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Adsorption Behavior of EDTA-Graphene Oxide for Pb (II) Removal
Abstract
Chelating groups are successfully linked to graphene oxide (GO) surfaces through a silanization reaction between N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and hydroxyl groups on GO surface. EDTA-GO was found to be an ideal adsorbent for Pb(II) removal with a higher adsorption capacity. EDTA-modification enhances the adsorption capacity of GO because of the chelating ability of ethylene diamine triacetic acid. This study investigates the adsorption and desorption behaviors of heavy metal cations and the effects of solution conditions such as pH on Pb(II) removal. The adsorption capacity for Pb(II) removal was found to be 479 ± 46) mg/g at pH 6.8, and the adsorption process was completed within 20 min. The Langmuir adsorption model agrees well with the experimental data. The experimental results suggest that EDTA-GO can be reused after washed with HCl, suggesting potential applications in the environmental cleanup.
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The chemistry of graphene oxide
Dreyer, D. R., Park, S., Bielawski, C. W., & Ruoff, R. S. (2010) · Chem. Soc. Rev. · doi:10.1039/b917103g · Cited by 11,653
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Heavy metals, occurrence and toxicity for plants: a review
Nagajyoti, P. C., Lee, K. D., & Sreekanth, T. V. M. (2010) · Environmental Chemistry Letters · doi:10.1007/s10311-010-0297-8 · Cited by 3,962
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Sitko, R., Zawisza, B., & Malicka, E. (2013) · TrAC Trends in Analytical Chemistry · doi:10.1016/j.trac.2013.05.011 · Cited by 373
Zhang, X., Huang, Q., Liu, M., Tian, J., Zeng, G., Li, Z., Wang, K., Zhang, Q., Wan, Q., Deng, F., et al. (2015) · Applied Surface Science · doi:10.1016/j.apsusc.2015.03.081 · Cited by 329
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“Similarly, to the functionalization of CNT, the GO surface has been surface modified with EDTA for Pb(II) sorption (Madadrang et al., 2012) or poly(amidoamine) for Cu(II), (Zn(II), Pb(II), Fe(III), and Cr(III) sorption (Yuan et al.”
Background
Metadata
- Authors
- Madadrang, C. J., Kim, H. Y., Gao, G., Wang, N., Zhu, J., Feng, H., Gorring, M., Kasner, M. L., & Hou, S.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-02-15
- Volume
- 4
- Issue
- 3
- Pages
- 1186-1193
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W1999380485
- Cited by
- 844
- References
- 3
- FWCI
- 41.58
- Type
- journal article
- Language
- en
- Open access
- closed
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