chitosan resin;
dithiocarbamate;
heavy metals;
elution method;
preconcentartion;
D O I:
10.2116/bunsekikagaku.52.811
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
A chitosan-based resin possessing the dithiocarbamate moiety (DTC-chitosan resin) was synthesized using cross-linked chitosan as a base material. The adsorption behavior of trace metal ions on the DTC-chitosan resin was systematically examined by packing it in a mini-column (1 ml of the resin) and measuring the recovery by ICP-MS. The resin could adsorb almost 100% of 7 kinds of metals(Cu, Mo, Ag, Te, W, Hg and Bi) at pH ranges from acidic to neutral. However, elution of these metals from the resin-was difficult. In this study, we improved the recovery efficiency by a pretreatment of the resin: the resin was added to 100 ml of a 0.1 M copper sulfate solution, stirred for 24 h and washed sufficiently with I M nitric acid and water. With this pretreatment, metals adsorbed on 1 ml of the resin were readily eluted with I M nitric acid (10 ml). This method was applied to the determination of metals in river-water samples; the RSDs (10-fold preconcentration) were within 5%.
机构:
Department of Chemistry and Chemical Engineering, Central South University, Changsha 410083, ChinaDepartment of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
Zhong, Hong
Wang, Shuai
论文数: 0引用数: 0
h-index: 0
机构:
Department of Chemistry and Chemical Engineering, Central South University, Changsha 410083, ChinaDepartment of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
Wang, Shuai
Qiu, Yun-Ren
论文数: 0引用数: 0
h-index: 0
机构:
Department of Chemistry and Chemical Engineering, Central South University, Changsha 410083, ChinaDepartment of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
Qiu, Yun-Ren
Wang, Ai-Ping
论文数: 0引用数: 0
h-index: 0
机构:
Department of Chemistry and Chemical Engineering, Central South University, Changsha 410083, ChinaDepartment of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
Wang, Ai-Ping
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering,
2007,
7
(04):
: 689
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693