Atmospheric deposition of phthalate esters in a subtropical city
Atmospheric deposition of phthalate esters in a subtropical city
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DOI：
10.1016/j.atmosenv.2009.11.029
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发表时间：
2010-02
影响因子：
5
通讯作者：
Feng Zeng;Yujun Lin;Kunyan Cui;Jiaxin Wen;Yongqin Ma;Hongli Chen;Fang Zhu;Zhiling Ma;Zunxiang Z
中科院分区：
文献类型：
--
作者：
Feng Zeng;Yujun Lin;Kunyan Cui;Jiaxin Wen;Yongqin Ma;Hongli Chen;Fang Zhu;Zhiling Ma;Zunxiang Z
在中国城市，空气污染已成为严重且日益严重的环境问题，破坏城市生态系统的可持续性和城市生活质量。从 2007 年 2 月到 2008 年 1 月，每周在中国亚热带城市广州的三个代表性区域（一个郊区和两个城市化地区）采集大量大气沉降样品，以评估邻苯二甲酸酯（PAE）的沉降通量和季节变化。对大量沉积样品中的 16 种 PAE 同系物进行了测量，Σ16PAE 的沉积通量范围为 3.41 至 190 µg m−2day−1，并且受当地人类活动的影响很大。 PAE 与颗粒沉积通量之间的显着关系（相关系数 R2= 0.72，P < 0.001）表明 PAE 主要与颗粒相关。 PAEs的时间通量变化受气象参数季节变化的影响，雨季PAEs沉积通量明显高于旱季。邻苯二甲酸二异丁酯（DiBP）、邻苯二甲酸二正丁酯（DnBP）和邻苯二甲酸二（2-乙基己基）酯（DEHP）在大量沉积物中主导着PAE模式，这与中国增塑剂市场的高消费量是一致的。大量沉积中的 PAE 分布在时间和空间上都表现出相似性，并且与旱季相比，湿季高分子量 PAE (HMW PAE) 的贡献略有增加。本研究中 PAE 的平均大气沉降通量明显高于其他研究的结果，反映出该地区工业和城市快速发展带来的强烈人为输入。
In Chinese cities, air pollution has become a serious and aggravating environmental problem undermining the sustainability of urban ecosystems and the quality of urban life. Bulk atmospheric deposition samples were collected two-weekly, from February 2007 to January 2008, at three representative areas, one suburban and two urbanized, in the subtropical city, Guangzhou, China, to assess the deposition fluxes and seasonal variations of phthalate esters (PAEs). Sixteen PAE congeners in bulk deposition samples were measured and the depositional fluxes of ∑16PAEs ranged from 3.41 to 190 μg m−2day−1, and were highly affected by local anthropogenic activities. The significant relationship between PAEs and particulate depositional fluxes (correlation coefficient R2= 0.72, P < 0.001) showed PAEs are associated primarily with particles. Temporal flux variations of PAEs were influenced by seasonal changes in meteorological parameters, and the deposition fluxes of PAEs were obviously higher in wet season than in dry season. Diisobutyl phthalate (DiBP), Di-n-butyl phthalate (DnBP), and Di(2-ethylhexyl) phthalate (DEHP) dominated the PAE pattern in bulk depositions, which is consistent with a high consumption of the plasticizer market in China. PAE profiles in bulk deposition showed similarities exhibited in both time and space, and a weak increase of high molecular weight PAE (HMW PAE) contribution in the wet season compared to those in the dry season. Average atmospheric deposition fluxes of PAEs in the present study were significantly higher than those from other studies, reflecting strong anthropogenic inputs as a consequence of rapid industrial and urban development in the region.