Also, you can't break down arsenic to non toxic materials. You would have to remove it if it is a problem. Iron oxides will adsorb arsenic, but it would settle to the bottom and then be released slowly.

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Also, you can't break down arsenic to non toxic materials. You would have to remove it if it is a problem. Iron oxides will adsorb arsenic, but it would settle to the bottom and then be released slowly.