The Effect of Accompanying Anions on Arsenate Sorption onto Selective Sorbents
| Autor: | Zuzana Asresahegnova, Petra Slapakova, Helena Sousa, Ludek Jelinek, Helena Parschová, Alena Pohorela, Eva Mištová |
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| Rok vydání: | 2014 |
| Předmět: |
Chemistry
Process Chemistry and Technology General Chemical Engineering Composite number Inorganic chemistry Oxide Arsenate chemistry.chemical_element Filtration and Separation Sorption General Chemistry Ion Metal chemistry.chemical_compound visual_art medicine visual_art.visual_art_medium Ferric Arsenic medicine.drug |
| Zdroj: | Separation Science and Technology. 50:81-90 |
| ISSN: | 1520-5754 0149-6395 |
| Popis: | Arsenate sorption onto inorganic and composite inorganic/organic selective sorbents based on ferric oxide/oxohydroxide was tested under varying concentration of accompanying anions (chlorides, sulfates, phosphates, and silicates). Among the studied anions, phosphates showed the strongest influence on arsenic removal. Ferric oxide based sorbents were also compared to weak and strong base anion exchangers and other metal oxide (ceric oxide, zirconium oxide) based composites under the presence of accompanying anions (chlorides and sulfates). Their performance was comparable to ferric oxide composites. Ferric oxide/oxohydroxide based composites are able to take up arsenates (with capacity of tens of mmol·L−1) even at the presence of 100 mg·L−1 of chlorides and sulfates where the breakthrough capacities of weak and strong base anion exchangers dropped to less than 2% (units of mmol·L−1) of the values obtained in the absence of accompanying anions (hundreds of mmol·L−1). |
| Databáze: | OpenAIRE |
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