摘要
为了解沿海地区城市停车场内径流携带沉积物的粒径分布及污染特征,于2011年4—6月在韩国西海岸12个不同停车场采集了沉积物样品,分别分析了其粒径分布和各粒径中污染物质的含量.结果表明,不同采样点的废弃物形态差异较大,主要表现在较大的植物茎叶、烟蒂及动物粪便等废弃物和含水率等方面.不同采样点的颗粒物粒径大小不同,其颗粒物的均一性也有所差异.总体来讲,106～500μm之间的颗粒物是径流携带沉积物的主要组成部分,其平均质量分数占总体(<2360μm)颗粒物的59.9%.对不同粒径中污染物质的含量分析得出,颗粒物中污染物质的含量随粒径增大而减小.其中,<106μm的颗粒物中总氮、总磷、COD和挥发性物质的质量分别占各污染物总量的18.9%、17.8%、20.41%和18.9%,而该部分颗粒物本身的平均质量分数只有3.9%.可见<106μm的颗粒物处于高度污染状态.因此,在城市停车场面源污染管理中,应该对该部分高度污染的颗粒物给以足够的重视.对于不同污染特征的颗粒物应该采用不同的去除方法.
Road-deposit sediment samples were collected from twelve parking lots in the urban coastal area of Korea during April-June of 2004.The particle size distribution and concentrations of pollutants including total nitrogen, total phosphorus, chemical oxygen demand and volatile solids were analyzed. The sediments collected from different parking lots were distinct from each other and typically included contents of branches, cigarette-ends, animal wastes and water constituents. The particle size distribution and uniformity also differed from site to site. Particles in the range of 106～500 μm contributed to a large portion of the sediments with a mass fraction of 59.9%. Compared with larger particles, the smaller particles were determined as highly polluted. Around 18.9% of total nitrogen, 17.8% of total phosphorus, 20.41% of chemical oxygen demand and 18.9% of volatile solids were associated with particles less than 106μm, which accounted for only 3.9% of the total solids. Thus, more attention should be paid to these particles in managing non-point source pollution in parking lots. In addition, different methods should be employed for the treatment of particles with different sizes.
出处
《环境科学学报》
CAS
CSCD
北大核心
2013年第4期1066-1072,共7页
Acta Scientiae Circumstantiae
基金
中央高校基本科研业务费专项资金(No.11lgpy100)
国家自然科学基金(No.51009156
51002196)
南京信息工程大学科研基金(No.2012X050)~~
关键词
城市停车场
径流沉积物
粒径分布
污染特征
urban parking lots
sediments in runoff
particle size distribution
pollutants contents
