【摘要】 应用有关电位-pH平衡图,对内电解法治理污水中硫氰有害物质的反应原理进行热力学分析,结果表明,对pH=9左右、含20ppmCN^-和30ppmHS^-的污水进行处理时,可能发生的主要电化学反应和化学反应为:生成阳极金属的硫化物、含CN^-络离子或络合物;阴极则主要发生氧的去极化过程。同时,不排除生成部分金属氧化物及其水合物的可能性。CN^-和HS^-直接氧化生成CNO^-和SO₄^2-反应的可能性虽然存在,但并不一定是主要反应。更多还原

【Abstract】 A Thermodynamic analysis concerning the reactions in treating polluted water containing harmful HS^- and CN^- ions with an inner-electrolysis method has been made in considerable detail by using potential-pH equilibrium diagrams. The results show that, the main possible chemical and electrochemical reactions in treating polluted water containing 20ppm CN^- and 30ppm HS^-, pH≈9, may be: the formation of sulphides （MS₂, MS） and complexes of cyanide (M[CN]₆⁼⁼, Mx[M（CN）₆]y) as well as oxides or hydroxides on the anode; the depolarization of oxygen （O₂） on the cathode. The capability of direct oxidation of CN^- to CNO^-, HS^- to SO₄⁼ might be in existence, but could not be the predominant reactions.更多还原