Understanding Fate and Effects of Copper Pesticides in Aquatic SystemsReport as inadecuate




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Coppersulfate and other chelated or complex copper forms are commonly used to managenuisance and noxious algae and invasive weeds through direct application toaquatic systems. Regulatory scrutiny and perceived non-target species impactssupported the need for an accurate risk assessment of fate and effects ofcopper applied as a pesticide. Copper inputs to aquatic systems originate fromnumerous sources e.g. natural, storm water, industrial whereas directpesticide applications account for approximately 13%. Following a pesticideapplication, copper rapidly partitions to suspended algae and particulates andthe majority >90% of applied copper is transferred to sediments within 2days. Copper subsequently shifts to less bioavailable forms and risks tonon-target species are significantly decreased. Additionally, the copper thatpartitions to sediments is diluted through migration to greater sedimentsdepths and accretion. Even when elevated sediment copper concentrations weremeasured following chronic applications or high treatment levels, no adverseeffects to non-target species were observed with laboratory or fieldexperiments. When used appropriately copper can be an effective tool for waterresource managers with negligible environmental impact.

KEYWORDS

Sediments, Risks, Bioavailability, Algaecide, Herbicide, Copper

Cite this paper

Willis, B. and Bishop, W. 2016 Understanding Fate and Effects of Copper Pesticides in Aquatic Systems. Journal of Geoscience and Environment Protection, 4, 37-42. doi: 10.4236-gep.2016.45004.





Author: Ben E. Willis*, West M. Bishop

Source: http://www.scirp.org/



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