This work evaluates the scope of alternative sources of iron i.e. Foundry Sand (FS), Fly Ash (FA) and mixture of FS and FA in heterogeneous photo-Fenton process for the degradation and decolourization of the dye Reactive Black5 (RB5). SEM-EDS characterization of FS and FA confirmed the presence of iron and aluminium which are required for photo-Fenton. In case of FS as an iron source, results confirmed the degradation and decolourization efficiency of 90% in 70 min and 45 min respectively when the reaction parameters were H₂O₂ = 2.2 mM, FS dose = 0.5 g, pH 3. With FA 90% degradation was achieved within 30 min and 93% decolourization rate within 15 min. When a mixture of FS (0.1 gm) and FA (0.05 gm) is used as source of iron 99% degradation and decolourization of the dye was achieved under the reaction conditions where H₂O₂ = 2.2 mM, FA:FS = 1:2, pH 3.

这项工作评估了铁的替代来源的范围，即铸造砂（FS），粉煤灰（FA）以及FS和FA在异质光Fenton工艺中用于染料活性黑5（RB5）的降解和脱色的混合物。FS和FA的SEM-EDS表征证实了光芬顿所需的铁和铝的存在。在FS为铁源的情况下，结果证实当反应参数为H ₂ O ₂时，分别在70分钟和45分钟内降解率和脱色效率分别为90％＝ 2.2mM，FS剂量＝ 0.5g，pH3。用FA，在30分钟内降解90％，在15分钟内脱色率93％。当使用FS（0.1 gm）和FA（0.05 gm）的混合物作为铁源时，在H ₂ O ₂ = 2.2 mM，FA：FS = 1的反应条件下，染料的降解和脱色得以实现。 2，pH 3。