摘要
通过对鸭绿江口潮滩区 2个采样点采集的柱状样分析、培养实验 ,测定了沉积物间隙水中的营养盐和沉积物中的S2 - .结果表明 ,鸭绿江口潮滩区沉积物间隙水中的NO- 3含量平均值为 3 0 μmol/L ,垂直分布变化不大 .PO3- 4和SiO2 - 3的含量范围分别为 0 8～ 70 4μmol/L ,1 1 1 6～ 1 0 5 4 3 μmol/L ,且两者垂直变化类似 ,随沉积物深度的增加先增加后下降 .沉积物中硫化物的分布是随深度增加 ,含量升高 .鸭绿江口潮滩区沉积物Eh、pH的测定结果显示 ,在 1 3cm以下 ,Eh降为负值 ,沉积物还原性逐渐增强 .而 pH自上而下变化不大 .由分子扩散公式计算结果表明 。
The concentrations of NO - 3、PO 3- 4 and SiO 2- 3 in sediment pore waters from tidal flat area in Yalujiang Estuary were determined. The concentration of NO - 3 in sediment pore waters was almost stable, the average NO - 3 was 3 0μmol/L. The concentration of PO 3- 4 and SiO 2- 3 were 0 8～70 4μmol/L and 111 6～1054 3μmol/L, respectively. The depth distribution of PO 3- 4 and SiO 2- 3 increased with depth at first and then decreased further down. The content of S 2- in sediment raise with depth. Under the depth of 13cm,Eh decreased into minus. pH did not obviously change with depth. The diffusion of nutrients in tidal flat area in Yalujiang estuary was from pore water into overlying water.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2002年第3期92-96,共5页
Environmental Science
基金
国家基础研究发展规划项目 (G19990 4 370 5 )
国家杰出青年基金项目 (495 2 5 6 0 9)
山东省自然科学基金项目 (Y98E0 6 0 77)
关键词
鸭绿江口
潮滩区
沉积物
间隙水
氮
磷
硅
Yalujiang estuary
tidal flat sediment
pore waters
nitrogen
phosphate
silicon
