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Journal articles on the topic 'Soil absorption and adsorption – Rwanda'

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Published: 4 June 2021

Last updated: 10 February 2022

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1

Arocha, Marco A., Ben J. McCoy, and Alan P. Jackman. "VOC immobilization in soil by adsorption, absorption and encapsulation." Journal of Hazardous Materials 51, no. 1-3 (1996): 131–49. http://dx.doi.org/10.1016/s0304-3894(96)01824-9.

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2

Kellman, Martin. "Nutrient retention by tropical ecosystems: soil adsorption and plant absorption as synergistic processes." Journal of Tropical Ecology 18, no. 6 (2002): 877–95. http://dx.doi.org/10.1017/s0266467402002572.

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Laboratory and growth-chamber experiments were used to evaluate whether there was evidence for nutrient retention by tropical terrestrial ecosystems being a two-stage process involving first soil adsorption and then plant absorption. Quartz sand with and without Fe and Al oxide coatings were treated with nutrient solution, then subjected to a leaching regime that simulated early wet-season conditions at a tropical location. Nutrient cations applied were rapidly lost in the initial leaches from quartz sand without oxide coatings, but showed a more gradual loss from oxide-coated sand, indicating

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3

Mei, Ying, Hang Zhou, Xiao-Han Zhu, et al. "Isothermal adsorption characteristics of bioretention media for fecal Escherichia coli." Thermal Science 24, no. 4 (2020): 2427–36. http://dx.doi.org/10.2298/tsci2004427m.

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Rainfall runoff contains a huge number of pathogenic bacteria that seriously deteriorate water quality. Bioretention is an effective approach to removal of pathogenic bacteria from rainwater. This study uses sandy soil, fly ash, slag, sandy soil+5% fly ash, and sandy soil+5% slag as media to evaluate the adsorption of fecal Escherichia coli. The mechanisms of the five media conform to the Langmuir?s isotherm adsorption equation, and a pseudo-first-order kinetic model is adopted to reveal the absorption kinetics.

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4

Nie, Zhaojun, Jinfeng Li, Haiyang Liu, et al. "Adsorption kinetic characteristics of molybdenum in yellow-brown soil in response to pH and phosphate." Open Chemistry 18, no. 1 (2020): 663–68. http://dx.doi.org/10.1515/chem-2020-0501.

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AbstractMolybdenum (Mo) adsorption by acidic yellow-brown soil was investigated as a function of a pH (1–13) and the equilibrium of P solution (0, 3.1, and 31 mg L−1) concentration. Mo adsorption by acidic yellow-brown soil increased within the pH range from 1 to 4. Above pH 4, Mo adsorption decreases with an increase in pH. The maximum adsorption was found between pH 2 and 4. Competitive adsorption experiments showed that the equilibrium sorption data fitted into Langmuir and Freundlich isotherms. The sorption data of Mo on the acidic yellow-brown soil fitted well with the Langmuir isotherm m

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5

Pham, Tien Duc, Hoang Hiep Nguyen, Ngoc Viet Nguyen, et al. "Adsorptive Removal of Copper by Using Surfactant Modified Laterite Soil." Journal of Chemistry 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/1986071.

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Removal of copper ion (Cu2+) by using surfactant modified laterite (SML) was investigated in the present study. Characterizations of laterite were examined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), inductively coupled plasma mass spectrometry (ICP-MS), and total carbon analysis. The optimum conditions for removal of Cu2+ by adsorption using SML were systematically studied and found as pH 6, contact time 90 min, adsorbent dosage 5 mg/mL, and ionic strength 10 mM NaCl. The equilibrium concentration of copper ions was measured by flame atomic absorption spectrom

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6

Bairwa, Rajendra, Mamta ., Nintu Mandal, Nilanjan Chattopadhyaya, and Neeraj Bagoria. "Adsorption and Desorption of zinc in soil and its implication." International Journal of Agricultural Invention 3, no. 02 (2018): 191–202. http://dx.doi.org/10.46492/ijai/2018.3.2.17.

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Zn availability mostly regulated through adsorption-desorption on soil (or adsorbent). Fly ash (FA) application influence on zinc adsorption-desorption in recommended chemical fertilizer (RDF) and farmyard manure (FYM) treatments of acidic Inceptisols of Assam. Zinc adsorption was better explained by Freundlich over the Langmuir adsorption equation. Adsorption was greatest in the treatment receiving FA only at 15 t ha−1 and least in the treatment receiving RDF 50 percent + FYM 5 t ha−1 + FA 5 t ha−1. Ni and Zn co-sorption to aluminium oxides (γ-Al2O3) in binary-sorbate systems were compared to

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7

Rahmayanti, Maya, Guliston Abdillah, Sri Juari Santosa, and Sutarno Sutarno. "Application of Humic Acid Isolated From Kalimatan Peat Soil Modifying Magnetite for Recovery of Gold." Jurnal Bahan Alam Terbarukan 8, no. 2 (2020): 77–83. http://dx.doi.org/10.15294/jbat.v8i2.20392.

