当存在雌激素污染风险的研究区缺乏数据或监测难度大时,为了判断地下环境中雌激素迁移能力,对地下水污染风险进行预警,需要先结合雌激素物质自身结构和在环境中的活性初步评估其在地下的淋溶迁移能力。本文在环境雌激素中选出直接影响生殖健康类雌激素物质81种,依据地下水污染指数(groundwater ubiquity score,GUS)法,对生殖健康类雌激素在地下环境中的迁移能力进行评价。结果表明,81种雌激素中,高淋溶迁移性的占69.14%,一般迁移性的占7.40%;其中包含于EPA优先控制有毒有机污染物名单中的雌二醇、雌三醇、雌酮、DDT和DDE的GUS值分别为3.58、7.73、3.19、-3.34和-2.68。5种雌激素中,雌三醇的GUS值最大,为7.73。本研究的81种雌激素中,GUS值高于雌三醇的有20种以上;所选生殖健康类雌激素在地下环境中的迁移主要受有机碳吸附系数(K_oc)的影响。

When data are scare or monitoring is difficult in the study areas which are under the risk of contamination by reproductive health estrogens, it is necessary to evaluate the leaching migration ability of the estrogens based on their structures and activities in the environment, in order to estimate the migration ability of environmental estrogens and the groundwater contamination risk. Eighty one reproductive health estrogens were selected for the evaluation of their migration abilities in the subsurface environment based on the Groundwater Ubiquity Score method (GUS). It is shown that 69.14% of these estrogens are highly leachable, and 7.40% of them are of moderate migration ability. The GUS values of the priority toxic organic pollutants on the EPA list, i.e. estradiol, estrone, estradiol three alcohol, DDT and DDE are 3.58, 7.73, 3.19, -3.34 and -2.68, respectively; among them, estradiol three alcohol has the highest GUS value. More than twenty estrogens tested have GUS values higher than the GUS value of estradiol three alcohol. The migration abilities of these reproductive health estrogens in the subsurface environment are mainly affected by the organic carbon adsorption coefficient.