... contaminants. Thus, it is often used as waste water treatment chemicals during various water source purification processes. 1. PAC offers ... such as mines, oilfield, metallurgy, coal washing, leather, chemicals, and more. 2. Also, polyaluminium chloride is applicable to ... anti-wrinkle cloth, pharmaceuticals, cosmetics, and more. It allows wastewater to be recycled. 3. In petroleum refining industry, the ...