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Humic acid modifying magnetite particles (Mag-HA) were developed for recovery of gold from chloride solution (HAuCl4). The Mag-HA particles were prepared by co-precipitation procedure with Fe(III) and Fe(II) chloride salts, sodium hydroxide, and humic acid. FTIR characterization for Mag-HA after modification indicated the presence of the specific absorption for functional groups of humic acid and Fe-O bonds, though with lower intensity. The Mag-HA particles exhibited a typical superparamagnetic characteristic with a saturation magnetization of 66.99 emu/g. The Mag-HA particles were applied for

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8

Miroshnychenko, N. N., and O. A. Kutz. "Selective absorption of heavy metals by soil and humic acids at different pH levels." Fundamental and Applied Soil Science 17, no. 1-2 (2016): 74–82. http://dx.doi.org/10.15421/041607.

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Studying processes of sorption-desorption of heavy metals from soil and its individual components allow to predict long-term effects under conditions of multielement contamination. Cations of heavy metals are showing competitive relationship due to their specific adsorption by components of the soil absorption complex, in particular humic acids. Interaction of chernozem podzolized heavy loam, isolated preparation of humic acids and soil residue after its removal with the solution which contain sulphates of Zn, Cd, Ni, Co and Cu in equal ratio were simulated at different pH levels. The task of

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9

Smiles, D. E., and C. J. Smith. "Absorption of gypsum solution by a potassic soil: a data set." Soil Research 46, no. 1 (2008): 67. http://dx.doi.org/10.1071/sr07103.

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Reliable experimental data required to test hydrodynamic dispersion/chemical reaction models are scarce. This paper provides such a dataset based on absorption of gypsum solution by horizontal columns of relatively dry soil with an initially high exchangeable potassium ratio. Initial and boundary conditions are well defined. Water and cation concentration profiles measured after 200 and 400 min lay on single curves when graphed in terms of distance divided by the square root of time. Cation exchange occurred close to the intake surface and calcium derived from the gypsum was confined to a narr

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10

Nduwumuremyi, Athanase, Vicky Ruganzu, Jayne Njeri Mugwe, and Athanase Cyamweshi Rusanganwa. "Effects of Unburned Lime on Soil pH and Base Cations in Acidic Soil." ISRN Soil Science 2013 (November 26, 2013): 1–7. http://dx.doi.org/10.1155/2013/707569.

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Sustainable agriculture is threatened by the widespread soil acidity in many arable lands of Rwanda. The aim of this study was to determine the quality of unburned limes and their effects on soil acidity and base cations in acidic soils of high land of Buberuka. The lime materials used were agricultural burned lime and three unburned lime materials, Karongi, Musanze, and Rusizi. The test crop was Irish Potato. All lime materials were analyzed for Calcium Carbonate Equivalent (CCE) and Fineness. A field trial in Randomized Complete Block Design was established in 2011 at Rwerere research statio

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11

McCoy, Benjamin J., and Dennis E. Rolston. "Convective transport of gases in moist porous media: effect of absorption, adsorption, and diffusion in soil aggregates." Environmental Science & Technology 26, no. 12 (1992): 2468–76. http://dx.doi.org/10.1021/es00036a020.

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12

Sárközi, Edit, Levente Kardos, Panna Sepsi, Zsolt Varga, György Bisztray, and János Kátai. "Examination of lead absorption ability on chernozem soil and the observation of the accumulation effect of Lactusa sativa L. in pot experimentation." Acta Agraria Debreceniensis, no. 56 (March 11, 2014): 101–4. http://dx.doi.org/10.34101/actaagrar/56/1942.

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In our research a chernozem soil sample formed on loess was collected from an area under cultivation. Our aim was to determine the lead adsorption capacity using a soil column experiment. The study showed saturation of lead content of the soil. The lead accumulation capacity of Lactuca sativa L. was measured in the sections of roots and leaves applying pot experiments. It could be observed that the lettuce accumulated lead easily from the chernozem soil. The lead content was increased in the analyzed sections of the plants against an increasing lead content.

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13

Lu, Haijun, Qian Zhang, Yiqie Dong, Jixiang Li, and Xiong Zhang. "The Adsorption Capacity, Pore Structure, and Thermal Behavior of the Modified Clay Containing SSA." Advances in Materials Science and Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/9894657.

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Sewage sludge ash (SSA) was created by burning municipal sludge. The potential of clay containing 1 or 3 or 5% SSA was assessed for use as a landfill liner-soil material. Batch adsorption, low temperature N2adsorption, and TG-DTA tests were performed to evaluate the adsorption capacity, micropore structure, thermostability, and components of soils under Cr(VI) and Pb(II) chemical solutions. With the increasing amount of SSA in modified clay, the adsorption capacity of Cr(VI) and Pb(II) to the modified clay increases gradually. After absorption, the pore size of modified clay ranges from 2 nm t

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14

Santamarina, J. C., K. A. Klein, Y. H. Wang, and E. Prencke. "Specific surface: determination and relevance." Canadian Geotechnical Journal 39, no. 1 (2002): 233–41. http://dx.doi.org/10.1139/t01-077.

