Levels of PCDD/Fs in soil in the vicinity of a medical waste incinerator in China: the temporal variation during 2007-2009.
In 2004, it is estimated that 1.18 kg I-TEQ of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) emitted from medical waste incinerators (MWIs) in China, accounting for 11.5% of the total PCDD/Fs emissions. So it is essential to assess the environmental impact of MWIs. A new MWI of China was started operation in May 2007, and implemented an advanced technology in the combustion and air pollution control system by the BAT/BEP guideline in August 2008. From 2007 to 2009, levels of PCDD/Fs were determined in soil collected in the vicinity of this MWI. The blank survey (2007) was conducted before the start-up operation of this plant. After the operation, soil samples were collected again at the same sampling sites as the blank survey. The average concentration of PCDD/Fs in soil increased from 1.13 pg I-TEQ g(-1) to 2.29 pg I-TEQ g(-1) after 1 year operation of the MWI (2007-2008), and a marked decrease (0.50 pg I-TEQ g(-1)) was observed during 2008-2009. In addition, the current level (2009) was still higher than the blank value (2007). The composited analysis of the experimental results indicated levels of PCDD/Fs were still comparative lower and a limited neighbourhood of the MWI was slightly affected by the emission from this incinerator, meanwhile other un-known PCDD/Fs sources and potential influenced factors could not be neglected in this investigated region.
Li
Xiao-dong
XD
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China. lixd@cmee.zju.edu.cn
Yan
Mi
M
Chen
Tong
T
Lu
Sheng-yong
SY
Yan
Jian-hua
JH
Cen
Ke-fa
KF
D001572:Benzofurans / Q000032:analysis*; D002244:Carbon / Q000032:analysis; D002681:China; D060729:Coal Ash; D004784:Environmental Monitoring; D017745:Incineration; D008506:Medical Waste / Q000032:analysis*; D017744:Medical Waste Disposal / Q000379:methods*; D052638:Particulate Matter / Q000032:analysis; D010944:Plants / Q000737:chemistry; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis; D025341:Principal Component Analysis; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis; D013997:Time Factors; D014197:Trees
D001572:Benzofurans; D060729:Coal Ash; D008506:Medical Waste; D017744:Medical Waste Disposal; D052638:Particulate Matter; D000072317:Polychlorinated Dibenzodioxins; D012987:Soil; D012989:Soil Pollutants; D002244:Carbon; C023614:dibenzofuran