Effect of inorganic and organic ligands on the sorption/desorption of arsenate on/from Al–Mg and Fe–Mg layered double hydroxides
Abstract
This paper describes the sorption of arsenate on Al-Mg and Fe-Mg layered double hydroxides as affected by pH and varying concentrations of inorganic and organic ligands, and the effect of residence time on the desorption of arsenate by ligands. The capacity of ligands to inhibit the fixation of arsenate followed the sequence: nitrate<nitrite<sulphate<selenite<tartrate<oxalate≪phosphate on Al-Mg-LDH and nitrate<sulphate≈nitrite<tartrate<oxalate<selenite≪ phosphate on Fe-Mg-LDH. The inhibition of arsenate sorption increased by increasing the initial ligand concentration and was greater on Al-Mg-LDH than on Fe-Mg-LDH. The longer the arsenate residence time on the LDH surfaces the less effective the competing ligands were in desorbing arsenate from sorbents. A greater percentage of arsenate was removed by phosphate from Al-Mg-LDH than from Fe-Mg-LDH, due to the higher affinity of arsenate for iron than aluminum.
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Fe-Mg-LDH sorbent was able to hold a much higher amount of arsenate than arsenite, and the sorption of arsenate was much more pH-dependent than that of arsenite.
“They also observed that Fe-Mg-LDH sorbent was able to hold a much higher amount of arsenate than arsenite and noted that the sorption of the former was much more pHdependent than the latter.”
From Chemical Processes Affecting the Mobility of Heavy Metals and Metalloids in Soil Environments (2016) · cites this paper as [26]
Cites
Violante, A., Gaudio, S. D., Pigna, M., Ricciardella, M., & Banerjee, D. (2007) · Environmental Science & Technology · doi:10.1021/es070382+ · Cited by 131 · see citing works
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Chemical Processes Affecting the Mobility of Heavy Metals and Metalloids in Soil Environments
Caporale, A. G., & Violante, A. (2016) · Current Pollution Reports · doi:10.1007/s40726-015-0024-y · Cited by 369 · see citing works
Self-citationElucidating Mechanisms of Competitive Sorption at the Mineral/Water Interface
Violante, A. (2013) · Advances in Agronomy · doi:10.1016/b978-0-12-405942-9.00003-7 · Cited by 80 · see citing works
Self-citationSommella, A., Caporale, A. G., Denecke, M. A., Mangold, S., Pigna, M., Santoro, A., Terzano, R., & Violante, A. (2015) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2015.07.046 · Cited by 36 · see citing works
Self-citationHeredia, A., Gómez Avila, J., Vinuesa, A., Saux, C., Mendoza, S. M., Garay, F., & Crivello, M. (2019) · Adsorption · doi:10.1007/s10450-019-00109-2 · Cited by 18 · see citing works
- Authors
- Caporale, A. G., Pigna, M., Dynes, J. J., Cozzolino, V., Zhu, J., & Violante, A.
- Affiliations
- University of Naples Federico II (IT)
- University of Saskatchewan (CA)
- Corresponding author
- Violante, A.
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2011-12
- Volume
- 198
- Pages
- 291-298
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2035138485
- Cited by
- 61
- References
- 1
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 3 · 2023: 2 · 2022: 5 · 2021: 3 · 2020: 5 · 2019: 3 · 2018: 5 · 2017: 5 · 2016: 4 · 2015: 12 · 2013: 6 · 2012: 2
- FWCI
- 2.20
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Arsenic contamination and mitigation
- Physical Sciences › Materials Science › Materials Chemistry › Layered Double Hydroxides Synthesis and Applications
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Keywords
- arsenate adsorption, layered double hydroxides, phosphate, nitrate, nitrite, sulfate, selenite, tartrate, oxalate, residence time, pH effect, arsenic removal
- MeSH terms
- Arsenates, Hydroxides, Inorganic Chemicals, Ligands, Metals, Organic Chemicals, X-Ray Diffraction, Spectroscopy, Fourier Transform Infrared
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