Removing Iron, Manganese and Ammonium Ions from Water Using Greensand in Fluidized Bed Process
| Autor: | Seyedeh Fatemeh Masoumi Kojidi, Masoumeh Alijani Galangashi, Behrooz Abbasi Souraki, Alireza Pendashteh, Aazam A. Mirroshandel |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Process Chemistry and Technology
Potassium Inorganic chemistry chemistry.chemical_element 02 engineering and technology Manganese 010501 environmental sciences 01 natural sciences law.invention Potassium permanganate chemistry.chemical_compound Adsorption 020401 chemical engineering chemistry law Fluidized bed Ammonium Water treatment 0204 chemical engineering Safety Risk Reliability and Quality Waste Management and Disposal Filtration 0105 earth and related environmental sciences Biotechnology |
| Zdroj: | Journal of Water Process Engineering. 39:101714 |
| ISSN: | 2214-7144 |
| DOI: | 10.1016/j.jwpe.2020.101714 |
| Popis: | Natural minerals are used as sorbent in water treatment processes due to their high exchange and relatively low cost. In this paper, a pilot water treatment was conducted to explore the application of greensand in a fluidized bed column while the iron, manganese and ammonium removal performances of two treatment processes, including greensand filtration and potassium permanganate-greensand filtration were evaluated. The breakthrough curves were investigated to analyze the effect of variables such as bed height and inlet flow on the removal performance in addition to the physical properties of greensand. The results showed that the effect of potassium permanganate on the outlet concentration of the fluidized bed was significant in terms of the breakthrough curves which led to the breakthrough points for iron and manganese. It was found that adding potassium permanganate increased the equilibrium column capacity ( q e q ) from 5.18 mg/g and 2.16 mg/g to 12.70 mg/g and 11.29 mg/g for iron and manganese respectively. So Fe and Mn outlet concentrations reached under the admissible maximum concentration of drinking water. In the experiments without KMnO4, iron removal was found to be caused by reductive dissolution and adsorption while adsorption was the only mechanism for manganese removal. The findings indicated that ammonium removal was minimally influenced by KMnO4 and ion exchange was the main mechanism for ammonium removal. |
| Databáze: | OpenAIRE |
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