热力学建模一种众所周知的凝交叉连接器在砂岩上的吸附行为
Yang Yue1,2, Ayat Hussein Adhab3, Dharmesh Sur4
1School of Mines, China University of Mining and Technology, Xuzhou, 221116, China. yyyycumt@163.com.
Scientific reports
|July 2, 2025
概括
石英和砂岩上的基吸附率随着温度的增加而降低. 兰穆尔模型准确地描述了这一过程,对于优化地下化学处理至关重要.
科学领域:
- 环境化学环境化学
- 表面科学是一门学科.
- 地质化学 地质化学
背景情况:
- 化 (HQ) 是各种工业过程中令人担忧的污染物.
- 了解其在地质介质上的吸附行为对于环境修复至关重要.
- 石英和砂岩是常见的地下材料,影响污染物的命运.
研究的目的:
- 研究基在石英和砂岩表面的吸附特性.
- 为了确定温度对吸附能力和机制的影响.
- 评估不同吸附异热模型的适用性.
主要方法:
- 吸附实验是在不同温度下对石英和砂岩进行的.
- 吸附等温体 (Langmuir, Freundlich,Temkin,线性) 适应了这些数据.
- 进行了热力学分析以确定自发性和能量变化.
主要成果:
- 兰穆尔模型最好地描述了化吸附,表明单层形成 (R2=0.999).
- 石英的最大吸附能力在25°C时为47.1 mg/g,在80°C时降至27.1 mg/g.
- 由于表面异质性,砂岩上的吸附率较低,从25°C的24 mg/g下降到95°C的14 mg/g.
- 吸附是自发的 (ΔG < 0) 和外热的 (ΔH = -8,018 J/mol).
结论:
- 在石英和砂岩上化的吸附取决于温度和外热.
- 与石英相比,砂岩的表面异质性显著降低了吸附能力.
- 这些发现有助于设计有效的化学处理方法,以去除地下污染物.
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