- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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The influence of soil properties on the individual and competitive sorption and desorption of Cu and Cd. Author links open overlay panel Beatriz Cerqueira, Emma F. Covelo, Luisa Andrade, Flora A. Vega. Show more. Add to Mendeley. Share. ... against the concentration of the metal in solution following desorption ...
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It breaks the bond between adsorbent-adsorbate and; liberate adsorbate from solution. Thereafter, this treated adsorbent is further undergone adsorption process. In desorption process, certain solution or solvent is called eluting agent. Desorption process is conducted by either batch or column treatment.
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This review explains desorption of heavy metals from metal loaded adsorbents and regeneration of adsorbents. Various desorbing eluents and their utilization in desorption of certain metals are compiled along with the techniques and setups followed to achieve better recovery and regeneration rates.
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The behavior in competitive adsorption-desorption reactions of Cu and Zn was studied in four calcareous soils. Cu and Zn were added to the soil by Cu, Zn, and Cu+Zn sulfate solutions in a CaSO4 background. Soil sorption of these cations was described by equilibrium isotherms that fitted either Freundlich- or Langmuir type …
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To assess the competitive sorption and desorption of cadmium (Cd) and lead (Pb), batch equilibrium experiments were performed using single- and binary-metal solutions in surface samples of three paddy soils from eastern China. Sorption isotherms were well fitted with one-metal and competitive Langmuir equation for single- and …
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The widespread usage of veterinary antibiotics results in antibiotic contamination and increases environmental risks. This study was evaluated the single and ternary competitive adsorption-desorption and degradation of three amphenicol antibiotics (AMs): chloramphenicol (CAP), thiamphenicol (TAP), and florfenicol (FF) in …
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Desorption of the adsorbed Hg 2+ in 0.01 M KCl (simulating soil solution) was minimal, but was significantly enhanced by the change of pH, and the presence of organic acids or competitive cations. The desorption of Hg 2+ in the soils
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The bioavailability and ultimate fate of heavy metals in the environment are controlled by adsorption-desorption process. Batch equilibrium experiments were performed to assess the effects of pH and low molecular weight organic acids (LMWOAs) on competitive adsorption and desorption of cadmium and lead in paddy soils from China.
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Investigating the interactions of heavy metals is imperative for sustaining environment and human health. Among those, Cd is toxic for organisms at any concentration. While Ni acts as a micronutrient at very low concentration but is hazardous toxic above certain threshold value. In this study, the chemical adsorption and …
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This allowed us to know if native heavy metals in soils were released in the sorption and desorption experiments, and therefore if the background solution extracted the heavy metals already present in soils. Sorption and desorption data were fitted with Langmuir and Freundlich models [34].
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adsorption were significantly reduced when PO4-3 concentrations in the soil solution increased. In addition, the relative sorption preference of AsO4-3 and PO4-3 did not exhibit changes with reaction time. Desorption and sequential extractions results indicated that a significant amount of AsO4-3 was irreversibly retained by all soils.
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Keywords competitive adsorption, desorption, copper, lead, soil 1 Introduction Rapidindustrializationand urbanizationhavebeenleading ... (pH 5.0) desorption solution was included in the experiment. 2.4 Adsorption and desorption of Pb(II) and Cu(II) in the mixed solutions
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In this experiment we investigated the influence of various anions including oxalic acid encountered as solution phase in soil on the adsorption and desorption of sulfate in Chungwon Bt soil. The effect of chloride and nitrate on the adsorption of sulfate was not significant, suggesting that sulfate was better able to compete for adsorption …
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Desorption is as important as sorption from an ecological and economic perspective for possible remobilization and recycling of waste containing high amounts of PTMs. The percentages of contaminants released from peat, compost, and biochar by different desorption solutions are shown in Fig. 5 and Tables S5–S8.
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