| Effect of Sediment Motion Patterns on Sorption of Cadmium Ions by Sediment Particles |
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| 引用本文： | HUANG Suiliang,Associate Professor,Dr.,Water Environment Simulation Laboratory,State Key Joint Laboratory of Environmental Simulation and Pollution Control,Beijing Normal University,Beijing,100875 WAN Zhaohui Professor,Dr.,Department of Sedime. Effect of Sediment Motion Patterns on Sorption of Cadmium Ions by Sediment Particles[J]. 国际泥沙研究, 1997, 0(3) |
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| 作者姓名： | HUANG Suiliang Associate Professor Dr. Water Environment Simulation Laboratory State Key Joint Laboratory of Environmental Simulation and Pollution Control Beijing Normal University Beijing 100875 WAN Zhaohui Professor Dr. Department of Sedime |
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| 作者单位： | HUANG Suiliang，Associate Professor，Dr.，Water Environment Simulation Laboratory，State Key Joint Laboratory of Environmental Simulation and Pollution Control，Beijing Normal University，Beijing，100875 WAN Zhaohui Professor，Dr.，Department of Sedime |
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| 摘 要： | I.INTRODUCTIONThefateofmanytraceheavymetalsinnaturalwatersis,toalargeextent,controlledbysorptionprocessesandthedynamicsoftheparticlesthemselves.Thepotentialinfluencesofenvironmentalvariablessuchastemperature,CaZ+,Na+andCI--,dissolvedorganiccarbonandPHvaluesontraceheavymetalpartitioninghavebeenwidelyinvestigated.Forexample,StumnandMorgan(1981)suggestthattheextentofsorptionvariespositivelywithtemperature.Itfollowsthatdecreasedsorptionmightbeexpectedatlowtemperatures,e.g.duringwintermont…
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Effect of Sediment Motion Patterns on Sorption of Cadmium Ions by Sediment Particles |
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| HUANG Suiliang,Associate Professor,Dr.,Water Environment Simulation Laboratory,State Key Joint Laboratory of Environmental Simulation and Pollution Control,Beijing Normal University,Beijing, WAN Zhaohui Professor,Dr.. Effect of Sediment Motion Patterns on Sorption of Cadmium Ions by Sediment Particles[J]. International Journal of Sediment Research, 1997, 0(3) |
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| Authors: | HUANG Suiliang Associate Professor Dr. Water Environment Simulation Laboratory State Key Joint Laboratory of Environmental Simulation Pollution Control Beijing Normal University Beijing WAN Zhaohui Professor Dr. |
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| Affiliation: | HUANG Suiliang,Associate Professor,Dr.,Water Environment Simulation Laboratory,State Key Joint Laboratory of Environmental Simulation and Pollution Control,Beijing Normal University,Beijing,100875 WAN Zhaohui Professor,Dr.,Department of Sedime |
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| Abstract: | Effects of flow turbulence, sediment supply conditions and sediment motion patterns on sorption of Cadmium ions by sediment particles have been studied both in a static experiment and in a device, in which turbulence was generated by a harmonically vibrating set of grids. The result indicates that the sediment motion pattern has no effect on the characteristic parameters in the adsorption isotherm, that is, the saturated adsorption content by unit weight of sediment and the constant of sorption -desorption rate in the Langmuir absorption isotherm. But it has a significant effect on the coefficient of sorption rate (or the coefficient of desorption rate) in the adsorption dynamics. If turbulent intensity of now is low and all sediment exists as bottom mud, the coefficient of sorption rate of sediment (or the coefficient of desorption rate of sediment) is very little, thus the descending rate of Cadmium concentration in the water phase is little. If the turbulent intensity of flow is high, whether sediment exists on the bed or not greatly influences the variation of Cadmium concentrations in the water phase. If the sediment on the bed could be lifted up, the descending rate of Cadmium concentration in the water phase is large. In other words, the coefficient of sorption rate (or the coefficient of desorption rate) by unit weight of suspended sediment is much larger than that by unit weight of bottom mud. |
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| Keywords: | Turbulent intensities Sediment supply conditions Cadmium ions Sorption |
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