“…More attention is paid than any other persistent organic pollutant (POPs) due to the fact that they are highly toxic and bioaccumulative in ecosystem, especially 17 congeners of 2,3,7,8-substituted PCDD/Fs in developing countries. The main sources of PCDD/Fs to the environment are from high temperature burning processes, e.g., incineration of municipal, clinical and industrial wastes, vehicle emissions, accidental fires, and combustion of biomass and biogenic fuels and unwanted by-products in various chemical manufacturing processes such as chlorine production, paper and pulp bleaching, petroleum refining processes (De Assunção and Pesquero, 1999;Kouimtzis et al, 2002). In 2004, China released PCDD/Fs emission inventory from nine emission sources for the first time (Jia H et al, 2011).…”