title: Adsorption of As(V), Cd(II) and Pb(II), in Multicomponent Aqueous Systems using Activated Carbons.
abstract: This paper studies the use of two activated carbon samples made of cocoa pod husk (CPH-AC) and one commercial activated carbon sample in the adsorption of As(V), Cd(II) and Pb(II) from multicomponent synthetic solutions and from the Puyango-Tumbes River water, a river located in northwest Peru. The characterization of the activated carbon samples was conducted. The CPH-AC samples exhibited a specific surface area (SBET) between 709 and 1117 m2/g and a pH point of zero charge (pHPZC) between 4.4 ± 0.2 and 5 ± 0.2, while the commercial material gave an SBET value of 775 m2/g and a pHPZC value of 7.6 ± 0.1. All the evaluated samples displayed the capacity to adsorb As(V), Cd(II) and Pb(II) from both aqueous systems. The adsorption efficiency for Pb was outstanding reaching the value of 89%. A pseudo-second order kinetic model was satisfactorily applied for most of the activated carbon samples.
authors.forename: M
authors.initials: M
authors.lastname: Pirilä
authors.forename: G J F
authors.initials: GJF
authors.lastname: Cruz
authors.forename: K
authors.initials: K
authors.lastname: Ainassaari
authors.forename: M M
authors.initials: MM
authors.lastname: Gomez
authors.forename: L
authors.initials: L
authors.lastname: Matějová
authors.forename: R L
authors.initials: RL
authors.lastname: Keiski
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry*; D002099:Cacao / Q000737:chemistry; D002104:Cadmium / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry*; D045483:Rivers / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium; D002606:Charcoal; D007854:Lead; D001151:Arsenic