title: A review and investigation of the effect of nanophotocatalytic ozonation process for phenolic compound removal from real effluent of pulp and paper industry.
abstract: Phenol and its derivatives are the major environmental pollutants discharged from paper and pulp industries into water bodies. All these compounds and chlorinated phenolic compounds in particular are very toxic to fauna and flora, even at relatively low concentration. This study aimed to investigate the removal rate of phenolic compounds from the effluent of pulp and paper industries using a combination of ozonation and photocatalytic processes. Firstly, a certain volume from the effluent of paper and pulp industries containing certain phenol concentrations was obtained and fed into a prefabricated reactor at laboratory scale. Then, the combined and separate effects of zinc oxide dosage (ZnO), ozone flow rate (O3), and pH under ultra violet radiation for 30 min were evaluated. The concentration of phenolic compounds and the produced ozone gas flow rate were measured by a spectrophotometry and iodometric method, respectively. The results showed that the phenolic removal rate increased at acidic PHs compared with alkaline PHs; it was also decreased with the increase in ZnO dosages. Furthermore, the highest phenolic compound's removal rate was 99% at the optimal condition (pH 5, ZnO dosage of 0.1 g L-1at the 30 min with UV-C illumination of 125 W). Finally, Daphnia toxicity test showed that treated effluent was safe and met the standards to the extent that it can be discharged into the receiving waters. Graphical abstract ᅟ.
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Social Development & Health Promotion Research Center, Gonabad University of Medical Sciences, Gonabad, Iran.
authors.forename: Hamed
authors.identifier: http://orcid.org/0000-0002-9683-6608
authors.initials: H
authors.lastname: Biglari
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Social Development & Health Promotion Research Center, Gonabad University of Medical Sciences, Gonabad, Iran.
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Afsharnia
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Research Center for Social Determinants in Health Promotion, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
authors.forename: Vali
authors.initials: V
authors.lastname: Alipour
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Birjand University of Medical Sciences, Birjand, Iran.
authors.forename: Rasoul
authors.initials: R
authors.lastname: Khosravi
authors.affiliation: Research Center for Environmental Determinants of Health (RCEDH), Kermanshah University of Medical Sciences, Kermanshah, Iran.|Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Kiomars
authors.initials: K
authors.lastname: Sharafi
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. ahmahvi@yahoo.com.|Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran. ahmahvi@yahoo.com.
authors.forename: Amir Hossein
authors.initials: AH
authors.lastname: Mahvi
mesh_terms: D000818:Animals; D002384:Catalysis; D003621:Daphnia; D006863:Hydrogen-Ion Concentration; D010126:Ozone / Q000737:chemistry*; D010209:Paper; D010636:Phenols / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D010636:Phenols; D010126:Ozone
keywords: Ozonation; Phenol; Photocatalyst; Pulp and paper effluent; Real effluent; UV; ZnO