title: Ruthenium recovery from acetic acid industrial effluent using chemically stable and high-performance polyethylenimine-coated polysulfone-Escherichia coli biomass composite fibers.
abstract: Recovery of precious metal ions from waste effluents is of high concern. In general, ruthenium (Ru) is used in the Cativa process as promoter for carbonylation catalyst and discharged into acetic acid effluent. In the present work, we have designed and developed polyethylenimine-coated polysulfone-bacterial biomass composite fiber (PEI-PSBF) to recover Ru from industrial effluent. The sorbent was manufactured by electrostatic attachment of polyethylenimine (PEI) to the surface of polysulfone-biomass composite fiber (PSBF), which was prepared through spinning of the mixture of polysulfone and Escherichia coli biomass in N,N-dimethylformamide (DMF) into water. Developed PEI-PSBF was highly stable in the acetic acid effluent. The maximum sorption capacity of the developed sorbent PEI-PSBF, coated with PEI (with M.W. of 75,000), was 121.28±13.15mg/g, which was much higher than those of ion exchange resins, TP214, Amberjet 4200, and M500. The PEI-PSBF could be successfully applied in the flow-through column system, showing 120 beds of breakthrough volume.
authors.affiliation: Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea; Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonbuk 54896, Republic of Korea.
authors.forename: Sok
authors.initials: S
authors.lastname: Kim
authors.affiliation: Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea. Electronic address: yechoi@korea.ac.kr.
authors.forename: Yoon-E
authors.initials: YE
authors.lastname: Choi
authors.affiliation: Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonbuk 54896, Republic of Korea; Department of Bioprocess Engineering, Chonbuk National University, Jeonbuk 54896, Republic of Korea. Electronic address: ysyun@jbnu.ac.kr.
authors.forename: Yeoung-Sang
authors.initials: YS
authors.lastname: Yun
mesh_terms: D019342:Acetic Acid / Q000737:chemistry*; D000327:Adsorption; D018533:Biomass; D004926:Escherichia coli / Q000378:metabolism*; D007220:Industrial Waste; D011094:Polyethyleneimine / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012428:Ruthenium / Q000302:isolation & purification*; D013450:Sulfones / Q000737:chemistry*
chemical_list: D007220:Industrial Waste; D011108:Polymers; D013450:Sulfones; C017662:polysulfone P 1700; D012428:Ruthenium; D011094:Polyethyleneimine; D019342:Acetic Acid
keywords: Ion exchange resin; Precious metal; Recovery; Ruthenium; Sorbent; Sorption