| 广州某观测点春季大气样品中二NFDA1英日均浓度变化分析 |
| Preliminary Analysis of Spring Atmospheric PCDD/Fs Daily Concentrations Change in Guangzhou |
| 投稿时间：2012-03-06 修订日期：2012-07-10 |
| DOI： |
| 中文关键词: PCDD/Fs 大气 I-TEQ 连续监测 |
| 英文关键词:PCDD/Fs ambient air I-TEQ continuous monitoring |
| 基金项目:公益性行业科研专项(200909095B) |
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| 通讯作者:任明忠* 华南环境科学研究所, 广东 广州 510655 任明忠 |
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| 中文摘要: |
| 在广州某商住区楼顶开展为期1个月的大气样品连续采样,利用高分辨气相色谱-高分辨质谱仪测定了样品中17种毒性二 NFDA1 英(PCDD/Fs)的含量。结果表明,该采样点位样品二 NFDA1 英I-TEQ浓度范围为0.094~1.34 pg I-TEQ/m3,样品日平均浓度相对偏差范围为3.2%~118.8%,6日平均浓度相对偏差范围为1.2%~60.1%,6日平均值更能较好地反映样品长期平均浓度。气象变化对样品中二 NFDA1 英I-TEQ浓度有明显影响,降雨后样品中的二 NFDA1 英I-TEQ浓度明显低于降雨前,降雨前或降雨中样品的二 NFDA1 英I-TEQ浓度与降雨后样品比值最高达到9.0,样品二 NFDA1 英I-TEQ浓度与PM2.5的线性相关性高于其与TSP、温度相关性,上述三者的r值和P值分别为0.637、-0.296、0.271和0.611、0.326、0.329。 |
| 英文摘要: |
| Atmospheric samples were continuously collected day by day during a month at a residential area in Guangzhou. The concentrations of the polychlorinated p-dibenzodioxins and dibenzofurans (PCDD/Fs) in the samples were analyzed by high resolution gas chromatography/high resolution mass spectrometry. The results showed that the mean value of I-TEQ of the daily air samples ranged from 0.094 pg I-TEQ/m3 to 1.34 pg I-TEQ/m3. The relative error range of the daily mean I-TEQ value was 3.2%-118.8%. However, for the 6-day mean of the air samples, the relative error range was 1.2%-60.1%, which was less than that of the daily mean value. This reflects that the 6-day mean I-TEQ value maybe represent the long-term concentration level of the collecting sample enviroment. The changes of the meteorology perceptibly affect the mean I-TEQ values, the mean I-TEQ values of samples collected after the rainfall was apparently lower than that of the sample colected before rainfall, and the ratio up to 9.0. The linear correlation of the mean I-TEQ values to PM2.5 is better than that to TSP and to temperature's, the R and P were 0.637、-0.296、0.271 and 0.611、0.326、0.329, respectively. |
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