Distribution, input pathway and soil-air exchange of polycyclic aromatic hydrocarbons in Banshan Industry Park, China.
Distribution, input pathway and soil-air exchange of polycyclic aromatic hydrocarbons in Banshan Industry Park, China.
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DOI：
10.1016/j.scitotenv.2012.11.091
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发表时间：
2013-02
期刊：
影响因子：
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通讯作者：
Yuchi Zhong;Lizhong Zhu
中科院分区：
文献类型：
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作者：
Yuchi Zhong;Lizhong Zhu
针对我国钢铁工业园区普遍存在的“园-城”结构及其带来的环境污染问题，研究了半山钢铁工业园区多环芳烃（PAHs）的时空分布特征以及主要流入途径的相对贡献.采用气相色谱-质谱联用仪（GC-MS）分析了土壤、大气、水体和干/湿沉降物中16种多环芳烃的含量。2010年4月∑16-PAHs浓度范围为572 ~ 4654μg/kg，平均浓度分别比2009年4月和2008年4月高12.7%和26.1%，主要是由于高毒性高分子量多环芳烃的快速增加。高分子量和低分子量多环芳烃的主要输入途径被确定为干沉降（例如，苯并[a]芘为69.73%）和湿沉降（例如，78.87%（萘）。总的来说，在该地区发现的总多环芳烃的54.79%是通过干沉降，而湿沉降和河水灌溉贡献25.46%和19.76%（校正与毒性当量因子）。通过计算土壤和空气样品之间的逸度系数来评估土壤-空气平衡的方法，结果表明，土壤作为轻分子量大气多环芳烃的次级源和高分子量多环芳烃的汇。它还确定，土壤作为一个来源的中分子量多环芳烃，特别是PY。
Given the steel industry park–city paired structure commonly found across China and it associated environmental pollution, the objective of this study was to examine the spatial–temporal distributions of polycyclic aromatic hydrocarbons (PAHs) as well as the relative contributions of the main influx pathways in Banshan steel industry park, China. We analyzed the concentrations of 16 PAHs in soil, air, water and dry/wet deposition samples using gas chromatography–mass spectrometry (GC–MS). The concentrations of ∑16-PAHs ranged from 572 to 4654μg/kg in April 2010; and the average concentration is 12.7% and 26.1% higher than that of April 2009 and April 2008, respectively, mainly due to the rapid increase of highly toxic high molecular weight (MW) PAHs. The principal input pathway for high and low MW PAHs was determined to be dry deposition (e.g., 69.73% for Benzo[a]pyrene) and wet deposition (e.g., 78.87% for Naphthalene), respectively. Together, 54.79% of total PAHs found in this region are via dry deposition, whereas wet deposition and river water irrigation contribute to 25.46% and 19.76% (corrected with toxic equivalency factors). The approach to the soil–air equilibrium was assessed by calculating fugacity quotients between soil and air samples, and the results indicate that the soil acted as a secondary source for light MW atmospheric PAHs and a sink for higher MW PAHs. It was also determined that the soil acted as a source for median MW PAHs, particularly PY.