负载型纳米钛酸锶钡对水中Cd<SUP>2+</SUP>吸附行为研究

doi:10.3964/j.issn.1000-0593(2009)03-0824-05

Abstract
References
Related Citation (15)

Download: PDF (1557 KB)
Export: BibTeX | EndNote (RIS)

Abstract Nanometer barium-strontium titanate immobilized on silica gel G was successfully prepared by the citrate acid sol-gel method and characterized using X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared spectrophotometer (FTIR). By means of the determination of flame atomic absorption spectrometry(FAAS), the adsorption behavior of immobilized nanometer-barium strontium titanate for cadmium ion was investigated. The results showed that the nanometer barium-strontium titanate was immobilized on the silica gel G firmly, gaining a new sort of adsorbent. And the cadmium ion studied could be quantitatively retained in the pH value range of 4-7. The adsorption behavior followed a Freundlich adsorption isotherm and a pseudo-second-order kinetic model. The thermodynamic constants of the adsorption process, such as enthalpy changes(ΔH), Gibbs free energy changes(ΔG) and entropy changes(ΔS), were evaluated. These showed that the adsorption of cadmium ion by immobilized nanometer barium-strontium titanate was endothermic and spontaneous physical process. The cadmium ion adsorbed could be completely eluted using 1 mol·L^-1 HNO₃. A new method for the determination of trace cadmium ion in water based on this immobilized nanometer barium-strontium titanate preconcentration and FAAS determination was proposed. The method has been applied to the determination of trace cadmium ion in tap water and river water with satisfactory results.

Key words：Immobilized nanometer Barium-strontium titanate;Silica gel G;Adsorption behavior;Cadmium ion;FAAS

Received: 2007-10-08 Accepted: 2008-01-12

ZTFLH:

O657.3

Corresponding Authors: ZHANG Dong E-mail: sylgdxdong@sina.com

Cite this article:

ZHANG Dong,ZHANG Wen-jie,GUAN Xin, et al. Adsorption Behavior of Immobilized Nanometer Barium-Strontium Titanate for Cadmium Ion in Water[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(03): 824-828.

URL:

https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2009)03-0824-05 OR https://www.gpxygpfx.com/EN/Y2009/V29/I03/824

[1] XI Dan-li，SUN Yu-sheng，LIU Xiu-ying(奚旦立, 孙裕生, 刘秀英). Environmental Monitoring(环境监测). Beijing：Higher Education Press(北京: 高等教育出版社)，2004. 73.
[2] Hang Chaozhang, Hu Bin, Jiang Zucheng, et al. Talanta, 2007, 71(3): 1239.
[3] Li Shunxing, Deng Nansheng, Zheng Fengying, et al.Talanta, 2003, 60(6): 1097.
[4] Yin Jun, Jiang Zucheng, Chang Gang, et al. Analytica Chimica Acta, 2005, 540(1): 333.
[5] SU Hui-dong, ZHANG Dong(苏会东, 张东). J. Chem. Ind. Eng(化工学报), 2006, 57(12): 2892.
[6] ZHANG Dong, SU Hui-dong, GAO Hong(张东, 苏会东, 高虹). Metal. Anal.(冶金分析), 2007, 27(4): 7.
[7] ZHANG Dong, SU Hui-dong, GAO Hong(张东, 苏会东, 高虹). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2008, 28(1): 218.
[8] ZHANG Dong, SU Hui-dong, GAO Hong, et al(张东, 苏会东, 高虹, 等). Acta Chim. Sinica(化学学报), 2007, 65(22): 2549.
[9] ZHANG Dong, SU Hui-dong, GAO Hong(张东, 苏会东, 高虹). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2008, 28(3): 693.
[10] Mao Chaoliang, Dong Xianlin, Zeng Tao. Materials Letters, 2007, 61(8-9): 1633.
[11] Wang Zheng, Jiang Shenglin, Li Guangxing, et al. Ceramics International, 2007, 33(6): 1105.
[12] WU Jin-guang(吴瑾光). FTIR Technology and Applications in Recent Years(近代傅里叶变换红外光谱技术及应用·下卷). Beijing: Science and Technology Literature Press(北京: 科学技术文献出版社), 1994. 267.
[13] LIU Fu-qiang, CHEN Jin-long, LI Ai-min, et al(刘福强, 陈金龙, 李爱民, 等). Acta Poly. Sin.(高分子学报), 2004, (5): 661.
[14] WEI Rui-xia，CHEN Jin-long，CHEN Lian-long, et al(魏瑞霞, 陈金龙, 陈连龙, 等). Chem. J. Chin. Univ.(高等学校化学学报), 2004, 25(11): 2095.
[15] Liu Yan, Liang Pei, Guo Li. Talanta, 2005, 68(1): 25.
[16] State Environmental Protection Administration of China(国家环境保护总局编). Analysis Method of Water and Waste Water, 4th Ed(水和废水监测分析方法, 第4版). Beijing: China Environmental Science Press(北京: 中国环境科学出版社), 2002. 323.