Zhu Liang, Gao Kaituo, Jin Jie, Lin Haizhuan, Xu Xiangyang
Department of Environmental Engineering, Zhejiang University, 310058, Hangzhou, China,
Environ Sci Pollut Res Int. 2014 Nov;21(22):12747-56. doi: 10.1007/s11356-014-3215-y. Epub 2014 Jun 27.
The zero-valent iron (ZVI) corrosion products and their functions were investigated in the combined ZVI and anaerobic sludge system. Results showed that ZVI corrosion occurred, and the reductive transformation and dechlorination of p-chloronitrobenzene (p-ClNB) by the anaerobic sludge were enhanced. In the combined systems with different types of ZVIs and mass ratios of anaerobic sludge to ZVI, a considerable amount of suspended iron compounds was produced and coated onto the microbial cells. However, the microbial cellular structure was damaged, and the p-ClNB reductive transformation was affected adversely after the long-term presence of nanoscale ZVI (NZVI) or reduced ZVI (RZVI) with a high concentration of 5 g L(-1). The oxidized products of FeOOH and Fe3O4 were found on the surface of ZVI, which are speculated to act as electron mediators and consequently facilitate the utilization of electron donors by the anaerobic microbes.
在零价铁（ZVI）与厌氧污泥的联合系统中，对ZVI腐蚀产物及其功能进行了研究。结果表明，ZVI发生了腐蚀，厌氧污泥对p - 氯硝基苯（p-ClNB）的还原转化和脱氯作用得到增强。在不同类型ZVI以及厌氧污泥与ZVI不同质量比的联合系统中，产生了大量悬浮铁化合物并附着在微生物细胞上。然而，在长期存在高浓度5 g L(-1)的纳米级ZVI（NZVI）或还原态ZVI（RZVI）后，微生物细胞结构受到破坏，p-ClNB的还原转化也受到不利影响。在ZVI表面发现了FeOOH和Fe3O4的氧化产物，推测它们作为电子介质，从而促进厌氧微生物对电子供体的利用。