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Specific surface captures the combined effects of particle size and slenderness in a measurement that is independent and complementary to grain-size distribution. There are various methods to measure specific surface, including gas adsorption in dry conditions and selective molecular absorption in aqueous suspensions. The measurement procedure can have an important effect on measured values, yet such sensitivity is informative in itself. The amount of surface in a soil mass determines the balance between surface-related forces and gravimetricskeletal forces acting on a soil particle, affects

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15

Chandler, Neil, John Palson, and Todd Burns. "Capillary rise experiment to assess effectiveness of an enzyme soil stabilizer." Canadian Geotechnical Journal 54, no. 10 (2017): 1509–17. http://dx.doi.org/10.1139/cgj-2016-0511.

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An experimental program to assess of the attributes of an enzyme soil stabilizer is described. The focus of the program was two 1 year capillary rise experiments designed to test the influence of the soil additive on the soil’s adsorption of water. The enzyme additive is typically applied to marginal clay-based soils to improve the performance of road subgrades. The study investigated the potential increase in shear strength and the reduction in swelling. The two long-term soil column tests were conducted to measure water absorption due to capillary rise for soil specimens with, and without, e

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16

Han, Mengxuan, Huan Yang, Na Ding, Shaohong You, and Guo Yu. "The role of plant-associated bacteria in the phytoremediation of heavy metal contaminated soils." E3S Web of Conferences 261 (2021): 04006. http://dx.doi.org/10.1051/e3sconf/202126104006.

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Soil heavy metal pollution is an important environmental problem threatening people’s health and sustainable economic development. Phytoremediation has become an important technology for the treatment of heavy metal contaminated soil with the characteristics of economy and environmental protection. This paper mainly analyzed the role of microbial community in heavy metal contaminated soil remediation process. Bacterias mainly strengthen the remediation effect of plants on heavy metal contaminated soil in two ways: first, bacterias have adsorption effect on heavy metals and reduce the toxicity

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17

Gray-Wannell, Nia, Peter J. Holliman, H. Christopher Greenwell, Evelyne Delbos, and Stephen Hillier. "Adsorption of phosphate by halloysite (7 Å) nanotubes (HNTs)." Clay Minerals 55, no. 2 (2020): 184–93. http://dx.doi.org/10.1180/clm.2020.24.

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AbstractThe adsorption and retention of phosphates in soil systems is of wide environmental importance, and understanding the surface chemistry of halloysite (a common soil clay mineral) is also of prime importance in many emerging technological applications of halloysite nanotubes (HNTs). The adsorption of phosphate anions on tubular halloysite (7 Å) has been studied to gain a greater understanding of the mechanism and kinetics of adsorption on the surface of HNTs. Two well-characterized tubular halloysites with differing morphologies have been studied: one polygonal prismatic and one cylindr

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18

Mahdy, Ahmed M., Elsayed Elkhatib, Tiequan Zhang, Nieven O. Fathi, and Zhi-Qing Lin. "Nano-Scale Drinking Water Treatment Residuals Affect Arsenic Fractionation and Speciation in Biosolids-Amended Agricultural Soil." Applied Sciences 10, no. 16 (2020): 5633. http://dx.doi.org/10.3390/app10165633.

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An incubation experiment was conducted to determine the effects of nanoscale drinking water treatment residuals (nWTRs) on arsenic (As) fractionation and speciation in agricultural soil amended with biosolids. The soils were treated with biosolids of 3% (w/w), along with nWTR application rates of 0, 0.25, 0.50, or 1.00% (w/w). The results revealed that the As adsorption rate increased with increasing the As treatment level from 50 to 800 mg/L. The maximum efficiency of As adsorption was 95%–98% in the soil treated with nWTRs of 1%, while the least As adsorption was 53%–91% in the soil treated

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19

Arocha, M., A. Jackman, and B. McCoy. "Erratum to “VOC immobilization in soil by adsorption, absorption, and encapsulation”, [J. Haz. Mats. 51 (1996) 131–149]." Journal of Hazardous Materials 56, no. 1-2 (1997): 225–26. http://dx.doi.org/10.1016/s0304-3894(97)00067-8.

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20

Beal, C. D., E. A. Gardner, and N. W. Menzies. "Process, performance, and pollution potential: A review of septic tank - soil absorption systems." Soil Research 43, no. 7 (2005): 781. http://dx.doi.org/10.1071/sr05018.

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On-site wastewater treatment and dispersal systems (OWTS) are used in non-sewered populated areas in Australia to treat and dispose of household wastewater. The most common OWTS in Australia is the septic tank–soil absorption system (SAS)—which relies on the soil to treat and disperse effluent. The mechanisms governing purification and hydraulic performance of a SAS are complex and have been shown to be highly influenced by the biological zone (biomat) which develops on the soil surface within the trench or bed. Studies suggest that removal mechanisms in the biomat zone, primarily adsorption a

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21

Stietiya, M. Hashem, Jim J. Wang, and Amitava Roy. "Macroscopic and Extended X-ray Absorption Fine Structure Spectroscopic Investigation of Ligand Effect on Zinc Adsorption to Kaolinite as a Function of pH." Soil Science 176, no. 9 (2011): 464–71. http://dx.doi.org/10.1097/ss.0b013e3182285b46.

