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A practical approach to the degradation of polychlorinated biphenyls in transformer oil
Wenhai Wu1, Jie Xu, Hongmei Zhao
1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhangshan Road, Dalian 116023, PR China.
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 TiCl4, 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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