Development of modified kaolins for the removal of As (III) in waters

BAIGORRIA ESTEFANÍA; CANO LEONARDO ANDRÉS; SAPAG KARIM; ALVAREZ VERA A

International Journal of Environment and Health

Inderscience Enterprises

Año: 2020

1743-4963

Arsenic (As) present in waters is highly dangerous for human health. Adsorption technique is considered a promissory technology for the As selective elimination from aqueous systems. Iron (Fe), and iron-containing clays are adsorbents commonly used for the elimination of arsenic due to their strong affinity to As inorganic species.Kaolinites, from natural and acid-treated kaolinites, impregnated with iron oxides (30 % and 20 % of the Fe (III)) were developed in the present work. The as prepared clays were physico-chemically characterized, and the As adsorption capability was tested. Arsenic removal studies showed 97% effectiveness for the 30% iron sedimented kaolinite at 1 h of treatment, being the most effective developed material. These preliminary results showed that the Fe (III) impregnated kaolinites could be considered as promissory adsorbent materials for As removal from aqueous systems.