As(III) removal from groundwaters using fixed-bed upflow bioreactors
As(III) removal from groundwaters using fixed-bed upflow bioreactors
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DOI：
10.1016/s0045-6535(01)00306-x
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发表时间：
2002-04-01
期刊：
影响因子：
8.8
通讯作者：
Bartel, H
中科院分区：
文献类型：
--
作者：
Katsoyiannis, I;Zouboulis, A;Bartel, H
铁锰生物氧化法是一种很有潜力的地下水除砷处理方法。这种方法是基于某些种类的土著细菌的生长，这些细菌能够氧化可溶性铁和锰离子;通过将其转化为不溶性氧化物并通过合适的过滤介质分离，随后可以将氧化形式从水流中去除97%以上。在某些条件下，砷的去除率约为80%，发现这些条件足以去除Fe（II）（溶解氧2.7 mg/l，氧化还原280-290 mV，pH 7.2，U 8.25 m/h）。这种特殊的处理技术相对于常规的物理化学处理方法（例如强化混凝或直接吸附）具有几个优点，因为：（a）它不需要添加其它化学品来氧化和除去As（III），（B）它不需要象在常规柱吸附方法中那样密切监测穿透点，和（c）它可以应用于除去，至少，三种地下水污染物（Fe，Mn. As）。(C)2002爱思唯尔科技有限公司版权所有。
The application of biological oxidation of iron and manganese, as a potential treatment method for the removal of arsenic from contaminated groundwaters, was examined in this paper. This method was based on the growth of certain species of indigenous bacteria, which are capable of oxidizing the soluble iron and manganese ions; the oxidized forms can be subsequently removed from the aqueous stream by over 97%, through their transformation to insoluble oxides and separation by a suitable filter medium. Arsenic was removed by around 80% under certain conditions, which were found to be sufficient for Fe(II) removal (dissolved oxygen 2.7 mg/l, redox 280-290 mV, pH 7.2, U 8.25 m/h). The specific treatment technique presents several advantages towards conventional physicochemical treatment methods, such as enhanced coagulation or direct adsorption since: (a) it does not require the addition of other chemicals for oxidizing and removing As(III), (b) it does not require close monitoring of a breakthrough point, as in conventional column adsorption processes and (c) it could find application for the removal of, at least, three groundwater contaminants (Fe, Mn. As). (C) 2002 Elsevier Science Ltd. All rights reserved.