The water quality of the rainwater is obviously different from that of the groundwater after it reaches the surface and passes through the vadose zone. This study aims to further evaluate and analyze how soil CO₂ changes under natural conditions, to provide a theoretical background for the establishment of CO₂ geological storage, and to provide a basis for the detection of CO₂ leakage in order to provide insights for expanding CO₂ research. The changes in soil CO₂ concentration under different conditions were simulated and analyzed by laboratory experiments, and the effects of CO₂ on water chemical composition were also analyzed. In this study, two experimental groups (vegetation group (V) and high-temperature sterilization group (R)) and one blank group (B) were established. The results showed that the CO₂ concentration in column R was the lowest, while that in column V was the highest. With rainfall infiltration, soil CO₂ concentration gradually increased. When the rainwater infiltrated to 215 cm, the CO₂ concentrations in the columns V, B, and R were 5100 mg·m⁻³, 4450 mg·m⁻³, and 32,000 mg·m⁻³, respectively. At infiltration depths from 5 to 215 cm, the Na⁺, Ca²⁺, Mg²⁺, SO₄²⁻, and HCO₃⁻ concentrations in columns V and B decreased, whereas they increased in soil column R. The simulation revealed that the CO₂ concentration ranged from 560 mg·m⁻³ to 50,000 mg·m⁻³; pH value decreased; NO₃⁻ and Cl⁻ remained stable; SO₄²⁻ decreased; and fCO₂, HCO₃⁻, Ca²⁺ and Mg²⁺ increased.

雨水到达地表并经过渗流区后，其水质明显不同于地下水。本研究旨在进一步评估和分析土壤CO ₂在自然条件下的变化，为建立CO ₂地质储藏提供理论背景，并为检测CO ₂泄漏提供基础，从而为扩展CO ₂提供参考。 CO ₂研究。通过室内实验模拟分析了不同条件下土壤CO ₂浓度的变化，以及CO ₂的影响。对水的化学成分也进行了分析。在这项研究中，建立了两个实验组（植被组（V）和高温杀菌组（R））和一个空白组（B）。结果表明，R列中的CO ₂浓度最低，而V列中的CO ₂浓度最高。随着降雨的渗透，土壤CO ₂浓度逐渐增加。当雨水渗透到215厘米，CO ₂浓度中的列V，B，和R分别为5100毫克·米^-3，4450毫克·米^-3，32,000毫克·米^-3，分别。在渗透深度为5至215 cm时，Na ⁺，Ca 2 ⁺，Mg 2 ⁺，SO₄ ^2-，和HCO ₃ ^-的浓度列V和乙下降，而它们在土壤中的R.增加仿真揭示，将CO ₂浓度为560毫克·^米-3至50,000毫克·^米-3 ; pH值降低；NO ₃ ^-和Cl ^-保持稳定; SO ₄ ^2-减少；和宽fCO ₂，HCO ₃ ^- ，钙²⁺和Mg ²⁺增加。