Distribution Characteristics of Total Nitrogen and Organic Matter and Its Sources in Core Sediments from the Guangzhou Reach of the Pearl River
The vertical distributions of the Total Nitrogen (TN) and Organic Matter (OM) in the core sediments within 50 cm depth in the Guangzhou Reach of the Pearl River were characterized. In all 6 tested sections, the concentrations of TN ranged from 0.91 to 3.55 g·kg-1, with an average of 2.11 g·kg-1 to an abundant level (TN>1.50 g·kg-1). And, the concentrations of OM ranged from 4.51 to 79.69 g·kg-1, with an average of 50.93 g·kg-1, approximately twice of the average OM concentration of Guangdong soils (26 g·kg-1). The TN and OM concentrations in upper layer sediments (0-30 cm) were slightly higher than in lower layer sediments (30-50 cm), but there were not significantly different. These results clearly indicated that the Reach had been heavily polluted by the organic pollutants, and more than 90% samples exceeded the limited OM value (OM< 34 g·kg-1) in the sediments. Positive correlation between concentrations of TN and OM (p<0.01) was found as well as water content and OM, TN. Furthermore, the samples had the relatively high ratio of total organic carbon (TOC) to TN (8-33), which indicated potential sources of OM were mostly from terrestrial sources, and partly from aquatic sources.
Pearl River total nitrogen (TN) organic matter (OM) terrestrial sources aquatic sources Redfield Ratio
LIANG Mingyi WU Wencheng WU Qunhe
South China Institute of Environmental Sciences,ZHB,Guangzhou 510655,Guangdong,China Institute of Environmental Sciences,Sun Yat-sen Universtiy,Guangzhou 510275,Guangdong,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
487-492
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）