title: Chitosan/mangiferin particles for Cr(VI) reduction and removal.
abstract: In this work, chitosan/mangiferin particles (CMP) were prepared by spray-drying technique and characterized by SEM, DLS, FTIR, HPLC-UV and adsorption studies to investigate a possible application as a preventive material in cases of human and animal contamination with Cr(VI). CMP presented sizes ranging from nano to micrometers. Chitosan and mangiferin (MA) presence in the powder was confirmed by FTIR and MA quantification (136 μg/mg) was performed using a calibration curve prepared by HPLC-UV. Adsorption capacity of Cr(VI) onto CMP was compared with chitosan and investigated in a batch system by considering the effects of various parameters like contact time, initial concentration of adsorbent and pH. Cr(VI) removal is pH dependent and it was found to be maximum at pH 5.0. The results showed that CMP has a potential application as a preventive material in cases of human or animal contamination with Cr(VI).
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará, P.O. Box 6.021, 60455-760 Fortaleza, Ceará, Brazil; Federal Institute of Ceará, Fortaleza, Ceará, Brazil. Electronic address: carol-quimica@hotmail.com.
authors.forename: Caroline de G
authors.initials: Cde G
authors.lastname: Sampaio
authors.affiliation: Federal Institute of Ceará, Fortaleza, Ceará, Brazil.
authors.forename: Lucas S
authors.initials: LS
authors.lastname: Frota
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará, P.O. Box 6.021, 60455-760 Fortaleza, Ceará, Brazil. Electronic address: herbertmagalhaes@hotmail.com.
authors.forename: Herbert S
authors.initials: HS
authors.lastname: Magalhães
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará, P.O. Box 6.021, 60455-760 Fortaleza, Ceará, Brazil. Electronic address: lmudutra@hotmail.com.
authors.forename: Lilian M U
authors.initials: LM
authors.lastname: Dutra
authors.affiliation: Federal Institute of Ceará, Fortaleza, Ceará, Brazil. Electronic address: daniloqueiroz46@gmail.com.
authors.forename: Danilo C
authors.initials: DC
authors.lastname: Queiroz
authors.affiliation: Federal Institute of Ceará, Fortaleza, Ceará, Brazil. Electronic address: rinaldo@ifce.edu.br.
authors.forename: Rinaldo S
authors.initials: RS
authors.lastname: Araújo
authors.affiliation: Department of Analytical and Physical Chemistry, Federal University of Ceará, P.O. Box 6.021, 60451-970 Fortaleza, Ceará, Brazil. Electronic address: becker@ufc.br.
authors.forename: Helena
authors.initials: H
authors.lastname: Becker
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará, P.O. Box 6.021, 60455-760 Fortaleza, Ceará, Brazil. Electronic address: jrb_ufc@yahoo.de.
authors.forename: José R R
authors.initials: JR
authors.lastname: de Souza
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará, P.O. Box 6.021, 60455-760 Fortaleza, Ceará, Brazil. Electronic address: naricard@ufc.br.
authors.forename: Nágila M P S
authors.initials: NM
authors.lastname: Ricardo
authors.affiliation: Department of Organic and Inorganic Chemistry, Federal University of Ceará, P.O. Box 6.021, 60455-760 Fortaleza, Ceará, Brazil. Electronic address: trevisan@ufc.br.
authors.forename: Maria T S
authors.initials: MT
authors.lastname: Trevisan
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008863:Microspheres; D053758:Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D012996:Solutions; D044004:Xanthones / Q000737:chemistry*
chemical_list: D012996:Solutions; D044004:Xanthones; D002857:Chromium; C074702:chromium hexavalent ion; C013592:mangiferin; D048271:Chitosan
keywords: Adsorption; Chitosan; Chromium(VI); Encapsulation; Mangiferin; Reduction