Cr(III) ionic imprinted polyvinyl alcohol/sodium alginate (PVA/SA) porous composite membranes for selective adsorption of Cr(III) ions

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	Cr(III) ionic imprinted polyvinyl alcohol/sodium alginate (PVA/SA) porous composite membranes for selective adsorption of Cr(III) ions
	Chen, Jian Hua ; Li, Guo Ping ; Liu, Qing Lin ; Ni, Jian Cong ; Wu, Wen Bing ; Lin, Jin Mei ; Liu QL(刘庆林)
刊名	http://dx.doi.org/10.1016/j.cej.2010.09.034
	2010-12-01
关键词	AQUEOUS-SOLUTION TRIVALENT CHROMIUM ACTIVATED CARBON REMOVAL BIOSORPTION CR(VI) PB(II) PRECONCENTRATION BIOMASS CD(II)
英文摘要	National Natural Science Foundation of China [21076174]; Zhangzhou Normal University [2003 L20926]; In the present study, we prepared Cr(III) ionic imprinted membrane adsorbents (Cr(III)-PVA/SA) by blending sodium alginate (SA) with polyvinyl alcohol (PVA). In these new membrane adsorbents, polyethylene glycol was used as porogen, and glutaraldehyde was the cross-linking agent. Our new developed membrane adsorbents can be used without centrifugation and filtration. To investigate the adsorption kinetics of Cr(III) ions from aqueous solution onto this newly developed Cr(III)-PVA/SA, we performed a batch of experiments under different conditions by changing the concentration of Cr(III) ions in the Cr(III)-PVA/SA, pH value of the solution, adsorbent close, initial Cr(III) ions concentration, adsorption temperature and contact time. Our Cr(III)-PVA/SA exhibited the maximum Cr(III) ions uptake capacity of 59.9 mg/g under the following conditions: 0.078 wt% of Cr(III) ions in the Cr(III)-PVA/SA, solution pH value of 6.0, adsorbent close of 0.5 g/L, the initial Cr(III) ions concentration of 50 mg/L, at 25 degrees C. To study the mechanism of adsorption process, we examined the intra-particular diffusion model, Lagergren pseudo-first-order kinetic model and pseudo-second-order kinetic model, and found pseudo-second-order kinetic model exhibited the best correlation with our experimental data. Furthermore, our adsorption equilibrium data could be better described by the Langmuir equation. Competitive adsorption studies of the binary system of Cr(III)/Cu(II), Cr(III)/Cd(II) and the ternary system of Cr(III)/Cu(II)/Cd(II) were also investigated using Cr(III)-PVA/SA, the results indicated that selectively adsorbed amount of Cr(III) ion on Cr(III)-PVA/SA is significantly higher than that of Cu(II) and Cd(II) ions. We also used five times consecutive adsorption-desorption experiments to show that the Cr(III)-PVA/SA has high adsorption and desorption efficiencies. (C) 2010 Elsevier B.V. All rights reserved.
语种	英语
出版者	CHEM ENG J
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88424]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Chen, Jian Hua,Li, Guo Ping,Liu, Qing Lin,et al. Cr(III) ionic imprinted polyvinyl alcohol/sodium alginate (PVA/SA) porous composite membranes for selective adsorption of Cr(III) ions[J]. http://dx.doi.org/10.1016/j.cej.2010.09.034,2010.
APA	Chen, Jian Hua.,Li, Guo Ping.,Liu, Qing Lin.,Ni, Jian Cong.,Wu, Wen Bing.,...&刘庆林.(2010).Cr(III) ionic imprinted polyvinyl alcohol/sodium alginate (PVA/SA) porous composite membranes for selective adsorption of Cr(III) ions.http://dx.doi.org/10.1016/j.cej.2010.09.034.
MLA	Chen, Jian Hua,et al."Cr(III) ionic imprinted polyvinyl alcohol/sodium alginate (PVA/SA) porous composite membranes for selective adsorption of Cr(III) ions".http://dx.doi.org/10.1016/j.cej.2010.09.034 (2010).