Zhao Yu, Shan Bao-Qing, Zhang Wen-Qiang, Wang Chao
Huan Jing Ke Xue. 2014 Jan;35(1):143-9.
In order to research the spatial distribution characteristics and pollution condition of nitrogen in water and sediment, the Ziya River Basin was selected as the study area. The results showed: the average TN concentration of all water body samples was 31.28 mg x L(-1), which was 15 times higher than the V-class standard of national surface water, where the NH(4+)-N accounted for about 79% of TN ratio, followed by total organic nitrogen (TON). The organic nitrogen was the major form to exist in nitrogenous substances of surface sediment; and the average concentration was 3.290 g x kg-1) which was 4.5 times higher of NH:-N's. In the waters of Ziya River Basin, NH(4+)-N had a significantly positive correlation with TON and t, respectively (P < 0.01); as well as both NH(4+)-N and sediment organic nitrogen(SON) were significantly positively correlated to TOC (P < 0.01) in the surface precipitation. The surface sediment of Ziya River Basin was in the state of organic pollution, and Beili River was in the most serious status. It was worth mentioning that the influence of organic nitrogen pollution was just above the organic carbon's.
为研究水体和沉积物中氮的空间分布特征及污染状况，选取子牙河流域作为研究区域。结果表明：所有水体样本的总氮（TN）平均浓度为31.28mg·L⁻¹，是国家地表水Ⅴ类标准的15倍，其中铵态氮（NH₄⁺-N）约占TN比例的79%，其次是总有机氮（TON）。有机氮是表层沉积物含氮物质的主要存在形态，平均浓度为3.290g·kg⁻¹，是NH₄⁺-N的4.5倍。在子牙河流域水体中，NH₄⁺-N分别与TON和总磷（t）呈显著正相关（P<0.01）；表层沉积物中NH₄⁺-N和沉积物有机氮（SON）均与总有机碳（TOC）呈显著正相关（P<0.01）。子牙河流域表层沉积物处于有机污染状态，北澧河污染最为严重。值得一提的是，有机氮污染的影响略高于有机碳的影响。
