Climate Change Data Portal
DOI | 10.1111/gwmr.12111 |
Review of Abiotic Degradation of Chlorinated Solvents by Reactive Iron Minerals in Aquifers | |
He, Y. T.1; Wilson, J. T.2; Su, C.3; Wilkin, R. T.3 | |
发表日期 | 2015-06-01 |
ISSN | 1069-3629 |
卷号 | 35期号:3页码:57-75 |
英文摘要 | Abiotic degradation of chlorinated solvents by reactive iron minerals such as iron sulfides, magnetite, green rust, and other Fe(II)-containing minerals has been observed in both laboratory and field studies. These reactive iron minerals form under iron- and sulfate-reducing conditions which are commonly found in permeable reactive barriers (PRBs), enhanced reductive dechlorination (ERD) treatment locations, landfills, and aquifers that are chemically reducing. The objective of this review is to synthesize current understanding of abiotic degradation of chlorinated solvents by reactive iron minerals, with special focus on how abiotic processes relate to groundwater remediation. Degradation of chlorinated solvents by reactive minerals can proceed through reductive elimination, hydrogenolysis, dehydrohalogenation, and hydrolysis reactions. Degradation products of abiotic reactions depend on degradation pathways and parent compounds. Some degradation products (e.g., acetylene) have the potential to serve as a signature product for demonstrating abiotic reactions. Laboratory and field studies show that various minerals have a range of reactivity toward chlorinated solvents. A general trend of mineral reactivity for degradation of chlorinated solvents can be approximated as follows: disordered FeS > FeS > Fe(0) > FeS2 > sorbed Fe2+>green rust=magnetite>biotite=vermiculite. Reaction kinetics are also influenced by factors such as pH, natural organic matter (NOM), coexisting metal ions, and sulfide concentration in the system. In practice, abiotic reactions can be engineered to stimulate reactive mineral formation for groundwater remediation. Under appropriate site geochemical conditions, abiotic reactions can occur naturally, and can be incorporated into remedial strategies such as monitored natural attenuation. |
语种 | 英语 |
WOS记录号 | WOS:000360841900005 |
来源期刊 | GROUND WATER MONITORING AND REMEDIATION |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/58298 |
作者单位 | 1.W Virginia Univ, West Virginia Water Res Inst, Morgantown, WV 26506 USA; 2.Environm Solut LLC, Ada, OK 74820 USA; 3.US EPA, Ground Water & Ecosyst Restorat Div, Natl Risk Management Res Lab, Off Res & Dev, Ada, OK 74820 USA |
推荐引用方式 GB/T 7714 | He, Y. T.,Wilson, J. T.,Su, C.,et al. Review of Abiotic Degradation of Chlorinated Solvents by Reactive Iron Minerals in Aquifers[J]. 美国环保署,2015,35(3):57-75. |
APA | He, Y. T.,Wilson, J. T.,Su, C.,&Wilkin, R. T..(2015).Review of Abiotic Degradation of Chlorinated Solvents by Reactive Iron Minerals in Aquifers.GROUND WATER MONITORING AND REMEDIATION,35(3),57-75. |
MLA | He, Y. T.,et al."Review of Abiotic Degradation of Chlorinated Solvents by Reactive Iron Minerals in Aquifers".GROUND WATER MONITORING AND REMEDIATION 35.3(2015):57-75. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。