Journal
ENVIRONMENTAL MONITORING AND ASSESSMENT
Volume 188, Issue 11, Pages -Publisher
SPRINGER
DOI: 10.1007/s10661-016-5612-9
Keywords
Organophosphorus pesticides; Hazard index; Risk assessment; River water
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Organophosphorus pesticides (OPs), which are some of the most extensively used pesticides, have drawn much attention in recent years owing to their ubiquity as well as the potential ecological and health risks they pose to aquatic organisms and even to humans. In this study, we investigated the residue of five OPs in 49 river cross sections in Shangyu, Zhejiang province, China, a rainy region with relatively developed agriculture. Correlations analysis, principal component analysis, and cluster analysis were conducted. The results showed that dichlorvos exhibited the highest concentrations (0.01 to 5.63 mu g/L) among the OPs in most monitoring sites. Weak positive correlations were found between methyl parathion and dichlorvos as well as malathion and dimethoate. The principal component analysis and cluster analysis indicated a correlation among these river cross sections. We then calculated the hazard index (HI) to estimate the potential adverse health effects. The mean HI presented no risk to adults but showed potential health risks to children, with values of 0.285, 0.228, and 0.166 for dichlorvos, methyl parathion, and dimethoate, respectively. Our study will help elucidate the potential risks of OPs and their residues in the rivers of Shangyu in the Zhejiang province in China and will be beneficial for managing water quality and will provide valuable suggestions to local policy makers.
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