TREATMENT FOR WASTE WATER CONTAINING MERCURY

PURPOSE:To remove the mercury in mercury-contg. waste water efficiently by adding soluble sulfides and/or soluble org. sulfur compds. to said waste water then oxidizing separated liquid and bringing the same into contact selective mercury adsorbents. CONSTITUTION:After the pH of mercury-contg. waste...

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Bibliographic Details
Main Authors TAKATOMI HIROSHI, TOKUDA SHINGO, YAMAUCHI SHINJI, ITAYA KENJI
Format Patent
LanguageEnglish
Published 23.03.1983
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PURPOSE:To remove the mercury in mercury-contg. waste water efficiently by adding soluble sulfides and/or soluble org. sulfur compds. to said waste water then oxidizing separated liquid and bringing the same into contact selective mercury adsorbents. CONSTITUTION:After the pH of mercury-contg. waste water is controlled to 7-11, soluble sulfides and hydrosulfides such as sodium, potassium and ammonia or soluble org. sulfur compds. are added thereto and the precipitate of mercury sulfide, etc. is separated. There are trithiocyanuric acid or their deriv., etc. as the above-described soluble org. sulfur compds. Thereafter, soluble iron salts such as ferrous chloride, ferric chloride or ferric sulfate, etc. are added to the separated liquid and the pH is controlled to 6-11 to form flocks of iron hydroxide, etc. and to codeposit the excessive components of alkali sulfides, etc. and the HgS ions, etc. formed in this time as iron sulfide together with the flocks.
Bibliography:Application Number: JP19810146903