REMOVAL OF ARSENIC FROM WATER BY IRON-ARSENIC PRECIPITATION THROUGH FILTRATION AT BASIC pH

04 Feb.,2024

 

Presence of iron present in the water helps in the removal of arsenic using ferric chloride as a coagulant. Heavily arsenic-contaminated drinking water can be found in eastern part of India and Hungary. The purpose is to make a model to remove the arsenic content of the water using the iron present in the water. For our model experiment we used three types of water deionized water, mineral water and tap water. We used the arsenic standard solution to make arsenic contaminated water. My work experience in laboratory in the removal of arsenic demonstrates that the different artificially contaminated water matrix dictates the selection of the arsenic-removal process. The removal of arsenic by ferric hydroxide which was formed in situ from ferric chloride as a coagulant achieved a residual average arsenic concentration of less than 10 μg/L by coagulation technology through adjustment of pH and control of coagulant dose. The residual arsenic concentrations measured after the treatment of the samples using this technique were well below the 10 μg/L level. We found out that amounts of iron present in the water helps in the removal of arsenic.

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