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Effect of simulated sunlight on atrazine and metolachlor toxicity of surface waters.
Ecotoxicol Environ Saf. 1999 May; 43(1):35-7.EE

Abstract

Atrazine and metolachlor are the two most widely used herbicides in the United States; through non-point-source runoff both herbicides may cause toxicity to aquatic organisms. Toxicity changes were measured for atrazine and metolachlor in surface waters after exposure to simulated sunlight (0, 20, and 40 kJ/m2) using a Xenon Weather-Ometer. A Microtox toxicity test, using the marine luminescent bacterium Vibrio fischeri, was conducted on deionized, river, and bay water samples mixed with atrazine or metolachlor herbicide (12 mg/liter) after exposure to simulated sunlight. Microtox test (EC50%) results demonstrated that the toxicity decreased with increasing light intensity for both herbicides in river and bay water. These results also indicate that the toxicity of the bay water, with high concentrations of organic and suspended matter, was reduced, for both herbicides, compared with the toxicity of the river water, possibly through photodegradation of pesticides.

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Authors+Show Affiliations

Lin YJ
Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, USA.
Karuppiah M
No affiliation info available
Shaw A
No affiliation info available
Gupta G
No affiliation info available

MeSH

AcetamidesAtrazineFresh WaterHerbicidesPhotochemistrySunlightToxicity TestsWater Pollutants, Chemical

Pub Type(s)

Journal Article

Language

eng

PubMed ID

10330318

Citation

Lin, Y J., et al. "Effect of Simulated Sunlight On Atrazine and Metolachlor Toxicity of Surface Waters." Ecotoxicology and Environmental Safety, vol. 43, no. 1, 1999, pp. 35-7.
Lin YJ, Karuppiah M, Shaw A, et al. Effect of simulated sunlight on atrazine and metolachlor toxicity of surface waters. Ecotoxicol Environ Saf. 1999;43(1):35-7.
Lin, Y. J., Karuppiah, M., Shaw, A., & Gupta, G. (1999). Effect of simulated sunlight on atrazine and metolachlor toxicity of surface waters. Ecotoxicology and Environmental Safety, 43(1), 35-7.
Lin YJ, et al. Effect of Simulated Sunlight On Atrazine and Metolachlor Toxicity of Surface Waters. Ecotoxicol Environ Saf. 1999;43(1):35-7. PubMed PMID: 10330318.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of simulated sunlight on atrazine and metolachlor toxicity of surface waters. AU - Lin,Y J, AU - Karuppiah,M, AU - Shaw,A, AU - Gupta,G, PY - 1999/5/20/pubmed PY - 1999/5/20/medline PY - 1999/5/20/entrez SP - 35 EP - 7 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 43 IS - 1 N2 - Atrazine and metolachlor are the two most widely used herbicides in the United States; through non-point-source runoff both herbicides may cause toxicity to aquatic organisms. Toxicity changes were measured for atrazine and metolachlor in surface waters after exposure to simulated sunlight (0, 20, and 40 kJ/m2) using a Xenon Weather-Ometer. A Microtox toxicity test, using the marine luminescent bacterium Vibrio fischeri, was conducted on deionized, river, and bay water samples mixed with atrazine or metolachlor herbicide (12 mg/liter) after exposure to simulated sunlight. Microtox test (EC50%) results demonstrated that the toxicity decreased with increasing light intensity for both herbicides in river and bay water. These results also indicate that the toxicity of the bay water, with high concentrations of organic and suspended matter, was reduced, for both herbicides, compared with the toxicity of the river water, possibly through photodegradation of pesticides. SN - 0147-6513 UR - https://www.unboundmedicine.com/medline/citation/10330318/Effect_of_simulated_sunlight_on_atrazine_and_metolachlor_toxicity_of_surface_waters_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(98)91751-1 DB - PRIME DP - Unbound Medicine ER -