Cohesion constituent null for the clean water in order to remove the heavy metal and trihalomethane and that precursive material

摘要

This invention relates to a flocculent composition which so functions as an effective flocculant for flocculating and removing floating matter and detrimental metals when added to industrial wastes, sewage, raw water of service water, etc., removes effectively THMs and their precursors, and serves as a water purification agent. The present invention provides a novel flocculant composition which contains water-soluble aluminum salts, water-soluble iron salts and water-soluble magnesium salts in the proportions of Al, Fe, and Mg of 1, 0.01 to 2, and 0.01 to 2, respectively, in terms of atomic weight, and the sum of their oxides, Al2O3, Fe2O3, and MgO, amounts to 1 to 15 wt%.