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1

Mokwenye, Ifesinachi I., Paul N. Diagboya, Bamidele I. Oluowolabi, Ikenna O. Anigbogu, and Hilary I. Owamah. "Immobilization of toxic metal cations on goethite-amended soils: a remediation strategy." Journal of Applied Sciences and Environmental Management 20, no. 2 (2016): 436–43. http://dx.doi.org/10.4314/jasem.v20i2.26.

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The study investigates a simple and viable option to reduce toxic metals mobility and availability in four surface (0–30cm) soils with varying physicochemical properties amended by different percentages of goethite. Batch sorption experiments carried out to study the effectiveness of immobilizing Pb2+, Cu2+, Zn2+ and Cd2+ ions on these soils showed that goethite played vital role in the metals adsorption (≥10% increase in adsorption). Removal of soil iron oxides caused reduced Pb2+ adsorption on soils with high organic matter (≤ 10% decrease in adsorption) with no significant increase in adsor
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2

Wang, Shiyu, Junnan Zhang, Fada Zhou, et al. "Adsorption of EDCs on Reclaimed Water-Irrigated Soils: A Comparative Analysis of a Branched Nonylphenol, Nonylphenol and Bisphenol A." Water 13, no. 18 (2021): 2532. http://dx.doi.org/10.3390/w13182532.

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Nonylphenol (NP) and bisphenol A (BPA) are two typical endocrine disrupter chemicals (EDCs) in reclaimed water. In this study, the adsorptions of NP, a branched NP (NP7) and BPA on reclaimed water-irrigated soils were studied by isothermal experiments, and the different environmental factors on their adsorptions were investigated. The results showed that the adsorptions of NP and NP7 on soils conformed to the Linear model, and the adsorption of BPA conformed to the Freundlich model. The adsorptions of NP, NP7 and BPA on soils decreased with increasing temperatures and pHs. Adsorption equilibri
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3

Bao, Yanyu, Qixing Zhou, and Yingying Wang. "Adsorption characteristics of tetracycline by two soils: assessing role of soil organic matter." Soil Research 47, no. 3 (2009): 286. http://dx.doi.org/10.1071/sr08112.

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The adsorption characteristics of tetracycline by 2 soils including a clay-rich soil (cinnamon soil) and an iron oxide-rich soil (red soil) were investigated as a function of soil organic matter (SOM). SOM is the main adsorbent for tetracycline in the soil environment. The results indicated that the adsorption kinetics of tetracycline by the different soils with or without organic matter was described by the Elovich equation and the exponent equation. The adsorption of tetracycline on red soil was quite rapid and equilibrium could be reached after 5 h. In contrast, the concentration of tetracy
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4

Mejías, Carmen, Juan Luis Santos, Julia Martín, Irene Aparicio, and Esteban Alonso. "Thermodynamic and Kinetic Investigation of the Adsorption and Desorption of Trimethoprim and Its Main Metabolites in Mediterranean Crop Soils." Molecules 28, no. 1 (2023): 437. http://dx.doi.org/10.3390/molecules28010437.

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The adsorption–desorption processes of organic pollutants into the soil are one of the main factors influencing their potential environmental risks and distribution in the environment. In the present work, the adsorption–desorption behavior of an antibiotic, trimethoprim (TMP), and two of its main metabolites, 3-desmethyltrimethoprim (DM-TMP) and 4-hydroxytrimethoprim (OH-TMP), were assessed in three Mediterranean agricultural soils with different physicochemical characteristics. Results showed that the adsorption kinetic is performed in two steps: external sorption and intraparticle diffusion
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5

Fouad, Mohamed Riad. "Physical characteristics and Freundlich model of adsorption and desorption isotherm for fipronil in six types of Egyptian soil." Current Chemistry Letters 12, no. 1 (2023): 207–16. http://dx.doi.org/10.5267/j.ccl.2022.8.003.

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The soil type and temperature are considered important parameters that can influence the rates and equilibria of different environmental processes. Therefore, the adsorption and desorption isotherms of fipronil in clay loam, clay, sandy loam, sandy clay loam, sand and loamy sand soils at 25 and 50˚C was studied. The amount of fipronil adsorbed and desorbed by different soils was significantly influenced by the temperature. Adsorption was higher in clay loam, clay, sandy clay loam and sandy soil at 25°C, while sand soil and loamy sand soil at 50°C. The non-desorbed amount was greater at 25°C in
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6

Jaffri, Shaan Bibi, Khuram Shahzad Ahmad, Mehtabidah Ali, and Shahid Iqbal. "Sorptive Interactions of Fungicidal 2-(4'-Thiazolyl) Benzimidazole with Soils of Divergent Physicochemical Composition." International Journal of Economic and Environmental Geology 10, no. 2 (2019): 97–104. http://dx.doi.org/10.46660/ijeeg.vol10.iss2.2019.268.

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Thiabendazole, 2-(4'-thiazolyl) Benzimidazole fungicide is rampantly used in Pakistan for controlling fungalgrowth in addition to combating various fungus driven diseases. Thiabendazole leaching and mobility patterns can beeasily predicted through investigation of Thiabendazole adsorption and desorption behavior in soils. Present work iscarried out by conducting a batch equilibration experiment for evaluation of Thiabendazole adsorption and desorption insoils from four diverse Pakistani climatological regions. Data revealed Thiabendazole had moderate to weak adsorption inselected soils with di
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7

Jaffri, Shaan Bibi, Khuram Shahzad Ahmad, Mehtabidah Ali, and Shahid Iqbal. "Sorptive Interactions of Fungicidal 2-(4'-Thiazolyl) Benzimidazole with Soils of Divergent Physicochemical Composition." International Journal of Economic and Environmental Geology 10, no. 2 (2019): 97–104. http://dx.doi.org/10.46660/ojs.v10i2.268.

