Abstract
A practical and efficient disposal method for hydrodechlorination of polychlorinated biphenyls (PCBs) in transformer oil is reported. Transformer oil containing PCBs was treated by nanometric sodium hydride (nano-NaH) and transition metal catalysts. High destruction and removal efficiency (89.8%) can be attained by nano-NaH alone under mild conditions. The process exhibits apparent characteristics of a first order reaction. The reductive ability of nano-NaH was enhanced by the addition of transition metal catalysts. In the presence of TiCl 4, 99.9% PCBs was hydrodechlorinated. The complex reducing reagents, Ni(OAc) 2 + i-PrONa, show extra hydrodechlorinating activity for di-chlorinated biphenyls.
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