title: Efficient biosorption of lead(II) and cadmium(II) ions from aqueous solutions by functionalized cell with intracellular CaCO3 mineral scaffolds.
abstract: The functionalized Saccharomyces cerevisiae cell with biogenic intracellular CaCO3 mineral scaffold, synthesized via a simple and environmentally friendly approach, was efficient for removing lead (II) and cadmium (II) ions from aqueous solutions. The CaCO3 mineral scaffold could promote the uptake of the heavy metal ions and increase the biosorption capabilities of the adsorbent. Compared with the Freundlich isotherm, Langmuir model more fitted the equilibrium data. The maximum removal capacity of functionalized cells for Pb(II) and Cd(II) was 116.69 and 42.63mgg(-1), respectively. Further investigation showed that the adsorbent had high removal efficiency for trace amount of heavy metal ions. Adsorption data were modeled using the pseudo-first-order, pseudo-second-order and intra-particle diffusion kinetics equations. The results indicated that pseudo-second-order kinetic equation and intra-particle diffusion model could better describe the adsorption kinetics. The heavy metal ions might be removed by functionalized cells via membrane transport of metal ions and precipitation transformation.
authors.affiliation: Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Engineering Laboratory of Chemical Pharmaceuticals & Biomedical Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China. Electronic address: sunshinyma@hotmail.com.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Ma
authors.affiliation: Department of Human Anatomy, School of Basic Medical Sciences, Xinxiang Medical University, Henan 453003, PR China.
authors.forename: Weigang
authors.initials: W
authors.lastname: Cui
authors.affiliation: Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Engineering Laboratory of Chemical Pharmaceuticals & Biomedical Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China.
authors.forename: Lin
authors.initials: L
authors.lastname: Yang
authors.affiliation: Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Engineering Laboratory of Chemical Pharmaceuticals & Biomedical Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Engineering Laboratory of Chemical Pharmaceuticals & Biomedical Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China.
authors.forename: Huifeng
authors.initials: H
authors.lastname: Chen
authors.affiliation: Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Engineering Laboratory of Chemical Pharmaceuticals & Biomedical Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China.
authors.forename: Kui
authors.initials: K
authors.lastname: Wang
mesh_terms: D065567:Absorption, Physiological / Q000502:physiology; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000302:isolation & purification / Q000378:metabolism*; D002119:Calcium Carbonate / Q000737:chemistry / Q000378:metabolism*; D007477:Ions; D007854:Lead / Q000302:isolation & purification / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D012996:Solutions; D054457:Tissue Scaffolds; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
chemical_list: D007477:Ions; D012996:Solutions; D014874:Water Pollutants, Chemical; D002104:Cadmium; D014867:Water; D007854:Lead; D002119:Calcium Carbonate
keywords: Biosorption; Functionalized cell; Heavy metal ion; Precipitation transformation; Wastewater treatment