期刊
CHEMOSPHERE
卷 200, 期 -, 页码 173-179出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2018.02.078
关键词
Magnetic PVA; Endophyte (Bacillus licheniformis); Lead ions; Biosorbent
资金
- Program for the National Natural Science Foundation of China [51109016, 51521006, 51579098, 51408206, 51308068, 51308069, 51378190]
- National Program for Support of Top-Notch Young Professionals of China
- Program for New 333 Century Excellent Talents in University [NCET-13-0186]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
- Hunan Provincial Science and Technology Plan Project [2016RS3026]
- Key Laboratory of Water Sediment Sciences and Water Disaster Prevention of Hunan Province, China [2014SS05]
- Changsha science and technology program [KQ1602031]
Magnetic polyving akohol (PVA) immobilized the endogenous bacterium Bacillus licheniformis with sodium alginate to get a novel biosorbent. The optimum preparation and adsorption conditions were studied. The optimal preparation conditions was the fraction of magnetic PVA was 9%, the fraction of sodium alginate was 0.8%, the fraction of microbial suspensions was 5% and the crosslinking time was 20 h. The best adsorption conditions were listed as follows: pH was 6, the biosorbent dosage was 0.7 g L-1, the initial concentration of lead ions was 200 mg L-1 and the optimal adsorption time was 12 h. The results of SEM and FTIR spectroscopy analysis displayed this novel biosorbents had good structure and the functional groups on the surface was abundant. The VSM analysis confirmed the novel biosorbents had good magnetic magnetization and were easily separated from aqueous medium. Under the optimum conditions, the removal rate of lead ions from waste water could reach 98%, the calculated maximum adsorption capacity could be up to 113.84 mg g(-1). The whole adsorption process was well fit by the pseudo-second order kinetic and it was also a Langmuir monolayer adsorption. The desorption experiments showed the biosorbent had good re-usability. (C) 2018 Elsevier Ltd. All rights reserved.
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