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Abstract of the Article

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Introduction of a Green Technology for Removal of Arsenic Species, using zeolites

Authors:
[ R. Menhaje-Bena ] - Department of Pharmacology, School of Medicine, Tehran University of Medical Science^Tehrane, IRAN
[ H. Kazemian ] - Jaber Ibn Hayan Research Laboratory, Atomic Energy Organization of Iran (AEOI)
[ M. Hosseini ] - Department of Pharmacology, School of Medicine, Tehran University of Medical Science^Tehrane, IRAN

Abstract:

Inorganic arsenic is highly toxic to mammals and aquatic species. The U. S. EPA has classified arsenic as a human carcinogen and is considering lowering the maximum allowable contaminant level for drinking water to 10 ppb or less. 1. The purpose of this study was to find a relatively inexpensive method for removal of arsenate and arsenite from drinking water. The capability of Iranian natural clinoptilolites, relevant synthetic zeolites A and P and Iron (IT) modified of them was investigated for the uptake of arsenic anions from water. Data obtained from ion-exchange using batch (static) technique showed that among the investigated zeolites, modified synthetic zeolite P(500-SOOum) was the most selective sorbent for removal of arsenic. In this study the influencing of factors including temperature, concentration, pH, interference and particle size was determined or studied on removal of arsenic species. This green method provides an inexpensive sorbent material to remove aqueous arsenic species from an aqueous medium, which does not need to be reused in order to be economically applicable and the arsenic-laden zeolites will not leach aqueous arsenic species and can be readily disposed of as non-hazardous waste landfill.

Keywords:

Iranian natural clinoptilolite zeolites, arsenic, acid mine drainage(AMD), waste water, green technology,