Method for recycling waste liquor of zinc plating using potassium salt in laboratory

Abstract

The invention discloses a method for recycling waste liquor of zinc plating using potassium salt in a laboratory and relates to the field of comprehensive utilization of waste liquor in the field of plating. The method comprises the following steps of: adding hydrogen peroxide and activated carbon into the waste liquor to remove organic impurities from the waste liquor; then reducing the temperature of the solution by using a refrigeration sheet, and filtering out solid in the solution; adding NaOH solid and NaHSO3 into the solution; precipitating heavy metal elements in the solution out through chemical reaction; and finally distilling to obtain distilled water. By the method, recoverable substances, such as distilled water, boric acid and the like in the waste liquor can be recycled, and unrecoverable substances, such as heavy metal ions (Cu<2+> and Cr<3+>) are subjected to innocent treatment by a deep burying method. The invention provides a simple and practical method, by which resources can be effectively recycled and pollution can be reduced, for treating the waste liquor of zinc plating using potassium salt in the laboratory.

Description

technical field [0001] The invention relates to a method for recycling laboratory potassium salt galvanizing waste liquid, and mainly discusses the function and operation method of the method. Background technique [0002] Now environmental problems are becoming more and more prominent, pollution is becoming more and more serious, and the harm of heavy metal ions is particularly serious, which must be paid attention to. Cu was added to the laboratory potash salt galvanizing process experiment 2+ and Cr 6+ Interfering ions cannot be recycled. However, it contains heavy metal ions, which will pollute the environment if discharged directly. However, there is no sewage treatment station for centralized treatment of waste liquid containing heavy metal ions in the school. Moreover, the amount of waste liquid in the laboratory is not very large, and it is generally discharged directly into the sewer, but this will also pollute the soil, animals, etc., and waste some of the reus...

AI Technical Summary

Problems solved by technology

Cu was added to the laboratory potash salt galvanizing process experiment 2+ and Cr 6+ Interfering ions, cannot be recycled

However, it contains heavy metal ions, which will pollute the environment if discharged directly

However, there is no sewage treatment station for centralized treatment of waste liquid containing heavy metal ions in the school

Moreover, the amount of waste liquid in the laboratory is not very large, and it is generally discharged directly into the sewer, but this will also pollute the soil, animals, etc., and waste some of the reusable resources.