title: A facile approach for surface alteration of Pseudomonas putida I3 by supplying K2SO4into growth medium: Enhanced removal of Pb(II) from aqueous solution.
abstract: A new sight of obtaining a high efficient biosorbent by supplying specific salts into bacterial growth medium was investigated in this study for Pb(II). Among a series of salts including Na2SO4, Na2S2O3, KCl, and K2SO4, the highest Pb(II) removal efficiency was observed by psychrotrophilic Pseudomonas putida I3 grown in the presence of 30g/L K2SO4(KSI3-30) with biosorption capacity of 62.89mg/g under cold condition (15°C), which was increased by 42.35% as compared to control (without any additive, RI3). This stimulation effect was ascribed to the increase of potassium and sulfur containing groups on KSI3-30 surface via metabolic dependent ways. The probable mechanism for Pb(II) adsorption was ion-exchange and chemical complexation. The thermal and kinetic data well fitted to Langmuir adsorption model and pseudo-second order and intraparticle diffusion kinetic model. Good recyclability and effectively dealing with real wastewater suggested KSI3-30 was a promising biosorbent for Pb-contaminated wastewater treatment.
authors.affiliation: Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
authors.forename: Xingjian
authors.initials: X
authors.lastname: Xu
authors.affiliation: Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Li
authors.affiliation: Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
authors.forename: Quanying
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Graduate School of the Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Li
authors.affiliation: Changchun University of Science and Technology, Changchun 130022, China.
authors.forename: Xuerong
authors.initials: X
authors.lastname: Han
authors.affiliation: Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China. Electronic address: yuhw@iga.ac.cn.
authors.forename: Hongwen
authors.initials: H
authors.lastname: Yu
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D056951:Photoelectron Spectroscopy; D016958:Pseudomonas putida / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism* / Q000648:ultrastructure; D012996:Solutions; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D013431:Sulfates / Q000494:pharmacology*; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D007854:Lead; D012996:Solutions; D013431:Sulfates; D062065:Wastewater; D014874:Water Pollutants, Chemical; C031512:potassium sulfate
keywords: Biosorption; K(2)SO(4); Pb(II); Pseudomonas putida; Specific salt