Separation/enrichment of trace Zinc using potassium bromide-dimethylglyoxime-thymolphthalein system

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Tu, Changqing^1 ; Wen, Xinrong^1

College of Chemistry and Environment, Jiaying University, Meizhou, Guangdong

514015, China^1

关键词: Dimethylglyoxime;    Liquid solids;    Potassium bromide;    Quantitative separation;    Synthetic waters;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/2/022007/pdf
DOI  :  10.1088/1755-1315/121/2/022007

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A new method for the separation enrichment of trace Zn2+using microcrystalline thymolphthalein as an adsorbent was established. The separation enrichment behaviour of Zn2+and the conditions for the separation quantitatively of Zn2+with other metal ions were investigated. The possible separation enrichment mechanism of Zn2+was discussed in detail. The results showed that by controlling pH 10.0, in KBr-diacetydioxime(DMG)-thymolphthalein(TP) system, chelate settlement of Zn(DMG)2which formed by Zn2+and DMG was quantitatively adsorbed on the surface of microcrystalline thymolphthalein,and the liquid-solid phases were formed with clear interface, while Cu2+, Bi3+, Al3+, Hg2+could not be adsorbed. The quantitative separation of Zn2+from those metal ions was achieved. The proposed method has been successfully applied to the quantitative separation of trace Zn2+in synthetic water samples with enrichment yield of 93.5%∼99.3%.