... Polyaluminium Chloride :1) Purification of river water, lake water and underground water,industry water and industry recycling water.2) Reclaiming coal from coal-washing ... , mine, pharmacy, paper-making, and purification of the waste water containing fluorine, oil and heavy metals4) Tannage and cloth cockling ... 0.5 1.01.5PH(1% water solution ) 3.5-5.0(SO42-)%≤ 9.8Anmoniacal(N)%≤0.03 0.060.09Arsenic(As ...