Spatio-temporal variations and influencing factors of polycyclic aromatic hydrocarbons in atmospheric bulk deposition along a plain-mountain transect in western China
Spatio-temporal variations and influencing factors of polycyclic aromatic hydrocarbons in atmospheric bulk deposition along a plain-mountain transect in western China
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中国西部平原山地断面大气沉降多环芳烃时空变化及影响因素
DOI：
10.1016/j.atmosenv.2016.05.027
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发表时间：
2016-08
影响因子：
5
通讯作者：
Shihua Qi
中科院分区：
文献类型：
--
作者：
Xinli Xing;Yuan Zhang;Dan Yang;Jiaquan Zhang;Wei Chen;Chenxi Wu;Hongxia Liu;Shihua Qi
2007年6月至2008年6月，连续4个季节（约每3个月）在成都平原大营至清平的平原-山地样带（即PMT样带）部署了10个大气散装沉降（干湿沉降总和）多环芳烃（PAHs）采样器。∑15-PAHs的体沉积通量为169.19 ~ 978.58 μ m−2yr−1，几何平均值为354.22 μ m−2yr−1。多环芳烃以4环（39.65%）和3环（35.56%）居多。通量值与农村地区相当。PMT样带中部（SL、YX和JY）总PAHs通量较高，城市化程度高于其他样带。采样剖面的季节性沉积通量表明，污染源的季节性是控制沉积通量的重要因素。多环芳烃体沉降与气象参数（温度、风速、湿度、降水）呈负相关。沿该样带土壤浓度与大气沉降之间无显著相关性。土壤样品中的多环芳烃有煤、木材和石油燃烧的复合来源，而煤、木材和草燃烧的单一来源为大块沉积。年大气体积沉降与局地多环芳烃排放呈显著正相关（p < 0.05），其中生物质燃烧是多环芳烃排放总量的主要来源。根据沉积/排放比，该样带作为重要的多环芳烃源而不是汇。海拔1000 m以上的样带存在山地冷阱效应。远距离输运对夏季大块沉积有影响。前向轨迹分析表明，由于周围山脉的阻挡作用，大部分气团没有进行远距离输送。只有少数气团（<10%）通过远程输送到达中国东部和北部地区或更远的地区。
Ten atmospheric bulk deposition (the sum of wet and dry deposition) samplers for polycyclic aromatic hydrocarbons (PAHs) were deployed at a plain-mountain transect (namely PMT transect, from Daying to Qingping) in Chengdu Plain, West China from June 2007 to June 2008 in four consecutive seasons (about every three months). The bulk deposition fluxes of ∑15-PAHs ranged from 169.19 μg m−2yr−1to 978.58 μg m−2yr−1with geometric mean of 354.22 μg m−2yr−1. The most prevalent PAHs were 4-ring (39.65%) and 3-ring (35.56%) PAHs. The flux values were comparable to those in rural areas. Higher fluxes of total PAHs were observed in the middle of PMT transect (SL, YX and JY, which were more urbanized than other sites). The seasonal deposition fluxes in the sampling profile indicated seasonality of the contaminant source was an important factor in controlling deposition fluxes. PAHs bulk deposition was negatively correlated with meteorological parameters (temperature, wind speed, humidity, and precipitation). No significant correlations between soil concentrations and atmospheric deposition were found along this transect. PAHs in soil samples had combined sources of coal, wood and petroleum combustion, while a simple source of coal, wood and grass combustion for bulk deposition. There were significant positive correlation relationship (p < 0.05) between annual atmospheric bulk deposition and local PAHs emission, with biomass burning as the major contribution to the total emission of PAHs. This transect acts as an important PAHs source rather than being a sink according to the ratio of deposition/emission. Mountain cold trap effect existed in this transect where the altitude was higher than 1000 m. Long-range transport had an impact on the bulk deposition in summer. And this transect was a source to Tibetan only in summer. The forward trajectory analysis showed most air masses did not undergo long-range transport due to the blocking effect of surrounding mountains. Only a few air masses (<10%) arrived at the eastern and northern region of China or farther regions via long-range transport.
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影响因子：
5.7
作者：
X. Xing;S. Qi;Y. Zhang;Dan Yang;J. Odhiambo
通讯作者：
X. Xing;S. Qi;Y. Zhang;Dan Yang;J. Odhiambo
中国西部青藏高原东部阿坝剖面土壤有机氯农药浓度及土壤-空气交换
影响因子：
2
作者：
Liu, Hongxia;Qi, Shihua;Yang, Dan;Hu, Ying;Li, Feng;Liu, Jia;Xing, Xinli
通讯作者：
Xing, Xinli
DOI：
10.1594/pangaea.838011
发表时间：
2010-11
期刊：
--
影响因子：
--
作者：
Rong Wang;S. Tao;Bin Wang;Yu Yang;C. Lang;Yanxu Zhang;Jing Hu;Jianmin Ma;H. Hung
通讯作者：
Rong Wang;S. Tao;Bin Wang;Yu Yang;C. Lang;Yanxu Zhang;Jing Hu;Jianmin Ma;H. Hung
影响因子：
5
作者：
Gocht, Tilman;Klemm, Otto;Grathwohl, Peter
通讯作者：
Grathwohl, Peter
影响因子：
11.4
作者：
Jiu-jiang Sheng;Xiaoping Wang;P. Gong;D. Joswiak;L. Tian;T. Yao;K. Jones
通讯作者：
Jiu-jiang Sheng;Xiaoping Wang;P. Gong;D. Joswiak;L. Tian;T. Yao;K. Jones