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22

Prilutskaya, Natal'ya S., Tat'yana A. Korel'skaya, and Lyudmila F. Popova. "STUDY OF STRUCTURAL AND FUNCTIONAL COMPOSITION OF SOIL HUMUS ACIDS OF EURO-ARCTIC REGION BY MOLECULAR ABSORPTION SPECTROSCOPY (UV / VISIBLE)." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 2 (2018): 97. http://dx.doi.org/10.6060/tcct.20186102.5610.

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Results of the structural and functional composition of soil humus acids in the Euro-Arctic Region are presented. The molecular absorption spectroscopy (UV / visible) was used to evaluate eco-protective role of soils in relation to heavy metals, which is especially important for the sensitive soils of the Arctic, formed under the influence of cryogenic processes. Different types of soils of the Euro-Arctic region: gleyish easy loamy pelosi on loamy moraine (Kanin Peninsula, Cape Kanin Nos); humus peat oligotrophic soil (Kolguev Island, Bugrino village); typical non-calcic loamy gley soil (Vaig

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23

Khairuddin, Wiranto Wengkau, Dwi Juli Puspitasari, Husain Sosidi, and Nov Irmawati Inda. "Adsorpsi Logam Merkuri (Hg) dari Limbah Tanah Tercemar Menggunakan Tanaman Sawi (Brassica juncea L) pada Berbagai Waktu Tanam." KOVALEN: Jurnal Riset Kimia 7, no. 1 (2021): 65–71. http://dx.doi.org/10.22487/kovalen.2021.v7.i1.13666.

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Mercury (Hg) as a gold extractor can cause environmental pollution, therefore, hyperaccumulator plants are needed, such as mustard greens (Brassica juncea L). Research on the effect of planting time of mustard greens on the adsorption of mercury (Hg) metal ion on contaminated soil waste has been carried out. The purpose of this research was to determine the concentration and adsorption mechanism of Hg metal ion from contaminated soil at roots and canopy of mustard plants at various planting times. Amount of Hg metal ion adsorbed on the roots and canopy of mustard greens at 2, 4, and 6 weeks of

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24

Sulakhudin, Abdul Syukur, and Bambang Hendro Sunarminto. "Zeolite and Hucalcia as Coating Material for Improving Quality of NPK Fertilizer in Costal Sandy Soil." Journal of Tropical Soils 16, no. 2 (2013): 99–106. http://dx.doi.org/10.5400/jts.2011.v16i2.99-106.

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The growth and yield of plants are mainly a function of the quantity of fertilizer and water. In coastal sandy soil, nutrient losses and dry soils are seriously problems. The objective of the research was to study effect of zeolite and hucalci concentrations as NPK coating materials on NPK qualities i.e. water adsorption and release of N, P and K. The research used a coastal sandy soil as media. It was conducted in a laboratory of Soil Science Department, Gadjah Mada University from July to August 2009. Experimental design used was a factorial in a completely randomized design. The first facto

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Pranoto, Pranoto, Tri Martini, and Winda Maharditya. "Uji Efektivitas dan Karakterisasi Komposit Tanah Andisol/Arang Tempurung Kelapa Untuk Adsorpsi Logam Berat Besi (Fe)." ALCHEMY Jurnal Penelitian Kimia 16, no. 1 (2020): 50. http://dx.doi.org/10.20961/alchemy.16.1.33286.50-65.

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<p>Penelitian ini untuk mengetahui kapasitas adsorpsi komposit tanah andisol/arang tempurung kelapa sebagai adsorben logam berat besi (Fe) berdasarkan pada kondisi komposisi, pH dan waktu kontak yang optimum. Tanah andisol diaktivasi dengan larutan NaOH 3 M dan arang tempurung kelapa diaktivasi menggunakan larutan HCl 4 M. Komposit tanah andisol/arang tempurung kelapa dibuat dengan mencampurkan tanah andisol dan arang tempurung kelapa pada variasi komposisi 100:0, 75:25, 50:50, 25:75 dan 0:100 (b/b) Uji adsorpsi terhadap logam besi (Fe) dilakukan pada variasi pH larutan 1, 2, 3, 4, 5 dan

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Pranoto, Pranoto, Tri Martini, and Winda Maharditya. "Uji Efektivitas dan Karakterisasi Komposit Tanah Andisol/Arang Tempurung Kelapa Untuk Adsorpsi Logam Berat Besi (Fe)." ALCHEMY Jurnal Penelitian Kimia 16, no. 1 (2020): 50. http://dx.doi.org/10.20961/alchemy.16.1.33286.50-66.

