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| Degradation of soil atrazine by magnetic biochar coupled with functional bacteria pellet |
| Received:July 18, 2023 |
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| KeyWord:atrazine;DNS32 degrading bacteria;magnetic biochar;immobilization technology;soil remediation |
| Author Name | Affiliation | E-mail | | WEI Shuqi | School of Resources and Environment, Northeast Agricultural University, Harbin 150010, China | | | LI Ziwei | School of Resources and Environment, Northeast Agricultural University, Harbin 150010, China | | | WU Zhihuan | School of Resources and Environment, Northeast Agricultural University, Harbin 150010, China | | | BI Fuxuan | School of Resources and Environment, Northeast Agricultural University, Harbin 150010, China | | | WANG Siqi | School of Resources and Environment, Northeast Agricultural University, Harbin 150010, China | | | MENG Qingjuan | School of Resources and Environment, Northeast Agricultural University, Harbin 150010, China | mengqingjuan@neau.edu.cn |
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| Abstract: |
| In this study, magnetic biochar and DNS32 were embedded and immobilized with sodium alginate to form magnetic biological pellets（DMBC-P）, which were used to remediate atrazine-contaminated soil. Furthermore, their ability to remove atrazine and the mechanism by which they alleviated atrazine stress on soybean seedlings were explored. The results showed that DMBC-P had the strongest atrazine removal ability when the sodium alginate and calcium chloride content was 2%. At a DMBC-P dosage of 2%, temperature of 30 ℃, and pH of 7.3, the atrazine removal efficiency reached 99.99%. DMBC-P also exhibited excellent atrazine removal performance under the conditions of pH 3.3–7.3, temperatures of 10–50 ℃, and atrazine concentrations of 30–140 mg L-1, and it could be effectively recycled. Pot experiment results showed that the physiological indexes of soybean seedlings after DMBC-P remediation were significantly higher than those under CK treatment, and the contents of chlorophyll a, chlorophyll b, carotenoid, and total chlorophyll were increased by 79.14%, 45.48%, 67.87%, and 110.87%, respectively. The results show that DMBC-P applied to contaminated soil can efficiently remove atrazine and effectively recover materials. It is a suitable contaminated soil remediation material with great research potential. |
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