Effect of organic wastes on the plant-microbe remediation for removal of aged PAHs in soils

查看全文 作　　者：Jing [1,2]Zhang;Xiangui [1,2]Lin;Weiwei [3]Liu;Yiming [1,2]Wang;Jun [1,2]Zeng;Hong [1]Chen

机构地区：[1]State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;[2]Joint Open Laboratory of Soil and Environment,Institute of Soil Science and Hong Kong Baptist University,Nanjing 210008,China;[3]College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China

出　　处：《Journal of Environmental Sciences》索引2012年第24卷第8期,共7页

基　　金：supported by the National Natural Science Foundation of China (No. 40801091);the Ministry of Science and Technology of China (No. 2007AA061101) 摘　　要：The effectiveness of in-situ bioremediation of polycyclic aromatic hydrocarbons(PAHs) may be inhibited by low nutrients and organic carbon.To evaluate the effect of organic wastes on the PAHs removal efficiency of a plant-microbe remediation system,contaminated agricultural soils were amended with different dosages of sewage sludge(SS) and cattle manure(CM) in the presence of alfalfa(Medicago sativa L.) and PAHs-degraders(Bacillus sp.and Flavobacterium sp.).The results indicated that the alfalfa mean biomasses varied from 0.56 to 2.23 g/pot in root dry weight and from 1.80 to 4.88 g/pot in shoot dry weight.Low dose amendments,with rates of SS at 0.1% and CM at 1%,had prominent effects on plant growth and soil PAHs degradation.After 60-day incubation,compared with about 5.6% in the control,25.8% PAHs removal was observed for treatments in the presence of alfalfa and PAHs-degraders;furthermore,when amended with different dosages of SS and CM,the removed PAHs from soils increased by 35.5%-44.9% and 25.5%-42.3%,respectively.In particular,the degradation of high-molecular-weight PAHs was up to 42.4%.Dehydrogenase activities(DH) ranged between 0.41 and 1.83 μg triphenylformazan/(g dry soil·hr) and the numbers of PAHs-degrading microbes(PDM) ranged from 1.14×10 6 to 16.6×10 6 most-probable-number/g dry soil.Further investigation of the underlying microbial mechanism revealed that both DH and PDM were stimulated by the addition of organic wastes and significantly correlated with the removal ratio of PAHs.In conclusion,the effect of organic waste application on soil PAHs removal to a great extent is dependent on the interactional effect of nutrients and dissolved organic matter in organic waste and soil microorganisms. 关键词：多环芳烃农业土壤微生物修复有机废物植物生长 PAHS 紫花苜蓿老年

相关文献

参考文献（56）
引证文献（13）
耦合文献（0）

参考文献(56)

引证文献(13)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Effect of organic wastes on the plant-microbe remediation for removal of aged PAHs in soils

参考文献(56)

引证文献(13)

用户提示