Colour removal of phthalocyanine based reactive dye by nanoparticles

Synthesized iron-nickel (Fe-Ni) bimetallic nanoparticles (NPs) were utilized for the colour removal of C. I. Reactive Blue 21 (RB21) dye. NPs agglomeration was prevented using polyvinyl pyrrolidone (PVP) as a capping agent. The NPs were characterized by nanoparticle size analysis, TEM, XRD and EDX. The operational conditions like pH, NPs concentration and initial dye concentration for decolourization were optimized using mathematical modelling, and its kinetics were studied. Influence of the presence of alkali and salt on dye decolourization was also investigated. Decolourization products were analysed by using FTIR and GCMS analysis. 93.46% of dye decolourization was obtained and a reduction in COD, BOD values was achieved along with minimal sludge generation.