title: A hybrid process combining homogeneous catalytic ozonation and membrane distillation for wastewater treatment.
abstract: A novel catalytic ozonation membrane reactor (COMR) coupling homogeneous catalytic ozonation and direct contact membrane distillation (DCMD) was developed for refractory saline organic pollutant treatment from wastewater. An ozonation process took place in the reactor to degrade organic pollutants, whilst the DCMD process was used to recover ionic catalysts and produce clean water. It was found that 98.6% total organic carbon (TOC) and almost 100% salt were removed and almost 100% metal ion catalyst was recovered. TOC in the permeate water was less than 16 mg/L after 5 h operation, which was considered satisfactory as the TOC in the potassium hydrogen phthalate (KHP) feed water was as high as 1000 mg/L. Meanwhile, the membrane distillation flux in the COMR process was 49.8% higher than that in DCMD process alone after 60 h operation. Further, scanning electron microscope images showed less amount and smaller size of contaminants on the membrane surface, which indicated the mitigation of membrane fouling. The tensile strength and FT-IR spectra tests did not reveal obvious changes for the polyvinylidene fluoride membrane after 60 h operation, which indicated the good durability. This novel COMR hybrid process exhibited promising application prospects for saline organic wastewater treatment.
authors.affiliation: Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Water Resources and Environmental Engineering, East China Institute of Technology, Nanchang, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhao
authors.affiliation: Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.affiliation: Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
authors.forename: Deyin
authors.initials: D
authors.lastname: Hou
authors.affiliation: Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China. Electronic address: junwang@rcees.ac.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.affiliation: Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
authors.forename: Huijuan
authors.initials: H
authors.lastname: Liu
mesh_terms: D002384:Catalysis; D057168:Distillation; D007477:Ions; D008567:Membranes, Artificial; D008670:Metals / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D009930:Organic Chemicals / Q000737:chemistry; D010126:Ozone / Q000737:chemistry*; D010795:Phthalic Acids / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D005465:Fluorocarbon Polymers
chemical_list: D007477:Ions; D008567:Membranes, Artificial; D008670:Metals; D009930:Organic Chemicals; D010126:Ozone; D010795:Phthalic Acids; D011145:Polyvinyls; D062065:Wastewater; D014874:Water Pollutants, Chemical; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers; C032279:phthalic acid
keywords: Homogeneous catalytic ozonation; Membrane distillation; Membrane reactor; Saline organic wastewater