Environmental risk assessment of the emerging EDCs contaminants from rural soil and aqueous sources: Analytical and modelling approaches

The emerging endocrine disrupting chemicals posed high risk and much uncertainty to eco-environment and human health. An analytical method, developed for the simultaneous determination of five steroid oestrogens in groundwater and soil based upon solid phase extraction and gas chromatography-mass spectrometry, was applied to investigate the distribution of oestrone and 17?-oestradiol around Shenyang City with particular focus on penetrating from surface to groundwater in this study. Mean concentrations of the estrone and 17?-oestradiol were 55.1?ng?L-1 and 56.1?ng?L-1 in groundwater, 32.5?ng?g-1 and 23.1?ng?g-1 in soil, respectively. The distribution of oestrone and 17?-oestradiol were similar in groundwater, the concentration in the west of the site centre was relatively low, and the surroundings were relatively high. The concentration of estrone was changed less, but 17?-oestradiol was significantly increased in silt and silty sand layers in vadose zone profiles. Both estrone and 17?-oestradiol concentrations changed abruptly at the interface of layers. Incorporating the temporal and spatial evolution of physical-chemical-biological environmental parameters at the sites, sorption and biodegradation were suggested the controlling roles in the fate and transport of SEs in the soil-groundwater system. The Ecological risk quotients values of both soil and groundwater indicated a very high ecological risk associated with SEs, but the non-carcinogenic harm quotients did not exceed the acceptable level of non-carcinogenic human health risk.

Authors: Song X, Wen Y, Wang Y, Adeel M, Yang Y. ; Full Source: Chemosphere. 2018 May; 198:546-555. doi: 10.1016/j.chemosphere.2018.01.060. Epub 2018 Jan 19.

Posted in Uncategorized