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

BAIGORRIA, ESTEFANIA; CANO, L.A.; KARIM SAPAG; ALVAREZ, VERA A.

International Journal of Environment and Health

Inderscience

Año: 2020

1743-4955

Some inorganic species of Arsenic (As) present in drinking waters is highly dangerous for human health. Adsorption technique is considered a promissory technology for the As selective remotion from aqueous systems. Iron (Fe), and iron-containing clays are adsorbents commonly used for arsenic elimination of water due to the strong affinity between Fe and inorganic species of As.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 selected clays werephysico-chemically characterized, and the As adsorption capability was tested in batch experiments at pH = 7. 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.