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Chemistry of arsenic removal during coagulation and Fe–Mn oxidation
Abstract
Recent studies have indicated that arsenic in drinking water is as hazardous as radon in homes and secondhand tobacco smoke. Arsenic removal during coagulation or Fe–Mn oxidation is examined to aid utilities that desire to improve arsenic removal. Fundamental mechanisms of arsenic removal are discussed, optimization strategies are forwarded, and some new insights are provided to guide future research. Specifically, As(III) removals by coagulation are primarily controlled by coagulant dose and relatively unaffected by solution pH, whereas the converse is true for As(V). When compared on the basis of moles iron or aluminum hydroxide solid formed during coagulation, iron and aluminum coagulants are of demonstrably equal effectiveness in removing As(V) at pH <7.5. However, iron‐based coagulants are advantageous if soluble metal residuals are problematic, if pH is >7.5, or if the raw water contains As(III). Arsenic removal during Fe–Mn oxidation is controlled by the quantity of iron removed [Fe(OH)3 formed] and is relatively independent of the quantity of manganese removed (MnOOH formed).
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Cites
(1999) · Choice Reviews Online · doi:10.5860/choice.37-0940 · Cited by 14,314
Effect of redox potential and pH on arsenic speciation and solubility in a contaminated soil
Masscheleyn, P. H., Delaune, R. D., & Patrick, W. H. (1991) · Environmental Science & Technology · doi:10.1021/es00020a008 · Cited by 1,073
Cited by
A review of the source, behaviour and distribution of arsenic in natural waters
Smedley, P. L., & Kinniburgh, D. G. (2002) · Applied Geochemistry · doi:10.1016/s0883-2927(02)00018-5 · Cited by 7,691
Arsenic removal from water/wastewater using adsorbents—A critical review
Mohan, D., & Pittman, C. U. (2007) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2007.01.006 · Cited by 3,536
Physico–chemical treatment techniques for wastewater laden with heavy metals
Kurniawan, T. A., Chan, G. Y. S., Lo, W.-H., & Babel, S. (2006) · Chemical Engineering Journal · doi:10.1016/j.cej.2006.01.015 · Cited by 2,072
Arsenic — a Review. Part I: Occurrence, Toxicity, Speciation, Mobility
Bissen, M., & Frimmel, F. H. (2003) · Acta hydrochimica et hydrobiologica · doi:10.1002/aheh.200390025 · Cited by 916
Wilkie, J. A., & Hering, J. G. (1996) · Colloids and Surfaces A: Physicochemical and Engineering Aspects · doi:10.1016/0927-7757(95)03368-8 · Cited by 666
Metadata
- Authors
- Edwards, M.
- Venue
- Journal AWWA
- Publisher
- Wiley
- Published
- 1994-09
- Volume
- 86
- Issue
- 9
- Pages
- 64-78
- ISSN
- 0003-150X (ISSN-L)
- 1551-8833
- OpenAlex
- W1520748060
- Cited by
- 351
- References
- 2
- FWCI
- 5.37
- Type
- journal article
- Language
- en
- Open access
- closed
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- Edwards, M. (1994). Chemistry of arsenic removal during coagulation and Fe–Mn oxidation. Journal AWWA. https://doi.org/10.1002/j.1551-8833.1994.tb06247.x
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
