Degradation of soil atrazine by magnetic biochar coupled with functional bacteria pellets
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.
万方数据
维普
