Characterization of Newly Synthesized Starch Coated Fe/Cu Nanoparticles and its Dechlorination Efficiency on the Low and High Chlorinated Biphenyls

摘要

New starch coated zero-valent Fe/Cu nanoparticles were synthesized by borate reduction method. The surface profile of synthesized nanoparticles was studied by atomic force microscopy (AFM) imaging. Comparison of Infra red (IR) spectra of soluble starch and starch coated Fe/Cu nanoparticle revealed the complex formation between Fe/Cu nanoparticles and soluble starch. X-ray diffraction pattern and Energy-dispersive X-ray spectroscopy (EDX) spectrum analysis exposed the composition of starch coated Fe/Cu nanoparticles. SEM imaging determined the size of Fe/Cu nanoparticle which was fallen into the size of 48 to 70 nm. In this study, the capability of starch coated Fe/Cu nanoparticle to degrade the low and high chlorinated biphenyls were studied extensively. It was observed that soluble starch and beta-cyclodextrin have enhanced the polychlorinated biphenyl (PCB) degradation by preventing iron nano-agglomeration and making the PCB as a soluble form, respectively. The dechlorination was further confirmed by the estimation of released chloride ion during the PCB degradation. The present study suggested that this new method could be an efficient and reliable method to treat PCB contaminated soil and sediments.