title: Effective Reuse of Electroplating Rinse Wastewater by Combining PAC with H2O2/UV Process.
abstract: This study evaluated the performance of treating electroplating rinse wastewater by powder activated carbon (PAC) adsorption, H2O2/UV oxidation, and their combination to remove organic compounds and heavy metals. The results showed that neither the process of PAC adsorption nor H2O2/UV oxidation could reduce COD to 100 mg/L, as enforced by the Taiwan Environmental Protection Agency. On the other hand, the water sample treated by the combined approach of using PAC (5 g/L) pre-adsorption and H2O2/UV post-oxidation (UV of 64 W, H2O2 of 100 mg/L, oxidation time of 90 min), COD and DOC were reduced to 8.2 mg/L and 3.8 mg/L, respectively. Also, the combined approach reduced heavy metals to meet the effluent standards and to satisfy the in-house water reuse criteria for the electroplating factory. The reaction constant analysis indicated that the reaction proceeded much more rapidly for the combined process. Hence, it is a more efficient, economic and environmentally friendly process.
authors.affiliation: Department of Chemical and Biochemical Engineering, Kao Yuan University, Taiwan (R.O.C).
authors.forename: Hsing Yuan
authors.initials: HY
authors.lastname: Yen
authors.forename: Shyh-Fang
authors.initials: SF
authors.lastname: Kang
authors.forename: Chen Pei
authors.initials: CP
authors.lastname: Lin
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D004595:Electroplating; D006861:Hydrogen Peroxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D002606:Charcoal; D006861:Hydrogen Peroxide; D062065:Wastewater