Immobilization of mercury by pyrite (FeS2)

被引：134

作者：

Bower, Julia ^{[1
]}

Savage, Kaye S. ^{[2
]}

Weinman, Beth ^{[2
]}

Barnett, Mark O. ^{[1
]}

Hamilton, William P. ^{[3
]}

Harper, Willie F. ^{[1
]}

机构：

[1] Auburn Univ, Dept Civil Engn, Auburn, AL 36849 USA

[2] Vanderbilt Univ, Dept Earth & Environm Sci, Nashville, TN 37235 USA

[3] Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37235 USA

来源：

ENVIRONMENTAL POLLUTION | 2008年 / 156卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Mercury; Pyrite; Remediation; Sulfide;

D O I：

10.1016/j.envpol.2008.01.011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Elemental mercury (Hg-0) is a metal with a number of atypical properties, which has resulted in its use in myriad anthropogenic. However, these same properties have also led to sever local subsurface contamination at many places where it has been used. As such, we studied the influence of various parameters on Hg(II) sorption onto (pH, time, Hg(II) concentration), a potential subsurface reactive barrier. Batch sorption studies revealed that total Hg(II) removal increase with both pH and time. X-ray absorption spectroscopy analysis showed that a transformation in the coordination environment at low pH occurred during aging over 2 weeks, to form an ordered monolayer of monodentate Hg-Cl complex on pyrite. In column studies packed with pure quartz sand, the transport of Hg(II) was significantly retarded by the presence of a thin pyrite-sand reactive barrier, although dissolved oxygen inhibited Hg(II) sorption onto pyrite in the column. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：504 / 514

页数：11