The concentrations, distribution and partitioning, ecological and health risk assessment of organochlorine pesticides (OCPs) in the urbanized river network of Shanghai were studied. The goal was to establish connections among OCP residues with their impacts on ecological and human health. Analytical results showed that the OCPs concentrations in the northern and southern regions of Shanghai were significantly higher than that in other regions, and OCP concentrations in suspended particulate matter (SPM) were higher than that in surface water. The Kp values of different OCP individuals varied widely, and that of ∑26 OCPs were negatively correlated with TSS contents (p < 0.01). The ecological risk was assessed according to the Risk Quotient (RQ) method, and some OCPs formed point-like areas with higher local ecological risks, which were concentrated in agricultural areas. The health risk assessment showed the rankings of incremental lifetime carcinogenic risk (ILCR) for dermal contact and mistaken oral intake according to age and gender. From the median, the ILCR for dermal contact in population groups were at low risk, except for male adults and female adults, whose ILCR were at moderate risk. The ILCR values caused by mistaken oral intake were all at very low risk. The non-carcinogenic risk hazard index (HI) values of both exposure routes were smaller than 1, indicating that OCPs in river waters didn't cause significant non-carcinogenic health hazards for most of people. 

Ecological and health risk assessment of organochlorine pesticides in an urbanized river network of Shanghai, China

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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