多元组件气体质量转移:哪些因素影响地下水系统中的气体分割?
Madeline M Calvert1, Cole J C Van De Ven1, Dru J Heagle2
1Carleton University, Department of Civil and Environmental Engineering, Ottawa, Ontario K1S 5B6, Canada.
Environmental science & technology
|February 16, 2026
概括
了解地下水中的多元组件气体转移是地下储存和现场清理的关键. 溶解气体的行为偏离了局部平衡假设,需要先进的动力模型来进行准确的模拟.
科学领域:
- 地质科学 地质科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 准确建模地下水中的多元组件气体转移对于地下气体储存,风险评估和整治至关重要.
- 现有的模型通常依赖于局部平衡假设 (LEA),这些假设可能不能准确地代表复杂的气体溶解过程.
研究的目的:
- 调查影响地下水系统中多元组件气体质量转移的参数.
- 在各种实验条件下评估局部平衡假设 (LEA) 的有效性.
主要方法:
- 在充满沙子的柱子中进行一维实验,测量被困气体随着时间的推移而溶解.
- 捕获的气体,颗粒大小和水态速度各不相同.
- 使用ANOVA测试评估质量转移特征,如溶解气体丰富和突破时间.
主要成果:
- 气体组件的分离高度依赖于其他气体组件的存在.
- 观察到的质量转移行为与局部平衡假设 (LEA) 不一致,即使在低水态速度.
- 该LEA速度值是不确定的,需要进一步调查.
结论:
- 在地下水系统中的多元件质量转移是复杂的,并受到气体相互作用的影响.
- 局部平衡假设 (LEA) 不足以准确建模气体溶解和分离.
- 对于精确的模拟,需要采用包含气-水接口面积的动态质量转移模型.
相关概念视频
Physical Principles Governing Gas Exchange
4.1K
Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total...
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total...
4.1K
Physical Properties Affecting Solubility
27.5K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
27.5K
Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion
31.5K
Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
31.5K
Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation
39.4K
Thus far, the ideal gas law, PV = nRT, has been applied to a variety of different types of problems, ranging from reaction stoichiometry and empirical and molecular formula problems to determining the density and molar mass of a gas. However, the behavior of a gas is often non-ideal, meaning that the observed relationships between its pressure, volume, and temperature are not accurately described by the gas laws.
39.4K
Dalton's Law of Partial Pressure
2.7K
The partial pressure of a gas is a measure of the thermodynamic activity of the gas's molecules. The pressure that a gas would create if it occupied the total volume available is called the gas's partial pressure. If two or more gases are mixed together in a container, the molecules move randomly and collide with each other, causing them to reach thermal equilibrium. When the gases have the same temperature, their molecules have the same average kinetic energy. Thus, each gas obeys the...
2.7K
Applications of the Ideal Gas Law: Molar Mass, Density, and Volume
63.7K
The volume occupied by one mole of a substance is its molar volume. The ideal gas law, PV = nRT, suggests that the volume of a given quantity of gas and the number of moles in a given volume of gas vary with changes in pressure and temperature. At standard temperature and pressure, or STP (273.15 K and 1 atm), one mole of an ideal gas (regardless of its identity) has a volume of about 22.4 L — this is referred to as the standard molar volume.
63.7K


