Development of the zeolite-sorption process for electroplating wastewater treatment

Regularities of the sorption of heavy metal ions on the natural zeolite (calcium heulandite) have been investigated. Relationships of the sorption of heavy metal ions as a function of the fraction size of test zeolites were obtained. The sorption values in static conditions for nickel, copper and zinc ions amounted to 5.9, 4.8 and 2.7 mg/g, respectively, making it possible to use zeolites as sorbents in the treatment of wastewater from electroplating facilities. The degree of wastewater purification in a filter with calcium heulandite medium amounted to similar to 90%.