Commonly used treatment methods for electroplating complex nickel wastewater include chemical precipitation and chelation precipitation.
Chemical precipitation method: Chemical precipitation method is a method of converting dissolved heavy metals in wastewater into water-insoluble heavy metal compounds, including neutralization precipitation method and sulfide precipitation method.
Chelation precipitation method: Add heavy metal capture agents to wastewater containing heavy metals to cause chelation precipitation. The characteristics of this method are that the effluent is stable and up to standard, it has a wide range of applicable conditions, no secondary pollution, low sludge moisture content, easy recovery of sludge, and simple equipment requirements. However, the heavy metal capture agent (ordinary nickel removal agent) is not suitable for complex nickel. To treat wastewater, the network needs to be broken first, and precipitation cannot be directly generated.
HMC-M2 is a high-efficiency nickel removal agent developed by Zhanqing Environmental Protection R&D personnel for difficult nickel-containing wastewater. This agent can form water-insoluble chelate precipitates with any form of nickel ions. The total nickel content in wastewater is treated to less than 0.1mg/L, without breaking the complex and with high efficiency.