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<p>Penelitian ini untuk mengetahui kapasitas adsorpsi komposit tanah andisol/arang tempurung kelapa sebagai adsorben logam berat besi (Fe) berdasarkan pada kondisi komposisi, pH dan waktu kontak yang optimum. Tanah andisol diaktivasi dengan larutan NaOH 3 M dan arang tempurung kelapa diaktivasi menggunakan larutan HCl 4 M. Komposit tanah andisol/arang tempurung kelapa dibuat dengan mencampurkan tanah andisol dan arang tempurung kelapa pada variasi komposisi 100:0, 75:25, 50:50, 25:75 dan 0:100 (b/b) Uji adsorpsi terhadap logam besi (Fe) dilakukan pada variasi pH larutan 1, 2, 3, 4, 5 dan

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27

Laufs, Sebastian, Mathieu Cazaunau, Patrick Stella, et al. "Diurnal fluxes of HONO above a crop rotation." Atmospheric Chemistry and Physics 17, no. 11 (2017): 6907–23. http://dx.doi.org/10.5194/acp-17-6907-2017.

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Abstract. Nitrous acid (HONO) fluxes were measured above an agricultural field site near Paris during different seasons. Above bare soil, different crops were measured using the aerodynamic gradient (AG) method. Two LOPAPs (LOng Path Absorption Photometer) were used to determine the HONO gradients between two heights. During daytime mainly positive HONO fluxes were observed, which showed strong correlation with the product of the NO2 concentration and the long wavelength UV light intensity, expressed by the photolysis frequency J(NO2). These results are consistent with HONO formation by photos

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Adam, Nadia. "A Wet-Chemical and Phosphorus K-edge X-ray Absorption Near Edge Structure Investigation of Phosphate Adsorption on Binary Mixtures of Ferrihydrite and Calcite: Implications for Phosphorus Bioavailability." Soil Science Society of America Journal 81, no. 5 (2017): 1079–87. http://dx.doi.org/10.2136/sssaj2016.10.0342.

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29

Sun, Lei, Han Qiao Liu, Guo Xia Wei, Zhen Hua Wu, and Wei Yang. "Removal of Heavy Metals from Contaminated Soils by Washing with Citric Acid and Subsequent Treatment of Soil-Washing Solutions." Advanced Materials Research 937 (May 2014): 646–51. http://dx.doi.org/10.4028/www.scientific.net/amr.937.646.

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Soil washing experiments were carried out with citric acid as washing reagent for the remediation of soils highly contaminated with heavy metals, then activated carbon was used in absorption processing for leaching solution. In this study, the effects of the main operating variables for removal of metals from soils were first discussed. The results showed that 36.% Pb, 47.74% Cu and 61.88% Cd were removed from the contaminated soils by optimizing the washing parameters at citric acid concentration 0.2 mol/l, mixing time 2 h, liquid-soil ratio 20 and solution pH=4, respectively. In the adsorpti

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Kim, Hyesu, Jaehyung Yu, Lei Wang, Yongsik Jeong, and Jieun Kim. "Variations in Spectral Signals of Heavy Metal Contamination in Mine Soils Controlled by Mineral Assemblages." Remote Sensing 12, no. 20 (2020): 3273. http://dx.doi.org/10.3390/rs12203273.

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This paper illustrates a spectroscopic analysis of heavy metal concentration in mine soils with the consideration of mineral assemblages originated by weathering and mineralization processes. The mine soils were classified into two groups based on the mineral composition: silicate clay mineral group (Group A) and silicate–carbonate–skarn–clay mineral group (Group B). Both soil groups are contaminated with Cu, Zn, As, and Pb, while the contamination level was higher for Group A. The two groups exhibit different geochemical behaviors with different heavy metal contamination. The spectral variati

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Nielsen, Ulla Gro, Younkee Paik, Keinia Julmis, Martin A. A. Schoonen, Richard J. Reeder, and Clare P. Grey. "Investigating Sorption on Iron−Oxyhydroxide Soil Minerals by Solid-State NMR Spectroscopy: A6Li MAS NMR Study of Adsorption and Absorption on Goethite." Journal of Physical Chemistry B 109, no. 39 (2005): 18310–15. http://dx.doi.org/10.1021/jp051433x.

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Riapanitra, Anung, and Roy Andreas. "PEMANFAATAN ARANG BATOK KELAPA DAN TANAH HUMUS BATURRADEN UNTUK MENURUNKAN KADAR LOGAM KROM (Cr)." Molekul 5, no. 2 (2010): 66. http://dx.doi.org/10.20884/1.jm.2010.5.2.78.

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Waste containing hazardous and toxic chemical compounds into the environment leads to water pollution, soil and air. These chemical compounds will endanger human life and environment. One type of compound that may pollute the environment is chromium. The metal is commonly found in industrial waste such as from exhaust and industrial wastewater from etal plating company.The purpose of this research is to utilize coconut shell charcoal and soil humus as a low-cost and ready-made alternative material to reduce the concentration chromium (Cr) on wastewater. Humus was taken from Baturraden region a

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Selvarajh, Gunavathy, and Huck Ywih Ch’ng. "Enhancing Soil Nitrogen Availability and Rice Growth by Using Urea Fertilizer Amended with Rice Straw Biochar." Agronomy 11, no. 7 (2021): 1352. http://dx.doi.org/10.3390/agronomy11071352.

