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Title: A facile approach for surface alteration of Pseudomonas putida I3 by supplying K2SO4 into growth medium: Enhanced removal of Pb(II) from aqueous solution
Author: X. J. Xu, H. Y. Li, Q. Y. Wang, D. D. Li, X. R. Han and H. W. Yu
Corresponding Author: 于洪文
Source: Bioresource Technology
Issued Date: 2017
DOI: 10.1016/j.biortech.2017.02.038
Volume: 232, Pages:79-86
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 30 g/L K2SO4 (KSI3-30) with biosorption capacity of 62.89 mg/g under cold condition (15 degrees 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. (C) 2017 Elsevier Ltd. All rights reserved.
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Content Type: 期刊论文
URI: http://ir.iga.ac.cn/handle/131322/7662
Appears in Collections:湿地与全球变化学科组_期刊论文

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