Preconcentration and determination of chromium in water with flame atomic absorption spectrometry by thiourea-formaldehyde as chelating resin

被引：0
|
作者：
Homayon Ahmad Panahi
Amir Abdollah Mehrdad Sharif
Mehrnaz Bigonah
Elham Moniri
机构：
[1] Islamic Azad University,Department of Chemistry
[2] Central Tehran Branch,Department of Chemistry
[3] Islamic Azad University,Department of Sea Chemistry, Faculty of Marin of Sciences and Technology
[4] North Tehran Branch,Department of Chemistry
[5] Islamic Azad University,undefined
[6] North Tehran Branch,undefined
[7] Islamic Azad University,undefined
[8] Varamin (Pishva) Branch,undefined
来源：
Korean Journal of Chemical Engineering | 2009年 / 26卷
关键词：
Solid Phase Extraction; Thiourea-formaldehyde; Chromium; Preconcentration; Isotherm Study;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Thiourea-formaldehyde chelating resin is synthesized simply and rapidly from thiourea and formaldehyde by condensation polymerization and characterized by IR spectra and studied for the preconcentration and determination of trace Cr(III) ion from solution samples. The optimum pH value for sorption of the metal ion was 6.5. The sorption capacity of resin for Cr(III) was determined. The chelating resin can be reused for 20 cycles of sorption-desorption without any significant change in sorption capacity. A recovery of 96% was obtained for the metal ion with 0.5M HNO3 as eluting agent. The equilibrium adsorption data of Cr(III) on modified resin were analyzed by Langmuir, Freundlich and Temkin models. Based on equilibrium adsorption data the Langmuir, Freundlich and Temkin constants were determined as 0.016, 0.040 and 0.074 at pH 6.5 and 20°C. The method was applied for chromium ion determination from river water sample.
引用
收藏
页码：1723 / 1728
页数：5
相关论文
共 50 条
12345