title: Removal of chromium from electroplating industry effluents by ion exchange resins.
abstract: Effluent discharged from the chromium electroplating industry contains a large number of metals, including chromium, copper, nickel, zinc, manganese and lead. The ion exchange process is an alternative technique for application in the treatment of industrial wastewater containing heavy metals and indeed it has proven to be very promising in the removal and recovery of valuable species. The main objective of the present work is to evaluate the performance of commercial ion exchange resins for removing chromium trivalent from industrial effluents, and for this purpose two resins were tested: a chelating exchange resin (Diaion CR11) and a weak cationic resin (Amberlite IRC86). In order to evaluate the sorption capacity of the resins some equilibrium experiments were carried out, being the temperature and pH the main variables considered. The chromium solutions employed in the experiments were synthetic solutions and industrial effluents. In addition, a transient test was also performed as an attempt to understand the kinetic behaviour of the process.
authors.affiliation: GERSA Group, Chemical Engineering Department, University of Coimbra, Pólo II, Street Sílvio Lima, 3030-790 Coimbra, Portugal.
authors.forename: Sofia A
authors.initials: SA
authors.lastname: Cavaco
authors.forename: Sandra
authors.initials: S
authors.lastname: Fernandes
authors.forename: Margarida M
authors.initials: MM
authors.lastname: Quina
authors.forename: Licínio M
authors.initials: LM
authors.lastname: Ferreira
mesh_terms: D000327:Adsorption; D002857:Chromium / Q000737:chemistry / Q000302:isolation & purification*; D004595:Electroplating; D007220:Industrial Waste; D007475:Ion Exchange Resins / Q000737:chemistry*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D007220:Industrial Waste; D007475:Ion Exchange Resins; D014874:Water Pollutants, Chemical; D002857:Chromium