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Thiabendazole, 2-(4'-thiazolyl) Benzimidazole fungicide is rampantly used in Pakistan for controlling fungalgrowth in addition to combating various fungus driven diseases. Thiabendazole leaching and mobility patterns can beeasily predicted through investigation of Thiabendazole adsorption and desorption behavior in soils. Present work iscarried out by conducting a batch equilibration experiment for evaluation of Thiabendazole adsorption and desorption insoils from four diverse Pakistani climatological regions. Data revealed Thiabendazole had moderate to weak adsorption inselected soils with di
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8

Jing, Sun, Ma Xiu Lan, Wang Wen, Zhang Jing, Zhang Hao, and Wang Yu Jun. "Adsorption characteristics of atrazine on different soils in the presence of Cd(II)." Adsorption Science & Technology 38, no. 7-8 (2020): 225–39. http://dx.doi.org/10.1177/0263617420928845.

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In this study, the effects of temperature, pH, and biochar under cadmium stress on the adsorption characteristics of atrazine in soils in northeast China were studied by batch adsorption method. In the atrazine–Cd(II) coexistence system, the adsorption of atrazine by the soils reached equilibrium within 24 h, but there were some differences in sorption capacities of the three types of soil and the order of adsorption is albic soil > black soil > saline-alkaline soil. With the concentration of atrazine increased, the adsorption capacity of atrazine in the three types of soil gradually inc
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9

Petruzzelli, Gianniantonio, and Francesca Pedron. "Adsorption, Desorption and Bioavailability of Tungstate in Mediterranean Soils." Soil Systems 4, no. 3 (2020): 53. http://dx.doi.org/10.3390/soilsystems4030053.

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The adsorption and desorption process of the tungstate ion was studied in three soils characteristic of the Mediterranean area, with particularly reference to bioavailability pathways. In the three soils examined, the tungstate adsorption was described by a Langmuir-type equation, while the desorption process showed that not all the adsorbed tungstate was released, probably due to the formation of different bonds with the adsorbing soil surfaces. The pH was found to be the main soil property that regulates the adsorption/desorption: The maximum adsorption occurred in the soil with the acidic p
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10

El Boukili, Abdellah, Nidae Loudiyi, Ahmed El Bazaoui, Abderrahim El Hourch, M'Hamed Taibi, and Abderrahman EL Boukili. "Adsorption and Desorption Behavior of Herbicide Mefenpyr-diethyl in the Agricultural Soils of Morocco." Mediterranean Journal of Chemistry 7, no. 5 (2018): 386–95. http://dx.doi.org/10.13171/mjc7519111210255aeb.

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The present study was conducted in order to investigate the adsorption and desorption behavior of Mefenpyr-diethyl (MFD) using the batch equilibration technique in four soils, with different ranges of organic matter content, from different regions of Morocco orders of Benimellal (Soil 1), Settat (Soil 2), Sidi Bettach (Soil 3) and EL Hajeb (Soil 4). The adsorption isotherm models Langmuir, linear and Freundlich were used to compare the adsorption capacity of the soils. The results indicated that the Freundlich equation provided the best fit for all adsorption data. The values of KF and Kd rang
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11

Rukh, Shah, Saleem Akhtar, Ayaz Mehmood, et al. "Arsenate and arsenite adsorption in relation with chemical properties of alluvial and loess soils." Journal of the Serbian Chemical Society 82, no. 7-8 (2017): 943–54. http://dx.doi.org/10.2298/jsc170209042r.

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Arsenic is one of the most toxic elements in the soil environment. Understanding of the arsenic adsorption chemistry is essential for evolving the extent of soil and groundwater contaminations. This research was conducted to determine the variation in adsorption behaviour of arsenite and arsenate with depth in different lithology soils. We sampled two parent materials at genetic horizons, and within a parent material, we selected two soils. Besides basic soil characterizations, a laboratory batch experiments were carried out to study the adsorption of arsenate and arsenite. Freundlich adsorpti
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12

Goetz, Andrew J., Robert H. Walker, Glenn Wehtje, and Ben F. Hajek. "Sorption and Mobility of Chlorimuron in Alabama Soils." Weed Science 37, no. 3 (1989): 428–33. http://dx.doi.org/10.1017/s0043174500072179.

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Soil thin-layer chromatography and a soil solution technique were used to evaluate chlorimuron adsorption and mobility in five Alabama soils. The order of adsorption was atrazine > metribuzin > chlorimuron; mobility was chlorimuron > metribuzin > atrazine. The order of adsorption of chlorimuron in the five soils was Sumter clay > Eutaw clay > Lucedale fine sandy loam > Decatur silt loam > Dothan sandy loam, and Rfvalues were 0.63, 0.73, 0.69, 0.76, and 0.80, respectively. Chlorimuron mobility and adsorption were not highly correlated to any one soil type. Adsorption of
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13

Luchini, L. C. "ADSORPTIVE BEHAVIOUR OF HERBICIDES IN BRAZILIAN SOILS." Arquivos do Instituto Biológico 64, no. 1 (1997): 43–49. https://doi.org/10.1590/1808-1657v64n1p0431997.