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Urea fertilizer as a nitrogen source is used widely and globally. However, N loss through ammonia volatilization from applied urea has become a major drawback to agriculture. A pot experiment was conducted to determine the effect of rice straw biochar on (1) total N, soil exchangeable NH4+, and available NO3− (2) uptake of N, P, and K in rice plants. The treatments evaluated were: (S: Soil only, U: soil + 175 kg ha−1 urea, B1: soil + 175 kg ha−1 urea + 5 t ha−1 rice straw biochar, B2: soil + 175 kg ha−1 urea + 10 t ha−1 rice straw biochar, CB1: 50% soil + 50% commercial biochar potting media a

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Wang, Ning, Huihui Du, Qiaoyun Huang, et al. "Surface complexation modeling of Cd(II) sorption to montmorillonite, bacteria, and their composite." Biogeosciences 13, no. 19 (2016): 5557–66. http://dx.doi.org/10.5194/bg-13-5557-2016.

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Abstract. Surface complexation modeling (SCM) has emerged as a powerful tool for simulating heavy metal adsorption processes on the surface of soil solid components under different geochemical conditions. The component additivity (CA) approach is one of the strategies that have been widely used in multicomponent systems. In this study, potentiometric titration, isothermal adsorption, zeta potential measurement, and extended X-ray absorption fine-structure (EXAFS) spectra analysis were conducted to investigate Cd adsorption on 2 : 1 clay mineral montmorillonite, on Gram-positive bacteria Bacill

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Gonzalez-Rodriguez, Sara, and Maria Luisa Fernandez-Marcos. "Phosphate sorption and desorption by two contrasting volcanic soils of equatorial Africa." PeerJ 6 (October 23, 2018): e5820. http://dx.doi.org/10.7717/peerj.5820.

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Volcanic soils cover 1% of the Earth’s surface but support 10% of the world’s population. They are among the most fertile soils in the world, due to their excellent physical properties and richness in available nutrients. The major limiting factor for plant growth in volcanic soils is phosphate fixation, which is mainly attributable to active species of aluminium and iron. The sorption and desorption of phosphate is studied on the surface horizons of two African agricultural soils, a silandic Andosol (Rwanda) and a vitric Andosol (São Tomé and Principe). Both soils are slightly acid. The silan

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Webster, Eva M. "Models of the equilibrium distribution of organic chemicals between water and solid phases of environmental media." Environmental Reviews 22, no. 4 (2014): 430–44. http://dx.doi.org/10.1139/er-2013-0079.

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Water–solid phase equilibrium distributions are foundational to multimedia environmental fate models of anthropogenic organic chemicals. This contextual review of equilibrium models of ionizing organics in aqueous–solids systems highlights the broad range of modeling assumptions and paradigms that have been employed. The complexity of soils and sediment, especially the organic phase, is provided as background along with a description of equilibrium models for nonpolar, nonionizing organics. The ways in which these single-species models have been modified and adapted for application to ionizing

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Tavallali, Hossein, Saeed Zahmatkesh, Mehdi Aalaei, and Dawood Abdardideh. "Synthesis and Application of Glutaric Dihydrazide Modified Multiwalled Carbon Nanotubes for Selective Solid-Phase Extraction and Preconcentration of Cu(II), Zn(II), Ni(II), and Fe(III)." Journal of AOAC INTERNATIONAL 95, no. 3 (2012): 897–902. http://dx.doi.org/10.5740/jaoacint.11-273.

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Abstract An SPE method for selective separation-preconcentration of Cu(II), Zn(II), Ni(II), and Fe(III) on multiwalled carbon nanotubes (MWCNTs) modified by glutaric dihydrazide prior to flame atomic absorption spectrometric determination was investigated. The adsorption was achieved quantitatively on MWCNTs at pH 5.0, and then the retained metal ions on the adsorbent were eluted with 1 M HNO3. The effects of analytical parameters including pH of the solution, eluent type, sample volume, and matrix ions were investigated for optimization of the presented procedure. The adsorption capacity of t

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Unsal, Yunus Emre, Mustafa Tuzen, and Mustafa Soylak. "Flame Atomic Absorption Spectrometric Determination of Gold After Solid-Phase Extraction of Its 2-Aminobenzothiazole Complex on Diaion SP-207." Journal of AOAC INTERNATIONAL 99, no. 2 (2016): 534–38. http://dx.doi.org/10.5740/jaoacint.11-0490.

