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Zinc Sulphate Heptahydrate
Main application: used in the manufacture of lithopone, and used as a mordant, astringent, wood preservatives, etc.
Waste disposal method: the amount of hours, dissolve in water or proper acid solution, or with appropriate antioxidant
transform it into a water solution. With sulfide precipitation, regulate the PH value to 7 complete precipitation. Strain
the solid sulfur recycle or landfill disposal. With sodium hypochlorite and excessive sulfide, and then into a drain.