State-of-the-art of research progress on adsorptive removal of fluoride-contaminated water using biochar-based materials: Practical feasibility through reusability and column transport studiesShow others and affiliations
2022 (English)In: Environmental Research, ISSN 0013-9351, E-ISSN 1096-0953, Vol. 214, article id 114043Article in journal (Refereed) Published
Abstract [en]
Fluoride (F-) is one of the essential elements found in soil and water released from geogenic sources and several anthropogenic activities. Fluoride causes fluorosis, dental and skeletal growth problems, teeth mottling, and neurological damage due to prolonged consumption, affecting millions worldwide. Adsorption is an extensively implemented technique in water and wastewater treatment for fluoride, with significant potential due to efficiency, cost-effectiveness, ease of operation, and reusability. This review highlights the current state of knowledge for fluoride adsorption using biochar-based materials and the limitations of biochar for fluoride-contaminated groundwater and industrial wastewater treatment. Biochar materials have shown significant adsorption capacities for fluoride under the influence of low pH, biochar dose, initial concentration, temperature, and co-existing ions. Modified biochar possesses various functional groups (-OH, -C=C, -C-O, -CONH, -C-OH, X-OH), in which enhanced hydroxyl (-OH) groups onto the surface plays a significant role in fluoride adsorption via electrostatic attraction and ion exchange. Regeneration and reusability of biochar sorbents need to be performed to a greater extent to improve removal efficiency and reusability in field conditions. Furthermore, the present investigation identifies the limitations of biochar materials in treating fluoride-contaminated drinking groundwater and industrial effluents. The fluoride removal using biochar-based materials at an industrial scale for understanding the practical feasibility is yet to be documented. This review work recommend the feasibility of biochar-based materials in column studies for fluoride remediation in the future.
Place, publisher, year, edition, pages
Elsevier BV , 2022. Vol. 214, article id 114043
Keywords [en]
Fluoride, Adsorption, Biochar, Electrostatic interaction, Kinetics, Thermodynamics
National Category
Environmental Sciences Water Treatment
Identifiers
URN: urn:nbn:se:kth:diva-321401DOI: 10.1016/j.envres.2022.114043ISI: 000873349200002PubMedID: 36029838Scopus ID: 2-s2.0-85136639260OAI: oai:DiVA.org:kth-321401DiVA, id: diva2:1711142
Note
QC 20221116
2022-11-162022-11-162022-11-16Bibliographically approved