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ABSTRACT The adsorptive behaviour of 1 4 C-paraquat, 1 4 C-diuron and 1 4 C-2,4-D at six different concentrations was studied in three soils through the Freundlich' s adsorption and desorption isotherms. Paraquat was the most adsorbed by the soils, independently of the concentration. The percentage of its retention was ever higherthan 90% for all soils. Diuron presented intermediate adsorption among the three herbicides. The redution of the . organic matter by oxidation with H2 O2 affected very little the retention of paraquat by the soils. On the other hand, diuron was very little adsorbed by
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14

Shao, Xing Hua, and Jiang Zhong Zhang. "Effect of Flooding Time on Phosphate Adsorption Desorption Characteristics of Two Acid Soils." Applied Mechanics and Materials 195-196 (August 2012): 1288–93. http://dx.doi.org/10.4028/www.scientific.net/amm.195-196.1288.

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In a laboratory incubation study, two soils were treated with distilled water, and flooded for a period of 0 (contr-ol), 1, 2, 3, 4, 8 weeks. P adsorption desorption characteristics of two soils were measured at the end of the incubation period. P a-dsorption increased with increasing levels of added P in two soi-ls. P adsorption of Paddy soil was comparatively lower than that of upland red soil. P adsorption data was found to fit Langmuir isotherms for two soils. Soil P adsorption maxima obtained from Langmuir isotherm varied from 1190 to 672 mg/kg for upland r-ed soil, and varied from 708 to
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15

Cui, Jiatao, Mengyu Zhang, Meng Mi, et al. "Effects of swine manure and straw biochars on fluorine adsorption-desorption in soils." PLOS ONE 19, no. 5 (2024): e0302937. http://dx.doi.org/10.1371/journal.pone.0302937.

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With increasing global awareness of soil health, attention must be paid to fluorine exposure in soils, which poses a threat to human health. Therefore, this study aimed to study the fluorine adsorption characteristics of swine manure and straw biochars and their impact on fluorine adsorption-desorption in soil with batch experiments. The biochar samples originated from high-temperature anaerobic cracking of swine manure (350°C, 500°C, and 650°C) and straw (500°C). Results indicated that the adsorption of soil fluorine reached adsorption equilibrium at around 4 h after the mixing of swine manur
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16

Yusran, Fadly Hairannoor. "The Relationship between Phosphate Adsorption and Soil Organic Carbon from Organic Matter Addition." JOURNAL OF TROPICAL SOILS 15, no. 1 (2018): 1. http://dx.doi.org/10.5400/jts.2010.v15i1.1-10.

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The Relationship between Phosphate Adsorption and Soil Organic Carbon from Organic Matter Addition (FH Yusran): The application of organic matter (OM) can increase soil phosphorus (P) availability via soil mineralisation. In lateritic soils, however, soluble organic carbon (OC) from OM may also reduce phosphate adsorption capacity, a process that also releases P in soil solution. In these soils, competitive adsorption could be dominant compared to mineralisation. The main objectives of this study were to study phosphate adsorption in three lateritic soils which have been treated with different
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17

Li, Wanting, Ruifeng Shan, Yuna Fan, and Xiaoyin Sun. "Effects of tall fescue biochar on the adsorption behavior of desethyl-atrazine in different types of soil." BioResources 16, no. 2 (2021): 3575–95. http://dx.doi.org/10.15376/biores.16.2.3575-3595.

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Desethyl-atrazine (DEA) is a metabolite of atrazine that exerts a considerable influence on the environment. In this study, tall fescue biochar was prepared by pyrolysis at 500 °C, and batch experiments were conducted to explore its effect on the adsorption behavior of DEA in red soil, brown soil, and black soil. The addition of biochar increased the equilibrium amount of DEA adsorption for the three soil types. A pseudo-second-order kinetic model most closely fit the DEA adsorption kinetics of the three soils with and without biochar, with a determination coefficient (R2) of 0.962 to 0.999. T
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18

Bolton, K. A., and L. J. Evans. "Cadmium adsorption capacity of selected Ontario soils." Canadian Journal of Soil Science 76, no. 2 (1996): 183–89. http://dx.doi.org/10.4141/cjss96-025.

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The retention of Cd by selected Ontario soils with a range of soil properties was investigated. Batch adsorption experiments were carried out at the actual (unadjusted) PH of the soil and at a range of PH values adjusted by the addition of acid or base. For all soils, Cd adsorption increased with increasing pH and with increasing Cd solution concentration. The adsorption data was fitted, by a linear least squares technique, to the Langmuir adsorption isotherm. Maximum adsorption, qmax, at unadjusted soil pH values ranged from less than 8 mmol kg−1 for the Fox sandy soil to 64.8 mmol kg−1 for t
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19

Bao, Yan Jiao, Hong Sheng Ding, and Yan Yu Bao. "Effects of Temperature on the Adsorption and Desorption of Tetracycline in Soils." Advanced Materials Research 726-731 (August 2013): 344–47. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.344.

