School of Urban Development, Queensland University of Technology, GPO Box 2434, Brisbane QLD 4001, Australia.
Environ Pollut. 2010 Sep;158(9):2848-56. doi: 10.1016/j.envpol.2010.06.015. Epub 2010 Jul 13.
This paper reports the distribution of Polycyclic Aromatic Hydrocarbons (PAHs) in wash-off in urban stormwater in Gold Coast, Australia. Runoff samples collected from residential, industrial and commercial sites were separated into a dissolved fraction (<0.45 microm), and three particulate fractions (0.45-75 microm, 75-150 microm and >150 microm). Patterns in the distribution of PAHs in the fractions were investigated using Principal Component Analysis. Regardless of the land use and particle size fraction characteristics, the presence of organic carbon plays a dominant role in the distribution of PAHs. The PAHs concentrations were also found to decrease with rainfall duration. Generally, the 1- and 2-year average recurrence interval rainfall events were associated with the majority of the PAHs and the wash-off was a source limiting process. In the context of stormwater quality mitigation, targeting the initial part of the rainfall event is the most effective treatment strategy. The implications of the study results for urban stormwater quality management are also discussed.
本论文报告了澳大利亚黄金海岸城市雨水冲刷物中多环芳烃（PAHs）的分布情况。从住宅、工业和商业场所采集的径流样本被分为溶解部分（<0.45 微米）和三个颗粒部分（0.45-75 微米、75-150 微米和>150 微米）。使用主成分分析研究了各部分中 PAHs 的分布模式。无论土地利用和颗粒大小分布特征如何，有机碳的存在在 PAHs 的分布中起着主导作用。还发现 PAHs 浓度随降雨持续时间的延长而降低。一般来说，1 年和 2 年平均重现期降雨事件与大多数 PAHs 有关，冲刷是一个限制源的过程。在雨水水质缓解的背景下，针对降雨初期是最有效的处理策略。本研究结果对城市雨水水质管理的意义也进行了讨论。
