| dc.creator |
Mwakabona, Hezron Timothy |
|
| dc.creator |
Mlay, Hilda R. |
|
| dc.creator |
der Bruggen, Bart Van |
|
| dc.creator |
Njau, Karoli N. |
|
| dc.date |
2019-07-03T10:15:23Z |
|
| dc.date |
2019-07-03T10:15:23Z |
|
| dc.date |
2019-01-19 |
|
| dc.date.accessioned |
2022-10-25T09:24:47Z |
|
| dc.date.available |
2022-10-25T09:24:47Z |
|
| dc.identifier |
https://doi.org/10.1016/j.jhazmat.2018.08.088 |
|
| dc.identifier |
http://dspace.nm-aist.ac.tz/handle/123456789/333 |
|
| dc.identifier.uri |
http://hdl.handle.net/123456789/95772 |
|
| dc.description |
Research Article published by Elsevier Volume 362, 15 January 2019 |
|
| dc.description |
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. |
|
| dc.format |
application/pdf |
|
| dc.language |
en_US |
|
| dc.publisher |
Elsevier |
|
| dc.subject |
Preparation pathways |
|
| dc.subject |
Iron(III)-loaded plant biomass |
|
| dc.subject |
Fluoride removal mechanism |
|
| dc.title |
Water defluoridation by Fe(III)-loaded sisal fibre: Understanding the influence of the preparation pathways on biosorbents’ defluoridation properties |
|
| dc.type |
Article |
|