In Situ Remediation of Groundwater Contaminated by Heavy- and Transition-Metal Ions by Selective Ion-Exchange Methods
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- 作者：Mark Y. Vilensky ; Brian Berkowitz ; and Abraham Warshawsky
- 刊名：Environmental Science & Technology
- 出版年：2002
- 出版时间：April 15, 2002
- 年：2002
- 卷：36
- 期：8
- 页码：1851 - 1855
- 全文大小：104K
- 年卷期：v.36,no.8(April 15, 2002)
- ISSN：1520-5851
文摘
Laboratory studies were conducted to investigate thefeasibility of using ion-exchange resins in permeable reactivebarriers (PRBs) for the remediation of groundwatercontaminated by heavy and transition metals. Ion-exchangeresins represent an essentially neglected class of materialswhich may, in addition to iron, activated carbon, andzeolites, prove effective for use in PRBs. Four resins wereconsidered: two commercially available resins, Duolite GT-73 (Rohm and Haas) and Amberlite IRC-748 (Rohm and Haas),and two solvent-impregnated resins (SIRs). The SIRswere prepared from Amberlite IRA-96 (Rohm and Haas)and two different thiophosphoric extractants. All four resinsare able to reduce cadmium, lead, and copper concentrationsfrom 1000 
g/L (typical for contaminated groundwaters)to below 5 g/L. Significantly, all of the resins are effectivefor the capture of cadmium, copper, and lead, even inthe presence of CaCl2 and clay. Because of their highhydraulic conductivity, the use of these resins in clustersof wells, as an alternative to continuous walls, isconsidered in the design of effective PRBs. Numericalsolution of the groundwater flow equations shows that,depending on the well configuration, most (or all) of thecontaminated groundwater can pass through the resins.These results demonstrate the possibility of using selectiveion-exchange resins as an effective, active material inPRBs for in situ groundwater remediation.
g/L (typical for contaminated groundwaters)to below 5 g/L. Significantly, all of the resins are effectivefor the capture of cadmium, copper, and lead, even inthe presence of CaCl2 and clay. Because of their highhydraulic conductivity, the use of these resins in clustersof wells, as an alternative to continuous walls, isconsidered in the design of effective PRBs. Numericalsolution of the groundwater flow equations shows that,depending on the well configuration, most (or all) of thecontaminated groundwater can pass through the resins.These results demonstrate the possibility of using selectiveion-exchange resins as an effective, active material inPRBs for in situ groundwater remediation.