SPATIAL AND SEASONAL VARIATION OF PCDD/FS AND COPLANAR PCBS IN THE AMBIENT AIR OF A STEEL CITY, NORTHEAST CHINA
Air monitoring of 2,3,7,8-subsitited PCDD/Fs and coplanar PCBs was carried out in June 2008 and January 2009 to investigate the concentrations, profiles and seasonal variations of atmospheric dioxins in Anshan, a large steel city of Northeast China. Air samples were collected by using high volume air samplers and the glass fiber filter and polyurethane foam were used for absorbing particle-bound and gaseous chemicals, respectively. The PCDD/Fs and coplanar PCBs were analyzed by the isotope dilution HRGC/HRMS according to US EPA method 1613B and 1668A. The air concentrations of PCDD/Fs were in a low level, with the I-TEQ values in the range 0.004～0.26 pg m-3 (average 0.08 pg m-3). With regard to coplanar PCBs, TEQ concentrations varied between 0.0006～0.0186 pg m-3, contributing 3.6％ to 26％ to the total TEQ. Although the steel plant sites exhibited higher dioxin levels than the residential and background area, the impact of the steel PCDD/F emissions to the ambient air appears not in a significant level.
Li Y M Yang H B Zhang Q H Wei F S
Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,P.O. Box 2871,Beijing 100 Anshan Environmental Monitoring Center,Anshan 114104,Liaoning Province,China Environmental Monitoring Center in China,Beijing 100012,China
国际会议
北京
英文
1-4
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）