【摘要】 通过对武汉南湖5个柱状底泥样品分析,发现有机质、总氮和总磷垂直分布规律为随泥样深度增加含量下降,上层底泥污染物含量最高,40 cm以下污染物含量渐趋稳定;幸福村排污口附近的柱样各污染物含量要高于其它样点。通过对12个上覆水样和12个间隙水样pH值、总氮、总磷、氨氮的测定,发现就空间分布而言,上覆水总氮和氨氮各样点之间差别不大而总磷差别较大,间隙水总氮总磷氨氮均呈现排污口附近污染物含量高于其它各样点;间隙水和上覆水相比,总氮和氨氮含量高而总磷含量低,表明底泥中总氮和氨氮有向上覆水中静态释放的潜力,而总磷静态释放的可能性不大。更多还原

【Abstract】 Five samples of sediment columns in Nanhu Lake of Wuhan were collected and analyzed,the results showed that the concentration of Organic Matter(OM)、Total Nitrogen(TN) and Total Phosphorus(TP) decreased along depth and stabilized gradually under 40 cm,with the maximum appearing in the top sediment;the contaminants content in the sediment column near Xingfucun sewage outlet were the highest.The value of pH、TN、TP and Ammonium-Nitrogen(NH+4-N) in overlying water and pore water were tested.The results showed that in horizontal distribution the concentrations of TN and NH+4-N were similar but TP varied distinctively for overlying water,TN、TP and NH+4-N content in pore water near Xingfucun sewage outlet are the highest;the concentrations of TN and NH+4N are higher and TP are less in pore water than that in overlying water,which mean that TN and NH+4-N in sediment could release into water and TP couldn’t.更多还原