Sanches Sandra, Rodrigues Alexandre, Cardoso Vitor V, Benoliel Maria J, Crespo João G, Pereira Vanessa J
iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2780-901, Oeiras, Portugal.
Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157, Oeiras, Portugal.
Environ Sci Pollut Res Int. 2016 Jun;23(11):11279-11288. doi: 10.1007/s11356-016-6325-x. Epub 2016 Feb 29.
A sequential water treatment combining low pressure ultraviolet direct photolysis with nanofiltration was evaluated to remove hormones from water, reduce endocrine disrupting activity, and overcome the drawbacks associated with the individual processes (production of a nanofiltration-concentrated retentate and formation of toxic by-products). 17β-Estradiol, 17α-ethinylestradiol, estrone, estriol, and progesterone were spiked into a real water sample collected after the sedimentation process of a drinking water treatment plant. Even though the nanofiltration process alone showed similar results to the combined treatment in terms of the water quality produced, the combined treatment offered advantage in terms of the load of the retentate and decrease in the endocrine-disrupting activity of the samples. Moreover, the photolysis by-products produced, with higher endocrine disrupting activity than the parent compounds, were effectively retained by the membrane. The combination of direct LP/UV photolysis with nanofiltration is promising for a drinking water utility that needs to cope with sudden punctual discharges or deterioration of the water quality and wants to decrease the levels of chemicals in the nanofiltration retentate.
评估了一种将低压紫外直接光解与纳滤相结合的顺序水处理方法，以去除水中的激素，降低内分泌干扰活性，并克服与单个过程相关的缺点（产生纳滤浓缩截留物和形成有毒副产物）。将17β-雌二醇、17α-乙炔雌二醇、雌酮、雌三醇和孕酮添加到饮用水处理厂沉淀过程后采集的实际水样中。尽管单独的纳滤过程在产生的水质方面显示出与联合处理相似的结果，但联合处理在截留物负荷和样品内分泌干扰活性降低方面具有优势。此外，产生的光解副产物具有比母体化合物更高的内分泌干扰活性，被膜有效地截留。对于需要应对突发点源排放或水质恶化并希望降低纳滤截留物中化学物质水平的饮用水公用事业来说，直接低压/紫外光解与纳滤相结合是很有前景的。
