Overview of hypophosphorous nickel wastewater
Hypophosphorous nickel wastewater, also known as chemical nickel phosphorus alloy wastewater, generally refers to the cleaning wastewater of parts during chemical nickel plating, hypophosphorous nickel wastewater Wastewater, as the name suggests, contains a large amount of hypophosphite ions and nickel ions, of which nickel ions exist in the form of complex nickel. The presence of complex nickel can prevent nickel ions from combining with hypophosphite to form precipitation, thus affecting electroless nickel plating. Effect, common complexing agents such as citric acid, tartaric acid, malic acid, etc. Hypophosphite comes from sodium hypophosphite. Sodium hypophosphite is added to the electroless plating solution to provide the electrons needed for the reduction of nickel ions into nickel metal. The difficulty in treating hypophosphorus nickel wastewater lies in nickel and phosphorus. Complex nickel can be treated with high-efficiency nickel removers, but hypophosphorus cannot be treated with common phosphorus removal agents and needs to be treated with hypophosphorus remover HMC- P3 is processed.
Principle of Hypophosphite Remover
According to the characteristics of hypophosphite, the solubility of hypophosphite is relatively high. Under normal conditions, it is difficult for hypophosphorus to directly interact with heavy metals. Precipitation, and the idea of ??oxidizing hypophosphite to orthophosphate through the principle of oxidation technology cannot be used because Fenton oxidation efficiency is limited and can only oxidize a part of hypophosphite. The wastewater still contains a large amount of hypophosphite ions that cannot be removed. .
Zhanqing’s environmentally friendly hypophosphorus remover HMC-P3 is a multi-phase inorganic composite salt, which is composed of a variety of inorganic salts. It is designed to remove hypophosphorus from electroplating wastewater. The agent can be directly combined with it to form a precipitate, and the hypophosphorus can be removed through PAC coagulation and PAM flocculation.
Phosphorus removal steps for nickel hypophosphorous wastewater
Nickel hypophosphorous wastewater is nickel-containing wastewater and must be treated separately until the nickel reaches the standard before it can be discharged into the comprehensive pool. Therefore, it is often necessary to remove phosphorus when removing phosphorus. Choose to remove phosphorus when removing nickel from nickel-containing wastewater pools. According to the principle of hypophosphorus remover, for nickel hypophosphorus wastewater, phosphorus is removed first, and then nickel is removed. The specific steps are as follows:
1. Take the nickel hypophosphite wastewater and adjust the pH of the wastewater
2. Add the hypophosphite remover and catalyst for reaction
3. Add Hypophosphite flocculant performs flocculation and sedimentation
4. Determine the phosphorus content of the effluent, and the phosphorus can reach the standard
Dosage and effect of nickel hypophosphorus wastewater
Use Hypophosphite remover can treat hypophosphorus nickel cleaning wastewater, and can directly treat phosphorus to meet the national Table III standards; at the same time, using hypophosphite remover can also treat the bath liquid of hypophosphorus nickel, for hypophosphorus with high phosphorus content Both nickel wastewater and hypophosphorus removers can treat hypophosphorus to very low concentrations. Please go to/hope to adopt the orthophosphorus and hypophosphorus removal agents for wastewater.