L-Cysteine Anchored to Fe3O4 Nanoparticle Decorated with Pd NPS as a Novel Catalyst for Reduction Organic Dyes

Organic dyes is one of the major groups of pollutants widely used in textile, plastic, medicine and many other industries, while the hazardous effects of organic dyes in waste water have been a major concern and now a major threat in the environment due to the substantial pollution problems caused by them. These industries exhausted large quantity of high content color effluents, which are generally more toxic and resistant to destruction by conventional methods. A necessary criterion in the use of these dyes is that they must be highly accumulated in water and stable in light during washing. The accumulation of these dyes in the water bodies causes eutrophication, reduces the reoxygenation capacity and makes severe damage to the aquatic organisms by hindering the infiltration of sunlight [1]. They must also be resistantcto microbial attack. Therefore, they are not readily degradable and are ctypicallycnot removed from water by wastewater treatment systems cand conventional methods like adsorption,cultrafiltration, chemical cand electrochemical methods [2,3]. An alternative type of catalysts for degradation of organic dyes is nanoparticles of some metals such as Palladium. For this purpose, A novel Nano catalyst was synthesized by covalent immobilization of L-Cysteine on the Fe3O4 core shell surface. In the following palladium ions grafted to hydrophilic organic fragment of modified fe3O4 and reduced to Pd nanoparticles by NaBH4 as a reduce reagent. The synthesized Pd nanoparticles can be employed as a magnetically recycled catalyst for the reduction of 4-nitrophenol, methylene blue and methyl orange in the presence of NaBH4 as a reducing reagent. The synthesized catalyst exhibited high catalytic activity.