Mechanochemical dechlorination of mono-chloro-biphenyl by its co-grinding with oxide powder

Qiwu Zhang, Yasumitsu Tanaka, Fumio Saito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A monochloro-biphenyl (BP-Cl, C6H4Cl-C 6H5) sample, as a model sample of polychlorinated biphenyl (PCB), was ground with one of oxides such as La2O3 and MgO to investigate mechanochemical dechlorination of BP-Cl According to the GC/MS analysis for the ground products with La2O3, several intermediates with biphenyl are formed by 2-hours in grinding, but any organic phases are not observed when the grinding is continued for 6-hours or more, besides amorphous carbon. The complete decomposition of BP-Cl is achieved when La2O3 is added. On the other hand, some organic phases are formed when MgO is used as an additive. It is confirmed that other rare earth oxides are also effective additives for the decomposition of BP-Cl. This suggests the use of similar effective additives for the decomposition of BP-Cl in the practical operation by heating a mineral sample containing rare earth.

Original languageEnglish
Title of host publicationREWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology - Proceedings
EditorsI. Gaballah, B. Mishra, R. Solozabal, M. Tanaka
Pages2475-2483
Number of pages9
Publication statusPublished - 2005 Dec 1
EventREWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology - Madrid, Spain
Duration: 2004 Sep 262004 Sep 29

Other

OtherREWAS'04 - Global Symposium on Recycling, Waste Treatment and Clean Technology
CountrySpain
CityMadrid
Period04/9/2604/9/29

ASJC Scopus subject areas

  • Engineering(all)

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