水科学进展2013，Vol.24Issue(4)：537-542,6.
泥沙污染物起动再悬浮释放机理
Mechanism of pollutant release due to sediment re-suspension
摘要
Abstract
During the process of pollutants release due to sediment re-suspension,particles and pore water alternately affect the release flux to the overlying water.Conservative tracer (NaCl) and reactive tracer (Phosphorus) were respectively used as the contaminants to characterize the different ways of particles and pore water under hydrodynamic conditions in a laboratory flume.Studies have shown that reactive tracer responded more slowly to the bed shear stress than the conservative tracer did.Pollutants release process under constant flow can be divided into two significant stages:The suspended particles were in the desorption state during the first two hours,the ratio of water-soluble pollutants contribution between particles and pore water got a maximum values of 3:1.After two hours,the particles begun to adsorb contaminants instead,and the contribution rate of the particles was always negative while pore water's contribution rate peak reached 60∶1.The partition coefficient of pollutants first increased and then stays low,and the reactive pollutants mainly made an impact on water quality in the form of particular.Comparing derived formulas with the experimental dates,the theoretical result increased linearly while the increasing trend of experimental one is slow after the first rapid increment.关键词
底泥污染物/再悬浮颗粒/孔隙水/释放通量/液固浓度比Key words
sediment pollutants/ suspended particle/ pore water/ release flux/ partition coefficient分类
建筑与水利引用本文复制引用
朱红伟,蒋基安,程鹏达,王道增..泥沙污染物起动再悬浮释放机理[J].水科学进展,2013,24(4):537-542,6.基金项目
国家自然科学基金资助项目(10972134 （）
11032007) （）
The study is financially supported by the National Natural Science Foundation of China(No.10972134 （）
No.11032007). （）
