Dias Amanda Cristina Vieira, Gomes Frederico Wegenast, Bila Daniele Maia, Sant'Anna Geraldo Lippel, Dezotti Marcia
Chemical Engineering Program - COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, 21941-972 Rio de Janeiro, RJ, Brazil.
Department of Environmental and Sanitary Engineering, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Ecotoxicol Environ Saf. 2015 Oct;120:41-7. doi: 10.1016/j.ecoenv.2015.05.013. Epub 2015 May 27.
The estrogenicity of waters collected from an important hydrological system in Brazil (Paraiba do Sul and Guandu Rivers) was assessed using the yeast estrogen screen (YES) assay. Sampling was performed in rivers and at the outlets of conventional water treatment plants (WTP). The removal of estrogenic activity by ozonation and chlorination after conventional water treatment (clarification and sand filtration) was investigated employing samples of the Guandu River spiked with estrogens and bisphenol A (BPA). The results revealed a preoccupying incidence of estrogenic activity at levels higher than 1ngL(-1) along some points of the rivers. Another matter of concern was the number of samples from WTPs presenting estrogenicity surpassing 1ngL(-1). The oxidation techniques (ozonation and chlorination) were effective for the removal of estrogenic activity and the combination of both techniques led to good results using less amounts of oxidants.
采用酵母雌激素筛选（YES）分析法，对巴西一个重要水文系统（帕拉伊巴河和关杜河）采集的水样的雌激素活性进行了评估。在河流和常规水处理厂（WTP）的出水口进行了采样。使用添加了雌激素和双酚A（BPA）的关杜河样品，研究了常规水处理（澄清和砂滤）后通过臭氧化和氯化去除雌激素活性的情况。结果显示，在河流的某些点位，雌激素活性水平高于1ngL(-1)的情况令人担忧。另一个令人担忧的问题是，来自水处理厂的水样中雌激素活性超过1ngL(-1)的数量。氧化技术（臭氧化和氯化）对去除雌激素活性有效，两种技术结合使用较少的氧化剂就能取得良好效果。
