| 魏书奇,李梓玮,吴志欢,毕馥漩,王思琪,孟庆娟.磁性炭基菌球降解土壤阿特拉津性能的研究[J].农业环境科学学报,2024,43(5):1067-1076. |
| 磁性炭基菌球降解土壤阿特拉津性能的研究 |
| Degradation of soil atrazine by magnetic biochar coupled with functional bacteria pellet |
| 投稿时间：2023-07-18 |
| DOI：10.11654/jaes.2023-0570 |
| 中文关键词: 阿特拉津 DNS32降解菌 磁性生物炭 固定化技术 土壤修复 |
| 英文关键词: atrazine DNS32 degrading bacteria magnetic biochar immobilization technology soil remediation |
| 基金项目:黑龙江省土壤保护与修复重点实验室项目 |
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| 摘要点击次数: 367 |
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| 中文摘要: |
| 本研究通过海藻酸钠包埋磁性生物炭与降解菌DNS32形成磁性炭基菌球（DMBC-P），并将其用于阿特拉津（ATZ）污染土壤的修复，探讨其去除ATZ的效能及促进大豆幼苗生长的能力。研究表明，当海藻酸钠与氯化钙的浓度为2%时，DMBC-P对ATZ的去除能力最强。在DMBC-P投加量为2%、温度为30 ℃、pH=7.3时，其对水体中ATZ的去除率可达到99.99%；并且在pH为3.3~7.3、温度为10~50 ℃以及ATZ浓度为30~140 mg·L-1的环境中，DMBC-P对ATZ的去除性能仍然十分优异且其可以被有效回收。盆栽试验结果表明，施用DMBC-P进行修复后，该处理下大豆幼苗的生理指标显著高于空白对照处理，叶绿素a、叶绿素b、类胡萝卜素和总叶绿素含量分别提高79.14%、45.48%、67.87%和110.78%。研究表明，DMBC-P施用于污染土壤中能够实现ATZ的高效去除和材料有效回收，是一种极具潜力的污染土壤修复材料。 |
| 英文摘要: |
| 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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