FeY催化剂光助Fenton法降解亚甲基蓝染料废水

文章以NaY分子筛为载体,通过离子交换法制备FeY催化剂,并对其在非均相光-Fenton体系中催化降解亚甲基蓝染料废水进行了研究,考察其催化降解性能、重复性和再生性。结果表明,在反应温度为25℃、FeY催化剂投加量为1 g/L、H2O2浓度为4 mmol/L、pH为4、UV光照射60 min时,非均相体系对染料废水的脱色率和COD去除率分别达到97%和84%。通过比较发现,相对于黑暗条件,太阳光和UV光都能显著提高降解效率,并且两种光源效果相当。FeY催化剂比均相催化剂具有更高的催化活性,并且脱附率低,重复性较好,经500℃焙烧2 h的再生催化剂对染料废水的脱色率和COD去除率均可达原来的90%以上。

Degradation of Dye Methylene Blue Wastewater by Photo-Fenton Reaction Using FeY Catalyst

FeY catalyst was prepared by ion exchange with iron immobilized on NaY zeolite,and used for catalytic degradation of dye methylene blue wastewater by heterogeneous photo-Fenton process to study its catalytic degradation property,reusability and reproducibility.Results indicated that 97% color and 84% COD removals could be attained by UV light irradiation for 60min at 25 ℃,1 g/L FeY catalyst,4 mmol/L H2O2 and pH 4.By comparison,it was found that sunlight and UV light irradiation can enhance the degradation of dye,with almost equivalent efficiency.The heterogeneous FeY catalyst has a higher catalytic activity in comparison to homogeneous catalyst.Because of low desorption rate of iron,FeY catalyst can be reused with a good stability.FeY catalyst can be reproduced by calcination at 500 ℃ for 2 h with color and COD removals up to above 90% of the beginning.