Levels and patterns of polycyclic aromatic hydrocarbons and polychlorinated biphenyls in municipal waste incinerator bottom ash in Zhejiang province, China.
Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) were analyzed in bottom ash from municipal solid waste (MSW) incineration in six cities in Zhejiang province, where one-fourth of the MSW incinerators of China are located. Total PAH contents varied from 2222.53 to 6883.91 microg/kg. The patterns of PAHs were found to be very similar in all the samples, dominated by three-ring and four-ring PAHs. Total PCB concentrations in bottom ash ranged from 1.00 to 1.31 microg/kg, while the coplanar PCBs in the bottom ash were in the range of 0.08-0.52 microg/kg. Among PCB congeners, low chlorinated PCBs contributed to the majority of total PCBs. Generally, PAH concentrations in cities with fluidized bed incinerator were less than those in cities with grate furnace incinerator. PAH and PCB levels were affected by both plastic content in MSW incinerator feed and combustion efficiency. However, further study is required to investigate the effect of these two variables deeply, as well as other influencing factors.
Shen
Chaofeng
C
Department of Environmental Engineering, College of Environmental and Resource Science, Zhejiang University, Kaixuan Road 268, 310029 Hangzhou, PR China. shenchaofeng@gmail.com
Tang
Xianjin
X
Yao
Jun
J
Shi
Dezhi
D
Fang
Jie
J
Khan
Muhammad Imran
MI
Cheema
Sardar Alam
SA
Chen
Yingxu
Y
D002273:Carcinogens / Q000032:analysis*; D002681:China; D004785:Environmental Pollutants / Q000032:analysis*; D017745:Incineration; D010969:Plastics / Q000032:analysis; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012037:Refuse Disposal
D002273:Carcinogens; D004785:Environmental Pollutants; D010969:Plastics; D011084:Polycyclic Aromatic Hydrocarbons; D011078:Polychlorinated Biphenyls