神农架大九湖大气中的多环芳烃 |
摘要点击 2866 全文点击 1226 投稿时间:2016-09-28 修订日期:2016-12-09 |
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中文关键词 大九湖 大气 多环芳烃 PUF 长距离迁移 后向轨迹分析 健康风险评价 |
英文关键词 Dajiuhu atmosphere polycyclic aromatic hydrocarbons polyurethane foam long-range transport backward trajectory analysis health risks assessment |
作者 | 单位 | E-mail | 金梦云 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | 18064060779@163.com | 邢新丽 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | xingxinli5300225@163.com | 柯艳萍 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | | 郑煌 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | | 胡天鹏 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | | 孙焰 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | | 丁洋 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | | 李绘 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | | 张泽洲 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | | 祁士华 | 中国地质大学(武汉)环境学院, 生物地质与环境地质国家重点实验室, 武汉 430074 | |
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中文摘要 |
为了研究神农架大九湖大气中多环芳烃(polycyclic aromatic hydrocarbons,PAHs)的质量浓度、来源及健康风险,用聚氨基甲酸酯泡沫被动采样器对大九湖大气中的PAHs进行了季节性监测.结果表明,大气中∑PAHs的质量浓度为6.94~184.23 ng·m-3,平均值为30.36 ng·m-3,主要成分为菲(Phe)、萘(Nap)、芘(Pyr)、荧蒽(Fla)、芴(Flu)和蒽(Ant)等低环数化合物.与其他地区相比,大九湖大气中的PAHs处于较低污染水平.鹿场附近、大九湖泥炭区和大九湖管理局PAHs污染较严重.秋冬季污染较严重,春夏季污染较轻.特征化合物含量比值法和后向轨迹聚类分析法解析结果表明,大九湖大气中的PAHs污染主要来自煤和生物质的燃烧,兼有机动车尾气排放和石油源,既有当地排放又有来自湖北、河南和湖南等地的近源传输和少数西北方向的远源传输.健康风险评价结果表明,总毒性当量质量浓度(∑BaPeq)年平均值为0.208 ng·m-3,低于我国环境空气质量标准(GB 3095-2012)中规定的BaP年平均质量浓度限值(1 ng·m-3),说明大九湖大气中PAHs的健康风险较小. |
英文摘要 |
The concentration, potential source and health risks of 16 polycyclic aromatic hydrocarbons (PAHs) in the atmosphere of Dajiuhu, Shennongjia, China, were studied. Polyurethane foam (PUF) Passive air samplers (PAS) were settled. The results indicated that the total concentrations of 16 PAHs in different samples ranged from 6.94 to 184.23 ng·m-3, with the mean of 30.36 ng·m-3. The dominant compounds were low rings PAHs, such as Phe, Nap, Pyr, Fla, Flu and Ant. Compared with other regions, the PAHs pollution of Dajiuhu atmosphere was at a low level. Higher PAHs concentrations were detected in nearby Deer farm, Dajiuhu peat area and Dajiuhu Wetland Authority. Higher PAHs concentrations were detected in autumn and winter, whereas lower concentrations were detected in spring and summer. Potential pollution sources of PAHs were investigated by diagnostic ratios and backward trajectory analysis, which indicated that coal and biofuel combustion, vehicle emissions and petroleum were the main sources. PAHs of Dajiuhu in air not only came from local emission, but also originated from Hubei, Henan and Hunan's atmosphere transport for most part and long range transport from northwest direction for small part. Health risks assessment results showed that the annual average concentration of total Benzo(a)pyrene-equivalent carcinogenic potency (∑BaPeq) was 0.208 ng·m-3, lower than the value recommended by Ambient Air Quality Standard of China(GB 3095-2012, 1 ng·m-3), indicating a low carcinogenic risk for the local residents. |
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