In the process of electroplating, in order to meet the requirements of product performance and quality, some electroplating solutions are very complex, which brings great difficulties to wastewater treatment and often leads to excessive discharge of wastewater. For example, the electroless nickel plating solution often contains complexing agents such as citric acid and EDTA (ethylenediamine tetraacetic acid), which will form a very stable complex with nickel ions, and the "difficulty coefficient" is very large in the treatment of rinsing wastewater and waste electroless plating solution after electroless nickel plating. The reality shows that it is difficult for electroplating enterprises to treat nickel-containing wastewater to meet the discharge standards in Table 3. For heavy metal ions in wastewater, a chemical precipitation method-heavy metal collector M 1 is provided here, which can generate water-insoluble chelate precipitation with any form of heavy metal ions, and easily reach the standards below Table 3 of Discharge Standard for Electroplating Pollutants (GB2 1900-2008).

Phosphorus-containing wastewater in electroplating wastewater also adopts chemical precipitation method, adding hypophosphite remover, which is suitable for wastewater containing hypophosphite and organophosphorus, mainly produced in chemical nickel plating process and organophosphorus chemical production. The traditional process uses Fenton oxidation technology to oxidize hypophosphite and organophosphorus to orthophosphate, and then carries out precipitation treatment, but the oxidation effect is poor and the phosphorus removal rate is low. Adding hypophosphite remover P3, it can directly combine with hypophosphite and organophosphorus to generate precipitate, and it is not necessary to convert it into orthophosphate for treatment, so the removal effect is good, and the total phosphorus can reach the standard directly.