Mechanochemical decomposition of pentachlorophenol by ball milling
WEI Yinglei , YAN Jianhua , LU Shengyong , LI Xiaodong
DOI:
Received January 17, 2009,Revised July 23, 2009, Accepted , Available online
Volume 21,2009,Pages 1761-1768
- Summary
- References
- Related Articles
The mechanochemical dechlorination of pentachlorophenol (PCP) was studied using CaO and SiO2 powder as additives. The e ects
of the milling time and additives on the dechlorination rate were investigated. The resulting product was characterized by X-ray
di raction (XRD), Fourier transform infrared spectra (FT-IR), thermogravimetric analysis (TG) and ion chromatography (IC). It is
found that grinding operation could dechlorinate PCP, with the formation of inorganic chloride and amorphous carbon. The addition
of quartz to the grinding mixture facilitated dechlorination. On the basis of the experimental results, the decomposition mechanism
was proposed. Decomposition predominantly proceeds through rupture of C–Cl bond in PCP molecule, followed by the formation of
inorganic chlorides.
