title: Utilization of PEI-modified Corynebacterium glutamicum biomass for the recovery of Pd(II) in hydrochloric solution.
abstract: A new type of biosorbent was developed for binding anionic precious metals through cross-linking waste biomass Corynebacterium glutamicum with polyethylenimine (PEI). This biomass was evaluated for the removal and recovery of palladium and compared to commercial adsorbents, such as Amberjet 4200 Cl, Lewatit Monoplus TP 214, SPC-100, and SPS-200. The kinetic experiments revealed that the sorption equilibrium was reached with 30 min for the PEI-modified biomass. The maximum uptake of the biosorbent was 176.8 mg/g, which was calculated using the Langmuir model. The Pd(II) maximum uptake exhibited the following order: Amberjet 4200 Cl>Lewatit Monoplus TP 214>PEI-modified biomass>SPC-100>SPS-200. Acidified thiourea in 1.0M HCl was used to desorb Pd(II) from all of the sorbents examined.
authors.affiliation: Division of Chemical Engineering and Research Institute of Industrial Technology, Chonbuk National University, Jeonbuk 561-756, Republic of Korea.
authors.forename: Sung Wook
authors.initials: SW
authors.lastname: Won
authors.forename: Jiyeong
authors.initials: J
authors.lastname: Park
authors.forename: Juan
authors.initials: J
authors.lastname: Mao
authors.forename: Yeoung-Sang
authors.initials: YS
authors.lastname: Yun
mesh_terms: D000327:Adsorption; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D048230:Corynebacterium glutamicum / Q000378:metabolism*; D003432:Cross-Linking Reagents / Q000737:chemistry; D004305:Dose-Response Relationship, Drug; D006851:Hydrochloric Acid / Q000737:chemistry; D007700:Kinetics; D010165:Palladium / Q000737:chemistry; D011094:Polyethyleneimine / Q000737:chemistry*; D013499:Surface Properties; D013890:Thiourea / Q000737:chemistry; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods
chemical_list: D003432:Cross-Linking Reagents; D014874:Water Pollutants, Chemical; D010165:Palladium; D011094:Polyethyleneimine; D013890:Thiourea; D006851:Hydrochloric Acid