title: Design, characterization and evaluation of hydroxyethylcellulose based novel regenerable supersorbent for heavy metal ions uptake and competitive adsorption.
abstract: Hydroxyethylcellulose succinate-Na (HEC-Suc-Na) was designed and evaluated for removal of some heavy metal ions from aqueous solution. Pristine sorbent HEC-Suc-Na was thoroughly characterized by FTIR and solid-state CP/MAS13C NMR spectroscopy, SEM-EDS and zero point charge analyses. Langmuir isotherm, pseudo second order kinetic and ion exchange models provided best fit to the experimental data of sorption of metal ions. Maximum sorption capacities of supersorbent HEC-Suc-Na for sorption of heavy metal ions from aqueous solution as calculated by Langmuir isotherm model were found to be 1000, 909.09, 666.6, 588 and 500mgg-1for Pb(II), Cr(VI), Co(II), Cu(II) and Ni(II), respectively. Competitive sorption of these heavy metal ions was carried out from galvanic and nuclear waste water simulated environment. The negative values of ΔG° and ΔH° indicated spontaneity and exothermic nature of sorption. The sorbent was efficiently regenerated with no significant decrease in sorption capacity after five cycles.
authors.affiliation: Department of Chemistry, University of Sargodha, Sargodha 40100, Pakistan.
authors.forename: Azhar
authors.initials: A
authors.lastname: Abbas
authors.affiliation: Department of Chemistry, University of Sargodha, Sargodha 40100, Pakistan. Electronic address: majaz172@yahoo.com.
authors.forename: Muhammad Ajaz
authors.initials: MA
authors.lastname: Hussain
authors.affiliation: Department of Chemistry, University of Sargodha, Sargodha 40100, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Sher
authors.affiliation: Department of Chemistry, University of Sargodha, Sargodha 40100, Pakistan.
authors.forename: Muhammad Imran
authors.initials: MI
authors.lastname: Irfan
authors.affiliation: Institute of Inorganic and Analytical Chemistry, Johannes Guttenberg University, Duesbergweg 10-14, 55128 Mainz, Germany.
authors.forename: Muhammad Nawaz
authors.initials: MN
authors.lastname: Tahir
authors.affiliation: Institute of Inorganic and Analytical Chemistry, Johannes Guttenberg University, Duesbergweg 10-14, 55128 Mainz, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Tremel
authors.affiliation: Department of Chemistry, SBA School of Science & Engineering (SSE), Lahore University of Management Sciences (LUMS), DHA, Lahore Cantt, 54792, Pakistan.
authors.forename: Syed Zajif
authors.initials: SZ
authors.lastname: Hussain
authors.affiliation: Department of Chemistry, SBA School of Science & Engineering (SSE), Lahore University of Management Sciences (LUMS), DHA, Lahore Cantt, 54792, Pakistan.
authors.forename: Irshad
authors.initials: I
authors.lastname: Hussain
mesh_terms: D000327:Adsorption; D002482:Cellulose / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D015195:Drug Design; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D019216:Metals, Heavy / Q000737:chemistry* / Q000302:isolation & purification*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D002482:Cellulose; C002283:hydroxyethylcellulose
keywords: Cellulose; Competitive adsorption; Hydroxyethylcellulose; Metal uptake; Succinylation