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Batch experiments of OECD Guide were conducted to the adsorption and desorption of tetracycline in soils. The adsorption and desorption isotherms of tetracycline in cinnamon soil and red soil were expressed well by the Freundlich equation at 20, 25 and 35°C. According to lg Kf and 1/n values of fitting parameters, tetracycline was strongly adsorbed by two soils with adsorption capacity (lg Kf) values from 3.06 to 3.59. Temperature from 20 to 30°C had little effects on the tetracycline adsorption in two soils. Thermodynamic parameters depict the exothermic nature of adsorption, and the process
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20

Xu, Ziwen, Shiquan Lv, Shuxiang Hu, et al. "Effect of Soil Solution Properties and Cu2+ Co-Existence on the Adsorption of Sulfadiazine onto Paddy Soil." International Journal of Environmental Research and Public Health 18, no. 24 (2021): 13383. http://dx.doi.org/10.3390/ijerph182413383.

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Paddy soils are globally distributed and saturated with water long term, which is different from most terrestrial ecosystems. To better understand the environmental risks of antibiotics in paddy soils, this study chose sulfadiazine (SDZ) as a typical antibiotic. We investigated its adsorption behavior and the influence of soil solution properties, such as pH conditions, dissolved organic carbon (DOC), ionic concentrations (IC), and the co-existence of Cu2+. The results indicated that (1) changes in soil solution pH and IC lower the adsorption of SDZ in paddy soils. (2) Increase of DOC facilita
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21

Zhang, Zhongqing, Qiang Gao, Jingmin Yang, et al. "The adsorption and mechanism of the nitrification inhibitor nitrapyrin in different types of soils." Royal Society Open Science 7, no. 9 (2020): 200259. http://dx.doi.org/10.1098/rsos.200259.

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The nitrapyrin was easily adsorbed by soil, but most current studies have focused on comparing the effects of nitrapyrin application at different soil organic matter levels and in different soil types. The adsorption kinetics and isotherm adsorption of the nitrification inhibitor nitrapyrin in black soil, chernozem and planosol were studied in this paper. The adsorption kinetics were fitted by quasi-second-order kinetic equation ( R 2 ≥ 0.8907, p < 0.05) with a lower acting energy of adsorption ( E a < 8.0 kJ mol −1 ). The isotherm was fitted by the Langmuir equation ( R 2 ≥ 0.9400 * , p
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22

Zainol, Maznah, Halimah Muhamad, Ismail Bin Sahid, and Idris Abu Seman. "Adsorption-Desorption of Hexaconazole in Soils with Respect to Soil Properties, Temperature, and pH." Turkish Journal of Agriculture - Food Science and Technology 4, no. 6 (2016): 493. http://dx.doi.org/10.24925/turjaf.v4i6.493-497.669.

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The effect of temperature and pH on adsorption-desorption of fungicide hexaconazole was studied in two Malaysian soil types; namely clay loam and sandy loam. The adsorption-desorption experiment was conducted using the batch equilibration technique and the residues of hexaconazole were analysed using the GC-ECD. The results showed that the adsorption-desorption isotherms of hexaconazole can be described with Freundlich equation. The Freundlich sorption coefficient (Kd) values were positively correlated to the clay and organic matter content in the soils. Hexaconazole attained the equilibrium p
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23

De Sousa, Edilvan Expedito, Fernando Cartaxo Rolim Neto, Brivaldo Gomes de Almeida, André Maciel Netto, Arnaldo Joaquim de Souza Junior, and Vijay P. Singh. "Effects of anionic polyacrylamide on the adsorption behavior and physical properties of cohesive soil in the northeastern coast of Brazil." Revista Brasileira de Geografia Física 18, no. 4 (2025): 3004–27. https://doi.org/10.26848/rbgf.v18.4.p3004-3027.

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This research examines the impact of anionic polyacrylamide (PAM) on the adsorption dynamics and physical properties of cohesive soils located in the Coastal Tablelands of Pernambuco, Brazil. Cohesive soils, known for their high density and restricted water infiltration, present significant challenges for agricultural productivity. Soil samples from different horizons (A, E, BE, and Bt) were treated with PAM to analyze its adsorption kinetics, isotherms, and its potential to decrease soil cohesion. The adsorption experiments fitted pseudo-first and pseudo-second-order kinetic models, revealing
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24

Lu, Weisheng, Ying Liu, Huike Ye, et al. "Adsorption and Desorption Characteristics of Cadmium on Different Contaminated Paddy Soil Types: Kinetics, Isotherms, and the Effects of Soil Properties." Sustainability 13, no. 13 (2021): 7052. http://dx.doi.org/10.3390/su13137052.

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The adsorption and desorption characteristics of cadmium (Cd) in uncontaminated soils have been investigated in numerous studies. However, similar studies on Cd-polluted soils from different sources, which exhibit complex physicochemical characteristics and internal interactions between Cd and the soil particles, are scarce. Therefore, in order to elucidate the adsorption and desorption characteristics of Cd in Cd polluted soils, six representative Cd-contaminated paddy soil samples were collected from farmlands in the vicinity of a steel plant (Soil 1), a smelter (Soil 2), a thermal power pla
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25

Shaw, David R., and Glen P. Murphy. "Adsorption and relative mobility of flumetsulam." Weed Science 45, no. 4 (1997): 573–78. http://dx.doi.org/10.1017/s0043174500088846.

