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Mechanisms of Lead Adsorption on Chitosan/PVA Hydrogel Beads
Abstract
Removal of lead from aqueous solution with chitosan/PVA (poly(vinyl alcohol)) hydrogel beads was studied in batch adsorption experiments at various solution pH values (2−7.6). Lead adsorption on chitosan/PVA beads was found to be strongly pH-dependent and displayed a maximum uptake capacity at pH around 4 and a minimum at pH about 6.4. ζ-Potential study indicated that chitosan/PVA beads possessed positive ζ-potentials at pH < 6.3 and negative ζ-potentials at pH > 6.3. Hence, adsorption occurred even though the interaction between lead and chitosan/PVA beads was electrostatically repulsive at pH < 6.3. Complexation, ion exchange, and electrostatic interaction are all believed to play a role in lead adsorption on chitosan/PVA beads, but the relative importance of each of these mechanisms varies with solution pH values. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy spectra suggested that lead adsorption was mainly through interactions with the N atoms in chitosan in the pH range studied.
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Cited by
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The synthesis of chitosan-based silver nanoparticles and their antibacterial activity
Wei, D., Sun, W., Qian, W., Ye, Y., & Ma, X. (2009) · Carbohydrate Research · doi:10.1016/j.carres.2009.09.001 · Cited by 665
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Deng, S., & Ting, Y.-P. (2005) · Water Research · doi:10.1016/j.watres.2005.03.033 · Cited by 425
Hydrogel applications for adsorption of contaminants in water and wastewater treatment
Van Tran, V., Park, D., & Lee, Y.-C. (2018) · Environmental Science and Pollution Research · doi:10.1007/s11356-018-2605-y · Cited by 398
Futalan, C. M., Kan, C.-C., Dalida, M. L., Hsien, K.-J., Pascua, C., & Wan, M.-W. (2011) · Carbohydrate Polymers · doi:10.1016/j.carbpol.2010.08.013 · Cited by 388
Metadata
- Authors
- Jin, L., & Bai, R.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-10-30
- Volume
- 18
- Issue
- 25
- Pages
- 9765-9770
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W177221433
- Cited by
- 629
- References
- 0
- FWCI
- 11.10
- Type
- journal article
- Language
- en
- Open access
- closed
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