二氧化氯稳定性pε-pH分析  

Analysis on the Stability of Aqueous Chlorine Dioxide

作　　者：田朝晖[1] 裴元生[1] 

机构地区：[1]兰州铁道学院环境科学与工程学院,甘肃兰州730070

出　　处：《兰州铁道学院学报》2002年第4期71-74,共4页Journal of Lanzhou Railway University

摘　　要：在氯体系 pε- pH图上探讨了标准状态下pε和 pH对天然水体中二氧化氯稳定性的影响 .如水溶液中二氧化氯歧化为氯酸根的反应速率很低时 ,二氧化氯相对稳定 ,并与亚氯酸根、氯分子或氯离子稳定共存 .当氯体系实现最终平衡时 ,二氧化氯仅在强酸介质中优势存在 ,随着酸度降低 ,二氧化氯歧化为氯酸根和氯气 ,水溶性二氧化氯在常规Effects of electron activity (pε) and pH on the stability of chlorine dioxide (ClO 2) are discussed in the pε-pH diagrams of chlorine system. If disproportionation rate of ClO 2 into chlorate is low enough,ClO 2 would be relatively stable and coexist with chlorite (pε 17.63 ClO 2 and pH>9.68), molecular chlorine (pH<0.92), or chloride ion (pH 0.92-9.68). When chlorine system has already reached the ultimate equilibria, ClO 2 is a stable species only in strongly acid media. As the acidity decreases, ClO 2 will disproportionate into chlorate and molecular chlorine. Aqueous ClO 2 is unstable within the normal pH range.

关 键 词：二氧化氯 稳定性 电子活度 pε-pH图 

分 类 号：O613.42[理学—无机化学]