| 影响土壤中二氧化碳浓度分布的因素分析 |
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| 引用本文： | 关笑坤,王蓉.影响土壤中二氧化碳浓度分布的因素分析[J].地下水,2014(3):18-20. |
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| 作者姓名： | 关笑坤 王蓉 |
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| 作者单位： | 长安大学环境科学与工程学院/旱区地下水文与生态效应教育部重点实验室,陕西西安710054 |
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| 摘 要： | 探究CO2地质储存泄露的安全性问题，研究CO2在土壤包气带中浓度分布的影响因素。用不同浓度的CO2气体输入试验筒中，并监测土壤中CO2浓度，将测量结果与温度及土壤含水率变化曲线对比。结果表明，输气速度不变情况下，土壤中CO2浓度变化较小，基本保持平衡，由深到浅 CO2浓度依次降低，不同浓度试验组的CO2气体的浓度小幅变化与日温变化规律相同；土壤中CO2浓度大小的对含水率基本无影响，但雨水入渗增大了土壤含水率，CO2浓度较原来相比有所上升，在土壤深约1．5 m处形成一个较小的峰值。
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| 关 键 词： | CO2地质储存 土壤包气带 含水率 温度 |
Study on the Factors Affecting Carbon Dioxide Concentration Variations in the Soil |
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| Guan Xiaokun,Wang Rong.Study on the Factors Affecting Carbon Dioxide Concentration Variations in the Soil[J].Groundwater,2014(3):18-20. |
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| Authors: | Guan Xiaokun Wang Rong |
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| Institution: | ( Key Laboratory of Groundwater Geology and Ecological Effect in Drought Regions, Ministry of Education/School of Environmental Science and Engineering, Chang＇an University, Xi＇an 710054, Shaanxi) |
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| Abstract: | Because of the safety problem of CO2 geological storage which is attributed to the possibility of CO2 leakage, the paper makes a study on the factors affecting the carbon dioxide concentration variations in the vadose zone .Researchers in-ject CO2 into test tubes constantly and record the CO2 concentration in the soil, which is compared with temperature variations and soil moisture variations then.The comparison results show that CO2 concentration in the soil changes little when CO2 is in-jected with a stable speed and variations of it is always keeping pace with natural temperature variations .From the bottom to the surface, concentration decrease little by little.Variations of CO2 concentration in the soil has little influence on soil mois-ture.Moreover, increase of soil moisture, which is cause by rainfall infiltration, leads to the increase of CO2 concentration, which reaches a peak when in a 1.5m depth. |
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| Keywords: | CO2 geological storage vadose zone soil moisture temperature |
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