WATER PURIFYING AGENT AND WATER PURIFICATION METHOD

PROBLEM TO BE SOLVED: To provide a water purifying agent and a water purification method capable of contributing to a plant growth without adversely affecting environment, and treating polluted matters or other impurities in water to be treated efficiently, usefully and inexpensively irrespective of organic or inorganic water to be treated. SOLUTION: The water purifying agent is employed which contains polyferric sulfate and sulfuric acid, and further containing magnesium oxide, or magnesium oxide and calcium hydroxide. The water purification methods are also employed which comprises adding the water purifying agent to clean water or waste water, and comprising adding polyferric sulfate and sulfuric acid, and further adding magnesium oxide, or magnesium oxide and calcium hydroxide to clean water or waste water. COPYRIGHT: (C)2007,JPO&INPIT