Angewandte Geologie, Universität Göttingen, Goldschmidtstrasse 3, D-37077 Göttingen, Germany.
J Hazard Mater. 2010 Mar 15;175(1-3):1075-80. doi: 10.1016/j.jhazmat.2009.09.152. Epub 2009 Oct 6.
The interpretation of processes yielding aqueous contaminant removal in the presence of elemental iron (e.g. in Fe(0)/H(2)O systems) is subject to numerous complications. Reductive transformations by Fe(0) and its primary corrosion products (Fe(II) and H/H(2)) as well as adsorption onto and co-precipitation with secondary and tertiary iron corrosion products (iron hydroxides, oxyhydroxides, and mixed valence Fe(II)/Fe(III) green rusts) are considered the main removal mechanisms on a case-to-case basis. Recent progress involving adsorption and co-precipitation as fundamental contaminant removal mechanisms have faced a certain scepticism. This work shows that results from electrocoagulation (EC), using iron as sacrificial electrode, support the adsorption/co-precipitation concept. It is reiterated that despite a century of commercial use of EC, the scientific understanding of the complex chemical and physical processes involved is still incomplete.
在元素铁（例如 Fe(0)/H(2)O 系统）存在的情况下，对产生水污染物去除的过程的解释存在许多复杂情况。Fe(0) 及其主要腐蚀产物（Fe(II) 和 H/H(2)) 的还原转化，以及与次生和次生铁腐蚀产物（铁氢氧化物、氧氢氧化物和混合价态 Fe(II)/Fe(III) 绿锈）的吸附和共沉淀被认为是一种情况下的主要去除机制。最近涉及吸附和共沉淀作为基本污染物去除机制的进展受到了一定的怀疑。这项工作表明，使用铁作为牺牲电极的电凝（EC）的结果支持吸附/共沉淀概念。需要重申的是，尽管 EC 已经商业化使用了一个世纪，但对所涉及的复杂化学和物理过程的科学理解仍然不完整。
