日光/H_2O_2/草酸铁络合物光解水溶液中的直接耐酸大红

Photooxidative Degradation of Direct Fast Scarlet Dyes in Aqueous Solution under Solar lrradiation by H_2O_2/Ferrioxalate Complexes

以 H2 O2 /草酸铁络合物作光氧化剂 ,利用太阳光对水溶液中的直接耐酸大红进行了光氧化降解试验研究。结果表明 ,在日光照射下 ,H2 O2 /草酸铁络合物能使溶液中直接耐酸大红迅速光解 ,晴天光照 15 min或阴天光照 30～ 40 min,溶液 (直接耐酸大红的质量浓度为 5 0m g/ L )可褪至无色 ;溶液的初始 p H对染料光解有显著影响 ,p H为 2～ 4时光解效果最佳 ;提高 H2 O2 浓度可以提高光解速率 ,但 H2 O2

The photooxidative degradation of Direct Fast Scarlet dyes in aqueous solution under solar irradiation by H 2O 2/ferrioxalate complexes has been studied.The results indicate that the dyes in the solution can be rapidly degraded by the process.The dye solution (50 mg/L of mass concentration)is completely decolored after15 min of irradiation under sunny sky or 30~40 min under overcast sky.The initial pH of thesolution has significant effect on the photolysis.The efficiency of photolysis is highest at pH 2~4.The destruction rate of the dyes is increased with increasing concentration of H 2O 2,but the utilization efficiency of H 2O 2 is decreased at high level of H 2O 2.