摘要
采集海河干流三岔口至二道闸段张家嘴、赵北渡、邢家圈和大郑村4处的柱状沉积物,测定了不同深度沉积物中总磷及各形态磷的含量,并对其进行了相关性分析.结果表明:海河干流柱状沉积物总磷(TP)、可交换态磷(Ex-P)、铁铝磷(Fe/Al-P)、钙磷(Ca-P)和残渣态磷(Res-P)含量分别在487.2～1265.9,12.6～61.8,36.3～410.5,409.0～634.1,48.0～261.2mg/kg范围内,Ca-P和Res-P含量之和占总磷的80%以上;除个别深度外,总磷及各形态磷含量大体上随深度增加呈逐渐下降趋势;总磷、各形态磷之间相关性显著(p<0.001).磷释放预测结果表明,海河干流表层沉积物可释放约(41.8±10.5)t的活性磷,将造成上覆水磷浓度增加3.1mg/L.
Core sediment sampler was used to collect sediments from the reach of Sanchakou to Erdaozha of Haihe River mainstream,and the contents of total phosphorus（TP）and other fractions of phosphorus in different depths of sediment cores were examined.Correlations between the total phosphorus and other fractions of phosphorus were analyzed.The results showed that contents of total phosphorus,exchangeable phosphorus,iron and aluminum bound phosphorus,calcium bound phosphorus and residue phosphorus were in the range of 487.2-1 265.9,12.6-61.8,36.3-410.5,409.0-634.1,48.0-261.2mg/kg,respectively.Furthermore,it was found that the sum of contents of calcium bound phosphorus and residue phosphorus exceeded 80% of the total phosphorus.Contents of total phosphorus and other phosphorus fractions in the sediments tended to decrease with increasing depth mostly except at some depths.The correlation of different fractions phosphorus is pretty good（p0.001）.Lastly,it was evaluated that the content of phosphorus released possibly from sediments can reach（41.8±10.5）t,and the increment of the phosphorus concentration was thus about 3.1mg/L to the water body.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2010年第5期551-556,共6页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金(51079068)
国家水体污染控制与治理重大专项基金(2008ZX07314-005-011
2009ZX07209-001)
水利部公益性行业科研专项基金资助项目(200801135)
天津市科技支撑计划重点项目(09ZCGYSF00400)
中国水利水电科学研究院开放基金资助项目
关键词
海河干流
柱状沉积物
磷形态
分布特征
Haihe River mainstream
core sediments
fractions of phosphorus
distribution characteristics
