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| Combination effects of pH, solution/soil ratio and inherent organic matter on the adsorption of tetracycline by sediments |
| Received:October 25, 2016 |
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| KeyWord:tetracycline;sediment;solution/soil ratios;pH;organic matter |
| Author Name | Affiliation | E-mail | | LI Zong-chen | College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
Institute of Urban Environment, The Chinese Academy of Sciences, Xiamen 361021, China
State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China | | | WEI Qun-shan | College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
Institute of Urban Environment, The Chinese Academy of Sciences, Xiamen 361021, China
State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China | qswei@dhu.edu.cn | | LUO Zhuan-xi | Institute of Urban Environment, The Chinese Academy of Sciences, Xiamen 361021, China | | | XU Long-feng | College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China | | | LIU Ya-nan | College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China | | | YAN Chang-zhou | Institute of Urban Environment, The Chinese Academy of Sciences, Xiamen 361021, China | czyan@iue.ac.cn | | LIU Jian-she | College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China | |
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| Abstract: |
| To understand the characteristic and mechanism of antibiotics migration in the aquatic environment influenced by sediment adsorption more clearly, this present study investigated the combination effects of pH, solution/soil ratio and inherent organic matter on the adsorption of tetracycline(TC) by sediments taken from Jiulong River. Composite effects of solution/soil ratio and pH on the adsorption was investigated by batch sorption experiments with different solution/soil ratio and pH value. The effects of inherent organic matter on the adsorption at different solution/soil ratio and pH conditions were also reseached by batch sorption experiments with initial concentration of TC in the range of 20~100 mg·L-1. The results showed that the sorption of TC by sendiment was strongly pH-dependent, of which the adsorption efficiency reached the maximum value at the pH rang of 3~5. Moreover, the adsorption efficiency decreased with pH increasing. The variety of solution/soil ratios changed the optimum pH value at which the maximum adsorption efficiency reached, i.e. The maximum adsorption efficiencies were all reached at the optimum pH 3 when solution/soil ratio was 0.25 and 0.125 with the maximum value 95.3% and 96.8%, respectively. While the optimum pH value was changed to pH 5 when solution/soil ratio was 0.5(The maximum adsorption efficiency was decreased to 82.82%). The reason may be that the main way of adsorption was changed from cation exchange to combination of ion exchange and complexation. Furthermore, the effect of the inherent organic matter of the sendiment could promote or inhibit the sorption of TC depending on the different pH, TC fractions, equilibrium concentrations and other conditions. |
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