Enhanced arsenic removal using lateritic bauxite modified by heating and blending
| Autor: | Emmanuella Anang, Meshack Tei, Victor Kwabena Aduboffour |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Water Science and Technology, Vol 85, Iss 5, Pp 1568-1580 (2022) |
| Druh dokumentu: | article |
| ISSN: | 0273-1223 1996-9732 |
| DOI: | 10.2166/wst.2022.055 |
| Popis: | The use of bauxite to remove arsenic from wastewater has been confirmed to be effective, but its removal efficiency in literature is not up to 90%, hence the need to devise a more effective method to remove arsenic from wastewater. In this study, a novel material was prepared by thermally modifying and blending yellow and red lateritic bauxite to form thermally modified and blended yellow and red lateritic bauxite (TYB + TRB). The adsorption isotherm, morphology and chemical composition of the novel material were determined by the Langmuir and Freundlich models, Scanning Electron Microscopy (SEM) and X-ray Fluorescence (XRF), respectively. Application of the novel material in arsenic removal resulted in >97% removal efficiency within 60 min. The arsenic adsorption by TYB + TRB conformed to the Freundlich model. The SEM image depicted a compacted earth material after use of the TYB + TRB to remove arsenic from the wastewater. The XRF results also showed a drastic reduction in the chemical composition of the novel bauxite except Ti, thus suggesting the occurrence of multiple mechanisms during the arsenic removal. This study demonstrated the potential of TYB + TRB to be developed and used as the most suitable material for wastewater treatment. HIGHLIGHTS TYB + TRB was prepared to superimpose the arsenic removal performance of bauxite.; The removal efficiency of arsenic by TYB + TRB was >97%.; The mode of adsorption is explained by the Freundlich model.; The chemical composition of the TYB + TRB reduced drastically after arsenic removal except Ti.; The novel material is a promising material for highly effective arsenic removal.; |
| Databáze: | Directory of Open Access Journals |
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