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Iwegbue, Chukwujindu M.A.; Ossai, Chinedu J.; Ogwu, Ijeoma F.; Olisah, Chijioke; Ujam, Oguejiofo T.; Nwajei, Godwin E.; Martincigh, Bice S.
The Science of the total environment, 08/2024, Letnik: 938Journal Article
The concentrations, sources, and risk of twenty organochlorine pesticides (OCPs) in soils and dusts from a typical urban setting in the Niger Delta of Nigeria were examined. The Σ20 OCP concentrations (ng g−1) varied from 4.49 to 150 with an average value of 32.6 for soil, 4.67 to 21.5 with an average of 11.7 for indoor dust, and 1.6 to 96.7 with an average value of 23.5 for outdoor dust. The Σ20 OCP concentrations in these media were in the order: soil > outdoor dust > indoor dust, which was in contrast with the order of the detection frequency, i.e., indoor dust (95 to 100 %) > soil (60 to 90 %) > outdoor dust (30 to 80 %). The concentrations of the different OCP classes in these media followed the order: aldrin + dieldrin + endrin and its isomers (Drins) > chlordanes > dichlorodiphenyltrichloroethane (DDTs) > hexachlorocyclohexane (HCHs) > endosulfans for outdoor dust and soil, while that of the indoor dust followed the order: Drins > chlordanes > endosulfans > DDTs > HCHs. The cancer risk values for human exposure to OCPs in these sites exceeded 10−6 which indicates possible carcinogenic risks. The sources of OCPs in these media reflected both past use and recent inputs. Display omitted •OCPs in dust and soils from Port Harcourt city were investigated.•OCP concentrations in soils were higher than those of outdoor and indoor dusts.•Drins and chlordanes were the dominant OCPs in these media.•Exposure to OCPs in these media pose a risk to humans.•OCPs in these media originated from predominantly aged used sources.
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