Evolution of nanoscale zero-valent iron (nZVI) in water: Microscopic and spectroscopic evidence on the formation of nano- and micro-structured iron oxides

Journal of Hazardous Materials
Airong LiuWei-Xian Zhang

Abstract

Knowledge on the transformation of nanoscale zero-valent iron (nZVI) in water is essential to predict its surface chemistry including surface charge, colloidal stability and aggregation, reduction and sorption of organic contaminants, heavy metal ions and other pollutants in the environment. In this work, transmission electronic microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy are applied to study the compositional and structural evolution of nZVI under oxic and anoxic conditions. Under anoxic conditions, the core-shell structure of nZVI is well maintained even after 72h, and the corrosion products usually contain a mixture of wustite (FeO), goethite (α-FeOOH) and akaganeite (β-FeOOH). Under oxic conditions, the core-shell structure quickly collapses to flakes or acicular-shaped structures with crystalline lepidocrocite (γ-FeOOH) as the primary end product. This work provides detailed information and fills an important knowledge gap on the physicochemical characteristics and structural evolution of engineered nanomaterials in the environment.

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Citations

Oct 28, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Haoran DongGuangming Zeng
Jun 1, 2020·Environmental Science and Pollution Research International·Mai Lien TranRuey-Shin Juang
Feb 13, 2019·Environmental Science and Pollution Research International·Fei LiuBingcai Pan
Aug 31, 2017·Environmental Science and Pollution Research International·Fenglin TangOlaf Kolditz
Nov 12, 2018·Environmental Science and Pollution Research International·Yihao YaoWeixian Zhang
Jan 30, 2021·Journal of Hazardous Materials·Yanlong WangDaohui Lin
May 19, 2021·Environmental Science and Pollution Research International·Bing WangYubo Sun
Jun 2, 2021·Environmental Science & Technology·Adrian D MetzgenMarkus Ebert
Jun 5, 2021·Journal of Environmental Management·Ye WangRen-Cun Jin
Oct 3, 2018·Environmental Science & Technology·Sungjun BaeKhalil Hanna
Jun 29, 2018·Environmental Science & Technology·Feng HeBeidou Xi
Aug 7, 2018·Environmental Science & Technology·Amarendra Dhar DwivediYoon-Seok Chang
Aug 21, 2021·The Science of the Total Environment·Lionel MarconVíctor F Puntes
May 1, 2018·Environmental Science & Technology·Yanyan ZhangSubhasis Ghoshal
Sep 16, 2021·Environmental Science & Technology·Jinxiang LiWei-Xian Zhang
Nov 3, 2021·Environmental Science and Pollution Research International·Estefanía M MartinisNicolás Arancibia-Miranda
Oct 7, 2018·Journal of Environmental Sciences (China)·Liming RenHuazheng Huang

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