有机氯农药对土壤生态污染的影响及生物强化修复研究

Effects of Organochlorine Pesticides on Soil Ecological Pollution and Bioenhanced Remediation

有机氯农药性质稳定,虽已禁用数十年,但在土壤中仍然存在一定的污染残留。为了改善有机氯农药对土壤的生态污染情况,研究有机氯农药对土壤生态污染的影响及生物强化修复方法。选取农药厂旧址作为研究地点,分析生物强化修复技术对土壤生态污染的作用。选取枯草芽孢杆菌作为生态强化修复技术的菌种,采用基因工程菌种方式,降解土壤中有机氯农药。研究结果表明,生物强化修复技术对土壤中的六氯环己烷、DDD、DDE等有机氯农药降解效果明显,受污染土壤中,六氯环己烷和DDT的去除率均高于96%,具有修复有机氯农药土壤生态污染的作用。

Organochlorine pesticides have stable properties and have been banned for decades,but there are still certain pollution residues in the soil.In order to improve the ecological pollution of soil caused by organochlorine pesticides,this study investigates the impact of organochlorine pesticides on soil ecological pollution and the methods of bioenhanced remediation.Selecting the old site of a pesticide factory as the research site,the paper analyzes the effect of bio enhanced remediation technology on soil ecological pollution.Bacillus subtilis is selected as the strain for ecological reinforcement remediation technology,and genetic engineering strains are used to degrade organic chlorine pesticides in soil.The research results indicate that the bioenhanced remediation technology has a significant effect on the degradation of organochlorine pesticides such as hexachlorocyclohexane,DDD,and DDE in soil.In polluted soil,the removal rates of hexachlorocyclohexane and DDT are all higher than 96%,indicating that it has the ability to remediate soil ecological pollution caused by organochlorine pesticides.