摘要
通过向污染土壤中引入外源微生物(菌株A、菌株B、菌株C)及补充营养物质(氮源质量分数0.1%、磷源质量分数0.05%),结合温度、湿度和氧气体积分数的调控,系统分析了生物修复及强化技术对有机污染物降解的效果。在温度30℃、湿度90%、氧气体积分数20%的优化条件下,苯并[a]芘和多环芳烃的降解率分别达到了92.5%和93.9%,显著高于10℃、30%湿度、5%氧气体积分数条件下的58.3%和60.5%。微生物群落分析结果表明,修复过程中菌株F和菌株G逐渐成为优势菌群,其相对丰度分别达到30%和20%,对污染物降解起到了关键作用。此外,副产物监测结果表明,短链有机酸的质量浓度在第30天达到1.2 mg∙L^(-1),随后在第60天降至0.6 mg∙L^(-1),表明二次污染风险逐渐降低。
The effects of bioremediation and enhancement technologies on the degradation of organic pollutants were systematically analyzed by introducing exogenous microorganisms(strain A,strain B,strain C)and supplementing nutrients(mass fraction 0.1%nitrogen source,mass fraction 0.05%phosphorus source)into the polluted soil,in combination with the regulation of temperature,humidity,and oxygen volume fraction.Under the optimized conditions of 30℃,90%humidity,and 20%oxygen volume fraction,the degradation rates of benzo[a]pyrene and polycyclic aromatic hydrocarbons reached 92.5%and 93.9%,respectively,which were significantly higher than 58.3%and 60.5%observed under 10℃,30%humidity,and 5%oxygen volume fraction.Microbial community analysis results showed that during the remediation process,strain F and strain G gradually became dominant microbial species,with relative abundances of 30%and 20%,respectively,playing a key role in pollutant degradation.Additionally,byproduct monitoring results indicated that the mass concentration of short-chain organic acids peaked at 1.2 mg∙L^(-1) at 30 d,and subsequently decreased to 0.6 mg∙L^(-1) at 60 d,indicating a reduction in the risk of secondary pollution.
作者
王萍
施宇震
WANG Ping;SHI Yuzhen(Faculty of Environmental Science and Engineering,KUST,Kunming Yunnan 650500,China)
出处
《当代化工》
2025年第11期2748-2752,2757,共6页
Contemporary Chemical Industry
基金
云南省住房和城乡建设厅科研开发项目(项目编号:K00000171)。
关键词
土壤
污染
测量
生物修复
环境
酶
强化技术
Soil
Pollution
Measurement
Bioremediation
Environment
Enzyme
Enhancement Technology
