing bacteria, such as Gallionella and Sulfuricurvum, were dominant in the biochar bed outflows, they were absent in sediments, which were rich in Simplicispira, Rhodoluna, Rhodoferax,

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Ikhlaq, Amir, Rida Fatima, Umair Yaqub Qazi, et al. "Combined Iron-Loaded Zeolites and Ozone-Based Process for the Purification of Drinking Water in a Novel Hybrid Reactor: Removal of Faecal Coliforms and Arsenic." Catalysts 11, no. 3 (2021): 373. http://dx.doi.org/10.3390/catal11030373.

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This study was carried out to provide a novel solution to treat drinking water at household levels, specifically removing arsenic (As) and faecal coliforms (microbes). In the current investigation, a synergistic iron-loaded zeolites and ozonation process (O3/Fe-ZA) was used for the first time in a modified batch reactor to remove coliform bacteria and arsenic in tap water. Moreover, the study utilizes the human health risk assessment model to confirm the health risk due to As intake in drinking water. The risk assessment study revealed a health risk threat among the residents suffering from th

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Zhang, Yongji, Huimin Hou, Mengyu Qiu, and Lingling Zhou. "Control of Loose Deposits in a Simulated Drinking Water Distribution System Using Ultrafiltration." Water 15, no. 12 (2023): 2210. http://dx.doi.org/10.3390/w15122210.

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Loose deposits on water supply pipe walls easily fall off and may affect the safety of the drinking water supply, and the control of them has been a hot research issue in recent years. In this research, we used two simulated pipeline test reactors to systematically study the formation and shedding pattern of loose sediment on the pipeline, analyze its characteristics, and explore the control role of the ultrafiltration process on loose sediment in the water supply pipeline network. The results showed that the loose deposits adhered to the pipe reactor fed by filtered water formed slower than d

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Dlamini, Nkosinathi Goodman, Albertus Kotze Basson, and Viswanadha Srirama Rajasekhar Pullabhotla. "A Comparative Study between Bimetallic Iron@copper Nanoparticles with Iron and Copper Nanoparticles Synthesized Using a Bioflocculant: Their Applications and Biosafety." Processes 8, no. 9 (2020): 1125. http://dx.doi.org/10.3390/pr8091125.

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Nanotechnology addresses numerous environmental problems such as wastewater treatment. Ground water, surface water and wastewater that is contaminated by toxic organic, inorganic solutes and pathogenic microorganisms can now be treated through the application of nanotechnology. The study reports iron@copper (Fe@Cu) nanoparticles, iron nanoparticles (FeNPs) and copper nanoparticles (CuNPs) synthesized using a bioflocculant in a green approach technique. Characterization of the as-synthesized materials was achieved using analytical techniques such as Fourier transform-Infrared spectroscopy (FT-I

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Ren, Shan, Pei Song, Haichun Cheng, Chao Liu, and Rongsheng Chen. "Enhanced Treatment of Decentralized Domestic Sewage Using Gravity-Flow Multi-Soil-Layering Systems Coupled with Iron-Carbon Microelectrolysis." Sustainability 14, no. 19 (2022): 12892. http://dx.doi.org/10.3390/su141912892.

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Soil-based decentralized treatment technology has become increasingly popular as an ideal solution for water pollution control in rural areas. It is very necessary to optimize the removal mechanisms and performance of such technologies on rural domestic sewage treatment. This was the first study of a gravity-flow multi-soil-layering (MSL) system coupled with iron-carbon microelectrolysis (ICM). Influent COD/TN (C/N) ratio and bottommost soil mixture block (SMB) submersion were selected as the operating factors relevant to the ICM in MSL systems. Such two key factors were investigated in the fa

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Tusher, Tanmoy Roy, Takuya Shimizu, Chihiro Inoue, and Mei-Fang Chien. "Isolation and Characterization of Novel Bacteria Capable of Degrading 1,4-Dioxane in the Presence of Diverse Co-Occurring Compounds." Microorganisms 9, no. 5 (2021): 887. http://dx.doi.org/10.3390/microorganisms9050887.

