Levels and Risk Assessment of Polychlorinated Biphenyls (PCBS) in Soils from Informal E-Waste Recycling Sites in Cameroun

Romaric E. Ouabo 1 * , Abimbola Y. Sangodoyin 2, Mary B. Ogundiran 3, Babafemi A. Babalola 3

European Journal of Sustainable Development Research, Volume 2, Issue 4, Article No: 44.

https://doi.org/10.20897/ejosdr/3912

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Abstract

This study assessed the levels and human health risk of polychlorinated biphenyls (PCBs) in soils of e-waste recycling sites in Douala, Cameroun. Surface soil samples from these sites were collected and analyzed by Gas Chromatography- Electron Capture Detector to quantify the levels of 30 PCBs (including 10 dioxin-like PCBs). The investigated 30 PCBs were detected in all the soil samples. The mean and standard deviation of the total PCBs in Makea, Ngodi and New Bell recycling sites were 32.1±4.48, 31.9±0.10 and 72.8±13.5 ng/g, respectively. Between 26-46% of the Ʃ30 PCB concentrations were comprised of the dioxin-like PCB congeners. The toxic equivalent (TEQ) values of 10 dioxin-like PCBs were lower than the Canadian soil quality guidelines of dioxin (4 pg TEQ g−1). Human health risk through ingestion, dermal contact, and inhalation was lower than the values of cancer risk (10−6) indicating low adverse effects of PCBs in the recycling sites.

Keywords

polychlorinated biphenyls, health risk, e-waste, Douala

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Citation

Ouabo RE, Sangodoyin AY, Ogundiran MB, Babalola BA. Levels and Risk Assessment of Polychlorinated Biphenyls (PCBS) in Soils from Informal E-Waste Recycling Sites in Cameroun. European Journal of Sustainable Development Research. 2018;2(4):44. https://doi.org/10.20897/ejosdr/3912

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