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Abstract An SPE of Au (III) on a 2-aminobenzothiazole–coated Diaion SP 207-column system has been developed. The parameters, including pH of solution, amount of 2-aminobenzothiazole, eluent type, sample volume, and flow rates, were examined. The effects of alkali, alkali earth, and some metals were also studied. The recovery values at optimal conditions and detection limits for Au (III) were found as &gt;95% and 3.8 μg L−1, respectively. The factor of preconcentration was 250. The RSD value was &lt;5%. The capacity of adsorption for the resin was 10.4 mg g−1. The accuracy of the method

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Li, Zhichao, Wanchun Lu, and Jilin Huang. "Monitoring, Diffusion and Source Speculation Model of Urban Soil Pollution." Processes 8, no. 11 (2020): 1339. http://dx.doi.org/10.3390/pr8111339.

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The rapid industrialization of cities has brought many challenges to the environment and resources. Industrial wastes, automobile exhaust, coal combustion soot and other pollutants accumulate in urban soil, and the characteristics of urban soil are changed, causing many pollutants to accumulate in the urban soil environment. Heavy metals are toxic and harmful pollutants existing in soil that cannot be biodegraded or thermally degraded; thus, heavy metals pose a threat to environmental quality and humans. To solve the environmental pollution of soil heavy metals, we utilize kriging interpolatio

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R. B. Witono, Judy, Henrietta Henrietta, and Y. I. P. Arry Miryanti. "The Effect of Crosslinker and Pore Generated on Selective Adsorbent (Cu2+) based on Grafting of Acrylic Acid onto Cassava Starch." Modern Applied Science 9, no. 7 (2015): 37. http://dx.doi.org/10.5539/mas.v9n7p37.

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The technology development in many industries nowadays, such as electronic industry produces heavy metal wastes which may pollute our environment. The use of adsorbent as a heavy metal removal from soil and water is one of the efficient process which can be considered to be used. In addition the release of the adsorbate becomes an important way as well because usually those heavy metals still have a high value. The objective of this research is to develop adsorbent based on cassava starch. So, the release process will become easier and will not produce another waste. The adsorbent was produced

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Shirani, Mahboube, Ali Akbari, and Mohsen Hassani. "Adsorption of cadmium(ii) and copper(ii) from soil and water samples onto a magnetic organozeolite modified with 2-(3,4-dihydroxyphenyl)-1,3-dithiane using an artificial neural network and analysed by flame atomic absorption spectrometry." Analytical Methods 7, no. 14 (2015): 6012–20. http://dx.doi.org/10.1039/c5ay01269d.

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Baghaie, Amir Hossein, and Mehran Keshavarzi. "The Effect of Montmorillonite Nano-Clay on the Changes in Petroleum Hydrocarbon Degradation and Cd Concentration in Plants Grown in Cd-Polluted Soil." Avicenna Journal of Environmental Health Engineering 5, no. 2 (2018): 100–105. http://dx.doi.org/10.15171/ajehe.2018.13.

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Contamination with heavy metals and petroleum hydrocarbons is considered as an environmental problem. Thus, this research was done to evaluate the effect of montmorillonite nano-clay on the changes in petroleum hydrocarbon degradation and cadmium (Cd) concentration in plant grown in a Cd-polluted soil. Treatments consisted of two levels of montmorillonite nano-clay (0 and 1% W/W) in a Cd-polluted soil (0, 5, 10 mg Cd/kg soil) and crude oil-polluted soil (0, 1 and 2% W/W). The plant used in this study was Tall Fescue (Festuca arundinacea L.). After 20 weeks, the concentration of Cd in plants wa

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Lian, J. J., S. G. Xu, Y. M. Zhang, and C. W. Han. "Molybdenum(VI) removal by using constructed wetlands with different filter media and plants." Water Science and Technology 67, no. 8 (2013): 1859–66. http://dx.doi.org/10.2166/wst.2013.067.

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The efficacy and capacity of vertical-flow wetland filters on molybdenum (Mo) removal from wastewater was examined, employing reed (Phragmites australis) and cattail (Typha latifolia) as well as different adsorption granular media. Humus, cinder, modified cinder, as well as pyrite were used as filter media. A synthetic effluent with different concentrations of Mo(VI) at different hydraulic retention times was used for simulating Mo leached mine wastewater. Laboratory experiments showed that the equilibrium adsorption data were in agreement with the Langmuir isotherm model, and the maximum Mo(V

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Czinkota, Imre, I. Issa, G. Rétháti, and B. Kovács. "Determination of the Behaviour and the Transport Parameters of Chromium in Soil-Water Systems." Agrokémia és Talajtan 55, no. 1 (2006): 287–94. http://dx.doi.org/10.1556/agrokem.55.2006.1.31.

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A complex investigation was performed for a polluted area using both experi-mental and computer modelling methods. Among the experimental methods the adsorption and desorption isotherms were measured to estimate the concentration dependent equilibrium in the soil-groundwater system. A new calculation method was worked out for determining the transport para-meters from results of laboratory tests. Heavy metal solution was leached through a soil column continuously. The effluent fluidum was collected, and the heavy metal concentration of the collected fractions was measured by atomic absorption

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Liu, Pei Ya, Huan Liu, Yu Jiao Li, and Chang Xun Dong. "Remediation of Arsenic Contaminated Soils and Treatment of Washing Effluent Using Calcined Mn-Fe Layered Double Hydroxide." Advanced Materials Research 955-959 (June 2014): 2014–21. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.2014.

