Method for measuring cadmium content in waste nickel-cadmium battery

A technology of nickel-cadmium battery and determination method, which is applied in the preparation of test samples, measurement of color/spectral characteristics, material analysis through observation of the influence of chemical indicators, etc., can solve difficulties, interference of accurate determination of cadmium, has not been found and other problems to achieve high precision, accurate results, and small errors
CN102590122AActive Publication Date: 2012-07-18GUANGDONG BRUNP RECYCLING TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGDONG BRUNP RECYCLING TECH
Publication Date
2012-07-18

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Abstract

The invention relates to a method for measuring the cadmium content in a waste nickel-cadmium battery, which comprises the steps of aqua regia solution sampling, iron and nickel removing, cadmium and cobalt amount measurement by a back titration method, cobalt content measurement by a conventional method, and the like, and finally the cadmium content is calculated by subtraction. The method has small error, accurate result and high precision, makes up the gap of measuring cadmium in the waste nickel-cadmium battery, and has an important meaning for healthily developing the waste nickel-cadmium battery recycling industry.
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Description

technical field

[0001] The invention relates to a method for measuring cadmium content in waste nickel-cadmium batteries. Background technique

[0002] Waste nickel-cadmium batteries contain heavy metal cadmium, which is more harmful to the environment and human health than other batteries. As early as February 2003, the European Commission promulgated the "Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment" (RoHs Directive), stipulating that the content of cadmium should not exceed 100ppm. Therefore, the recycling of waste nickel-cadmium batteries has been highly concerned by the state and all walks of life.

[0003] At present, although the state has formulated some policies and management methods related to the recycling of used batteries, the relevant national standard documents and implementation methods have not been established. Waste nickel-cadmium batteries are high-hazardous wastes, and the determination...

Claims

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