Impacts of heavy metals on 1,2-dichloroethane biodegradation in co-contaminated soil

查看全文 作　　者：Ademola O. [1]Olaniran;Adhika [1]Balgobind;Balakrishna [1]Pillay

机构地区：[1]Discipline of Microbiology, School of Biochemistry, Genetics, Microbiology and Plant Pathology, Faculty of Science and Agriculture, University of KwaZulu-Natal (Westville Campus), Private Bag X54001, Durban 4000, Republic of South Africa

出　　处：《Journal of Environmental Sciences》索引2009年第21卷第5期,共6页

基　　金：supported by the Competitive Research Grant of the University of KwaZulu-Natal, Durban;the National Research Foundation of South Africa. 摘　　要：1,2-Dichloroethane (DCA), a potential mutagen and carcinogen, is commonly introduced into the environment through its industrial and agricultural use. In this study, the impact of lead and mercury on DCA degradation in soil was investigated, owing to the complex co-contamination problem frequently encountered in most sites. 1,2-Dichloroethane was degraded readily in both contaminated loam and clay soils with the degradation rate constants ranging between 0.370-0.536 week1 and 0.309-0.417 week1, respectively. The presence of heavy metals have a negative impact on DCA degradation in both soil types, resulting in up to 24.11% reduction in DCA degradation within one week. Both biostimulation and treatment additives increased DCA degradation, with the best degradation observed upon addition of glucose and a combination of diphosphate salt and sodium chloride, leading to about 17.91% and 43.50% increase in DCA degradation, respectively. The results have promising potential for effective remediation of soils co-contaminated with chlorinated organics and heavy metals. However, the best bioremediation strategy will depend on the soil types, microbial population present in the soil matrices, nutrients availability and metal forms. 关键词：退化土壤二氯乙烷污染问题重金属降解 DCA排序土壤类型有机物污染

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Impacts of heavy metals on 1,2-dichloroethane biodegradation in co-contaminated soil

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