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Arsenic contaminated soil is a serious worldwide problem nowadays, and soil washing technique is one of hottest topics in the area of remediating arsenic contaminated soils, while treatment of the washing effluent is still an urgent problem. In this study, in order to select the best washing extractants for arsenic contaminated soil of the Xiangxi Autonomous Prefecture, nine kinds of extractants (citric acid, oxalic acid, malic acid, tartaric acid, H3PO4, KH2PO4, KOH, NH4Ac and ultra-pure water) were studied. Innovatively, a new material (calcined Mn-Fe Layered double hydroxide) was firstly in

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Rana, MM, MT Islam, S. Datta, MM Rahman, and AKM Adham. "Suitability of powerplant disposed water for irrigation of Ashuganj agro-irrigation project in Bangladesh." Progressive Agriculture 30, no. 1 (2019): 113–24. http://dx.doi.org/10.3329/pa.v30i1.42218.

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A study was conducted to analyze the quality of power plant disposed water for irrigation and its impact on the soil of Ashuganj agro-irrigation project in Bangladesh. Water samples were collected during the irrigation period and chemically analyzed for the assessment of their quality based on pH, electrical conductivity (EC), sodium adsorption ratio (SAR), soluble sodium percentage (SSP), residual sodium bicarbonate (RSBC), Kelley‘s ratio (KR), total hardness (TH), magnesium absorption ratio (MAR) and permeability index (PI). Most of the water samples were basically excellent in case of EC an

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Lima, Regina Lúcia Félix de Aguiar. "Micorrizas arbusculares e absorção de fósforo em função da capacidade de fixação de fósforo do solo e da competição com a microbiota." Revista Brasileira de Geografia Física 13, no. 3 (2020): 1062. http://dx.doi.org/10.26848/rbgf.v13.3.p1062-1079.

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Fungos micorrízicos arbusculares (FMA) se associam às raízes das plantas e incrementam a absorção de fósforo (P), macronutriente com baixa mobilidade no solo. A capacidade de fixação de P do solo e a competição com a biota heterotrófica afetam sua disponibilidade para plantas. Visando avaliar a contribuição dos FMA na absorção de P em solos com capacidade crescente de fixação ou em situação de competição com a biota foram realizados experimentos em vasos compartimentalizados cultivados com braquiária associada a FMA, contendo substrato marcado com 32P. Foram quantificadas a massa seca das plan

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Fan, Zhi Ping, Qiong Wang, Fa Yun Li, and Xue Kai Sun. "Absorption Ability of Different Tree Species to S, Cl and Heavy Metals in Urban Forest Ecosystem." Advanced Materials Research 518-523 (May 2012): 48–53. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.48.

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Heavy metals and atmosphere pollutants that caused the soil pollution and low air quality are main environmental problems in cities which located in the industrialized regions. Different tree species in urban forest ecosystem have absorption ability to heavy metals in the soil and atmosphere pollutant and ameliorate environmental pollution. However, the influence of different tree species on the absorption ability of different pollutant is not yet clear, and this held up selection suitable tree species in urban forest plantations to improve urban environment. In the study we compered pollution

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Guerra, Fernanda, Mohamed Attia, Daniel Whitehead, and Frank Alexis. "Nanotechnology for Environmental Remediation: Materials and Applications." Molecules 23, no. 7 (2018): 1760. http://dx.doi.org/10.3390/molecules23071760.

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Environmental remediation relies mainly on using various technologies (e.g., adsorption, absorption, chemical reactions, photocatalysis, and filtration) for the removal of contaminants from different environmental media (e.g., soil, water, and air). The enhanced properties and effectiveness of nanotechnology-based materials makes them particularly suitable for such processes given that they have a high surface area-to-volume ratio, which often results in higher reactivity. This review provides an overview of three main categories of nanomaterials (inorganic, carbon-based, and polymeric-based m

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Baghaie, Amir Hossein. "Effect of Organic Nano-Materials on Heavy Metals Concentration of Wheat Plants Inoculated With Piriformospora indica Fungus and Irrigated With Wastewater of Plating Industry." Avicenna Journal of Environmental Health Engineering 7, no. 1 (2020): 20–28. http://dx.doi.org/10.34172/ajehe.2020.04.

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Removal of heavy metals from industrial effluents is one of the most important in environmental research. This research was done to investigate the adsorption effect of multiwall carbon nanotubes (MWNTs) and nano Zn-oxide on decreasing chromium (Cr) and cadmium (Cd) concentration in wheat inoculated with Piriformospora indica (P.indica) that irrigated with wastewater of plating industry. Treatments were consist of applying MWCNs (0 and 0.5 % (W/W)) and nano Zn-oxide (0 and 1.5 % (W/W)) in the soil irrigated with the wastewater of plating industry under wheat inoculated with P.indica. This rese

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