Microbial aldicarb transformation in aquifer, lake, and salt marsh sediments.

Applied and Environmental Microbiology
J Kazumi, D G Capone

Abstract

The microbial transformation of [N-methyl-(sup14)C]aldicarb, a carbamate pesticide, occurred in aquifer, lake, and salt marsh sediments. Microbial degradation of aldicarb took place within 21 days in aquifer sediments from sites previously exposed to aldicarb (Jamesport, Long Island, N.Y.) but did not occur in sediments which were not previously exposed (Connetquot State Park, Long Island, N.Y.). At the Jamesport sites, higher aldicarb transformation rates occurred in deep, anoxic sediments than in shallow, oxic sediments. There was a significant negative relationship (P < 0.05) between transformation rates and ambient dissolved O(inf2) levels. Aldicarb hydrolysis rates in Jamesport sediments were 10- to 1,000-fold lower than rates previously reported for soils. In addition, aldicarb degradation rates were not significantly correlated with measurements of bacterial activity and density previously determined in the same sediments. Substantially higher aldicarb degradation rates were found in anoxic lake and salt marsh than in aquifer sediments. Furthermore, we investigated the anaerobic microbial processes involved in aldicarb transformation by adding organic substrates (acetate, glucose), an alternative electron acceptor (nitra...Continue Reading

References

Jan 1, 1991·Applied and Environmental Microbiology·C M Aelion, P M Bradley
Nov 1, 1987·Archives of Environmental Contamination and Toxicology·R L Jones, T E Marquardt
Jan 1, 1983·Applied and Environmental Microbiology·D R Lovley, M J Klug
Jan 1, 1983·Applied and Environmental Microbiology·M R Winfrey, D M Ward
Jun 1, 1986·Applied and Environmental Microbiology·R P Kiene, D G Capone

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Citations

Jul 27, 2021·Frontiers in Microbiology·Harshit MalhotraPrashant S Phale

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