Institute for the Control of Agrochemicals, Ministry of Agriculture and Rural Affairs, Beijing, 100125, People's Republic of China.
State Key Laboratory for Quality and Safety of Agro-Products, Key Laboratory for Pesticide Residue Detection of Ministry of Agriculture and Rural Affairs, Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, NO. 298 Desheng Road, Hangzhou, 310021, People's Republic of China.
Sci Rep. 2020 Aug 6;10(1):13273. doi: 10.1038/s41598-020-70300-x.
Quinestrol (QUN), a synthetic estrogen used as an oral contraceptive or emergency contraceptive component, has been shown to be an endocrine-disrupting chemical. To assess the environmental risk of QUN, batch equilibration experiments were conducted to investigate the adsorption-desorption of QUN in five contrasting soils from different areas of China. The leaching properties were also calculated based on the adsorption and degradation data from our previous study with the same soils. The Freundlich and Langmuir models were applied to the sorption-desorption data to examine the affinity towards QUN of the soils, which had varying physical and chemical properties. The K and K values of QUN in the tested soils ranged from 3.72 to 20.47 mg L kg and from 1.26 to 7.8 mg L kg, respectively, and Q ranged from 28.25 to 126.58 mg/kg. The desorption data showed that hysteresis occurred. The K and K values of QUN were positively correlated with the soil total organic carbon (OC) and cation exchange capacity (CEC), and it may be due to the content of TOC and CEC exhibited a positive correlation. A low mobility potential of QUN in soils was predicted and verified the adsorption results by the groundwater ubiquity score (GUS) and retardation factor (R).
己烯雌酚（QUN）是一种合成雌激素，用作口服避孕药或紧急避孕药的成分，已被证明是一种内分泌干扰化学物质。为了评估 QUN 的环境风险，进行了批量平衡实验，以研究 QUN 在来自中国不同地区的五种不同土壤中的吸附-解吸。还根据我们之前用相同土壤进行的吸附和降解数据计算了浸出特性。应用 Freundlich 和 Langmuir 模型来检查土壤对 QUN 的吸附-解吸数据的亲和力，这些土壤具有不同的物理和化学性质。在测试土壤中，QUN 的 K 和 K 值范围分别为 3.72 至 20.47 mg L kg 和 1.26 至 7.8 mg L kg，Q 值范围为 28.25 至 126.58 mg/kg。解吸数据表明出现了滞后。QUN 的 K 和 K 值与土壤总有机碳（OC）和阳离子交换容量（CEC）呈正相关，这可能是由于 TOC 和 CEC 的含量呈正相关。预测了 QUN 在土壤中低迁移潜力，并通过地下水普遍存在评分（GUS）和滞留因子（R）验证了吸附结果。
