Effect of Sediment on the Fate of Metolachlor and Atrazine in Surface Water

dc.contributor.author Rice, Pamela
dc.contributor.author Anderson, Todd
dc.contributor.author Coats, Joel
dc.contributor.author Coats, Joel
dc.contributor.department Entomology
dc.date 2018-02-17T06:33:30.000
dc.date.accessioned 2020-06-30T02:23:17Z
dc.date.available 2020-06-30T02:23:17Z
dc.date.issued 2004-05-01
dc.description.abstract <p>In aquatic environments, pesticides can partition between the dissolved phase and particulate phase depending on the type of suspended sediment present and the physical and chemical properties of the pesticides and water. Particulate matter and sediment can alter the bioavailability of contaminants to organisms and therefore influence their toxicity and availability for microbial degradation. Experiments were conducted to determine the degradation of atrazine (6-chloro-<em>N</em>-ethyl-<em>N</em>′-(1-methylethyl)-1,3,5-triazine-2,4-diamine) and metolachlor (2-chloro-<em>N</em>-(2-ethyl-6-methylphenyl)-<em>N</em>-(methooxyprop-2-yl)acetamide) in surface water, and to evaluate the contribution of sediment to their dissipation. Sediment significantly reduced concentrations of atrazine and metolachlor in the surface water as a result of greater degradation, evident by increased quantities of degradates in the surface water, and the partitioning of the herbicide or herbicide degradates in the sediment. First-order 50% dissipation time (DT50) values for atrazine and metolachlor were 42 and 8 d in the surface water-sediment incubation systems, which were almost four times less than the DT50s calculated for the sediment-free systems. The results of this research illustrate the importance of sediment in the fate of pesticides in surface water. Greater comprehension of the role of sediment to sequester or influence degradation of agrichemicals in aquatic systems will provide a better understanding of the bioavailability and potential toxicity of these contaminants to aquatic organisms.</p>
dc.description.comments <p>This article is from <em>Environmental Toxicology and Chemistry </em>23 (2004): 1145, doi:<a href="http://dx.doi.org/10.1897/03-110" target="_blank">10.1897/03-110</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ent_pubs/315/
dc.identifier.articleid 1319
dc.identifier.contextkey 7872931
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ent_pubs/315
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/23927
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ent_pubs/315/2004_Coats_EffectSediment.pdf|||Fri Jan 14 23:32:13 UTC 2022
dc.subject.disciplines Entomology
dc.subject.disciplines Environmental Monitoring
dc.subject.keywords Herbicides
dc.subject.keywords Dissipation
dc.subject.keywords Degradation
dc.subject.keywords Metabolites
dc.title Effect of Sediment on the Fate of Metolachlor and Atrazine in Surface Water
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 8bcdfc38-7da7-4e3c-8039-e495b01cc710
relation.isOrgUnitOfPublication f47c8cad-50be-4fb0-8870-902ff536748c
Original bundle
Now showing 1 - 1 of 1
99.66 KB
Adobe Portable Document Format