使用金属螯合吸附剂降低萘生物降解中的金属毒性
Metal toxicity reduction in naphthalene biodegradation by use of metal-chelating adsorbents.
作者信息
Malakul P, Srinivasan KR, Wang HY
机构信息
Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA.
出版信息
Appl Environ Microbiol. 1998 Nov;64(11):4610-3. doi: 10.1128/AEM.64.11.4610-4613.1998.
Abstract
A model system comprising microbial degradation of naphthalene in the presence of cadmium has been developed to evaluate metal toxicity associated with polyaromatic hydrocarbon biodegradation and its reduction by the use of unmodified and surfactant-modified clays in comparison with a commercially available chelating resin (Chelex 100; Bio-Rad). The toxicity of cadmium associated with naphthalene biodegradation was shown to be reduced significantly by using the modified-clay complex and Chelex resin, while unmodified clay has no significant impact on this reduction. The degree of metal toxicity reduction can be quantitatively related to the metal adsorption characteristics of these adsorbents, such as adsorption capacity and selectivity.
摘要
已开发出一种模型系统，该系统包含在镉存在的情况下微生物对萘的降解，以评估与多环芳烃生物降解相关的金属毒性，以及与市售螯合树脂（Chelex 100；伯乐公司）相比，使用未改性和表面活性剂改性的粘土对其进行的还原作用。结果表明，使用改性粘土复合物和Chelex树脂可显著降低与萘生物降解相关的镉的毒性，而未改性粘土对这种还原作用没有显著影响。金属毒性降低的程度可与这些吸附剂的金属吸附特性（如吸附容量和选择性）定量相关。
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