Activated carbon supported iron-nickel bimetallic nanoparticles for decolorization of Reactive Black 5 wastewater

AbstractIn this study, a synthesized activated carbon supported iron-nickel bimetallic nanoparticles complex (nFeNi-GAC) material was proposed for the decolorization of wastewater which contained Reactive Black 5. From results, the successful reductive decolorization of RB5 wastewater was observed using nFeNi-GAC material. An nFeNi-GAC load of 20 g l−1 with various Fe/Ni compositions was capable to decolorize RB5 from 80 to 100%. For fixed Fe/Ni ratio of 6.91:0.86, the higher nFeNi-GAC dosage performed, the higher RB5 removal efficiency. At very high initial RB5 concentration of 800 mg l−1, 20 g l−1 nFeNi-GAC material was able to remove about 80% of RB5 dye. The nFeNi-GAC material showed excellent pH resistant ability than nano iron-nickel bimetallic particles without support. For temperature from 0 to 60°C, the reductive decolorization rate increased with increasing temperature. From durability test, for three cycles of reductive decolorization, nFeNi-GAC material still showed about 96% of decolorization...