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乌鲁木齐市典型城区大气PAHs气-粒分配特征

张腾林 迪丽努尔·塔力甫 王新明 王果 丁翔 买里克扎提·买合木提 亚力昆江·吐尔逊

张腾林, 迪丽努尔·塔力甫, 王新明, 王果, 丁翔, 买里克扎提·买合木提, 亚力昆江·吐尔逊. 乌鲁木齐市典型城区大气PAHs气-粒分配特征[J]. 环境科学研究, 2016, 29(10): 1408-1416.
引用本文: 张腾林, 迪丽努尔·塔力甫, 王新明, 王果, 丁翔, 买里克扎提·买合木提, 亚力昆江·吐尔逊. 乌鲁木齐市典型城区大气PAHs气-粒分配特征[J]. 环境科学研究, 2016, 29(10): 1408-1416.
ZHANG Tenglin, DILNUR Talip, WANG Xinming, WANG Guo, DING Xiang, MAILILEZHATI Maihemuti, YALIKUNJIANG Tuerxun. Gas-Particle Partitioning of Atmospheric Polycyclic Aromatic Hydrocarbons in the Urban Area of Urumqi City, China[J]. Research of Environmental Sciences, 2016, 29(10): 1408-1416.
Citation: ZHANG Tenglin, DILNUR Talip, WANG Xinming, WANG Guo, DING Xiang, MAILILEZHATI Maihemuti, YALIKUNJIANG Tuerxun. Gas-Particle Partitioning of Atmospheric Polycyclic Aromatic Hydrocarbons in the Urban Area of Urumqi City, China[J]. Research of Environmental Sciences, 2016, 29(10): 1408-1416.

乌鲁木齐市典型城区大气PAHs气-粒分配特征

基金项目: 国家自然科学基金项目(41165006,41465007);中国沙漠气象科学研究基金项目(Sqj2013003)

Gas-Particle Partitioning of Atmospheric Polycyclic Aromatic Hydrocarbons in the Urban Area of Urumqi City, China

  • 摘要: 大气中PAHs的气-粒分配是影响其在大气中分布、迁移和转化的一个重要因素,于2011年12月—2012年12月在乌鲁木齐市天山区采集大气气相和颗粒相样品,对聚氨酯泡沫样品的气相和石英纤维膜的颗粒相(TSP)中的16种PAHs进行分析.结果表明:采样期间颗粒相和气相中ρ(∑16PAHs)总和的年均值为(116.71±92.74) ng/m3,采暖期〔(173.16±84.26) ng/m3〕是非采暖期〔(39.46±16.19) ng/m3〕的4.4倍;采暖期颗粒相中ρ(∑16PAHs)平均值为(40.60±3.03) ng/m3,气相为(134.46±13.05) ng/m3,2~3环PAHs主要存在于在气相中,4~6环PAHs主要存在于颗粒相中.在非采暖期,颗粒相ρ(∑16PAHs)平均值为(25.37±3.21) ng/m3,气相为(14.95±1.06) ng/m3.采用吸附和吸收模型对PAHs的分配特征进行了研究,表明PAHs的lg Kp(Kp为分配系数)与lg PL0(PL0为过冷蒸汽压)线性关系显著,在采暖期斜率绝对值为0.34,说明PAHs的气-粒分配以吸收为主;在非采暖期的斜率绝对值为0.78,表明PAHs的气-粒分配受吸收和吸附共同作用.PAHs的lg Kp与lg Koa(Koa为正辛醇-大气分配系数)线性关系显著,在采暖期斜率为0.38,表明PAHs气-粒分配并未达到平衡;在非采暖期,斜率为1.22,表明PAHs气-粒分配接近平衡.研究显示,乌鲁木齐市城区大气PAHs气-粒分配在采暖期及非采暖期特征不同,应区别制订政策和管理措施.

     

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  • 收稿日期:  2016-01-21
  • 修回日期:  2016-06-14
  • 刊出日期:  2016-10-25

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