シアンメトヘモグロビン含有血液検査廃液の処理プロセスの研究

概要

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The treatment of waste solution containing cyanide methemoglobin and cyanide ion, which result from the assay of hemoglobin content in the blood, was investigated in terms of the separation of two cyanide components. The cyanide methemoglobin was separated by means of the flocculation with polymer flocculant. Potassium poly (vinyl alcohol) sulfate (KPVS) flocculates quantitatively cyanide methemoglobin, whereas poly (acrylamide), poly (acrylic acid) and poly (diallyldimethylammonium chloride) are not effective for the flocculation of cyanide methemoglobin. From the results of colloid titrations for human carboxyhemoglobin and for cyanide methemoglobin in the waste solution, the mechanism of the fllocculation was interpreted by the formation of polyion complex between hemoglobin and KPVS, based on the stoichiometric saltlinkage formation of amino, imidazole, and guanidyl groups in the hemoglobin with sulfate groups in KPVS. On the other hand, the cyanide ion in the waste solution of which the cyanide methemoglobin was flocculated and/or separated, can be removed in the usual ways such as the aeration and the alkaline chlorination On the bases of the results mentioned above, two possible processes for the treatment of the waste solution are presented.