STUDY ON THE ADSORPTION OF ASENIC IN GROUND WATER BY THE MODIFIED OF TAY NGUYEN RED MUD

Abstract

Arsenic (As) is considered among the most significant and dangerous
pollutant and is classified as human carcinogen. In the world and Viet Nam, there
were many studies on the materials for arsenic removal from aqueous solution,
such as material based on the iron, aluminum hydroxide or oxide, clay and other
natural minerals. The analysis of number of the red mud samples in Tan Rai (Tay
Nguyen) Alumina Refinery showed that it contains a large portion of iron in the
form of hematite, goethite, boehmite, and residual aluminate and small portion
of quartz, titania, and trace quantity of other element. This brief review revealed
that Tan Rai red mud has the composition as a potential material for arsenic
removal from aqueous solution. The study considered to wash out original red
mud and then thermally treat at different temperature for different times to
form adsorptive materials. The washing material (signed as RMW) treated at
350oC for 2h had that of 99.75% arsenic in the water solution. The material can
be applied in arsenic removal in ground water