Biodegradation of Metal-EDTA Complexes by an Enriched Microbial Population
Biodegradation of Metal-EDTA Complexes by an Enriched Microbial Population
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富集微生物群对金属-EDTA 配合物的生物降解
DOI：
10.1128/aem.64.4.1319-1322.1998
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发表时间：
1998
影响因子：
4.4
通讯作者：
L. Macaskie
中科院分区：
文献类型：
--
作者：
Russell A. P. Thomas;K. Lawlor;M. Bailey;L. Macaskie
利用EDTA作为唯一碳源的混合培养从默西河（英国）的水和工业污水处理厂的污泥的混合接种物中分离出来。从培养物中分离出14种组成生物，包括甲基杆菌属、Variovorax属、肠杆菌属、金黄色细菌属和芽孢杆菌属的代表。混合培养缓慢降解金属- edta配合物；生物降解性依次为Fe>Cu>Co>Ni>Cd。通过将无机磷酸盐作为沉淀配体掺入培养基中，重金属在EDTA降解的同时被去除。混合培养还利用了一些可能的EDTA降解中间体作为碳源。
ABSTRACT A mixed culture utilizing EDTA as the sole carbon source was isolated from a mixed inoculum of water from the River Mersey (United Kingdom) and sludge from an industrial effluent treatment plant. Fourteen component organisms were isolated from the culture, including representatives of the genera Methylobacterium,Variovorax, Enterobacter,Aureobacterium, and Bacillus. The mixed culture biodegraded metal-EDTA complexes slowly; the biodegradability was in the order Fe>Cu>Co>Ni>Cd. By incorporation of inorganic phosphate into the medium as a precipitant ligand, heavy metals were removed in parallel to EDTA degradation. The mixed culture also utilized a number of possible EDTA degradation intermediates as carbon sources.