Keywords: arsenic removal, drinking water, fly-ash bed
Removal of arsenic from drinking water using modified fly-ash bed
The removal of arsenic from drinking water by filtration through modified fly-ash bed is discussed. The preparation and characteristics of the bed material and the effects of different parameters like pH and the presence of other constituents are described. Various arsenic compounds in synthetic mixtures as well as drinking water samples containing arsenic have been investigated. The effectiveness of the modified fly-ash bed for the control of arsenic has been demonstrated by taking different quantities of arsenic(III) and arsenic(V) salts. The results of filtering through fly-ash bed were found to be satisfactory which makes it a low cost treatment method for the removal of arsenic, improving the quality of drinking water. The utilisation of the bed material after use is also discussed.