Removing Selenite from Groundwater with an In Situ Biobarrier: Laboratory Studies
Removing Selenite from Groundwater with an In Situ Biobarrier: Laboratory Studies
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DOI：
10.1007/s00284-004-4418-0
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发表时间：
2005-03
影响因子：
2.6
通讯作者：
W. Hunter;L. Kuykendall
中科院分区：
文献类型：
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作者：
W. Hunter;L. Kuykendall
对实验室生物载体从流动地下水中去除亚硒酸盐的能力进行了评估。含水层中的微生物活性通常受到基质可用性的限制，生物载体通过提供基质来刺激微生物活性;在这些研究中使用大豆油。将含有10 mg L− 1亚硒酸盐-Se的水泵送通过生物载体74天，并监测流出物中存在的量。在研究的前两周，这些量仍然很高，但随后下降。从第28天到研究结束，色谱柱流出物中亚硒酸盐-Se的含量平均为0.20 ± 0.04 mg L−1，下降约98%。在研究结束时，施加到柱的亚硒酸盐-Se的约一半被回收为由生物屏障捕获的固定化硒。这项研究表明，含有植物油的生物载体可能被用作从受污染的地下水中去除亚硒酸盐的过程。
Laboratory biobarriers were evaluated for their ability to remove selenite from flowing groundwater. Microbial activity in aquifers is usually limited by substrate availability, and biobarriers stimulate microbial activity by providing a substrate; for these studies soybean oil was used. Water containing 10 mg L−1selenite-Se was pumped through the biobarriers for 74 days and the amount present in the effluent monitored. The amounts remained high for the first 2 weeks of the study but then declined. From day 28 until the end of the study the amount of selenite-Se in the column effluents averaged 0.20 ± 0.04 mg L−1, a decrease of approximately 98%. At the end of the study about half of the selenite-Se applied to the columns was recovered as immobilized selenium trapped by the biobarrier. This study suggests that biobarriers containing vegetable oil might be used as a process for removing selenite from contaminated groundwater.