Abstract
It introduces a kind of technique method that recycling cyanide zinc plating waste liquid in the laboratory, involving the fields in electroplating and comprehensive utilization of waste liquid. The process includes the following steps: first remove impurities in the waste liquid, and then add hydrochloric acid to adjust PH value. Using cation-anion and resin, through ion exchange method, remove disturbing ion Cu2+, Cr2O72- in the cyanide zinc plating waste liquid, thus cyanide zinc plating solution can be recycled. Using sodium hydroxide solution to make resin reproduced, and then add NaHSO3, NaOH solid to precipitate Cu2+ and Cr6+ in it, and do incineration treatment. This invention provides an easy and effective method of recycling cyanide zinc plating waste liquid in the laboratory, which improves the utilization of resources, and reduces pollution.
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