多环芳烃污染土壤的植物-微生物联合修复初探

被引:63
作者
刘魏魏 [1 ,2 ,3 ]
尹睿 [1 ,2 ]
林先贵 [1 ,2 ]
张晶 [1 ,2 ]
陈效民 [3 ]
李占胜 [3 ]
李烜桢 [1 ,2 ]
肖艳平 [1 ,2 ]
机构
[1] 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)
[2] 中国科学院南京土壤研究所-香港浸会大学土壤与环境联合开放实验室
[3] 南京农业大学资源与环境科学学院
基金
国家高技术研究发展计划(863计划);
关键词
多环芳烃; 污染土壤; 紫花苜蓿; 菌根真菌; 多环芳烃专性降解菌;
D O I
10.13758/j.cnki.tr.2010.05.001
中图分类号
X172 [环境微生物学]; X53 [土壤污染及其防治];
学科分类号
083001 [环境科学];
摘要
在温室盆栽条件下,通过种植紫花苜蓿单独或联合接种菌根真菌(Glomus caledonium L.)(AM)和多环芳烃专性降解菌(DB),研究了利用植物-微生物强化修复多环芳烃(PAHs)长期污染土壤的效果。试验结果表明,接种菌根真菌和PAHs专性降解菌能促进紫花苜蓿的生长和土壤中PAHs的降解。经过90天修复试验,种植紫花苜蓿接种AM、DB和DB+AM处理的PAHs的降解率分别为47.9%、49.6%、60.1%,均高于只种植紫花苜蓿的对照处理(CK)(21.7%)。另外,随着PAHs苯环数的增加,其平均降解率逐渐降低,但是接种PAHs专性降解菌能够提高4环和5环PAHs的降解率。同时也发现土壤中脱氢酶活性和PAHs降解菌数量越高的处理,土壤PAHs的降解率也越高,这也是种植紫花苜蓿接种微生物能够有效促进土壤PAHs降解的原因。
引用
收藏
页码:800 / 806
页数:7
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