Removal of soluble selenium by a selenate‐reducing bacterium Bacillus sp. SF‐1
Removal of soluble selenium by a selenate‐reducing bacterium Bacillus sp. SF‐1
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DOI：
10.1002/biof.5520140132
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发表时间：
2001
期刊：
影响因子：
6
通讯作者：
Masami Kashiwa;M. Ike;H. Mihara;N. Esaki;M. Fujita
中科院分区：
文献类型：
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作者：
Masami Kashiwa;M. Ike;H. Mihara;N. Esaki;M. Fujita
为了开发一种从工业废水中去除硒的生物方法，芽孢杆菌属。菌株 SF-1 是从硒污染的沉积物中分离出来的。该细菌在厌氧条件下使用乳酸盐作为电子供体和硒酸盐作为电子受体，将硒酸盐还原为亚硒酸盐，随后还原为无毒的不溶性元素硒。由可溶性硒转化而来的元素硒沉积在细胞内外。由于菌株SF-1的硒酸盐还原率高于亚硒酸盐还原率，因此亚硒酸盐暂时积累。在菌株 SF-1 反复降低可溶性硒的实验中，可连续处理 0.5 mM 的硒酸盐，周期为 1 天。因此，我们用于去除可溶性硒的顺序系统非常有用。
In order to develop a biological process for removal of selenium from industrial wastewater, Bacillus sp. strain SF‐1 was isolated from selenium‐contaminated sediment. The bacterium reduces selenate to selenite and subsequently to nontoxic insoluble elemental selenium using lactate as an electron donor and selenate as an electron acceptor in an anaerobic condition. Elemental selenium transformed from soluble selenium was deposited both inside and outside of the cells. Since the selenate reduction rate of the strain SF‐1 was higher than the selenite reduction rate, selenite was transiently accumulated. In an experiment of the repeated soluble selenium reduction by strain SF‐1, 0.5 mM of selenate was sequentially treatable with a cycle of one day. Thus, our sequential system for removal of soluble selenium is very useful.