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| Effects of combination treatments of mercapto palygorskite and hematite on remediation of Cd-As contaminated soil |
| Received:April 19, 2023 |
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| KeyWord:mercapto palygorskite;hematite;rice;cadmium–arsenic co-contamination;soil |
| Author Name | Affiliation | E-mail | | JING Rui | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | PEI Nan | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | DI Xuerong | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LIANG Xuefeng | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | QIN Xu | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | PENG Yunying | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | XU Yingming | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | HUANG Qingqing | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | SUN Yuebing | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | sunyuebing2008@126.com |
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| Abstract: |
| A pot experiment was performed to investigate the remediation effects of single and combination treatments of mercapto palygorskite（MPAL）and hematite（Fe2O3）on Cd–As contaminated soil. The soil pH value, availability and speciation distribution of Cd and As in the soil, biomass of different parts of rice, and contents of Cd, As, and Fe in the rice parts were determined. The results showed that all treatments significantly increased the biomass of rice grains by 2.37 – 2.45 times in comparison to the control. The DTPA-Cd content in the soil was reduced by 16.94%–22.57%（P<0.05）. The combination treatment of MPAL and Fe2O3 increased the proportion of amorphous iron oxide-bound Cd/As in the soil, as demonstrated by sequential extraction results. The combination treatment significantly reduced Cd and As concentrations in roots by 7.14% and 25.13%, respectively. All treatments reduced the Cd concentration in grain by 40.00%–60.00%, but they had no significant effect on the As concentration in grain. These results showed that combination treatment of MPAL and Fe2O3 can effectively reduce the available Cd and As contents in soil and the Cd and As concentrations in rice, indicating that the combination treatment has potential application value for remediation and safe utilization of Cd–As contaminated farmland. |
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