title: Ion exchange sorption of Pb2+ ions on CrPO4.
abstract: The chromium(III) phosphate was observed to have a high affinity towards Pb2+ ion and the sorption capacities were found to be in the order: Pb2+ > Cu2+ > Cd2+ > Ni2+. Different characterization methods i.e. FTIR, SEM and EDX were employed to investigate the sorption mechanism of Pb2+ by chromium(III) phosphate, which showed that no new solid phases were present in the residue after sorption of Pb2+. The exchange between protons from the surface and Pb2+ from solutions was found to be responsible for Pb2+ sorption by chromium (III) phosphate.
authors.affiliation: National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, Pakistan.
authors.forename: S
authors.initials: S
authors.lastname: Mustafa
authors.forename: S
authors.initials: S
authors.lastname: Murtaza
authors.forename: A
authors.initials: A
authors.lastname: Naeem
authors.forename: K
authors.initials: K
authors.lastname: Farina
mesh_terms: D000327:Adsorption; D002413:Cations, Divalent; D017608:Chromium Compounds / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007474:Ion Exchange; D007854:Lead / Q000737:chemistry / Q000302:isolation & purification*; D010710:Phosphates / Q000737:chemistry*; D011522:Protons; D013696:Temperature; D014876:Water Pollution / Q000517:prevention & control; D018508:Water Purification / Q000379:methods*; D014881:Water Supply
chemical_list: D002413:Cations, Divalent; D017608:Chromium Compounds; D010710:Phosphates; D011522:Protons; D007854:Lead; C509369:chromic phosphate