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Biodegradation is found to be a promising, cost-effective and eco-friendly option for the treatment of industrial wastewater contaminated by 1,4-dioxane (1,4-D), a highly stable synthetic chemical and probable human carcinogen. This study aimed to isolate, identify, and characterize metabolic 1,4-D-degrading bacteria from a stable 1,4-D-degrading microbial consortium. Three bacterial strains (designated as strains TS28, TS32, and TS43) capable of degrading 1,4-D as a sole carbon and energy source were isolated and identified as Gram-positive Pseudonocardia sp. (TS28) and Gram-negative Dokdonel

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Hussain, H. M., M. B. Mahmood, and L. A. Yaaqoob. "Evolution of the biological effect of synthesized zinc-iron oxides nanoparticles on organic pollutants in drinking water." Iraqi Journal of Chemical and Petroleum Engineering 26, no. 1 (2025): 121–27. https://doi.org/10.31699/ijcpe.2025.1.12.

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This study aimed to explain the biosynthesis process of Zinc and Iron oxide nanoparticles (Zn- O+ Fe- ONPs) using an extracellular enzyme, which in turn produced from particular environmental bacteria isolates Escherichia coli a stabilizing and reducing agent. Biosynthesized (ZnO+FeO) nanoparticles have presented many applications such as catalysis, biosensing, anticancer, and biomedical, etc. The optimum condition for Zn-O and Fe-O biosynthesis was characterized through several techniques such as UV-Vis, AFM, XRD, FT-IR, and FE-SEM. In particular, a cut-off phenomenon of the biological synthe

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Mohd Salleh, Mohamad Zulhilmi, and Khomaizon A. K. Pahirulzaman. "Citrus scented natural essential oils for crystal salt deodorant." Journal of Tropical Resources and Sustainable Science (JTRSS) 9, no. 1 (2021): 43–47. http://dx.doi.org/10.47253/jtrss.v9i1.708.

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Alum natural mineral salt is the world's leading crystal deodorant which works in removing unpleasant body smell. Some other products attempt to block the sweat pores with harmful chemicals such as aluminum chlorohydrates or aluminum zirconium. However, crystal is hypoallergenic deodorant that is healthy, safe, and effective in inhibiting odor formation on the axillary. The light scent infused with natural essential oils might enhance the properties of the crystal deodorant and its antimicrobial activity in fighting against body odor bacteria. This study was conducted to evaluate the potential

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Chen, Junyi, Yuchi Luo, Junda Zhang, et al. "In Situ Remediation of Combined Ammonia and Nitrate Nitrogen Contamination Using Zero-Valent Iron-Enhanced Microorganisms in Acidic Groundwater: A Laboratory and Pilot-Scale Study." Processes 12, no. 12 (2024): 2768. https://doi.org/10.3390/pr12122768.

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In acidic groundwater, effectively removing both ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3−-N) poses a challenge. This study focused on studying the removal of NH4+-N and NO3−-N combined contaminations by zero-valent iron (ZVI) combined with microbial agents in both laboratory and field pilot-scale studies. Laboratory experiments showed that ZVI could reduce the denitrification stage from 15 days to 10 days by increasing solution pH and improving NO3−-N reduction efficiency. In a field pilot test (at Qingyuan, Guangdong Province, China), high-pressure injection pumps were used to inj

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Santaolalla, Arrate, Piet N. L. Lens, Astrid Barona, Naiara Rojo, Ainhoa Ocio, and Gorka Gallastegui. "Metal Extraction and Recovery from Mobile Phone PCBs by a Combination of Bioleaching and Precipitation Processes." Minerals 11, no. 9 (2021): 1004. http://dx.doi.org/10.3390/min11091004.

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Bearing in mind the metal rich composition of printed circuit boards (PCBs), this material represents a secondary source of valuable metals and offers an entrepreneurial opportunity in the metal sales market. Based on the ability of microorganisms to regenerate and produce the chemical oxidants that are responsible for metal leaching, bioleaching has become an efficient and affordable alternative to conventional metal recycling technologies, although further research is still necessary before industrial implementation. This study focuses on the recovery of metals contained in mobile phone PCBs

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Bruno-Bárcena, Jose M., Jason M. Andrus, Stephen L. Libby, Todd R. Klaenhammer, and Hosni M. Hassan. "Expression of a Heterologous Manganese Superoxide Dismutase Gene in Intestinal Lactobacilli Provides Protection against Hydrogen Peroxide Toxicity." Applied and Environmental Microbiology 70, no. 8 (2004): 4702–10. http://dx.doi.org/10.1128/aem.70.8.4702-4710.2004.

