Impact of salinity fluctuation on partitioning behavior of pollutants at water-sediment interface
Due to the dual actions of runoff and tidal currents,seawater intrusion often occurs in the estuary of the Yangtze River,and there is a long-term phenomenon of"saltwater flows upstream from the North Branch to the South Branch"particularly in the dry season.Therefore,salinity is an important factor affecting the water quality of water source area.In order to ensure the safety of source water and accurately predict the alteration in its water quality,the influence of salinity and waterflow disturbance on water-sediment partitioning behavior of ammonia nitrogen(NH3-N)and total phosphorus(TP)was herein studied.Our results indicate that,for NH3-N,both turbulence intensity and salinity can increase the sorption on sediment,and the impact of salinity outweighed that of flow turbulence;when the salinity is too high,the water-sediment distribution coefficient shows an obviously restraining trend with the increase of disturbance intensity.For TP,the individual effects of both factors could not be clearly identified and delineated simultaneously.When salinity is the major factor,the effect of flow disturbance intensity on sorption of analytes on sediments can be ignored,and vice versa.
NETL
NSTL
万方数据
