Water defluoridation by Fe (III)-loaded sisal fibre: Understanding the influence of the preparation pathways on biosorbents’ defluoridation properties
| dc.contributor.author | Mwakabona, Hezron | |
| dc.contributor.author | Mlay, Hilda | |
| dc.contributor.author | Van der Bruggen, Bart | |
| dc.contributor.author | Njau, Karoli | |
| dc.date.accessioned | 2023-10-04T09:30:30Z | |
| dc.date.available | 2023-10-04T09:30:30Z | |
| dc.date.issued | 2019-01-15 | |
| dc.description | SDG 6: Clean Water and Sanitation, SDG 3: Good Health and Well-being, SDG 12: Responsible Consumption and Production. | en_US |
| dc.description.abstract | Defluoridation properties of two Fe(III)-loaded plant biomass (Fe(III)-activated sisal fibre (Fe(III)-ASF) and post-alkalized Fe(III)-ASF (PA-Fe(III)-ASF)) distinguished by preparation pathways through exclusion/inclusion of post-alkalization are presented, with the aim of understanding the influence of post-alkalization in the preparation pathway to their fluoride removal properties. Findings reveal that PA-Fe(III)-ASF shows higher chemical stability with removal efficiency increasing towards acidic conditions, whereas Fe(III)-ASF manifests a lower chemical stability with removal efficiency increasing (in a wider pH range) with the increase in pH. This is attributable to the nature of the interactions between Fe(III) and the biomass surface functional groups. The removal efficiency by PA-Fe(III)-ASF has a strong positive correlation (0.98) to the surface charge/speciation induced by pH and the reverse is true for the Fe(III)-ASF. These findings therefore suggest that the principal fluoride removal mechanism is electrostatic interactions and ligand exchange for PA-Fe(III)-ASF and Fe(III)-ASF, respectively. Therefore, inclusion/exclusion of post-alkalization in preparation steps is an important aspect to consider in the production of Fe(III)-loaded biosorbents for water defluoridation for acquisition of specific defluoridation properties. | en_US |
| dc.identifier.uri | https://doi.org/10.1016/j.jhazmat.2018.08.088 | |
| dc.identifier.uri | https://dspace.nm-aist.ac.tz/handle/20.500.12479/2104 | |
| dc.language.iso | en | en_US |
| dc.publisher | Elsevier | en_US |
| dc.subject | Research Subject Categories::NATURAL SCIENCES | en_US |
| dc.title | Water defluoridation by Fe (III)-loaded sisal fibre: Understanding the influence of the preparation pathways on biosorbents’ defluoridation properties | en_US |
| dc.type | Article | en_US |