Journal of Environmental Health Science Engineering | |
Synthesis and application of Amberlite xad-4 functionalized with alizarin red-s for preconcentration and adsorption of rhodium (III) | |
Mahnaz Taheri Menderjani2  Mohammad Taghiof3  Hassan Hoveidi1  Homayon Ahmad Panahi2  Hossein Sid Kalal3  | |
[1] Graduate Faculty of Environment, University of Tehran, Tehran, Iran;Department of Chemistry, Central Tehran Islamic Azad University, Tehran, Iran;Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Atomic Energy Organization of Iran, Tehran, Iran | |
关键词: Rhodium, Immobilization; Amberlite XAD-4; Solid phase extraction; Environmental measurement; | |
Others : 824152 DOI : 10.1186/1735-2746-9-7 |
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received in 2012-06-07, accepted in 2012-07-20, 发布年份 2012 | |
【 摘 要 】
A new chelating resin was prepared by coupling Amberlite XAD-4 with alizarin red-s through an azo spacer, characterized by infra-red spectroscopy and thermal analysis and studied for Rh(III) preconcentration using inductively coupled plasma atomic emission spectroscopy (ICP-AES) for rhodium monitoring in the environment. The optimum pH for sorption of the metal ion was 6.5. The sorption capacity was found 2.1 mg/g of resin for Rh(III). A recovery of 88% was obtained for the metal ion with 1.5 M HCl as eluting agent. Kinetic adsorption data were analyzed by adsorption and desorption times of Rh(III) on modified resin. Scat chard analysis revealed that the homogeneous binding sites were formed in the polymers. The linear regression equation was Q/C = –1.3169Q + 27.222 (R2 = 0.9239), for Rh were formed in the SPE sorbent,Kd and Qmax for the affinity binding sites were calculated to be 0.76 μmol/mL and 20.67 μmol/g, respectively. The equilibrium data and parameters of Rh(III) adsorption on modified resin were analyzed by Langmuir, Freundlich, Temkin and Redlich–Peterson models. The experimental adsorption isotherm was in good concordance with Langmuir and Freundlich models (R2 > 0.998) and based on the Langmuir isotherm the maximum amount of adsorption (qmax) was 4.842 mg/g. The method was applied for rhodium ions determination in environmental samples. with high recovery (>80%).
【 授权许可】
2012 Sid Kalal et al.; licensee BioMed Central Ltd.
【 预 览 】
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