摘要
采用高分辨气相色谱高分辨质谱联用仪(HRGC/HRMS)对白银市不同功能区土壤样品中的17种2,3,7,8-PCDD/Fs的含量进行了测试,探讨了白银市典型区域表层土壤中PCDD/Fs的来源、分布特征。结果表明,白银市各类表层土壤中17种2,3,7,8-PCDD/Fs的I-TEQ浓度范围为0.42～8.56pg(I-TEQ)·g-1,均值为2.28pg(I-TEQ)·g-1,其中,工业区土壤中PCDD/Fs含量为0.42～8.56pg(I-TEQ)·g-1,均值为3.37pg(I-TEQ)·g-1;城市生活区PCDD/Fs的含量为0.50～1.83pg(I-TEQ)·g-1,均值为1.31pg(I-TEQ)·g-1;农业区含量为0.49～1.33pg(I-TEQ)·g-1,均值为1.01pg(I-TEQ)·g-1;两个背景点PCDD/Fs的含量分别为0.60和1.10pg(I-TEQ)·g-1。研究区域内PCDD/Fs的含量呈现工业区>城市生活区>农业区>背景区的趋势,高氯代的PCDD/Fs异构体对土壤中二恶英毒性当量的贡献率较大。
The concentrations of seventeen PCDD/Fs components in 23 surface soil samples collected from different regions of Baiyin City were determined using HRGC/HRMS.The range of 2,3,7,8-PCDD/Fs in the soils samples was 0.42～8.56 pg（I-TEQ）·g-1 with an average value of 2.28 pg（I-TEQ）·g-1.The concentrations of PCDD/Fs in the samples from the local industrial,urban,agricultural and background areas were 0.42～8.56 pg（I-TEQ）·g-（1average at 3.37 pg（I-TEQ）·g-1）,0.50～1.83 pg（I-TEQ）·g-（1average at 1.31 pg（I-TEQ）·g-1）,0.49～1.33 pg（I-TEQ）·g-（1average at 1.01 pg（I-TEQ）·g-1）,and 0.60～1.10 pg（I-TEQ）·g-（1average at 0.85 pg（I-TEQ）·g-1）,respectively.The concentration results showed an order as industrial land urban land agricultural land background land.The high chloro-isomers of PCDD/Fs were the dominant contributor of TEQ in most of the samples in this study.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2010年第6期1137-1143,共7页
Journal of Agro-Environment Science
基金
"十一五"国家科技支撑(2007BAC16BO8)
