Fluorine insolubilizer , treatment method of reducing the elution of the gypsum -containing fluorine and fluorine contaminated soil

摘要

I be reduced to 0.8mg / L or less of the soil environmental standards as a rule of thumb the elution amount of fluorine from the soil or the like that is contaminated with fluorine or plaster containing fluorine efficiently and more economically by a simple operation provides a method of treating fluorine contaminated soil using the same and gypsum, fluorine insolubilizers can, reduced the amount of dissolved fluorine-containing by using the same. Iodide things as fluorine insolubilizer activated 0.5 minutes or more in water at 40 ℃ than the mass ratio of the two hydrate water / calcium hydrogen phosphate is more than 25, the calcium hydrogen phosphate dihydrate had.