Importance of fine particles in pesticide runoff from concrete surfaces and its prediction

Environmental Science & Technology
Weiying Jiang, Jay Gan

Abstract

Pesticides such as pyrethroids have been frequently found in runoff water from urban areas and the offsite movement is a significant cause for aquatic toxicities in urban streams and estuaries. To better understand the origination of pesticide residues in urban runoff, we investigated the association of pyrethroid residues with loose particles in runoff water from concrete surfaces after treatment with commercial products of bifenthrin and permethrin. In runoff water generated from simulated precipitations after 1 to 89 d exposure under dry outdoor conditions, over 80% of the pesticides was found on particles >0.7 μm for most treatments. The solid-water partitioning coefficient (K(d)) on day 1 was estimated to be 2.4 × 10(3) to 1.1 × 10(5) L/kg for permethrin and bifenthrin on these solids. Except for solid formulations, the pesticide-laden particles likely originated from dust particles preexisting on the concrete before treatment and the disintegration of the surficial concrete matter through weathering. We consequently tested a simple sponge-wipe method to collect and analyze the loose particles on concrete. Concurrent analyses (n = 30) showed an excellent linear correlation between the amount of pesticides transferrable to ...Continue Reading

References

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Apr 20, 2011·Bulletin of Environmental Contamination and Toxicology·Yanhong LiRobert Krieger

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Citations

Oct 9, 2015·Pest Management Science·Weiying JiangJay Gan
Mar 14, 2016·The Science of the Total Environment·Weiying Jiang, Jay Gan
Apr 12, 2013·Pest Management Science·Weiying JiangJay Gan
May 14, 2016·Environmental Science & Technology·Weiying JiangJay Gan
Aug 9, 2017·Environmental Toxicology and Chemistry·Elin M UlrichWenjian Lao
Jul 13, 2018·International Journal of Environmental Research and Public Health·Angela GorgoglioneThomas M Young

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