School of Geographic Sciences, Key Laboratory of Geo-information of the Ministry of Education, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China.
Environ Sci Process Impacts. 2017 Apr 19;19(4):561-569. doi: 10.1039/c7em00016b.
Polycyclic aromatic hydrocarbons (PAHs), total organic carbon (TOC) and black carbon (BC) in the estuarine-coastal areas of the East China Sea (ECS) were investigated. The results showed that ∑PAH concentrations ranged from 61 to 355 ng g with a mean value of 146 ng g. The contents of TOC and BC were in the range of 1.31-7.23 mg g and 0.52-5.60 mg g, respectively. Data analyses showed that PAH concentrations had a positive linear relationship with TOC and with BC. In addition, the grain size of silts and clays had significant influence on the PAHs of sediments. These physicochemical properties as well as coastal currents, especially the trapping effect of the Taiwan Warm Current and the Zhejiang Fujian Coastal Current, played important roles in determining the spatial distribution of PAHs in the ECS. The estimated deposition flux of PAHs was 106 t per year in the study area. Source apportionment showed that these PAHs mainly originated from oil sources, and the combustion of liquid fossils and coal/wood.
本研究调查了东海（ECS）河口-近岸地区的多环芳烃（PAHs）、总有机碳（TOC）和黑碳（BC）。结果表明，∑PAH 浓度范围为 61-355ng/g，平均值为 146ng/g。TOC 和 BC 的含量分别在 1.31-7.23mg/g 和 0.52-5.60mg/g 之间。数据分析表明，PAH 浓度与 TOC 和 BC 呈正线性关系。此外，粉砂和粘土的粒径对沉积物中的 PAHs 有显著影响。这些理化性质以及沿岸流，特别是台湾暖流和浙闽沿岸流的截获作用，对东海 PAHs 的空间分布起着重要作用。研究区域内 PAHs 的沉积通量估计为 106t/年。源解析表明，这些 PAHs 主要来源于石油源，以及液体化石和煤/木的燃烧。
