Main content area

AhR-mediated potency of sediments and soils in estuarine and coastal areas of the Yellow Sea region: A comparison between Korea and China

Hong, Seongjin, Khim, Jong Seong, Naile, Jonathan E., Park, Jinsoon, Kwon, Bong-Oh, Wang, Tieyu, Lu, Yonglong, Shim, Won Joon, Jones, Paul D., Giesy, John P.
Environmental pollution 2012 v.171 pp. 216-225
bioassays, coasts, gene expression, sediments, soil, tetrachlorodibenzo-p-dioxin, transcriptional activation, China, Korean Peninsula, Yellow Sea
Extracts of sediments (n = 45) and soils (n = 37) collected from the coast of the Yellow Sea, in Korea and China, were screened for their ability to induce dioxin-like gene expression in vitro using the H4IIE-luc, transactivation bioassay. Significant dioxin-like potency was observed except for a few soils from Korea. Concentrations of TCDD-EQ (2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents) in sediments were comparable between Korea and China, but concentrations of TCDD-EQ in soil were 2-fold greater from Korea. Mass balance analysis indicated that concentrations of TCDD-EQ were to some degree chemical- and/or matrix-dependent, but were much more site-specific. For example, the proportion of the TCDD-EQ that could be identified varied among locations, which suggests different sources. Unidentified AhR-active compounds represented a greater proportion of the TCDD-EQ in samples from Korea, which suggests that sources in Korea were more complex than those in China. Potential sources of TCDD-EQ were investigated by considering land-uses and local activities.