Concentrations and Profiles of PCDD/Fs in Agricultural Soils from Beijing City
In order to evaluate the contamination caused by PCDD/Fs in Beijing agricultural soil, 23 different type soil samples were collected from July to June 2005, and each sample was analyzed for PCDD/Fs by high-resolution gas chromatography/high- resolution mass spectrometry. Total concentrations of PCDD/Fs in soil samples ranged from 0.26 to 5.74 (mean 1.54) pg I-TEQ/g dry wt. In vegetable, the range from 0.26 to 5.62 (mean 1.75) pg I-TEQ/g, dry wt; the grain from 0.71 to 5.74(mean 2.06) pg I-TEQ/g and for the orchard was from 0.34 to 2.02(mean 0.727) pg I-TEQ/g, dry wt, the concentrations in grain soils was the highest, next was the vegetable, and the orchard was the lowest. Concentrations of PCDD/Fs in soil sample were comparable to other countries, Beijing was rather low in examined area. Basis on of guidelines for PCDD/Fs in Germany and U.S.A, site 8 and 16 were analyzed, but 9％ (2 of 23) could not be expected to pose human health hazards. Site 23, near a MSW incinerator, also was analyzed, and should be more interested for further studies. The wide range of PCDD/Fs isomers detected in many locations also suggests the presence of a multitude of sources, including herbicides and solid waste incinerator, such as scrap wires, plastics, papers, straw stalk incineration at random, and emission of automobile exhaust.
PCDD/Fs Beijing agricultural soils
ZHOU Zhiguang TIAN Honghai LI Nan REN Yue LI Lingling DU Bing LIU Aimin
Dioxins Lab of National Research Center for Environment Analysis and Measurements, Beijing 100029, China
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）