土壤2017，Vol.49Issue(1)：118-128,11.DOI:10.13758/j.cnki.tr.2017.01.018
天然磁铁矿和商用Fe3O4修复Hg(II)污染地下水的模拟研究
Simulating Remediation of Hg(II)-Contaminated Groundwater Using Natural Magnetite and Commercial Fe3O4
摘要
Abstract
Currently, remediation of Hg(II)-contaminated groundwater is technically challenging and very costly. It is urgently needed to develop effective and cost-effective technology and material to remediate Hg(II)-contaminated groundwater. The efficiency and mechanism of Hg(II) removal from groundwater by two types of iron–based sorbents, natural magnetite and commercial Fe3O4, were investigated in this study. Hg(II) sorption and desorption on magnetites were also investigated in simulated groundwater. The results showed that both natural magnetite and commercial Fe3O4 removed Hg(II) effectively, and Hg(II) removal efficiency was influenced by initial pH, initial Hg(II) concentration, coexisting ion of Cl–, and so on. Sorption kinetic data were well fitted to the pseudo-second-order model. The sorption isotherm could be described by the Freundlich model. The sorption of Hg(II) on natural magnetite was mainly due to the complexation between Hg(II) and surface hydroxyl groups and physisorption, while the sorption of Hg(II) on commercial Fe3O4 was largely due to the reduction of Hg(II) by Fe(II) in Fe3O4 and physisorption. Hg(II) removal from simulated groundwater by natural magnetite and commercial Fe3O4 were nearly 90% and 95%, respectively, demonstrating the application potential of both sorbents in remediating Hg(II)-contaminated groundwater.关键词
天然磁铁矿/商用Fe3O4/修复/Hg(II)/地下水污染Key words
Natural magnetite/Commercial Fe3O4/Remediation/Hg(II)/Groundwater contamination分类
资源环境引用本文复制引用
林娜,宋昕,郭亮,殷鹏华,胡志豪..天然磁铁矿和商用Fe3O4修复Hg(II)污染地下水的模拟研究[J].土壤,2017,49(1):118-128,11.基金项目
中国科学院重点部署项目(KZZD-EW-TZ-13)资助. （KZZD-EW-TZ-13）
