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[1]ZHANG Jing,CUI Xiangxin,YUE Zhengwen,et al.Study on Adsorption Properties of Copper Ion by Salix Biochar in the Soil of Mining Area[J].Research of Soil and Water Conservation,2018,25(01):270-275.

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Study on Adsorption Properties of Copper Ion by Salix Biochar in the Soil of Mining Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 270-275 Column: Public date: 2018-02-28

Title:: Study on Adsorption Properties of Copper Ion by Salix Biochar in the Soil of Mining Area

Author(s):: ZHANG Jing¹, CUI Xiangxin¹, YUE Zhengwen², DANG Xiaohong¹, ZHANG Bo³, CHEN Jing¹; 1. Desert Science and Engineering College Of Inner Mongolia Agricultural University, Hohhot 010010, China;
2. Institute Of Water Resources for Pastoral Area, MWR, Hohhot 010019, China;
3 Environmental Protection Bureau of Erdos City, Erdos, Inner Mongolia 017000, China

Keywords:: grassland mining area; Salix biochar; Cu²⁺; adsorption characteristics

CLC:: X13;X703

DOI:: -

Abstract:: In order to study the effect of biochar on the restoration of the copper polluted soil in mining area of grassland. Based on basis of actual investigation, with Cu²⁺ as the pollute source, Salix biochar as repair materials, this study explored the adsorption properties of Cu²⁺ on Salix biochar. The results showed that pseudo-second-order model, the intraparticle diffusion model and Freundlich adsorption isotherm model, Temkim adsorption isotherm model were more suitable to describe the adsorption kinetic (R² > 0.99) and isothermal adsorption process (R² > 0.56) of Cu²⁺ on Salix biochar. So, the adsorption process is not single, but is a complex adsorption process. The maximum adsorption capacity of Salix biochar in Cu²⁺ solution was 19.13 mg/g. Weak acid environment was propitious to the adsorption of Cu²⁺ by Salix biochar. When the adsorption time was 16 h, the adsorption quantity and the adsorption rate of Cu²⁺ by Salix biochar all reached the peak values, and no longer increased with increased of absorption time. Other finding showed that the adsorption quantity and adsorption rate of Salix biochar were significantly positively correlated with adsorption time and solution pH (p < 0.05), respectively.

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