Tailings wastewater treatment

I. Polyferric sulfate treatment in Inner Mongolia to obtain tailings wastewater from each Qi and lead-zinc mine

Using polymeric flocculants for the treatment of iron sulfate to separate floating mine flying lead and zinc wastewater, wastewater be treated using backwater. The treatment method is to add 0.5 g of Na ₂ S to 500 ml of wastewater, the dosage of polyferric sulfate (PFS-FeS0 ₄ ) is 56 ml/L, and the chromium removal rate is remarkably improved, Cr ²⁺ and Cu ²⁺ , Pb ²⁺ , Zn ^{2+ .} The turbidity removal rates were 84.96%, 99.97%, 98.90%, and 99.14%, respectively. The residual concentrations of Cu ⁺ , Pb ⁺ and Cr ⁺ were 0.098 mg/L, 0.001 Omg/L and 0.42 mg/L, respectively. The residual turbidity is 1.2 NTU, and the treated wastewater is colorless and odorless and can be recycled.

Second, Fe ₂ (S0 ₄ ) - gluten-polysaccharide coagulant flocculated kaolin suspension

At pH 7 and temperature 30 °C, the kaolin suspension was flocculated with Fe ₂ (S0 ₄ ) ₃ - gluten. After adding flocculant for 5 min, the flocculation effect was the best, which was better than using Fe ₂ (S0 ₄ ) alone. ₃ or gluten, which is also superior to Fe ₂ (S0 ₄ ) ₃ and polyacrylamide.

3. Using 2-hydroxy-5-mercaptobenzaldehyde oxime as a collector for Cu ^{2+ in} flotation wastewater

It is said that 100% of the copper ions in the wastewater can be removed. The structural formula of 2-hydroxy-5-mercaptobenzaldehyde oxime is as follows: