A practical approach to the degradation of polychlorinated biphenyls in transformer oil |
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Authors: | Wu Wenhai Xu Jie Zhao Hongmei Zhang Qing Liao Shijian |
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Institution: | Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhangshan Road, Dalian 116023, PR China. |
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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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