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https://doi.org/10.5562/cca2283

Adsorption of Arsenic on MgAl Layered Double Hydroxide

Davor Kovačević orcid.org/0000-0001-6446-3459 ; Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
Branka Njegić Džakula ; Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia
Damir Hasenay ; Department of Information Sciences, Faculty of Humanities and Social Sciences, University of Osijek, L. Jägera 9, HR-31000 Osijek, Croatia
Ivan Nemet ; Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
Sanda Rončević ; Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
Imre Dékány ; Department of Physical Chemistry and Materials Sciences, University of Szeged, Aradi vt 1, H-6720 Szeged, Hungary
Dimitris Petridis ; Institute of Materials Science, NCSR “Demokritos”, Agia Paraskevi 15310, Athens, Greece

Sažetak

Groundwater in the Eastern Croatia, as well in the South-eastern Hungary, contains relatively high concentrations of arsenic that can cause chronic toxicity to humans. Therefore, the aim to find an ef-fective composite adsorbent that can be applied for arsenic water remediation by introducing it in the groundwater treatment is very important. The presented results were obtained using layered double hy¬droxide (LDH) as a sorbing system. MgAl LDH samples with a Mg:Al molar ratio of 2:1 were synthe¬sized. Adsorption of arsenic anions from groundwater samples from Eastern Croatia, as well as adsorption of model aquatic arsenic sample solutions, on MgAl layered double hydroxide was investigated. Induc¬tively coupled plasma atomic emission spectrometry (ICP-AES) was used for determination of arsenic concentration after adsorption. It was shown that in both cases the adsorption process could be interpreted in terms of Kroeker adsorption isotherm regardless to the presence of other ions in the groundwater. Addi¬tionally, the influence of phosphate concentration on adsorption of model arsenic samples was examined and it was shown that (at least in examined range of arsenic and phosphate concentration) there is no sig¬nificant influence of phosphate on adsorption of arsenic. (doi: 10.5562/cca2283)

Ključne riječi

arsenic; groundwater; MgAl layered double hydroxide; ICP-AES; Kroeker isotherm

Hrčak ID:

111307

URI

https://hrcak.srce.hr/111307

Datum izdavanja:

20.11.2013.

Posjeta: 3.386 *