Pilot scale studies on the remediation of chromium contaminated aquifer using bio-barrier and reactive zone technologies
Pilot scale studies on the remediation of chromium contaminated aquifer using bio-barrier and reactive zone technologies
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DOI：
10.1016/j.cej.2010.12.024
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发表时间：
2011-02
影响因子：
15.1
通讯作者：
J. Jeyasingh;V. Somasundaram;L. Philip;S. M. Bhallamudi
中科院分区：
文献类型：
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作者：
J. Jeyasingh;V. Somasundaram;L. Philip;S. M. Bhallamudi
进行了中试规模研究，以评估利用生物屏障和反应区技术以及铬还原细菌对 Cr(VI) 污染的含水层进行生物修复的适用性。实验结果表明，当达西速度为0.0196cm/h时，初始生物量浓度为0.44mg/g土壤的10cm厚生物屏障能够完全容纳浓度为50mg/L的Cr(VI)羽流。在反应区技术的情况下，当羽流中的 Cr(VI) 浓度高达 250mg/L、每个注入井注入 150g（湿重）细菌时，具有四个注入井的系统仍然有效。提出了一个数学模型来模拟生物修复过程。尽管该模型可以预测实验中观察到的总体趋势，但它受到均匀条件假设的限制。
Pilot scale studies were carried out to evaluate the suitability of bioremediation of Cr(VI) contaminated aquifers using bio-barrier and reactive zone technologies, employing chromium reducing bacteria. Experimental results showed that a 10cm thick bio-barrier with an initial biomass concentration of 0.44mg/g of soil was able to completely contain a Cr(VI) plume of 50mg/L concentration, when the Darcy velocity was 0.0196cm/h. In the case of reactive zone technology, a system with four injection wells was effective even when Cr(VI) concentration in the plume was as high as 250mg/L, when 150g (wet weight) of bacteria were injected into each injection well. A mathematical model was proposed for simulating the bioremediation process. Though the model could predict the over all trends observed in the experiments, it is limited by the assumption of homogeneous conditions.