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| Cosorption of Cu2+ and atrazine on soil |
| Received:January 26, 2016 |
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| KeyWord:Cu2+;atrazine;cosorption;adsorption;soil |
| Author Name | Affiliation | E-mail | | CHEN Cheng | School of Chemistry and Life Science, Chengdu Normal University, Chengdu 611130, China
State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China | | | LIU Ting-feng | State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China | | | SUN Cheng | State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China | envidean@nju.edu.cn |
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| Abstract: |
| Batch adsorption experiments were conducted to investigate cosorption behavior of atrazine (AT) and Cu2+ on soil. Results showed that the presence of Cu2+ significantly decreased AT adsorption on soil and the adsorption data of AT could be well described by Freundlich model (R2=0.9669). The addition of AT also reduced the adsorption amount of Cu2+ on soil, with reduction effect being greater at lower AT concentrations (< 5 mg·L-1). This might be contributed to the formation of AT-Cu2+ complex, resulting in a decrease of competitive adsorption. Langmuir equation was the most appropriate model for the adsorption process of Cu2+ under the presence of AT. When AT coexisted with Cu2+, the adsorption of both AT and Cu2+ was positively related with organic matter, which was very consistent with the result of single pollution. However, the adsorption capacities of both AT and Cu2+ were reduced by increasing ionic strength, whereas the effect was opposite when AT existed alone. The adsorption amount of Cu2+ was not very affected by pH, may due to the complex formation and buffering action of soil. |
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