| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water cleaning agent by which arsenic in a drainage is easily reduced.SOLUTION: A water cleaning agent: is used for a drainage containing arsenic; has a solid state; and includes aluminum sulfate powders having a particle diameter of more than 150μm and 250μm or less and sodium carbonate powders having a particle diameter of more than 75μm and 600μm or less. The particle diameter of the sodium carbonate powders is preferably 250μm or less. The content of the sodium carbonate powders to the total amount of the aluminum sulfate powders and the sodium carbonate powders in the water cleaning agent is preferably 30-50 mass%.</p> |
