Method for processing solution including heavy metal
AssigneeMurata Manufacturing Co., Ltd.
InventorsAtsuo Senda, Tohru Kasanami, Takuji Nakagawa
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Abstract
A method for processing a waste solution used in a chemical plating process and including a heavy metal complex salt, a reducing agent, and a pH adjusting agent. The heavy metal complex salt is decomposed into a heavy metal component and a complexing agent component by applying ultrasonic vibration to the waste solution. The heavy metal component obtained by decomposition is in a powder state. Then the waste solution is filtered, so that the heavy metal component may be separated from the complexing agent component.
Claims10
A method of processing a plating solution containing a reducing agent, and at least one copper or nickel heavy metal salt or complex, comprising the steps of
- adding heavy metal powder to said solution and applying ultrasonic vibration to said solution.
A method of processing a plating solution containing a reducing agent, and a copper salt or complex, comprising the step of:
- applying ultrasonic vibration to said solution.
Dependencies are inferred from the claim text.