METHOD FOR TREATING CYANIDE WASTE LIQUID

METHOD FOR TREATING CYANIDE WASTE LIQUID

A highly reliable detoxifying method of the cyano matters is provided. The waste-liquor (1), which contains at least one of free cyano matters, a cyano complex and a reducing compound exhibiting volatility in alkaline aqueous solution, is heated under an alkaline condition to a temperature range, wh...

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Hauptverfasser: TOTSUKA, TOSHIKO, YASHIRO, KUNIJI, KOJIMA, RYUJI, NAKAMURA, HUMIHIDE, YONEYAMA, YOSHIYASU
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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creator TOTSUKA, TOSHIKO
YASHIRO, KUNIJI
KOJIMA, RYUJI
NAKAMURA, HUMIHIDE
YONEYAMA, YOSHIYASU
description A highly reliable detoxifying method of the cyano matters is provided. The waste-liquor (1), which contains at least one of free cyano matters, a cyano complex and a reducing compound exhibiting volatility in alkaline aqueous solution, is heated under an alkaline condition to a temperature range, which lies within a range of from room temperature to boiling point, and which includes a high temperature range of 80 DEG C or more, followed by holding the temperature (7); oxidation-reduction potential of the waste liquor is measured from the room temperature; and, hypochlorite (2) is intermittently or continuously added to the waste liquor from the room temperature, until the oxidation-reduction of the the hypochlorite is detected.
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subjects CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
title METHOD FOR TREATING CYANIDE WASTE LIQUID
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