METHOD FOR REMOVING ARSENIC IN WATER

摘要

PROBLEM TO BE SOLVED: To efficiently remove a very small amt. of arsenic by bringing hydrotalcite into contact with the water being alkali of excess specific conc. SOLUTION: Hydrotalcite represented by the compsn. formula: Mg6Al2(OH)16 CO3.4H2O or Mg4Al2(OH)12CO3.3H2O is brought into contact with arsenic-contg. alkaline water of >pH 7 by applying a fixed bed circulation method or a powder dispersion method to efficiently remove the arsenic in the water.