期刊
WATER
卷 15, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/w15010200
关键词
clogging; column tests; granular mixtures; heavy metals; hydraulic conductivity; iron corrosion; mathematical models; PRB design
This paper provides an overview of the long-term hydraulic behavior of PRBs composed of ZVI mixed with other reactive or inert materials. It analyzes the factors influencing their performance and suggests a procedure for their correct hydraulic design. It also highlights the need for developing numerical models to couple PRBs' hydraulic and reactive behaviors.
Permeable reactive barriers (PRBs) based on the use of zero valent iron (ZVI) represent an efficient technology for the remediation of contaminated groundwater, but the literature evidences failures, often linked to the difficulty of fully understanding the long-term performance of ZVI-based PRBs in terms of their hydraulic behavior. The aim of this paper is to provide an overview of the long-term hydraulic behavior of PRBs composed of ZVI mixed with other reactive or inert materials. The literature on the hydraulic performance of ZVI-based PRBs in full-scale applications, on long-term laboratory testing and on related mathematical modeling was thoroughly analyzed. The outcomes of this review include an in-depth analysis of factors influencing the long-term behavior of ZVI-based PRBs (i.e., reactive medium, contamination and the geotechnical, geochemical and hydrogeological characteristics of the aquifer) and a critical revision of the laboratory procedures aimed at investigating their hydraulic performance. The analysis clearly shows that admixing ZVI with nonexpansive granular materials is the most suitable choice for obtaining a long-term hydraulically efficient PRB. Finally, the paper summarizes a procedure for the correct hydraulic design of ZVI-based PRBs and outlines that research should aim at developing numerical models able to couple PRBs' hydraulic and reactive behaviors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据