Skip to main content Accessibility help
×
Home

Polymer Pendant Crown Thioethers for Removal of Mercury from Acidic Waste Streams-Characterization and Extraction Performance

  • Theodore F. Baumann (a1), Glenn A. Fox (a1), Art J. Nelson (a1), Joy C. Andrews (a2), Darrell B. Bishop (a2) and John G. Reynolds (a1)...

Abstract

The removal and immobilization of mercury(II) ions from industrial waste streams is a difficult and expensive problem requiring a robust extractant that is resistant to corrosive conditions. We have now developed an acid-resistant thiacrown polymer that has potential utility as a selective and cost-effective Hg2+ extractant. A new crown thioether, 2-hydroxymethyl-1,4,8,11,14-pentathiacycloheptadecane ([17] aneS5-OH), was synthesized through reaction of 2,3-dimercapto-1-propanol with 4,7,10-trithiatridecane-1,13-di-p-toluenesulfonate; then treated with thionyl chloride to form 2-chloromethyl-1,4,8,11,14-pentathiacycloheptadecane ([17] aneS5-Cl); followed by conversion to 2-(N-methyl)aminomethyl-1,4,8,11,14-pentathiacycloheptadecane ([17] aneS5-NHMe), through reaction with methylamine. The synthesis of the 4-vinylbenzyl-substituted thiacrown was readily accomplished by treating with 4-vinylbenzyl chloride. Co-polymerization of the 4-vinylbenzyl-substituted thiacrown with DVB (80% divinylbenzene) using AIBN as the radical initiator generated the highly cross-linked crown thioether polymer. The polymer based material was tested for Hg(II) extraction activity from acidic solutions. The material was found to extract 95+% of the Hg in a pH range of around 1.5 to over 6.0, with contact times of less than 30 min and in the presence of high concentration of competing ions such as Pb, Cd, Al, and Fe. The spent polymer could also be stripped of the Hg2+ and reused without sufficient loss of loading capacity. Characterization of the binding sites by XPS and XAS show only some of the S atoms in the thiacrown participate in the binding of Hg. Our results indicate this polymer has the potential to treat highly acidic wastes efficiently. This thiacrown polymer is far more effective in extracting Hg2+ from aqueous solution than previously reported Hg2+ extrac-tants, not only being very fast and efficient and selective, but also independent of pH.

Copyright

References

Hide All
1. Baumann, T. F., Reynolds, J. G., and Fox, G. A.. Chem. Commun. 16371638 (1998).
2. Cooper, S. R.. Acc. Chem. Res. 21, 141 (1988).
3. (a) Sevdi'c, D., and Meider, H.. J. Inorg. Nucl. Chem., 43, 153 (1981).
(b) Sevdi'c, D., Fekete, L., and Meider, H.. J. Inorg. Nucl. Chem. 42, 885 (1980).
(c) Sevdi'c, D., and Meider, H.. J. Inorg. Nucl. Chem. 39, 1409 (1977).
4. Moyer, B. A., Case, G. N., Alexandratos, S. D., Kriger, A. A.. Anal. Chem. 65, 3389 (1993).
5. (a) Yamahita, K., Kurita, K., Ohara, K., Tamura, K., Nango, M., and Tsuda, K.. React. Funct. Polymers 31, 47 (1996).
(b) Tomoi, M., Abe, O., Takasu, N., and Kakiuchi, H.. Makromol. Chem. 184, 2431 (1983).
(c) Oue, M., Kimura, K., and Shono, T.. Analyst 113, 551 (1988).
(d) Troansky, E. I., Pogosyan, M. S., Samoshina, N. M., Nikishin, G. I., Samoshin, V. V., Shpigun, L. K., Kopytova, N. E., and Kamilova, P. M.. Mendeleev Commun. 9 (1996).
6. Baumann, T. F., Reynolds, J. G., and Fox, G. A., Reac. Func. Polym. 44, 111120 (2000).
7. Nelson, A. J., Reynolds, J. G., Baumann, T. F., and Fox, G. A., Appl. Surf. Sci. 167, 205215 (2000).
8. Bishop, D. B., McCool, G. D., Nelson, A. J., Reynolds, J. G., Baumann, T. F., Fox, G. A., DeWitt, J. G., Andrews, J. C., Microchemical Journal 71 (2–3), 247254 (2002).
9. Wolf, R. E. Jr, Hartman, J. R., Foxman, B. M., Cooper, S. R., J. Am. Chem. Soc. 109, 4328 (1987).

Polymer Pendant Crown Thioethers for Removal of Mercury from Acidic Waste Streams-Characterization and Extraction Performance

  • Theodore F. Baumann (a1), Glenn A. Fox (a1), Art J. Nelson (a1), Joy C. Andrews (a2), Darrell B. Bishop (a2) and John G. Reynolds (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed