| 摘要: |
| 为了获取上海环境大气中二噁英类化合物（PCDD/Fs）的浓度水平、季节和空间变化，评估上海地区人群PCDD/Fs呼吸暴露风险，选取上海16个行政区域中44个市级环境大气监控点作为采样点位，利用被动采样技术采集2019年夏、冬季大气样品共83个，分析了其中17种2，3，7，8-PCDD/Fs的浓度。结果表明：（1）2019年上海大气中PCDD/Fs的质量浓度为136~3 939 fg/m3，对应的毒性当量浓度为11.84~94.9 fg WHO2005-TEQ/m3；（2）上海冬季大气中PCDD/Fs毒性当量浓度（13.3~94.9 fg WHO2005-TEQ/m3）高于夏季（11.84~78.52 fg WHO2005-TEQ/m3）。上海郊区由于受工业生产影响，PCDD/Fs平均毒性当量浓度（夏季: 40.7 fg WHO2005- TEQ/m3; 冬季:57.4 fg WHO2005-TEQ/m3）高于中心城区（夏季: 28.5 fg WHO2005-TEQ/m3; 冬季:38.6 fg WHO2005-TEQ/m3）；（3）中心城区人群PCDD/Fs呼吸暴露量［成人：6.82 fg WHO2005-TEQ/(kg·d)；儿童：13.7 fg WHO2005-TEQ/(kg·d)］小于郊区［成人：19.17 fg WHO2005-TEQ/(kg·d)；儿童：18.4 fg WHO2005-TEQ/(kg·d)］。儿童呼吸暴露量高于成人。经对比，上海城市背景区域居民PCDD/Fs呼吸暴露风险低于上海垃圾焚烧厂周边居民，且都远低于人体PCDD/Fs每日耐受量［4 pg WHO2005-TEQ/(kg·d)］的10%，表明上海地区居民PCDD/Fs呼吸暴露风险处于可接受水平。 |
| 关键词: 被动采样 二噁英 污染水平 季节空间变化 呼吸暴露风险 上海 |
| DOI： |
| 分类号:X513 |
| 基金项目:浦东新区科技发展基金资助项目（PKJ2021-C05） |
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| Levels of Ambient PCDD/Fs and Assessment of Inhalation Risk in Shanghai |
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SHEN Xiaoyu，Deng Yunyun，WU Yaming，JIA Lijuan，MAO Wanlian，YANG Pinchuan1,2
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1.Shanghai Academy of Public Measurement，Shanghai 201203，China;2.Shanghai Environment Measurement Center，Shanghai 200000，China
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| Abstract: |
| In order to obtain the concentration levels， seasonal and spatial variations of dioxin compounds in ambient air in Shanghai， as well as the potential inhalation risk posed by these chemicals， 44 municipal ambient atmospheric monitoring points in 16 administrative regions in Shanghai were selected as sampling points， and 83 ambient air samples in summer and winter in 2019 were collected by passive air samplers to analyse the concentrations of 17 kinds of 2，3，7,8-PCDD/Fs The following results were obtained: (1)The PCDD/Fs concentrations were 136~3939 fg/m3 in ambient air from Shanghai in 2019 and the toxic equivalency(TEQ) concentrations were 11.84~94.9 fg WHO2005-TEQ/m3 (2)The PCDD/Fs TEQ concentrations in winter(13.3~94.9 fg WHO2005-TEQ/m3)were higher than that in summer (11.84~78.52 fg WHO2005-TEQ/m3) in ambient air from Shanghai Affected by industrial production， the mean PCDD/Fs TEQ concentration of PCDD/Fs showed higher levels in suburban areas(summer: 40.7fg WHO2005-TEQ/m3; winter: 57.4 fg WHO2005-TEQ/m3) than in urban areas (summer: 28.5 fg WHO2005-TEQ/m3; winter: 386fg WHO2005-TEQ/m3) (3)The PCDD/Fs inhalation exposure of the people in the urban areas ［adult：6.82 fg WHO2005-TEQ/(kg·d)；child:13.7 fg WHO2005-TEQ/(kg·d)］ was less than that in the suburban areas［adult:1917fg WHO2005-TEQ/(kg·d);child:184fg WHO2005-TEQ/(kg·d)］The inhalation exposure of children was higher than adultsBy contrast， the inhalation exposure of residents of Shanghai background area was lower than those who live in the vicinity of solid waste incinerator， far lower than 10% of the PCDD/Fs daily tolerance of the human body［4 pg WHO2005-TEQ/(kg·d)］， which indicates that the inhalation exposure risk of PCDD/Fs for local residents in Shanghai is relatively low |
| Key words: Passive sampling Dioxins Pollution level Seasonal and spatial variations Inhalation risk Shanghai |
