Skip to main content
SpringerLink
Log in

Modified silica gel with 5-amino-1,3,4-thiadiazole-2-thiol for heavy metal ions removal

  • Published:
Journal of Porous Materials Aims and scope Submit manuscript

Abstract

A two sorbents was to synthesize for heavy metals removal: silica gel modified with 5-amino-1,3,4-thiadiazole-2-thiol (S5A) and pure silica gel. Modification of silica gel is achieved by tetraethyl orthosilicate (TEOS) preliminary hydrolyzed at room temperature. 5-Amino-1,3,4-thiadiazole-2-thiol is added, with continuous stirring with a magnetic stirrer, to the hydrolyzed TEOS. Pure silica gel (sample SG) is obtained by the classical sol–gel method using the same conditions and initial component ratios. The sorbents have been characterized as to their surface area, pore volumes, content of the functional groups, IR spectra, sulfur and nitrogen content. Their sorption properties to heavy (Cu(II), Co(II), Ni(II), Cd(II), Pb(II) and Hg(II) metals are investigated. The investigations indicate that modified silica gel is characterized by a relatively higher sorption capacity than is the unmodified one. The highest sorption capacity belongs to Hg(II) in presence of unmodified silica gel due to which this sorbent can be used for selective extraction of mercury ions from aqueous solutions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

References

  1. I. Alcantara, P. Roldan, G. Castro, F. Moraes, F. Silva, C. Padilha, G. Oliveira, P. Padilha, Anal. Sci. 20, 1029 (2004). doi:10.2116/analsci.20.1029

    Article  CAS  Google Scholar 

  2. A. Prado, J. Sales, R. Carvalho, J. Rubim, C. Airoldi, J. Non-Cryst. Solids 61, 3331 (2004)

    Google Scholar 

  3. R. Wilken, Fresenius Z Anal. Chem. 342, 795 (1992). doi:10.1007/BF00322136

    Article  CAS  Google Scholar 

  4. Z. Fang, T. Guo, B. Welz, Talanta 38, 613 (1991). doi:10.1016/0039-9140(91)80144-O

    Article  CAS  Google Scholar 

  5. Y. Zolotov, B. Spivakov, T. Baslsholov, I. Paulenko, Fresenius Z Anal. Chem. 355, 938 (1989). doi:10.1007/BF00466386

    Article  Google Scholar 

  6. A. Howard, M. Volkan, O. Ataman, Analyst (Lond) 112, 159 (1987). doi:10.1039/an9871200159

    Article  CAS  Google Scholar 

  7. M. Volkan, O. Ataman, A. Howard, Analyst (Lond) 112, 1409 (1987). doi:10.1039/an9871201409

    Article  CAS  Google Scholar 

  8. M. Mahmoud, G. Gohar, Talanta 51, 77 (2000). doi:10.1016/S0039-9140(99)00249-0

    Article  CAS  Google Scholar 

  9. E. Soliman, M. Saleh, S. Ahmed, Anal. Chim. Acta 523, 133 (2004). doi:10.1016/j.aca.2004.07.002

    Article  CAS  Google Scholar 

  10. D. Perez-Quintanilla, I. del Hierro, M. Fajardo, I. Sierra, Microporous Mesoporous Mater. 89, 58 (2006). doi:10.1016/j.micromeso.2005.10.012

    Article  CAS  Google Scholar 

  11. G. Hernandez, R. Rodriguez, J. Non-Cryst. Solids 246, 209 (1999). doi:10.1016/S0022-3093(99)00073-3

    Article  CAS  Google Scholar 

  12. E. Mahhmoud, E. Soliman, Talanta 44, 1063 (1997). doi:10.1016/S0039-9140(96)02194-7

    Article  Google Scholar 

  13. N. Tokman, S. Akman, M. Ozakan, U. Koklu, Anal. Bioanal. Chem. 374, 977 (2002). doi:10.1007/s00216-002-1537-y

    Article  CAS  Google Scholar 

  14. P. Padilha, L. Gomes, C. Padilha, J. Moreira, N. Filho, Anal. Lett. 32, 1807 (1999)

    Article  CAS  Google Scholar 

  15. H. Dislich, J. Non-Cryst. Solids 80, 115 (1986). doi:10.1016/0022-3093(86)90384-4

    Article  CAS  Google Scholar 

  16. C. Pierce, J. Phys. Chem. 57, 149 (1953). doi:10.1021/j150503a005

    Article  CAS  Google Scholar 

  17. V. Mavrodinova, M. Popova, V. Valchev, R. Nickolov, C. Minchev, J. Colloid Interface Sci. 286, 268 (2005). doi:10.1016/j.jcis.2005.01.006

    Article  CAS  Google Scholar 

  18. C. Brouwn, P. Hall, Trans. Faraday Soc. 67, 3558 (1971). doi:10.1039/tf9716703558

    Article  Google Scholar 

  19. A. Lecloux, J. Pirard, J. Colloid Interface Sci. 70, 265 (1979). doi:10.1016/0021-9797(79)90031-6

    Article  CAS  Google Scholar 

  20. R. Pearson, J. Am. Chem. Soc. 85, 3533 (1963). doi:10.1021/ja00905a001

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad.G.Bontchev str., bl.11, 1113, Sofia, Bulgaria

    P. Tzvetkova, P. Vassileva & R. Nickolov

Authors
  1. P. Tzvetkova
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. P. Vassileva
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. R. Nickolov
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to P. Tzvetkova.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Tzvetkova, P., Vassileva, P. & Nickolov, R. Modified silica gel with 5-amino-1,3,4-thiadiazole-2-thiol for heavy metal ions removal. J Porous Mater 17, 459–463 (2010). https://doi.org/10.1007/s10934-009-9308-1

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10934-009-9308-1

Keywords

Search

Navigation