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| Effect of long-term application of biochar on Cd adsorption and bioavailability in farmland soils |
| Received:January 14, 2020 |
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| KeyWord:long-term application;biochar;bioavailability;Cd content;rice;wheat |
| Author Name | Affiliation | E-mail | | ZHANG Ying | School of Resources and Environmental Engineering, Anhui University, Hefei 230000, China
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Mine Ecological Restoration Engineering Laboratory of Anhui University, Hefei 230000, China | | | WU Ping | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | SUN Qing-ye | School of Resources and Environmental Engineering, Anhui University, Hefei 230000, China
Mine Ecological Restoration Engineering Laboratory of Anhui University, Hefei 230000, China | sunqingye@ahu.edu.cn | | SUN Qian | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | WANG Yu | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | WANG Shen-qiang | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | WANG Yu-jun | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | yjwang@issas.ac.cn |
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| Abstract: |
| This study investigated the adsorption and desorption of Cd on farmland soils with long-term application of biochar and explored the effect of biochar on the bioavailability of Cd in the soil in combination with long-term field trials of rice and wheat rotation. The results of experiments showed that compared with the control farmland soil, the larger the amount of biochar applied, the stronger the Cd adsorption and fixation capacity of the corresponding treated soil had. This was mainly due to the fact that the addition of biochar could increase the pH, cation exchange capacity, and organic matter content of the farmland soil, thereby reducing the exchangeable content of Cd in the soil and further inhibiting the migration of Cd from the soil into rice and wheat. The results provide theoretical guidance and technical support for Cd-contaminated soil remediation. |
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