Effects of initial water content on solute preferential transport in inter-tidal zone of Yellow River Estuary
It is an important effect on coastal ecological environment that the land-source pollutants transport and absorb in sediments of intertidal zone.Non-adsorption solute nitrate and adsorption solute hypophosphite were chosen as tracers.Indoor experimenty of soil columns were used ta study the effects of initial water contents on non-adsorption and adsorption solute preferential transport in sediments in inter-tidal zone of Yellow River Estuary.The results showed that the sediment macro-pores obviously effects on the preferential flow and solute preferential transport,especially in dry soil.The lower and initial water content was earlier and initial breakthrough,and the higher and peak value of effluent relative concentration ( c/co ), and the higher and mass balance rate.The study on non-adsorption solute nitrate and adsorption solute hypophosphite showed that the higher and initial water content was more interaction between macro pores and matrix,and the better and adsorption effect,especially very obvious adsorption effect on the adsorption solute hypophosphite.The outcome decreased the transportation from land to sea.
macro-poresnon-adsorption solute nitrateadsorption solute hypophosphitesolute preferential transport
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万方数据
维普
