Defluoridation of groundwater using Fe3+-modified bentonite clay: optimization of adsorption conditions

Autor:	Wilson M. Gitari, Vhahangwele Masindi, Jabulani Ray Gumbo, Tholiso Ngulube
Rok vydání:	2013
Předmět:	chemistry.chemical_compound Adsorption Chemistry Bentonite Fluoride adsorption Environmental engineering Cation-exchange capacity Ocean Engineering Pulp and paper industry Pollution Fluoride Groundwater Water Science and Technology
Zdroj:	Desalination and Water Treatment. 53:1578-1590
ISSN:	1944-3986 1944-3994
Popis:	Groundwater is the most appropriate and widely used source of drinking water for many rural communities in Sub-Saharan Africa. Studies reveal that in some of the boreholes, F− concentration may be way beyond the recommended limits for drinking water. This study evaluates the use of raw unprocessed bentonite clay and its Fe3+-modified form for fluoride adsorption. A series of batch adsorption experiments were carried out to evaluate parameters that influence the adsorption process. Loading of Fe3+ on bentonite was achieved by contacting the powdered clay with 80 ppm Fe3+ solution for 15 min at S/L ratio of 2 g/100 ml. The raw unprocessed bentonite clay was observed to increase the pH of the F− solution as opposed to the Fe3+-modified bentonite. Fe3+ bentonite exhibited ≈100% F− removal as opposed to unprocessed bentonite 10, while the unprocessed raw bentonite ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b41aaf29380ffdb6f25bac5e90245501 https://doi.org/10.1080/19443994.2013.855669 Zobrazit plný text záznamu