期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 389, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.122092
关键词
Migration; 17 alpha-Estradiol; 17 beta-Estradiol; Transformation products; 17 beta-Estradiol equivalency estimation
资金
- National Natural Science Foundation of China [51608079]
- National Engineering Technology Research Center for Inland Waterway Regulation and Key Laboratory of Hydraulic & Waterway Engineering of the Ministry of Education Open Fund [SLK2018A04]
- Graduate Education Innovation Funding of School of River and Ocean Engineering, Chongqing Jiaotong University [YC2019004, YC2019008]
The environmental behaviors of steroid estrogens (SEs) associated with land irrigation and application are of critical concern worldwide. Understanding the spatio-temporal distribution and transformation process of these estrogenic compounds in soil is greatly significant. In this study, laboratory soil column experiments were conducted to investigate and explore the migration and abiotic transformation of 17 alpha-estradiol (17 alpha-E2) and 17 beta-estradiol (17 beta-E2) over spatial and time scales. Results indicated that the migration tendency of 17 alpha-E2 and 17 beta-E2 was similar. Discrepancies in transport for different SEs groups might be due to the competitive sorption and isomeric transformation in the binary-solute system. 17 alpha-E2 and 17 beta-E2 can also undergo the abiotic transformation during soil column transport. The soil with naturally abundant mineral substances (e.g., iron and manganese oxides) indicated that E2 isomers tended to mineral-promoted racemization, oxidation, reduction, and radical coupling reactions. Some possible transformation products (e.g., SE239, E-2378, and SE dimer(476)) were identified and proposed in soil samples. Compared to the single compound tests, the estimated 17 beta-estradiol equivalency (EEQ) values of E2 mixture were higher during SEs migration process.
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