Faculty of Natural Sciences, Hung Vuong University, Nguyen Tat Thanh Street, Viet Tri, 35120, Phu Tho, Viet Nam.
School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing, 211100, China.
Chemosphere. 2021 Oct;280:130614. doi: 10.1016/j.chemosphere.2021.130614. Epub 2021 Apr 27.
The global effort to mitigate the impact of environmental pollution has led to the use of various types of metallic iron (Fe(0)) in the remediation of soil and groundwater as well as in the treatment of industrial and municipal effluents. During the past three decades, hundreds of scientific publications have controversially discussed the mechanism of contaminant removal in Fe(0)/HO systems, with the large majority considering Fe(0) to be oxidized by contaminants of concern. This view assumes that contaminant reduction is the cathodic reaction occurring simultaneously with Fe oxidative dissolution (anodic reaction). This view contradicts the century-old theory of the electrochemical nature of aqueous iron corrosion and hinders progress in designing efficient and sustainable remediation Fe(0)/HO systems. The aim of the present communication is to demonstrate the fallacy of the current prevailing view based on articles published before 1910. It is shown that properly reviewing the literature would have avoided the mistake. Going back to the roots is recommended as the way forward and should be considered first while designing laboratory experiments.
全球努力减轻环境污染的影响导致了各种类型的金属铁（Fe(0)）在土壤和地下水修复以及工业和城市废水处理中的应用。在过去的三十年中，数百篇科学出版物对 Fe(0)/HO 体系中污染物去除的机制进行了有争议的讨论，其中绝大多数认为 Fe(0)是被关注的污染物氧化的。这种观点假设污染物的还原是与 Fe 氧化溶解（阳极反应）同时发生的阴极反应。这种观点与水相铁腐蚀的电化学性质的百年理论相矛盾，并阻碍了设计高效和可持续修复 Fe(0)/HO 系统的进展。本通讯的目的是基于 1910 年以前发表的文章，证明当前流行观点的谬误。结果表明，正确地回顾文献本来可以避免错误。回到根本是前进的方向，在设计实验室实验时应首先考虑。
