title: Selective biosorption behavior of Escherichia coli biomass toward Pd(II) in Pt(IV)-Pd(II) binary solution.
abstract: This study reports a new finding that the industrial waste biomass of Escherichia coli is capable of selective binding of Pd(II) in the Pd(II)-Pt(IV) bimetal solution. Batch sorption experiments with E. coli were carried out at different initial metal concentrations in single and bimetal systems. In the single metal systems, the maximum sorption capacities of E. coli for Pt(IV) and Pd(II) were found to be 45.65 ± 2.04 and 38.87 ± 2.08 mg/g, respectively. Meanwhile, in the bimetal system, the maximum sorption capacities for Pd(II) and Pt(IV) were 33.16 ± 1.53 and 7.32 ± 0.29 mg/g, respectively, which corresponded to 4.53 times of selective adsorption toward Pd(II). In order to understand the underlying reason, ion exchange resins (TP214 and Amberjet 4200) with different amine types were compared with the E. coli biomass. As a result, it was found that the sorbents containing primary amine groups could selectively adsorb Pd(II) more easily in the binary mixture.
authors.affiliation: School of Chemical Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea.
authors.forename: Sok
authors.initials: S
authors.lastname: Kim
authors.affiliation: School of Chemical Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea.
authors.forename: Myung-Hee
authors.initials: MH
authors.lastname: Song
authors.affiliation: School of Chemical Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea.
authors.forename: Wei
authors.initials: W
authors.lastname: Wei
authors.affiliation: School of Chemical Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea; Department of Bioprocess Engineering, Chonbuk National University, Jeonbuk 561-756, Republic of Korea. Electronic address: ysyun@jbnu.ac.kr.
authors.forename: Yeoung-Sang
authors.initials: YS
authors.lastname: Yun
mesh_terms: D000327:Adsorption; D000588:Amines / Q000737:chemistry; D018533:Biomass; D004926:Escherichia coli / Q000378:metabolism*; D007220:Industrial Waste; D007475:Ion Exchange Resins / Q000737:chemistry; D007700:Kinetics; D008956:Models, Chemical; D010165:Palladium / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D000588:Amines; D007220:Industrial Waste; D007475:Ion Exchange Resins; D012996:Solutions; D014874:Water Pollutants, Chemical; D010984:Platinum; D010165:Palladium
keywords: Biosorption; E. coli; Palladium (Pd); Platinum (Pt); Selective