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ABSTRACT In living organisms, exposure to oxygen provokes oxidative stress. A widespread mechanism for protection against oxidative stress is provided by the antioxidant enzymes: superoxide dismutases (SODs) and hydroperoxidases. Generally, these enzymes are not present in Lactobacillus spp. In this study, we examined the potential advantages of providing a heterologous SOD to some of the intestinal lactobacilli. Thus, the gene encoding the manganese-containing SOD (sodA) was cloned from Streptococcus thermophilus AO54 and expressed in four intestinal lactobacilli. A 1.2-kb PCR product contain

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Torres, Norah Nadia Sanchez, Ivonete Borne, Sara Angélica Santos de Souza, Jiam Pires Frigo, and Oswaldo Hideo Ando Junior. "Alternative Water Treatment System Using Ionization and Ultraviolet Radiation for Isolated Communities." Revista de Gestão Social e Ambiental 19, no. 1 (2025): e010890. https://doi.org/10.24857/rgsa.v19n1-085.

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Objective: This paper proposes an alternative water treatment system for isolated communities in the Amazon, such as riverside, Indigenous, and Quilombola populations, using copper ionization and ultraviolet radiation to purify water in autonomous stations with a capacity of 1m³/day. Theoretical: Despite being home to one of the largest freshwater reserves in the world, much of the Amazon's population faces significant challenges in accessing potable water due to the lack of basic sanitation infrastructure. Waterborne diseases, caused by consuming contaminated water, severely impact public hea

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Mirza, Shaper, Landon Wilson, William H. Benjamin, et al. "Serine Protease PrtA from Streptococcus pneumoniae Plays a Role in the Killing of S. pneumoniae by Apolactoferrin." Infection and Immunity 79, no. 6 (2011): 2440–50. http://dx.doi.org/10.1128/iai.00489-10.

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ABSTRACTIt is known that apolactoferrin, the iron-free form of human lactoferrin, can kill many species of bacteria, includingStreptococcus pneumoniae. Lactoferricin, an N-terminal peptide of apolactoferrin, and fragments of it are even more bactericidal than apolactoferrin. In this study we found that apolactoferrin must be cleaved by a serine protease in order for it to kill pneumococci. The serine protease inhibitors were able to block killing by apolactoferrin but did not block killing by a lactoferrin-derived peptide. Thus, the killing of pneumococci by apolactoferrin appears to require a

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Mann, Guravtar Singh, and Ritesh Anil Mudage. "Sustainable Water Remediation using Nanotechnology: A Critical Review." Journal of Advanced Research in Micro and Nano Engineering 31, no. 1 (2025): 23–39. https://doi.org/10.37934/armne.31.1.2339.

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This paper aims to provide a review of available published literature in which nanotechnology has the potential to completely change the way water is treated by offering more effective and affordable ways to remove impurities. The purpose of this article is to summarize the research done to date, to highlight successes in the field, and to identify opportunities nanotechnology could bring to science and technology for water remediation. We investigate the suitability of nanoparticles in water treatment applications, emphasizing their high surface area-to-volume ratio and reactivity. The review

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Yahaghi, Javad, and Alireza Bazargan. "Application of Radiofrequency for Decolorization, Floc Formation, and Microorganism Inactivation." Tropical Aquatic and Soil Pollution 2, no. 1 (2022): 34–44. http://dx.doi.org/10.53623/tasp.v2i1.54.

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The use of radio frequency for water and wastewater treatment is a topic that has not been extensively explored. In this study, the effect of a HydroFlow S38 device (Hydropath Holdigs) inducing 150 KHz radio frequency (RF) has been investigated, removing color, forming coagulant flocs and their sedimentation, and the removal of bacteria. Experiments were first conducted on synthetic samples, and then on landfill leachate from the Aradkooh waste processing and landfilling complex (Kahrizak) in Tehran, Iran. The results of the experiments showed that RF had little to no effect on de-coloring in

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Cranford-Smith, Tamar, Mohammed Jamshad, Mark Jeeves, et al. "Iron is a ligand of SecA-like metal-binding domains in vivo." Journal of Biological Chemistry 295, no. 21 (2020): 7516–28. http://dx.doi.org/10.1074/jbc.ra120.012611.

