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2009年8月~2010年7月,每月在长江口徐六泾对水中悬浮颗粒物进行了采样,分析悬浮颗粒物中有机碳及黑碳含量,研究它们的季节变化特征,并计算出相应的输送通量。结果显示,水体中颗粒有机碳(Particulate organic carbon,POC)含量在0.34~0.92mg/L,黑碳(Black carbon,BC)含量在0.035~0.096mg/L;POC含量与水中总悬浮颗粒物(Total suspended material,TSM)含量有显著的正相关,但POC%随着TSM浓度的增加而减小;此外,水体中BC含量与人类的燃烧活动密切相关。观测期间长江的POC通量为2.34×106 t/yr,BC通量为2.77×105 t/yr,且BC通量占到颗粒有机碳通量的12.9%。
From August 2009 to July 2010, the suspended particulate matter in the water was sampled monthly at the Xu River in the Changjiang Estuary to analyze the contents of organic carbon and black carbon in the suspended particulates, and to study their seasonal variation characteristics and to calculate the corresponding transport Flux. The results showed that the contents of Particulate organic carbon (POC) in water ranged from 0.34 to 0.92 mg / L and the contents of BC from 0.035 to 0.096 mg / L. The contents of POC and total suspended solids suspended material (TSM) content, but POC% decreased with the increase of TSM concentration. In addition, BC content in water was closely related to human combustion activity. During the observation period, the POC flux of the Yangtze River was 2.34 × 106 t / yr, the BC flux was 2.77 × 105 t / yr, and the BC flux accounted for 12.9% of the particulate organic carbon flux.