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Concentration and distribution of polychlorinated biphenyls in rice paddy soils

Author:
Kim, Leesun, Jeon, Jin-Woo, Son, Ji-Young, Park, Min-Kyu, Kim, Chul-Su, Jeon, Hwang-Ju, Nam, Tae-Hoon, Kim, Kyeongnam, Park, Byung-Jun, Choi, Sung-Deuk, Lee, Sung-Eun
Source:
Han'guk Ŭngyong Saengmyŏng Hwahakhoe chi = 2017 v.60 no.2 pp. 191-196
Subject:
aroclors, chemistry, cluster analysis, factories, mass spectrometry, paddies, paddy soils, risk, steel, toxicity, Korean Peninsula
Abstract:
To monitor and evaluate the risk of polychlorinated biphenyls (PCBs) contamination in Pohang, Korea, the concentration and distribution of 29 PCBs in paddy soils were determined using high-resolution gas chromatography/high-resolution mass spectrometry. The overall concentrations of Σ₂₉ PCBs in the paddy soils of the areas close to the heavily industrial city of Pohang (268–1833 pg g⁻¹ dw) were higher than those in the paddies from Anseong (106.6–222.6 pg g⁻¹ dw) in Korea. In Pohang, the major contributors to the Σ₂₉ PCBs were the non-dioxin-like PCBs, including the PCBs 28, 52, 70, 101, 118, 138, 153, and 180, which correspond to 48–62% of the total PCBs. The toxic equivalency (TEQ) values obtained from the 12 dioxin-like PCBs from Pohang (0.03–1.03 pg TEQ g⁻¹ dw) showed that PCB 126 contributed the highest toxicity, possibly posing a risk to the living organisms. The results of both principal component and cluster analysis based on the PCB homologue patterns demonstrated that each sampling site showed a similar PCBs contamination pattern, and Aroclor 1254, which is likely used by small and big steel factories, was identified as a major source of PCB contamination in Pohang.
Agid:
5724297