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Laboratory studies were conducted to evaluate flumetsulam adsorption and mobility in seven Mississippi soils of different organic matter content, pH, and texture. Adsorption isotherms were determined for all soils using a 1:1 (soil: water) technique. In six of seven soils, Freundlichnconstants were close to unity, suggesting a partitioning-like adsorption mechanism for flumetsulam. Mobility was examined using packed soil columns.14C-flumetsulam recoveries in leachate ranged from 1 to 70% and were influenced by both organic matter content and soil pH. However, the effects of organic matter cont
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26

Kogan, Marcelo, Alejandra Metz, and Rodrigo Ortega. "Adsorption of glyphosate in chilean soils and its relationship with unoccupied phosphate binding sites." Pesquisa Agropecuária Brasileira 38, no. 4 (2003): 513–19. http://dx.doi.org/10.1590/s0100-204x2003000400010.

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The objective of this work was to investigate glyphosate adsorption by soils and its relationship with unoccupied binding sites for phosphate adsorption. Soil samples of three Chilean soils series - Valdivia (Andisol), Clarillo (Inceptisol) and Chicureo (Vertisol) - were incubated with different herbicide concentrations. Glyphosate remaining in solution was determined by adjusting a HPLC method with a UV detector. Experimental maximum adsorption capacity were 15,000, 14,300 and 4,700 mg g¹ for Valdivia, Clarillo, and Chicureo soils, respectively. Linear, Freundlich, and Langmuir models were us
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27

Galán-Pérez, Jose Antonio, Beatriz Gámiz, Ivana Pavlovic, and Rafael Celis. "Enantiomer-Selective Characterization of the Adsorption, Dissipation, and Phytotoxicity of the Plant Monoterpene Pulegone in Soils." Plants 11, no. 10 (2022): 1296. http://dx.doi.org/10.3390/plants11101296.

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Plant monoterpenes have received attention for their ecological functions and as potential surrogates for synthetic herbicides, but very little is known about the processes that govern their behavior in the soil environment, and even less about the possible enantioselectivity in the functions and environmental behavior of chiral monoterpenes. We characterized the adsorption and dissipation of the two enantiomers of the chiral monoterpene pulegone in different soils, and their phytotoxicity to different plant species through Petri dish and soil bioassays. R- and S-pulegone displayed a low-to-mo
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28

Li, Yang, Minghui Huang, Taiyan Yuan, Dehua Xu, Zhengjuan Yan, and Xinlong Wang. "Fertilizer Amount and Soil Properties Govern Differential Adsorption of Polyphosphate and Orthophosphate." Agriculture 15, no. 6 (2025): 585. https://doi.org/10.3390/agriculture15060585.

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The growing use of ammonium polyphosphate (APP) fertilizer requires an understanding of its soil transformation for sustainable phosphorus (P) management and environmental protection. This study investigated the adsorption characteristics of APP1 (two P species) and APP2 (seven P species) in six soils, comparing them with monoammonium phosphate (MAP). Results revealed that APP adsorption was greater than MAP under low P soil and/or low P addition condition, but was lower under high P soil and high P addition conditions. Generally, APP1 showed greater adsorption than APP2, except in laterite so
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29

Liu, Zhifeng, Xun Fang, Lingyuan Chen, Bo Tang, Fengmin Song, and Wenbin Li. "Effect of Acid–Base Modified Biochar on Chlortetracycline Adsorption by Purple Soil." Sustainability 14, no. 10 (2022): 5892. http://dx.doi.org/10.3390/su14105892.

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We used three purple soil (Hechuan, Jialing, and Cangxi) samples from the Jialing River basin as the research objects and added different proportions of an acid–base modified Alternanthera philoxeroides biochar (Cm) to the purple soil to study the effect of Cm on the adsorption of chlortetracycline (CTC) in the purple soil. The results indicated the following: (1) At 30 °C and pH = 6, the soil adsorption capacity increased with an increasing initial concentration of CTC. The maximum adsorption amount of CTC for each tested sample was in the range of 2054.63–3631.21 mg/kg, and the adsorption ca
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30

Ke, Xin, Guang Zhen Xu, Lin Lin Niu, Xin Zhao, Run Dong Li, and Yun Zhang. "Study on the Adsorption-Desorption Behavior of Cr in Soil as Affect by Zeolite." Advanced Materials Research 414 (December 2011): 32–38. http://dx.doi.org/10.4028/www.scientific.net/amr.414.32.

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Under laboratory simulation experimental model, through adding exogenous chromium and CaCl2 solution, we research adsorption, desorption characteristics of Cr in soils with or without fixative (zeolite). Research shows that: The soil with zeolite can increase adsorption capacity of soil for Cr, it can also reduce the desorption quantity of Cr. In thermodynamics experiment, Freundlich equation is one of the best model to describe adsorption、desorption characteristics for Cr in soil with or without zeolite.; In kinetics experiment, adding zeolite to soil could increase adsorption rate for Cr and
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Sarker, Tithi, Jannatun Nayeema, Joy Sarker, Mst Jannatul Ferdous, Mst Bushra Fatema, and Md Sadiqul Amin. "Phosphate Sorption Characteristics in Some Soils of Ganges Tidal Floodplains." Asian Journal of Soil Science and Plant Nutrition 10, no. 4 (2024): 288–300. http://dx.doi.org/10.9734/ajsspn/2024/v10i4404.

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A laboratory experiment was carried out with four representative soil series named Bajoa, Dumuria, Jhalakati, and Ghior which are collected from the Ganges tidal floodplain in Bangladesh where the main cropping pattern is rice-vegetables to determine the phosphorus adsorption. The selected physical and chemical properties of the soils were estimated in triplicate using standard methods. The highest phosphate sorption was found in Jhalakati soil using the Freundlich adsorption isotherm, in Bajoa soil using the Langmuir adsorption isotherm, and in Dumuria soil using the Temkin adsorption isother
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32

Gerritse, RG, J. Beltran, and F. Hernandez. "Adsorption of atrazine, simazine, and glyphosate in soils of the Gnangara Mound, Western Australia." Soil Research 34, no. 4 (1996): 599. http://dx.doi.org/10.1071/sr9960599.

