摘要：

在紫外光辐射下，以负载于γ-Al₂O₃上的银镍共掺TiO₂为催化剂、H₂O₂为氧化剂的催化氧化体系处理硝基苯废水。通过单因素实验法，研究了pH、H₂O₂用量、光照强度、温度、反应时间、催化剂用量等因素对该体系催化氧化硝基苯效果的影响。结果表明，对于100 mL 250 mg/L的硝基苯废水，当pH=3，30% H₂O₂投加体积为2.0 mL，反应温度为60℃，光照强度为70 W，催化剂投加量为0.5 g，反应时间为50 min时，该体系对废水中硝基苯的去除率可达到99.3%，COD去除率为69%。

关键词: 银镍共掺二氧化钛, 负载型催化剂, 硝基苯废水

Abstract:

Under ultraviolet irradiation,the catalytic oxidation systemusing Ag-Ni co-doped titaniumdioxide loaded on γ-Al₂O₃ as catalyst and hydrogen peroxide as oxidant has been applied to the treatment of nitrobenzene wastewater. Through single-factor experiments,the influences of the factors,such as pH,hydrogen peroxide dosage,illumination intensity,temperature,reaction time,catalyst dosage,etc. on the catalytic oxidation nitrobenzene effect of the system are studied. The results show that For 100 mL of nitrobenzene wastewater,whose mass concentration is 250 mg/L,when pH is 3,30% hydrogen dioxide dosage volume 2 mL,reaction temperature 60℃,illumination intensity 70 W,catalyst dosage 0.5 g,and reaction time 50 min,the removing rate of nitrobenzene from wastewater by the systemcan reach 99.3%and COD removing rate 60%.

Key words: Ag-Ni co-doped TiO₂, supported catalyst, nitrobenzene wastewater

中图分类号: 

• X703