Wastewater from electroplating processes contains large amounts of toxic heavy metals such as hexavalent chromium, nickel, copper, and zinc. Efficient removal of these pollutants is critical to meet increasingly strict discharge standards.
Polyferric sulfate (PFS), a high-efficiency, non-toxic coagulant, has proven to be a reliable solution in numerous real-world wastewater treatment projects.
Unlike PAC or ferrous sulfate, PFS performs well even under acidic conditions. It works efficiently without requiring significant pH adjustment, making it especially suitable for the naturally low pH of electroplating wastewater.
In actual case studies, PFS achieved a removal rate of over 96% for Cr⁶⁺, while PAC typically removed about 75% and ferrous sulfate around 60%. For other heavy metals like nickel and copper, PFS also consistently removed more than 90%, outperforming most traditional coagulants.
In addition, PFS produces compact and fast-settling flocs, leading to clearer effluent and reduced turbidity. In contrast, PAC and ferrous sulfate often leave residual suspended solids, requiring further clarification or filtration.
Compared to commonly used coagulants in the market, PFS offers distinct benefits:
-Wider pH adaptability: Remains highly effective in low-pH conditions common to electroplating wastewater.
-Superior heavy metal removal: Particularly effective for removing Cr⁶⁺, Ni²⁺, Cu²⁺, and Zn²⁺.
-Cleaner effluent: Clearer water output with minimal residuals and suspended solids.
-Simplified operation: No need for extensive pH adjustment or chemical neutralization.
-Eco-friendly and safe: Aluminum-free, non-corrosive, and generates less sludge.
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For industrial clients under pressure to meet discharge compliance standards, polyferric sulfate offers a smart and dependable choice.
It combines superior performance, ease of use, and cost-efficiency, making it ideal for electroplating wastewater or any process with heavy metal contaminants.
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