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Sandy soils were sampled from second rotation sites of Pinus pinaster Ait. on the Gnangara Mound in Western Australia. Adsorption isotherms were measured for atrazine [6-chloro-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine], simazine [6-chloro-N,N'-diethyl-1,3,5-triazine-2,4-diamine], and glyphosate [N-phosphonomethyl-aminoaceticacid]. Adsorption isotherms were also measured for degradation products of atrazine: hydroxyatrazine [6-hydroxy-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine] (HA), desethylatrazine [6-chloro-N-isopropyl-1,3,5-triazine-2,4-diamine] (DEA); and of glyphosate: amino
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33

Wu, Caixia, Yungui Li, Mengjun Chen, et al. "Adsorption of Cadmium on Degraded Soils Amended with Maize-Stalk-Derived Biochar." International Journal of Environmental Research and Public Health 15, no. 11 (2018): 2331. http://dx.doi.org/10.3390/ijerph15112331.

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Biochar has been extensively proven to distinctively enhance the sorption capacity of both heavy metal and organic pollutants and reduce the related environmental risks. Soil pollution and degradation widely coexist, and the effect of biochar addition on adsorption behavior by degraded soils is not well understood. Four degraded soils with different degrees of degradation were amended with maize-stalk-derived biochar to investigate the adsorption of cadmium using batch methods. The maximum adsorption capacity (Qm) of degraded soil remarkably decreased in comparison with undegraded soil (5361 m
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34

AbdulKadium, Safa Mahdi, and Hadi Yasir Abbood Al-Janabi. "Selenium Adsorption as Influenced by Different Anions in some Middle Euphrates Soils." IOP Conference Series: Earth and Environmental Science 1060, no. 1 (2022): 012004. http://dx.doi.org/10.1088/1755-1315/1060/1/012004.

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Abstract Adsorption Selenium (Se) levels in soils may be changed by a variety of variables. such as compecting anion. Investigated adsorption behavior for two top soil different properties, aiming to describe selenium adsorption in selected centrial Iraq soils. (Awfi) Samples were collected comprising clayed soil, Which Se adsorption tests were performed on the samples. After a 72-hour reaction with increasing concentrations of Se(0-400 µg mL-1) added as Na2SeO4, adsorption was measured. In the presence of Sulphate and Phosphate, which are usually applied in an inorganic form to soils. Soil pr
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35

O., P. Bansal. "Effect of different organic material on lead adsorption in soils of Aligarh district." Journal of Indian Chemical Society Vol. 85, Jan 2008 (2008): 59–63. https://doi.org/10.5281/zenodo.5808536.

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Chemistry Department, D. S. College, Aligarh-202 001, Uttar Pradesh, India <em>E-mail :</em> drop31@rediffmail.com <em>Manuscript received 19 June 2006, revised 19 September 2007, accepted 25 September 2007</em> The effect of different organic material (FYM, sewage sludge and poultry litter) on adsorption-desorption of lead on three soil samples of Aligarh district was studied. The adsorption isotherms were of &#39;L&#39; type and adsorption-desorption data conformed to Freundlich isotherm equation. The adsorption increased with the increase in organic material and followed the order : sewage
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36

Golia, Evangelia E., Ourania-Despoina Kantzou, Maria-Anna Chartodiplomenou, Sotiria G. Papadimou, and Nikolaos G. Tsiropoulos. "Study of Potentially Toxic Metal Adsorption in a Polluted Acid and Alkaline Soil: Influence of Soil Properties and Levels of Metal Concentration." Soil Systems 7, no. 1 (2023): 16. http://dx.doi.org/10.3390/soilsystems7010016.

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In the present study, the adsorption of zinc (Zn), lead (Pb), copper (Cu), and cadmium (Cd) was studied in two already polluted urban soil samples with different pH values, an acidic and an alkaline one. The Langmuir and Freundlich adsorption isotherm equations were used to thoroughly study the adsorption of the metallic elements on the solid surface of the soils. Langmuir equation described the adsorption of each metal satisfactorily, with a slight predominance over Freundlich, in both soils, as the R2 value approached almost unity. Even though Zn and Cu were adsorbed on the soil phase, their
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37

Li, Leiming, and Jun Wu. "Lead and Chromium Immobilization Process Subjected to Different Freeze-Thaw Treatments in Soils of the Northeastern Qinghai-Tibet Plateau." Journal of Chemistry 2021 (October 21, 2021): 1–11. http://dx.doi.org/10.1155/2021/5286278.

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The freeze-thaw cycle is one of the important processes that affected heavy metal behaviors in soil. However, information regarding the adsorption and desorption behavior of heavy metals in soils under different freeze-thaw conditions is relatively less. Therefore, different freeze-thaw conditions including unfrozen, 15 freeze-thaw cycles at 60% water content, and 15 freeze-thaw cycles at 100% water content were investigated. Then the adsorption and desorption behaviors of Pb and Cr in freeze-thaw soils were studied. Results showed the Pb and Cr adsorption amount mostly decreased with increasi
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38

Gonçalves, Deyvison Andrey Medrado, Gilson Sergio Bastos de Matos, Antonio Rodrigues Fernandes, Katiane Raquel Mendes Barros, Danielle do Socorro Nunes Campinas, and Cristine Bastos do Amarante. "Adsorption of cadmium and copper in representative soils of Eastern Amazonia, Brazil." Semina: Ciências Agrárias 37, no. 5 (2016): 3005. http://dx.doi.org/10.5433/1679-0359.2016v37n5p3005.

