Electroplating wastewater has a certain degree of complexity. During the electroplating production process, some phosphorus containing wastewater is generated, and the content and types of phosphorus in the wastewater are different. The phosphorus in the wastewater generated by electroplating factories mainly comes from the reducing agent sodium hypophosphate used in chemical nickel plating. The hypophosphate ions are not easy to precipitate and cannot be decomposed by microorganisms, and cannot be easily removed in the wastewater. The excessive amount of hypophosphate has a significant impact on the water quality of enterprises.
In the electroplating process, chemical nickel plating is mainly used, which is more common in plastic electroplating of copper nickel chromium, hardware acidic chemical nickel plating, and circuit board chemical nickel gold plating. Sodium hypophosphate is an ideal reducing agent for electroplating processes, which provides the electrons needed to reduce nickel ions, allowing nickel metal to deposit on metal or non-metal surfaces to form nickel containing coatings. After washing, components generate cleaning wastewater, which contains hypophosphite ions and numerous complex metal ions.
Phosphorus removal agents for electroplating wastewater are rich in special functional groups that can bind with phosphate ions, forming hydrophobic flocculent precipitates, thereby achieving the goal of removing phosphorus from water. In addition, this product has mechanisms such as adsorption, bridging, coagulation, co precipitation, net capture, displacement, ion exchange, etc. It has obvious advantages in enhancing the removal of heavy metal ions, COD, ammonia nitrogen, chromaticity, suspended solids, etc. It can ensure that all indicators meet the national emission standards stably. Due to its low treatment cost, excellent treatment effect, and easy operation, it has been widely used in industrial wastewater, suitable for the treatment of wastewater from circuit boards, electroplating, and other industries.