title: Advanced oxidative processes and membrane separation for micropollutant removal from biotreated domestic wastewater.
abstract: The presence of micropollutants in sewage is already widely known, as well as the effects caused by natural and synthetic hormones. Thus, it is necessary to apply treatments to remove them from water systems, such as advanced oxidation processes (AOPs) and membrane separation processes, which can oxidize and remove high concentrations of organic compounds. This work investigated the removal of 17β-estradiol (E2), 17α-ethinylestradiol (EE2), and estriol (E3) from biotreated sewage. Reverse osmosis processes were conducted at three recoveries (50, 60, and 70 %). For E2 and EE2, the removals were affected by the recovery. The best results for RO were as follows: the E2 compound removal was 89 % for 60 % recovery and the EE2 compound removal was 57 % for 50 % recovery. The RO recovery did not impact the E3 removal. It was concluded that the interaction between the evaluated estrogens, and the membrane was the major factor for the hormone separation. The AOP treatment using H2O2/UV was carried out in two sampling campaigns. First, we evaluated the variation of UV doses (24.48, 73.44, 122.4, and 244.8 kJ m-2) with 18.8 mg L-1of H2O2in the reaction. EE2 showed considerable removals (around 70 %). In order to optimize the results, an experimental design was applied. The best result was obtained with higher UV dose (122.4 kJ m-2) and lower H2O2concentration (4 mg L-1), achieving removal of 91 % for E3 and 100 % for E2 and EE2.
authors: Escola de Química, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 149, Rio de Janeiro, Brazil. larissaloureiross@hotmail.com.
authors: Larissa L S
authors: LLS
authors: Silva
authors: Escola de Química, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 149, Rio de Janeiro, Brazil.
authors: Julio C S
authors: JCS
authors: Sales
authors: Escola de Química, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 149, Rio de Janeiro, Brazil.
authors: Juacyara C
authors: JC
authors: Campos
authors: Departamento de Engenharia Sanitária e do Meio Ambiente, Universidade do Estado do Rio de Janeiro, R. São Francisco Xavier, 524-Maracanã, Rio de Janeiro, Brazil.
authors: Daniele M
authors: DM
authors: Bila
authors: Escola de Química, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 149, Rio de Janeiro, Brazil.
authors: Fabiana V
authors: FV
authors: Fonseca
mesh_terms: D045166:Estradiol Congeners / Q000737:chemistry* / Q000302:isolation & purification*; D006861:Hydrogen Peroxide / Q000737:chemistry; D008567:Membranes, Artificial; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D045166:Estradiol Congeners; D008567:Membranes, Artificial; D012722:Sewage; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide
keywords: Micropollutants; Reverse osmosis; Sewage; UV/H2O2