Separation of PCBs from PCB-adsorbed Activated Carbon Using a Vacuum Thermal Recycling Process

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  • Saitoh Satoshi
    Department of Engineering, Z.E.R.O.-JAPAN CO., LTD. Department of Chemical Engineering, Tokyo University of Agriculture and Technology
  • Zhu Bingqiao
    Department of Chemical Engineering, Tokyo University of Agriculture and Technology
  • Konno Sachiko
    Department of Chemical Engineering, Tokyo University of Agriculture and Technology
  • Ohbayashi Hiroshi
    Department of Engineering, Z.E.R.O.-JAPAN CO., LTD.
  • Nakai Satoshi
    Department of Chemical Engineering, Tokyo University of Agriculture and Technology
  • Hosomi Masaaki
    Department of Chemical Engineering, Tokyo University of Agriculture and Technology

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Other Title
  • 真空加熱分離法によるPCBを吸着した活性炭からのPCB分離挙動
  • シンクウ カネツ ブンリホウ ニ ヨル PCB オ キュウチャク シタ カッセイタン カラ ノ PCB ブンリ キョドウ

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Abstract

A vacuum thermal recycling (VTR) process was applied to separate PCBs from PCB-adsorbed activated carbon. Maintaining the PCB-adsorbed activated carbon samples (151 mg/kg, 101 mg/kg) at temperatures greater than 400°C at less than 600 Pa for 2 hours, PCBs were separated almost completely, thereby meeting the target value of 0.5 mg/kg. These results indicate good feasibility of treating PCB-adsorbed activated carbon using VTR processing. The homologue pattern of the trace amount of PCBs in the treated activated carbon showed that dechlorination was dependent on temperature and treatment time. The fraction of non/mono-chlorinated biphenyls in the separated PCBs was higher than that in the PCB-adsorbed activated carbon before treatment. Results showed that VTR processes separated PCBs from PCB-adsorbed activated carbon. In addition, they caused dechlorination to change its homologue pattern.

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