title: Ion exchange treatment of rinse water generated in the galvanizing process.
abstract: A study was conducted of the viability of using the cationic exchange resins Amberlite IR-120 and Lewatit SP-112 to treat rinse water generated in the galvanizing process as well as acidic wastewater containing zinc (Zn) and iron (Fe). Solutions containing either 100 mg/L of Zn at pH 5.6 (rinse water) or Fe and Zn at concentrations of 320 and 200 mg/L at pH 1.5 (acidic water), respectively, were percolated through packed beds until the resins were exhausted. Breakthrough capacities obtained ranged between 1.1 and 1.5 meq metal/mL resin. The elution of metal and the regeneration of resins were performed with hydrochloric acid. The influence of the flowrate used during the loading stage was also studied, with 0.5 bed volumes/min (3.2 cm/min) found to be the optimum flowrate.
authors.affiliation: Department of Chemical and Environmental Engineering, Higher Polytechnic School of Engineering, University of Oviedo, Gijon, Spain. emara@uniovi.es
authors.forename: Elena
authors.initials: E
authors.lastname: Marañón
authors.forename: Yolanda
authors.initials: Y
authors.lastname: Fernández
authors.forename: Leonor
authors.initials: L
authors.lastname: Castrillón
mesh_terms: D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D007475:Ion Exchange Resins; D014867:Water
chemical_list: D007475:Ion Exchange Resins; D014867:Water