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Adsorption characteristics and influencing factors of copper oxide nanoparticles in soil |
CHEN Xiao-chen1,2, ZHANG Chun-peng1, YUAN Zi-rui1, WANG Kai-yu2, ZHANG Jian-yu3, YANG Chao-ge1 |
1. Key Laboratory of Groundwater Resources and Environment, Jilin University, Changchun 130021, China; 2. Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350108, China; 3. Jiangsu Longchang Chemical Co., Ltd., Rugao 226532, China |
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Abstract The adsorption characteristics of CuO NPs in soil were investigated by static adsorption experiments. The effects of CuO NPs initial concentration, soil with different properties and pH on soil adsorption of CuO NPs were explored, and the interactions between co-existing organic pollutants (phenanthrene) and CuO NPs and the effects of phenanthrene on soil adsorption of CuO NPs were clarified. The results showed that the adsorption of CuO NPs in soil was in accordance with the pseudo-secondary reaction kinetic model. The dissolution and stabilization of CuO NPs by humic acid and organic matter resulted in low adsorption of CuO NPs by soil. The lowest adsorption of CuO NPs by soil occurred at neutral pH. The presence of phenanthrene occupied some adsorption sites and thus reduced the adsorption of CuO NPs by soil, and the equilibrium adsorption of CuO NPs at initial concentrations of 30 and 50mg/L decreased by 37.3% and 24.7%, respectively, but the presence of phenanthrene did not affect the adsorption process of CuO NPs.
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Received: 18 January 2023
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