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Studies of heavy metals adsorption in soil play a key role in predicting environmental susceptibility to contamination by toxic elements. The objective of this study was to evaluate cadmium (Cd) and copper (Cu) adsorption in surface and subsurface soil. Samples of six soils: Xanthic Hapludox (XH1 and XH2), Typic Hapludox (TH), Typic Rhodudalf (TR), Typic Fluvaquent (TF), and Amazonian dark earths (ADE) from Eastern Amazonian, Brazil. The soils were selected for chemical, physical and mineralogical characterization and to determine the adsorption by Langmuir and Freundlich isotherms. All soils
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Cazanga, Marcia, Marlen Gutierrez, Mauricio Escudey, Gerardo Galindo, Antonio Reyes, and Andrew C. Chang. "Adsorption isotherms of copper, lead, nickel, and zinc in two Chilean soils in single- and multi-component systems: sewage sludge impact on the adsorption isotherms of Diguillin soil." Soil Research 46, no. 1 (2008): 53. http://dx.doi.org/10.1071/sr07009.

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The potential impact of the addition of sewage sludge from domestic waste water treatment plants on agricultural soils is a worldwide concern. A proportion of heavy metals in sewage sludge will be present in the soil solution; their equilibria can be modified by the competitive interactions between them, changing not only their mobility but also their adsorption pattern. The competitive adsorption of heavy metals by soils has been studied by several authors in simple model substrates and synthetic minerals, and also in soils but restricted to binary adsorption. In the present paper the modific
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40

Tóth, Márton, and Ferenc Gubányi. "Determination of transport parameters of soils around Solt." Multidiszciplináris Tudományok 13, no. 2 (2023): 106–15. http://dx.doi.org/10.35925/j.multi.2023.2.10.

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A complex labor investigation was performed to determine the adsorption properties of soils around Solt. After collection of samples firstly the soil type was determined as a pre-information of adsorption tests. Two type of test were performed to know the adsorption performance of soils: batch test and breakthrough curve test. In both investigation two type of soil (SD, SV) and two type of heavy metals were investigated. In batch test the Langmuir and the Freundlich isotherms were used to determine the adsorption constants. According to our results the fitting of Freundlich isotherm was better
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41

Cichota, R., I. Vogeler, N. S. Bolan, and B. E. Clothier. "Cation influence on sulfate leaching in allophanic soils." Soil Research 45, no. 1 (2007): 49. http://dx.doi.org/10.1071/sr06070.

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We have examined the influence of the ionic composition of the soil solution on the movement of sulfate and calcium in 2 New Zealand soils with differing allophane content. For this study, we have carried out a series of miscible displacement experiments using repacked and intact soil columns, in which sulfate was applied in the presence of either calcium or potassium as the accompanying cation. Our results showed that sulfate leaching was significantly retarded in the soil with higher allophane content when applied with calcium. On the other hand, no effects were observed for all studied soil
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42

Malvar, José Luis, Juan Luis Santos, Julia Martín, Irene Aparicio, and Esteban Alonso. "Approach to the Dynamic of Carbamazepine and its Main Metabolites in Soil Contamination through the Reuse of Wastewater and Sewage Sludge." Molecules 25, no. 22 (2020): 5306. http://dx.doi.org/10.3390/molecules25225306.

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The release of pharmaceutically active compounds to the soils through the application of sewage sludge and the irrigation with wastewater, or even with surface water, is constant. The adsorption of these compounds onto the soil is one of the key factors affecting their fate in the environment and their potential environmental risks. In this work, the adsorption of carbamazepine (CBZ) and its metabolites, 3-hydroxy-carbamazepine (3OH-CBZ), carbamazepine-10,11-dihydro-10,11-epoxide (EP-CBZ), and 10,11-dihydro-10-hydroxycarbamazepine (10OH-CBZ), in three Mediterranean soils was evaluated using si
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43

Krishnasamy, R., and KK Krishnamoorthy. "Cationic interferences on zinc adsorption." Soil Research 29, no. 4 (1991): 527. http://dx.doi.org/10.1071/sr9910527.

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The effects of bivalent cations such as Mg2+, MN2+, FE2+ and Cu2+ on zinc adsorption in 16 surface soil samples (0-25 cm depth), representing major soil series of Tamil Nadu (India), and of the soil orders Vertisol and lnceptisol were studied. The study revealed that the interference of the four bivalent cations on zinc adsorption was in the order Cu2+ &gt; Mn2+ &gt; Me2 + &gt; Mg2+. The effects of these ions on zinc adsorption could be explained on the basis of chemical properties such as magnetic moment value, kinetic classification, crystal field stabilization energy (CFSE) and kinetics of
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44

Mostafa, Aly S., Dyaa M. Nassar, Mokhtar A. Abdul-Malik, et al. "Competitive adsorption/desorption of dimethoate pesticide and phosphorus fertilizer in texturally different soils." Soil and Environment 44, no. 1 (2025): 01–07. https://doi.org/10.25252/se/2025/253664.

