Analysis and Measurement Center of Beijing Municipal Drainage Corporation, Beijing 100124, China.
Chemosphere. 2011 Jan;82(5):635-8. doi: 10.1016/j.chemosphere.2010.11.039. Epub 2010 Dec 8.
The levels of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) were analyzed by an isotope-dilution high-resolution mass spectrometric in 16 sewage sludges, sampled from 2004 to 2009, from two municipal wastewater treatment plants (WWTPs) in Beijing. Total toxicity equivalent (TEQ) values were evaluated using the toxicity equivalent factors proposed by International for PCDD/Fs. The I-TEQs for these sewage sludges were from 0.97 to 15.0pgg(-1) dry weight (dw) with a mean value 4.43pgg(-1) dw, indicating that all I-TEQs were below Chinese legislation limit value regulated for agricultural use in soils. The results from limited samples (16 samples) showed that the levels of PCDD/Fs might be correlated with the sludge age. Meanwhile, the temporal trends of PCD/Fs suggested that the I-TEQs may correlate with rainfall in the present study.
采用同位素稀释高分辨质谱法分析了 2004 年至 2009 年期间从北京两个城市污水处理厂采集的 16 份污水污泥中的多氯二苯并对二恶英（PCDDs）和多氯二苯并呋喃（PCDFs）水平。采用国际 PCDD/Fs 毒性等效因子评估总毒性当量（TEQ）值。这些污水污泥的 I-TEQs 为 0.97 至 15.0pg/g 干重（dw），平均值为 4.43pg/g dw，表明所有 I-TEQs 均低于中国规定的土壤农业用途限量值。有限样本（16 个样本）的结果表明，PCDD/Fs 的水平可能与污泥龄有关。同时，PCDFs 的时间趋势表明，在本研究中，I-TEQs 可能与降雨量有关。
