摘要
通过土壤微宇宙培养试验,研究了锯末尺寸、添加量和种类等因素对荧蒽特效降解菌MC(Mycobacterium flavescens)修复污染土壤(潮土、红壤、黑土、黄棕壤和水稻土)的效果。结果表明:锯末联合降解菌MC修复荧蒽污染的黄棕壤效果较好,优化条件下25 d荧蒽降解率为42.63%±1.05%;该联合修复对黑土和红壤中荧蒽降解也有显著促进作用,但对潮土和水稻土中荧蒽降解没有促进作用。黑土和潮土自身微生物群落对荧蒽有很好的降解作用,红壤较低的酸碱性导致降解菌MC的加入不能够很好地降解荧蒽。由此,针对不同类型土壤中相同污染物的修复技术应该相应调整,才能达到节省成本促进降解去除的效果。
By means of microcosm experiments,we investigated the effects of sawdust on the remediation of fluoranthene and Pyrene contaminated soil together with Mycobacterium flavescens(MC).The effects of sawdust size,added amount and origin sources on the remediation of fluoranthene contaminated soil with MC were investigated.The results showed that:sawdust could improve the remediation efficiency of MC on soils,including yellow-brown soil,black soil and red soil.The microbial communities of black soil and fluvo aquic soil had a good degradation effect on fluoranthene,and the low pH of red soil led to the addition of degradation bacteria MC could not degrade fluoranthene well.
作者
陈晓芳
高娟
CHEN Xiaofang;GAO Juan(Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008)
出处
《土壤》
CAS
CSCD
北大核心
2022年第1期121-127,共7页
Soils
基金
国家重点研发计划项目纳米专项(2017YFA0207000)
国家自然科学基金面上项目(41773125)和国家自然科学基金重大研究计划项目(41991331)资助。
关键词
持久性有机污染物
荧蒽
锯末
生物修复
土壤类型
Persistent organic pollutants
Fluoranthene
Sawdust
Bioremediation
Soil type
