Anaerobic biotransformation of organoarsenical pesticides monomethylarsonic acid and dimethylarsinic acid
Journal of Agricultural and Food Chemistry
By: R. Sierra-Alvarez, U. Yenal, J.A. Feld, M. Kopplin, A.J. Gandolfi, and J.R. Garbarino
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Abstract
Monomethylarsonic acid (MMAV) and dimethylarsinic acid (DMAV) are extensively utilized as pesticides, introducing large quantities of arsenic into the environment. Once released into the environment, these organoarsenicals are subject to microbial reactions. Aerobic biodegradation of MMAV and DMAV has been evaluated, but little is known about their fate in anaerobic environments. The objective of this study was to evaluate the biotransformation of MMAV and DMAV in anaerobic sludge. Biologically mediated conversion occurred under methanogenic or sulfate-reducing conditions but not in the presence of nitrate. Monomethylarsonous acid (MMAIII) was consistently observed as an important metabolite of MMAV degradation, and it was recovered in molar yields ranging from 5 to 47%. The main biotransformation product identified from DMAV metabolism was MMAV, which was recovered in molar yields ranging from 8 to 65%. The metabolites indicate that reduction and demethylation are important steps in the anaerobic bioconversion of MMAV and DMAV, respectively. ?? 2006 American Chemical Society.
Suggested Citation
Sierra-Alvarez, R., Yenal, U., Feld, J., Kopplin, M., Gandolfi, A., and Garbarino, J., 2006, Anaerobic biotransformation of organoarsenical pesticides monomethylarsonic acid and dimethylarsinic acid: Journal of Agricultural and Food Chemistry, v. 54, no. 11, p. 3959-3966, https://doi.org/10.1021/jf053223n.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Anaerobic biotransformation of organoarsenical pesticides monomethylarsonic acid and dimethylarsinic acid |
| Series title | Journal of Agricultural and Food Chemistry |
| DOI | 10.1021/jf053223n |
| Volume | 54 |
| Issue | 11 |
| Publication Date | May 04, 2006 |
| Year Published | 2006 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Agricultural and Food Chemistry |
| First page | 3959 |
| Last page | 3966 |