土壤无机离子对CO2封存泄漏的响应
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国家高技术研究发展计划燃煤电厂烟气CCUS关键技术3级子课题"CO2泄漏风险的近地表与地面监测技术"(2012AA050103-4)


Response of Soil Inorganic Ions to Carbon Dioxide Leakage
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    摘要:

    [目的] 旨在研究土壤中无机离子含量对CO2封存泄漏的响应。[方法] 在CO2人工气候箱中分别种植绿豆、荞麦两种作物,模拟10000,20000,40000和80000μl/L这4个浓度梯度,外加一个空白浓度对照组,观测土壤无机离子含量变化及作物生长情况。[结果] 随着大气中CO2浓度升高,土壤中的Cl-,K+,Ca2+含量基本先降后升,SO42-呈现先升后降再升再降的M型变化趋势,Na+,Mg2+,HCO3-变化不显著,而CO32-始终未检出。绿豆、荞麦的光合速率及生物量均在CO2浓度10000μl/L时达到最大。[结论] 大气中CO2浓度升高一方面会直接影响土壤溶液酸碱度、碳平衡,发生离子沉淀;另一方面还会影响作物和微生物生长,改变其对土壤离子的吸收和代谢。

    Abstract:

    [Objective] This research focuses on the response of soil inorganic ions to CO2 leakage.[Methods] We grew two crops including buckwheat (Fagopyrum esculentum) and mung beans (Vigna radiate)in the artificial climate box with five simulated CO2 concentration gradients of 0 (control group), 10 000, 20 000, 40 000, 80 000 μl/L, to observe the variations of soil inorganic icons and plant growth.[Results] With the increase of CO2 concentrations, Cl-, K+, Ca2+ decreased firstly and then increased. The trend of SO42- exhibited as an "M" shape pattern, while variations in Na+, Mg2+ and HCO3- were not significant. No carbonate (CO32-) was found during the testing. Photosynthetic rate and biomass of buckwheat and mung beans were the maximum when the concentration of CO2 reached 10 000 μl/L.[Conclusion] Increases in the concentration of CO2, can influence the pH value and carbon balance of the soil, and result in the precipitation of ions. In addition, the rise in CO2 concentration affects the growth of crops and microbial activity, and changes the absorption and metabolism to soil ions.

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陈妮,马俊杰,华雯,李晓春,邵强.土壤无机离子对CO2封存泄漏的响应[J].水土保持通报,2015,35(1):37-41

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  • 收稿日期:2014-03-22
  • 最后修改日期:2014-04-23
  • 在线发布日期: 2016-04-05