期刊
BIORESOURCE TECHNOLOGY
卷 185, 期 -, 页码 70-78出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.02.074
关键词
Wastewater treatment; Biosorption; Functionalized cell; Heavy metal ion; Precipitation transformation
资金
- National Science Foundation of China [20771036, 21271065]
- NFSC-Henan Talent Training United Fund [U1204519]
- Program for Science Technology Innovation Talents in Universities of Henan Province [14HASTIT010]
- Scientific and Technological Research Key Projects of Education Department of Henan province [12A150014]
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 42.63 mg g(-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. (C) 2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据