title: Efficacy and reusability of alginate-immobilized live and heat-inactivated Trichoderma asperellum cells for Cu (II) removal from aqueous solution.
abstract: Cu(II) removal efficacies of alginate-immobilized Trichoderma asperellum using viable and non-viable forms were investigated with respect to time, pH, and initial Cu(II) concentrations. The reusability potential of the biomass was determined based on sorption/desorption tests. Cu(II) biosorption by immobilized heat-inactivated T. asperellum cells was the most efficient, with 134.22mg Cu(II) removed g(-1) adsorbent, compared to immobilized viable cells and plain alginate beads (control) with 105.96 and 94.04mg Cu(II) adsorbed g(-1) adsorbent, respectively. Immobilized non-viable cells achieved equilibrium more rapidly within 4h. For all biosorbents, optimum pH for Cu(II) removal was between pH 4 and 5. Reusability of all biosorbents were similar, with more than 90% Cu(II) desorbed with HCl. These alginate-immobilized cells can be applied to reduce clogging and post-separation process incurred from use of suspended biomass.
authors.affiliation: School of Science, Monash University Sunway Campus, Jalan Lagoon Selatan, Bandar Sunway, 46150 Petaling Jaya, Selangor, Malaysia.
authors.forename: Wei Shang
authors.initials: WS
authors.lastname: Tan
authors.forename: Adeline Su Yien
authors.initials: AS
authors.lastname: Ting
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D001673:Biodegradation, Environmental; D018914:Cells, Immobilized / Q000166:cytology / Q000378:metabolism; D003300:Copper / Q000302:isolation & purification* / Q000494:pharmacology; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D050296:Microbial Viability; D059027:Recycling; D012996:Solutions; D013696:Temperature; D014242:Trichoderma / Q000166:cytology* / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D012996:Solutions; D014874:Water Pollutants, Chemical; D003300:Copper; D020723:Glucuronic Acid