Oxidation of sulphides in tannery wastewater by use of manganese [IV] oxide
作者： K. Beleska , Valeika , V. Valeikiene
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摘要: Oneofthemethodsofdetoxificationofsulphidesinwastewater� (WW)� oftanneriescouldbetheir� oxidationbyuseofMnO 2 . this material, as well the product of chemical reaction between sulphides andthismaterialisnotleftinWWanddoesnotpolluteit. TheamountofsulphidesandthepHofsolutionhaveaninfluenceonoxidationprocessduration;�it� islongerwhenthesulphideamountandpHintheWWishigher.�Optimaltemperatureofthetreatmentis� 30°c. oxidation goes faster if size Mno 2�� particlesdoesnotexceed�0.1�mm. ThepossibilitiesofrepeateduseofMnO �wereinvestigated.�ThestableefficiencyoftheMnO �couldbe� obtained by putting at first 0.5% 2� and additionally 0.05% �ofthesolutionmassforevery� followingcycleofthetreatment.
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