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This study aims to comprehend the competitive and non-competitive adsorption/desorption of phosphorus fertilizer and dimethoate insecticide in clay soil and clay loam soil. Characterization of the examined soils was the first step in the process, which was followed by agrochemical non-competitive adsorption, competitive adsorption, and desorption from the soil samples. Dimethoate was more absorbed than phosphorus, according to non-competitive experiments. The addition of phosphorus considerably reduced the dimethoate's adsorption capacity on the soils under test. The adsorption rates of dimeth
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45

Nakayama, Chieko, and Yoshinori Tanaka. "Adsorption of nitrate as a groundwater pollutant by soil particles." Journal of Nepal Geological Society 34 (October 9, 2006): 141–46. http://dx.doi.org/10.3126/jngs.v34i0.31890.

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This study discusses nitrogen adsorption in several soil samples of the Kanto loam collected from two locations in the Kanto plain. Their chemical properties were assessed on each of the soil samples as well as on pure allophane clay by instrumental analysis using batch and soil column tests.&#x0D; Nitrogen-nitrate adsorption by soil samples was determined by a 10-hour batch test using a nitric acid solution of 0.14 mmol. A saturation column test was conducted to obtain a breakthrough curve and calculate the coefficients of dispersion and retardation. The extent of nitrate adsorption in soil s
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46

Singh, Dhirendra. "Effect of Different Factors on the Adsorption of Phosphamidon on Two Different Types of Indian Soil." Adsorption Science & Technology 16, no. 8 (1998): 583–94. http://dx.doi.org/10.1177/026361749801600801.

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The effect of exchangeable cations (H+ and Na+). autoclaving, organic matter, anionic surfactants and temperature on the adsorption of phosphamidon on two different types of Indian soil was studied. The adsorption isotherms for all the effects/treatments were in close agreement with the Freundlich equation and yielded S-shaped isotherms. The amount of phosphamidon adsorbed in all cases was higher in medium black (silt loam) soil than alluvial soil (sandy loam) and was related to the organic matter content, clay content, CaCO3 content, surface area and cation-exchange capacity of the soils. The
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47

Shi, Zhenqing, Herbert E. Allen, Dominic M. Di Toro, Suen-Zone Lee, and James B. Harsh. "Predicting PbII adsorption on soils: the roles of soil organic matter, cation competition and iron (hydr)oxides." Environmental Chemistry 10, no. 6 (2013): 465. http://dx.doi.org/10.1071/en13153.

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Environmental context Lead is a common and persistent soil and water contaminant. This study provides a unique set of parameters for chemical models that can be used for predicting Pb adsorption by soil. The suggested modelling approach can be used to quantitatively predict Pb retention and release in soils with changing environmental conditions. Abstract Lead (PbII) adsorption on 14 non-calcareous New Jersey soils was studied with a batch method. Both adsorption edge and adsorption isotherm experiments were conducted covering a wide range of soil compositions, Pb concentrations and solution p
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48

Lee, S. Z., L. Chang, C. M. Chen, Y. I. Tsai, and M. C. Liu. "Predicting soil-water partition coefficients for Hg(II) from soil properties." Water Science and Technology 43, no. 2 (2001): 187–96. http://dx.doi.org/10.2166/wst.2001.0089.

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The metal adsorption characteristics for fifteen Taiwan soils by Hg(II), were evaluated using pH as the major variable. The soil samples were thoroughly characterized for their physical chemical properties and composition, particularly organic matter and metal oxides. The adsorption of Hg(II) increased with increasing pH between pH 2.5 and 5.5, whereas the adsorption significantly decreased above around pH 5.5. Below pH 5.5, greater adsorption was found for soils with a higher organic matter content at constant pH and metal concentration. To better understand the mechanism of adsorption, the e
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Campillo-Cora, Claudia, Manuel Conde-Cid, Manuel Arias-Estévez, David Fernández-Calviño, and Flora Alonso-Vega. "Specific Adsorption of Heavy Metals in Soils: Individual and Competitive Experiments." Agronomy 10, no. 8 (2020): 1113. http://dx.doi.org/10.3390/agronomy10081113.

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The partitioning between the soil solid phase and the soil solution determines the mobility of pollutants like heavy metals. If nonspecific sorption takes place, the reactions are easily reversible and heavy metals are released to soil solution increasing the probability of leaching through soil profile. Mobility and leaching are also favoured if other metals are in the system and competition for specific adsorption sites takes place. In this study, desorption equilibrium experiments were conducted after adsorption ones. The specific adsorption was evaluated through the amounts of the still ad
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50

O., P. Bansal. "Effect of sewage sludge on carbamate pesticides adsorption in soils of Aligarh district." Journal of Indian Chemical Society Vol. 81, Jan 2004 (2004): 41–46. https://doi.org/10.5281/zenodo.5827781.

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Chemistry Department, D. S. College, Aligarh-202 001, India <em>Manuscript received 3 May 2001, revised 12 March 2003, accepted 19 June 2003</em> Adsorption of three carbamate pesticides (I, II, Ill) used as nematicide and herbicides has been determined from solutions of six soil samples of Aligarh District at three different temperatures. On all the six soil samples the adsorption of pesticides is in the order III &gt; I &gt; II. The adsorption isotherms are of L-type. The adsorptivity of the soils is in the order, soil No. 1 &gt; 2 &gt; 3 &gt; 4 &gt; 5 &gt; 6. The enthalpy change (∆<em>H</em
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