Coupled hydro-geochemical modelling of a permeable reactive barrier for treating acidic groundwater

被引：30
|
作者：
Indraratna, Buddhima [1 ]
Pathirage, Punyama Udeshini [2 ]
Rowe, R. Kerry [3 ]
Banasiak, Laura [2 ]
机构：
[1] Univ Wollongong, ARC Ctr Excellence Geotech Sci & Engn, Ctr Geomech & Railway Engn, Program Leader, Wollongong, NSW 2522, Australia
[2] Univ Wollongong, Ctr Geomech & Railway Engn, Wollongong, NSW 2522, Australia
[3] Queens Univ, Dept Civil Engn, Kingston, ON K7L 3N6, Canada
来源：
COMPUTERS AND GEOTECHNICS | 2014年 / 55卷
基金：
澳大利亚研究理事会;
关键词：
Acidic groundwater; Chemical clogging; Permeable reactive barrier; Mineral precipitation; Transport modelling; ZERO-VALENT IRON; LONG-TERM PERFORMANCE; MINERAL PRECIPITATION; TRANSPORT; REMEDIATION;
D O I：
10.1016/j.compgeo.2013.09.025
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
This study focuses on coupling geochemistry with geo-hydraulics to enable time-dependent modelling of the remediation of acidic groundwater using an alkaline permeable reactive barrier (PRB). Chemical clogging due to secondary mineral precipitates reduces the porosity and hydraulic conductivity of the reactive medium. The governing equations are incorporated into commercial numerical codes, MODFLOW and RT3D. An original algorithm was developed for RT3D to simulate geochemical reactions occurring in the PRB. The results and the model predictions are in agreement, confirming that the hydraulic conductivity reduction due to mineral precipitation occurs at the start of permeation and continues until halfway through the testing phase. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：429 / 439
页数：11
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