Coupling electrokinetics with microbial biodegradation enhances the removal of cycloparaffinic hydrocarbons in soils

doi:10.1016/j.jhazmat.2016.07.043

	Coupling electrokinetics with microbial biodegradation enhances the removal of cycloparaffinic hydrocarbons in soils
	Yuan, Ye 1,2; Guo, Shuhai 1; Li, Fengmei 1; Wu, Bo 1; Yang, Xuelian 3; Li, Xuan 4
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2016-12-15
卷号	320 页码:591-601
关键词	Electrokinetics Cyclododecane Ring-breaking Beta-oxidation
ISSN号	0304-3894
DOI	10.1016/j.jhazmat.2016.07.043
英文摘要	An innovative approach that couples electrokinetics with microbial degradation to breakdown cycloparaffinic hydrocarbons in soils is described. Soils were spiked with cyclododecane, used as a model pollutant, at approximately 1000 mg kg(-1). A mixture of petroleum-utilizing bacteria was added to achieve about 10(6)-10(7) CFU g(-1). Then, three treatments were applied for 25 days: (1) no electric field, control; (2) a constant voltage gradient of 1.3 V cm(-1) in one direction; and (3) the same electric field, but with periodical switching of polarity. The degradation pathway of cyclododecane was not changed by the electric field, but the dynamic processes were remarkably enhanced, especially when the electric field was periodically switched. After 25 days, 79.9% and 87.0% of the cyclododecane was degraded in tests 2 and 3, respectively; both much higher than the 61.5% degraded in test 1. Analysis of the intermediate products strongly indicated that the competitive advantage of the electric field was the increase in ring-breaking of cyclododecane, resulting in greater concentrations of linear substances that were more susceptible to microbial attack, that is, beta-oxidation. The conditions near the cathode were more favorable for the growth and metabolism of microorganisms, which also enhanced beta-oxidation of the linear alkanoic acids. Therefore, when the electric field polarity was periodically switched, the functions of both the anode and cathode electrodes were applied across the whole soil cell, further increasing the degradation efficiency. (C) 2016 Elsevier B.V. All rights reserved.
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000385600700064
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122812]
专题	中国科学院沈阳应用生态研究所
通讯作者	Guo, Shuhai
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Shenyang, Peoples R China 2.Shenyang Res Inst Chem Ind, Safety Evaluat Ctr, Shenyang, Peoples R China 3.Shenyang Univ, Coll Life Sci & Bioengn, Shenyang, Peoples R China 4.Shenyang Res Inst Chem Ind, Pesticide Testing Lab, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Ye,Guo, Shuhai,Li, Fengmei,et al. Coupling electrokinetics with microbial biodegradation enhances the removal of cycloparaffinic hydrocarbons in soils[J]. JOURNAL OF HAZARDOUS MATERIALS,2016,320:591-601.
APA	Yuan, Ye,Guo, Shuhai,Li, Fengmei,Wu, Bo,Yang, Xuelian,&Li, Xuan.(2016).Coupling electrokinetics with microbial biodegradation enhances the removal of cycloparaffinic hydrocarbons in soils.JOURNAL OF HAZARDOUS MATERIALS,320,591-601.
MLA	Yuan, Ye,et al."Coupling electrokinetics with microbial biodegradation enhances the removal of cycloparaffinic hydrocarbons in soils".JOURNAL OF HAZARDOUS MATERIALS 320(2016):591-601.