文章摘要
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
作者单位E-mail
魏书奇 东北农业大学资源与环境学院, 哈尔滨 150010  
李梓玮 东北农业大学资源与环境学院, 哈尔滨 150010  
吴志欢 东北农业大学资源与环境学院, 哈尔滨 150010  
毕馥漩 东北农业大学资源与环境学院, 哈尔滨 150010  
王思琪 东北农业大学资源与环境学院, 哈尔滨 150010  
孟庆娟 东北农业大学资源与环境学院, 哈尔滨 150010 mengqingjuan@neau.edu.cn 
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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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