海水与淡水中氰化物光化学降解的对比研究

来源期刊：黄金2010年第10期

论文作者：安路阳 薛文平 尤飞 姜雪

文章页码：55 - 59

关键词：含氰废水； 光化学降解； 反应动力学

Key words：cyanide-containing wastewater； photochemical degradation； reaction kinetics

摘    要：氰化物的光化学降解是水中氰化物污染去除的重要途径之一,但在不同水体中氰化物的降解差异较大。文中对含氰海水与淡水进行了不同自然光照条件下的降解模拟试验。试验结果表明,光照越强,温度越高,氰化物降解越快;在相同试验条件下,氰化物在海水中的降解速率高于淡水。同时,还进行了紫外光照射条件下加入光催化剂TiO₂的含氰海水降解试验,反应150min即可达到排放标准要求。对降解反应的动力学进行了分析,结果表明,光化学降解氰化物为一级反应。

Abstract: The process of photochemical degradation of cyanide plays a key role in the transformation of cyanide pollutant in wastewater. But there are obvious differences in the degradation in different water bodies. Degradation simulation tests are carried out with fresh water and seawater under different natural illumination conditions. It is found that the illumination is stronger and the temperature is higher,the cyanide concentration decreases faster. Under the same conditions,the degradation rate in seawater is faster than that in fresh water. Under UV irradiation by dosing TiO₂ photocatalyst,the concentration of cyanide in seawater can meet the discharge standard within 150 min. Kinetics analysis on degradation shows that the cyanide photochemical degeneration process is a first-level reaction.