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 pellets

作　　者：魏书奇 李梓玮 吴志欢 毕馥漩 王思琪 孟庆娟[1] WEI Shuqi;LI Ziwei;WU Zhihuan;BI Fuxuan;WANG Siqi;MENG Qingjuan(School of Resources and Environment,Northeast Agricultural University,Harbin 150010,China)

机构地区：[1]东北农业大学资源与环境学院,哈尔滨150010

出　　处：《农业环境科学学报》2024年第5期1067-1076,共10页Journal of Agro-Environment Science

基　　金：黑龙江省土壤保护与修复重点实验室项目。

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。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.

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 

分 类 号：X53[环境科学与工程—环境工程]