Activated red mud as a permeable reactive barrier material for fluoride removal from groundwater: parameter optimisation and physico-chemical characterisation
| Autor: | Shishir Kumar Behera, Kannan Pakshirajan, Ayi Vinati, Eldon R. Rene |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0208 environmental biotechnology
02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification chemistry.chemical_compound Fluorides Adsorption parasitic diseases Spectroscopy Fourier Transform Infrared Environmental Chemistry Waste Management and Disposal Groundwater 0105 earth and related environmental sciences Water Science and Technology Chemistry General Medicine Hydrogen-Ion Concentration Red mud 020801 environmental engineering Kinetics Chemical engineering Permeable reactive barrier Fluoride Water Pollutants Chemical |
| Zdroj: | Environmental technology. 41(25) |
| ISSN: | 1479-487X |
| Popis: | The main aim of this work is to test the performance of red mud as a permeable reactive barrier (PRB) material for fluoride removal from water. Batch experiments were carried out to optimise the fluoride removal efficiency (RE) of activated red mud (ARM) based on four selected parameters, namely, the initial fluoride concentration (3-40 mg/L), adsorbent dose (0.5-5 g/L), pH (3.0-11.0) and ionic strength (0.001-0.5 M). Statistical analysis of the results revealed the optimum conditions as initial fluoride concentration -21.46 mg/L, adsorbent dose -2.77 g/L, pH 7.01 and ionic strength -0.24 M, respectively. Under the optimum conditions, fluoride RE of 87.3% was achieved. The individual effects due to initial fluoride concentration, adsorbent dose and ionic strength on fluoride removal were highly significant ( |
| Databáze: | OpenAIRE |
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