| 广州某工业区大气中PCDD/Fs含量水平及其季节性变化特征 |
| 摘要点击 3217 全文点击 2034 投稿时间：2013-05-15 修订日期：2013-09-04 |
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| 中文关键词 环境空气 工业区 季节性变化 二(口恶)英(PCDD/Fs) 分布特征 |
| 英文关键词 atmosphere industrial area seasonal variation polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) distribution characteristics |
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| 中文摘要 |
| 通过对广州某工业区大气中2，3，7，8-PCDD/Fs的季节性监测，并对大气中PCDD/Fs的浓度与季节性变化进行了分析. 结果表明，该工业区大气中PCDD/Fs的浓度范围为2.33~75.4 pg·m-3，平均值为23.2 pg·m-3，毒性当量浓度I-TEQ范围为0.229~10.7 pg·m-3，平均值为2.00 pg·m-3，高于日本环境空气质量标准推荐年均值0.6 pg·m-3. 该工业区PCDD/Fs浓度季节性变化明显，最高的季节为春季（37.8 pg·m-3），浓度最低的季节为夏季（13.5 pg·m-3），其次为秋季（22.3 pg·m-3）和冬季（19.1 pg·m-3）；毒性当量浓度变化高低顺序为：春季（5.58 pg·m-3）>夏季（1.06 pg·m-3）>秋季（0.839 pg·m-3）>冬季（0.525 pg·m-3）. 降雨、季风的季节性变化可能是引起大气中PCDD/Fs浓度季节性变化的原因. |
| 英文摘要 |
| Atmospheric concentrations of 2,3,7,8-substituted polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) were measured seasonally in an industrial area of Guangzhou City. And seasonal variation of concentrations and distribution characteristics of 2,3,7,8- PCDD/Fs was investigated. The PCDD/Fs concentrations and corresponding I-TEQ (toxic equivalent quantity) values were in the range of 2.33-75.4 pg·m-3 (mean=23.2 pg·m-3) and 0.229-10.7 pg·m-3 (mean=2.00 pg·m-3), respectively. The seasonal variation of PCDD/Fs concentrations was obvious, with the highest concentration was found in spring (37.8 pg·m-3) and the lowest in summer (13.5 pg·m-3). However, no obvious difference of concentrations was observed for autumn (22.3 pg·m-3) and winter (19.1 pg·m-3). The seasonal variation of I-TEQ values is as follows: spring (5.58 pg·m-3)>summer (1.06 pg·m-3)>autumn (0.839 pg·m-3)>winter (0.525 pg·m-3). The influences of monsoon and rainfall on the concentration of PCDD/Fs in atmosphere are discussed. |
