The Application of~3H and ~(90)Sr Tracer in Soil Aerated Zone Tracing Experiment
-
摘要: 本工作测定了土壤包气层中 3 H和 90 Sr在天然条件和人工喷淋条件下的扩散系数, 并研究了 3 H和 90 Sr示踪剂在黄土包气层中的迁移行为。结果表明, 在华北地区黄土高原天然条件下, 包气层中氚示踪剂以 0.0 3cm/d速度迁移, 纵向扩散系数 Dx 为 0.5 2 cm2 /d;在 2 m× 2 m实验坑中, 以 5 mm/h喷淋强度每天喷淋 3h的条件下, 氚示踪剂以 2.2 7cm/d的速度向下迁移, 纵向扩散系数 Dx 为 7.75cm2 /d。包气层中天然条件下 90 Sr基本没有迁移;人工喷淋条件下, 90 Sr以 3.7× 10 -3 cm/d速度迁移, 纵向扩散系数 Dx 为 0.0 3m2 /dAbstract: Diffusivity of 3H and 90 Sr are measured in soil aerated zone on both natural condition and artificial rainfall condition The migration regularity of 3H and 90 Sr are studied in loess aerated zone at the same time. The results show that the migration velocity of 3H tracer in aerated zone is 0.03 cm/d on natural condition in loess plateau of Huabei Region, the vertical diffusivity D x is 0.52 cm 2/d; In the experiment pit, the migration of 3H is 2.27 cm/d on artificial rainfall condition(the sprinkling intensity is 5 mm/h, 3 hours each day), the vertical diffusivity D x is 7.75 cm 2/d. The 90 Sr tracer in aerated zone haven't migrated, the migration velocity is 3.7×10 -3 cm/d, the vertical diffusivity D x is 0.03 cm 2/d.
-
Keywords:
- H /
- 90 Sr /
- soil aerated zonetracing experiment
-
-
[1] VidalM,RauretG.AsequentialExtractionScheme toAscertain theRole ofOrganicMatterinRadionuclideRetentioninMediterraneanSoils[J].Journal ofRadioanalytical andNuclearChemistry,1993,173(1):79～86. [2] VidalM,TentT,LiauradoM,etal.Study ofEvolutionRadionuclideDistribution inSoilUsingSequentialExtractionSchems[J].Journal ofRadioecology,1993,(1):49～55. [3] TriayIR,RobinsonBA,LopeaRM,et al.NeptuniumRetardationWithTuffs andRoundwatersFromYuccaMountain[A].InternationalHigh-levelRadioactiveWasteManagementConference[C].LasVegas,Nevada:LosAlams notionalLabortary.April26～30,1993. [4] FuruyaH.Migration ofCesium,Strontium andCobalt inWater-SaturatedInadaGranite[J].Journal ofNuclearScience andTechnology,1992,29(5):454～460
计量
- 文章访问数: 574
- HTML全文浏览量: 0
- PDF下载量: 873
下载:
