Wastewater Removal Of Copper Nickel Ion Exchange Resin

Wastewater removal of copper nickel ion exchange resin.

Electroplating waste water is usually caused by the following reasons:

(1) plating part of the washing water;

(2) waste plating solution;

(3) Clean the workshop floor, cleaning board cleaning water, condensate water in the fume hood and other tanks and plating tank leakage or improper operation control caused by waste water;

(4) Cooling water of the equipment.

(5) Metal surface treatment: metal surface treatment mainly includes surface cleaning, electroplating, passivation film protection, mechanical treatment and coating coverage.

The Cohesis ion exchange method primarily uses methods to purify wastewater by exchanging ions from an ion exchange resin with some ions in electroplating wastewater to remove the ions.

The use of ion exchange technology in the domestic treatment of electroplating wastewater began in the 1960s, by the end of the 1970s, the urgent need to solve the problem of environmental pollution led to the development of this technology, and is now one of the effective methods for the treatment of electroplating wastewater and the recovery of some metals, but also to make electroplating wastewater become an important part of the closed loop. However, the investment cost of ion exchange is very high, the system design and operation management are complex, small enterprises are difficult to adapt, the maintenance and management are poor, and the expected effect is not achieved.

At present, the domestic electroplating wastewater containing chromium and nickel has been treated by ion exchange, and has relatively mature experience in design, operation and management. After treatment, the water meets the discharge standard, the effluent quality is good, and it can be recycled in general. The regenerated eluent after resin exchange adsorption saturation can be adjusted and purified by electroplating process, and then reused in the plating tank to basically achieve a closed loop. In addition, the ion exchange method can also be used to treat wastewater containing copper, zinc and gold.

Traditional precipitation method can not meet the increasing environmental requirements (such as electroplating table 3 nickel content requirements of 0.1mg/l or less). According to the characteristics of specific heavy metal ions, the recovery and deep removal of heavy metal ions can be realized by using the special functional groups of chelating resin to form complexes with heavy metal ions.