Heavy Metals And Rare Metals Ions, Application Of Calixarene Derivatives Recycling Wastewater

Calixarene is a kind of respecting host macrocyclic compound, followed cyclodextrin and crown ether, and has strong ability of selective extraction of metal ions. P-tert-butylcalix[4]arene and its derivatives are synthesized in the experiment. Selective extraction for silver, mercury and chromium ions is also studied in this paper. Waste liquid produced in the experiment are recovered. According to the analysis of NMR and FTIR, the structure of p-tert-butylcalix[4]arene synthesized in the experiment is mainly coincide to the literature. The structures of derivative 1,2 and 3 are also determined by FTIR. In the mercury ion extraction experiment, the different conditions of pH, mercury ion concentration and phase ratio, which affect on the extraction efficiency are examined. In the silver ion extraction experiment, the effect of solution's pH is mainly examined. In the chromium ion extraction experiment, the different conditions of pH and chromium ion concentration, which affect on the extraction efficiency are examined. The results indicate: the derivative 2 has extraction abilities for mercury ion; the derivative 1 has extraction abilities for silver ion; the derivative 3 has extraction abilities for chromium. These results show that the derivative 1, 2 and 3 have selective extraction abilities for mercury, silver and chromium ions. At the end of this paper, the anti extraction abilities of some reagents for mercury and chromium ion are discussed. And calculate the cost of synthesis derivative 1 ,2,3 and the recovering silver, mercury and chromium ions .