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The ATPase SecA is an essential component of the bacterial Sec machinery, which transports proteins across the cytoplasmic membrane. Most SecA proteins contain a long C-terminal tail (CTT). In Escherichia coli, the CTT contains a structurally flexible linker domain and a small metal-binding domain (MBD). The MBD coordinates zinc via a conserved cysteine-containing motif and binds to SecB and ribosomes. In this study, we screened a high-density transposon library for mutants that affect the susceptibility of E. coli to sodium azide, which inhibits SecA-mediated translocation. Results from seque

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Nugraha, H. T., A. Rinanti, A. Wijayanti, and S. Aphirta. "Bioremediation of iron and manganese heavy metal polluted soil by mixed culture of Acetobacter tropicalis and Lactobacillus fermentum." IOP Conference Series: Earth and Environmental Science 1203, no. 1 (2023): 012006. http://dx.doi.org/10.1088/1755-1315/1203/1/012006.

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Abstract The research aim was to determine the growth response of mixed cultures of Acetobacter tropicalis and Lactobacillus fermentum in Stone Mineral Salt solutions (SMSs) and soil containing Acid Mine Drainage (AMD) in controlled batches. The first stage was the cultivation in SMSs followed by preparation of the pollutant source and sensitivity test. The second phase was the removal of heavy metals from iron and manganese in AMD by mixed bacterial cultures in SMSs with the contact time for 48, 96, 144, 192 hours, and pH 2, 3, 5, 7. The third stage was the removal on soil media with the same

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Hussain Mian, Abrar. "Isolation And Characterization Of Biosurfactant Producing Bacteria From Different Environmental Soil Samples." Journal of Toxicology and Environmental Sciences 1, no. 1 (2021): 36–47. http://dx.doi.org/10.55124/jtes.v1i1.133.

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Biosurfactants are natural substances produced by several bacterial and fungal organisms that are amphiphilic and are extracellular (a part of the cell membrane). Biosurfactants can reduce the stress between solids and liquids on the surface and at the end. Biosurfactants have several properties, i.e. they are stable, less harmful, as well as readily degradable, and extremely eco-friendly. Biosurfactants also have a wide range of industrial uses because they are a versatile category of chemical substances. The principal justification for conducting such research was the isolation of possible b

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Yang, Jie, Li Yang Zhou, and Hui Li. "Synergistic effects of acclimated bacterial community and zero valent iron for removing 1,1,1-trichloroethane and 1,4-dioxane co-contaminants in groundwater." Journal of Chemical Technology & Biotechnology 93, no. 8 (2018): 2244–51. http://dx.doi.org/10.1002/jctb.5567.

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Corsini, Anna, Lucia Cavalca, Gerard Muyzer, and Patrizia Zaccheo. "Effectiveness of various sorbents and biological oxidation in the removal of arsenic species from groundwater." Environmental Chemistry 11, no. 5 (2014): 558. http://dx.doi.org/10.1071/en13210.

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Environmental context Arsenic contamination of aquifers is a worldwide public health concern and several technologies have been developed to reduce the arsenic content of groundwater. We investigated the efficiency of various materials for arsenic removal from groundwater and found that iron-based sorbents have great affinity for arsenic even if groundwater composition can depress their ability to bind arsenic. Moreover, we showed that the use of microorganisms can enhance the removal of arsenic from groundwater. Abstract The AsIII and AsV adsorption capacity of biochar, chabazite, ferritin-ba

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Stokes, Russell H., Jonathan S. Oakhill, Christopher L. Joannou, Andrew R. Gorringe, and Robert W. Evans. "Meningococcal Transferrin-Binding Proteins A and B Show Cooperation in Their Binding Kinetics for Human Transferrin." Infection and Immunity 73, no. 2 (2005): 944–52. http://dx.doi.org/10.1128/iai.73.2.944-952.2005.

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ABSTRACT Neisseria meningitidis, a causative agent of bacterial meningitis and septicemia, obtains transferrin-bound iron by expressing two outer membrane-located transferrin-binding proteins, TbpA and TbpB. A novel system was developed to investigate the interaction between Tbps and human transferrin. Copurified TbpA-TbpB, recombined TbpA-TbpB, and individual TbpA and TbpB were reconstituted into liposomes and fused onto an HPA chip (BIAcore). All preparations formed stable monolayers, which, with the exception of TbpB, could be regenerated by removing bound transferrin. The ligand binding pr

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