Tenax extraction for exploring rate-limiting factors in methyl-beta-cyclodextrin enhanced anaerobic biodegradation of PAHs under denitrifying conditions in a red paddy soil

	Tenax extraction for exploring rate-limiting factors in methyl-beta-cyclodextrin enhanced anaerobic biodegradation of PAHs under denitrifying conditions in a red paddy soil
	Sun, Mingming 1,2; Ye, Mao 3; Hu, Feng 1; Li, Huixin 1; Teng, Ying 2; Luo, Yongming4 ; Jiang, Xin 3; Kengara, Fredrick Orori 5
发表期刊	JOURNAL OF HAZARDOUS MATERIALS
	2014-01-15
卷号	264 页码:505-513
关键词	Polycyclic Aromatic Hydrocarbons Anaerobic Biodegradation Nitrate Methyl-beta-cyclodextrin Tenax Ta Rate-limiting Factors
英文摘要	The effectiveness of anaerobic bioremediation systems for PAH-contaminated soil may be constrained by low contaminants bioaccessibility due to limited aqueous solubility and lack of suitable electron acceptors. Information on what is the rate-limiting factor in bioremediation process is of vital importance in the decision in what measures can be taken to assist the biodegradation efficacy. In the present study, four different microcosms were set to study the effect of methyl-beta-cyclodextrin (MCD) and nitrate addition (N) on PAHs biodegradation under anaerobic conditions in a red paddy soil. Meanwhile, sequential Tenax extraction combined with a first-three-compartment model was employed to evaluate the rate-limiting factors in MCD enhanced anaerobic biodegradation of PAHs. Microcosms with both 1% (w/w) MCD and 20 mM N addition produced maximum biodegradation of total PAHs of up to 61.7%. It appears rate-limiting factors vary with microcosms: low activity of degrading microorganisms is the vital rate-limiting factor for control and MCD addition treatments (CK and M treatments); and lack of bioaccessible PAHs is the main rate-limiting factor for nitrate addition treatments (N and MN treatments). These results have practical implications for site risk assessment and cleanup strategies. (C) 2013 Elsevier B.V. All rights reserved.
文章类型	Article
收录类别	SCI
语种	英语
关键词[WOS]	POLYCYCLIC AROMATIC-HYDROCARBONS ; CONTAMINATED SOIL ; PHENANTHRENE BIODEGRADATION ; ORGANIC-COMPOUNDS ; DEGRADATION ; BIOAVAILABILITY ; AVAILABILITY ; DESORPTION ; CREOSOTE ; FATE
研究领域[WOS]	Engineering ; Environmental Sciences & Ecology
WOS记录号	WOS:000331021200059
引用统计	被引频次：34[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/9074
专题	中国科学院海岸带环境过程与生态修复重点实验室
作者单位	1.Nanjing Agr Univ, Coll Resources & Environm Sci, Soil Ecol Lab, Nanjing 210095, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China 4.Chinese Acad Sci, Yantai Inst Costal Zone Res, Yantai 264003, Peoples R China 5.Maseno Univ, Dept Chem, Maseno 40105, Kenya
推荐引用方式 GB/T 7714	Sun, Mingming,Ye, Mao,Hu, Feng,et al. Tenax extraction for exploring rate-limiting factors in methyl-beta-cyclodextrin enhanced anaerobic biodegradation of PAHs under denitrifying conditions in a red paddy soil[J]. JOURNAL OF HAZARDOUS MATERIALS,2014,264:505-513.
APA	Sun, Mingming.,Ye, Mao.,Hu, Feng.,Li, Huixin.,Teng, Ying.,...&Kengara, Fredrick Orori.(2014).Tenax extraction for exploring rate-limiting factors in methyl-beta-cyclodextrin enhanced anaerobic biodegradation of PAHs under denitrifying conditions in a red paddy soil.JOURNAL OF HAZARDOUS MATERIALS,264,505-513.
MLA	Sun, Mingming,et al."Tenax extraction for exploring rate-limiting factors in methyl-beta-cyclodextrin enhanced anaerobic biodegradation of PAHs under denitrifying conditions in a red paddy soil".JOURNAL OF HAZARDOUS MATERIALS 264(2014):505-513.