title: Degradation of organics in reverse osmosis concentrate by electro-Fenton process.
abstract: The present work studied, for the first time, the removal of organic pollutants from a high-salinity reverse osmosis (RO) concentrate by electro-Fenton approach using a graphite-felt as cathode. To gain insights into the process, the in situ generation of hydrogen peroxide was also investigated. The COD removal efficiency and energy consumption were optimized by investigating the effects of some important operating parameters such as ferric ion concentration, initial pH and cathodic potential. Under the conditions of cathodic potential at -0.72V and Fe(3+) concentration 0.2mM, more than 62% COD could be removed in 3h treatment, meeting the local wastewater discharge requirement (COD <50mg/L). It confirmed the feasibility of electro-Fenton process for the treatment of RO concentrate accounting for its cost-effectiveness in wide pH ranges.
authors.affiliation: Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. zhoumh@nankai.edu.cn
authors.forename: Minghua
authors.initials: M
authors.lastname: Zhou
authors.forename: Qingqing
authors.initials: Q
authors.lastname: Tan
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.forename: Yongli
authors.initials: Y
authors.lastname: Jiao
authors.forename: Nihal
authors.initials: N
authors.lastname: Oturan
authors.forename: Mehmet A
authors.initials: MA
authors.lastname: Oturan
mesh_terms: D057919:Biological Oxygen Demand Analysis; D004563:Electrochemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry*; D009995:Osmosis; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron