硒的生物矿化及其在生物技术中的应用。
Selenium biomineralization for biotechnological applications.
机构信息
Environmental Engineering and Water Technology Department, UNESCO-IHE Institute for Water Education, PO Box 3015, Delft DA 2601, The Netherlands; Biofouling and Biofilm Processes Section of Water and Steam Chemistry Division, Bhabha Atomic Research Centre, Kalpakkam, 603102, Tamil Nadu, India.
Environmental Engineering and Water Technology Department, UNESCO-IHE Institute for Water Education, PO Box 3015, Delft DA 2601, The Netherlands; Department of Chemistry and Bioengineering, Tampere University of Technology, PO Box 541, Tampere, Finland.
出版信息
Trends Biotechnol. 2015 Jun;33(6):323-30. doi: 10.1016/j.tibtech.2015.03.004. Epub 2015 Apr 21.
Selenium (Se) is not only a strategic element in high-tech electronics and an essential trace element in living organisms, but also a potential toxin with low threshold concentrations. Environmental biotechnological applications using bacterial biomineralization have the potential not only to remove selenium from contaminated waters, but also to sequester it in a reusable form. Selenium biomineralization has been observed in phylogenetically diverse microorganisms isolated from pristine and contaminated environments, yet it is one of the most poorly understood biogeochemical processes. Microbial respiration of selenium is unique because the microbial cells are presented with both soluble (SeO(4)(2-) and SeO(3)(2-)) and insoluble (Se(0)) forms of selenium as terminal electron acceptor. Here, we highlight selenium biomineralization and the potential biotechnological uses for it in bioremediation and wastewater treatment.
硒（Se）不仅是高科技电子产品中的战略元素，也是生物体中的必需微量元素，但同时也是一种具有低阈值浓度的潜在毒素。利用细菌生物矿化进行环境生物技术应用，不仅有可能从受污染的水中去除硒，而且还可以将其以可重复使用的形式固定下来。从原始和受污染的环境中分离出的具有不同系统发育的微生物中都观察到了硒的生物矿化，但这是最不为人知的生物地球化学过程之一。微生物对硒的呼吸作用是独特的，因为微生物细胞被提供了可溶性（SeO4(2-)和 SeO3(2-)）和不溶性（Se(0)）两种形式的硒作为末端电子受体。在这里，我们重点介绍硒的生物矿化以及它在生物修复和废水处理中的潜在生物技术用途。
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