Journal article
Effects of Natural Organic Matter, Anthropogenic Surfactants, and Model Quinones on the Reduction of Contaminants by Zero-Valent Iron
Water research (Oxford), Vol.35(18), pp.4435-4443
2001
DOI: 10.1016/S0043-1354(01)00165-8
PMID: 11763046
Abstract
Recent studies of contaminant reduction by zero-valent iron metal (Fe
0) have highlighted the role of iron oxides at the metal–water interface and the effect that sorption has at the oxide–water interface on contaminant reduction kinetics. The results suggest that a variety of organic surface-active substances might enhance or inhibit contaminant degradation, depending on the degree to which they promote solubilization, sorption, and/or reaction. Of particular interest is the effect of natural organic matter (NOM), because of its ubiquitous presence in natural waters and amphiphilic properties; anthropogenic surfactants, because of their use in groundwater remediation; and certain quinones, which represent the redox-active functional groups associated with NOM. In this study, no well-defined effects of these substances were found on the reduction of nitro benzene by Fe
0, but the reduction of carbon tetrachloride and trichloroethylene (TCE) was inhibited by NOM. Results with carbon tetrachloride showed that the inhibitory effect of humic acids was greater than fulvic acids, but that several quinonoid NOM model compounds (juglone, lawsone, and anthraquinone disulfonate) increased the rate of reduction by Fe
0. Isotherms for adsorption of TCE and NOM onto Fe
0 showed evidence of competition for surface sites.
Details
- Title: Subtitle
- Effects of Natural Organic Matter, Anthropogenic Surfactants, and Model Quinones on the Reduction of Contaminants by Zero-Valent Iron
- Creators
- Paul G Tratnyek - Department of Environmental Science and Engineering Oregon Graduate Institute of Science and Technology 20000 NW Walker Road, Portland, OR 97006, USAMichelle M Scherer - Department of Environmental Science and Engineering Oregon Graduate Institute of Science and Technology 20000 NW Walker Road, Portland, OR 97006, USABaolin Deng - Department of Environmental Engineering, New Mexico Institute of Mining and Technology Socorro, NM 87801, USAShaodong Hu - Department of Environmental Engineering, New Mexico Institute of Mining and Technology Socorro, NM 87801, USA
- Resource Type
- Journal article
- Publication Details
- Water research (Oxford), Vol.35(18), pp.4435-4443
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/S0043-1354(01)00165-8
- PMID
- 11763046
- ISSN
- 0043-1354
- eISSN
- 1879-2448
- Language
- English
- Date published
- 2001
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9983991956402771
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