A practical approach to the degradation of polychlorinated biphenyls in transformer oil.
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.
Wu
Wenhai
W
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhangshan Road, Dalian 116023, PR China.
Xu
Jie
J
Zhao
Hongmei
H
Zhang
Qing
Q
Liao
Shijian
S
D002384:Catalysis; D002713:Chlorine / Q000737:chemistry*; D003035:Cobalt; D004560:Electricity; D007219:Industrial Oils; D007220:Industrial Waste; D008832:Microchemistry; D009532:Nickel; D009821:Oils / Q000737:chemistry*; D010084:Oxidation-Reduction; D011078:Polychlorinated Biphenyls / Q000737:chemistry*; D017670:Sodium Compounds / Q000737:chemistry*; D014025:Titanium; D018505:Waste Management / Q000379:methods*
D007220:Industrial Waste; D009821:Oils; D017670:Sodium Compounds; D003035:Cobalt; D002713:Chlorine; D009532:Nickel; C025096:titanium tetrachloride; D014025:Titanium; D011078:Polychlorinated Biphenyls; C018021:cobaltous chloride