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| Effects of biochar on the adsorption and degradation of clothianidin in soil |
| Received:April 25, 2019 |
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| KeyWord:biochar;clothianidin;soil;adsorption;degradation |
| Author Name | Affiliation | E-mail | | SHAO Yi-fei | School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China | | | ZHANG Peng | College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China | | | LIU Ai-ju | School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255000, China | aijvliu@sdut.edu.cn |
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| Abstract: |
| In the present study, the effects of biochar on the soil properties and adsorption-degradation of clothianidin in black soil were explored. The biochar was obtained by pyrolyzing maize straw and pig manure at 300, 500, and 700℃. The results indicated that the pH, available P, and organic carbon of the biochar-soil mixtures were all significantly increased, while H/C decreased. The Freundlich isotherm was suitable for describing the clothianidin adsorption to soil and biochar-soil mixtures. Biochar addition significantly increased the adsorption of clothianidin, with a stronger effect at higher pyrolyzing temperature(PT). Biochar generally promoted an increase in the degradation rate of clothianidin in biochar-soil mixtures. The biochar amendments obtained at a high-PT inhabited the biodegradation of clothianidin, whilst the low-PT biochar promoted the biodegradation of clothianidin. Therefore, the type and properties of biochar should be considered during soil pesticide remediation. |
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