A New L-Cysteine-Functionalized Mesoporous Composite and Its High Selectivity Separation and Enrichment Properties for Hg(II)

作者：Li Qing; Wang Zheng^*; Zhu Yan; Zou Hui-Jun; Qu Hai-Yun; Fang Dong-Mei; Hu Hui-Lian; Du Yi-Ping

来源：Chinese Journal of Analytical Chemistry, 2013, 41(1): 93-97.

DOI：10.3724/SP.J.1096.2013.20363

• L-cysteine
• Mesoporous materials
• Mercury(II)
• Selectivity
• Separation and preconcentration

A L-cysteine-functionalized mesoporous composite was prepared and modified by post. grafting method. The adsorption conditions were optimized and the adsorption property of the composite for Hg2+ was investigated. Effects of medium pH, adsorption time, and adsorbent dosage on Hg2+ adsorption were studied. The L-cysteine-functionalized mesoporous SBA. 15 can selectively adsorb Hg2+ at pH 2.5 in case of the coexisted Cu(II), Cr(VI), Cr(III), Cd(II). Hg2+ can be quickly eluated from the composite with a solution of 5% thiourea in 1 mol/L HCl. The detection limit for Hg2+ was 0.07 mu g/L, and the relative standard deviation (RSD) was 2.2% (CHg2+ = 1.0 mg/L, n = 11). The presented procedure has been applied to the Hg2+ determination in waste water with the recovery in the range of 92%-101%.

• 出版日期2013-1
• 单位华东理工大学; 中国科学院上海硅酸盐研究所