The red Pisha sandstone was taken as absorbents to investigate the effects of the solution pH, the adsorption time and temperature adsorption onto Ni (II) absorption by the Pisha sandstone, and used dynamics and thermodynamic absorption models, coupled with microcalorimetry and infrared spectroscopic (FTIR) analysis, and scanning electron microscope-energy dispersive spectrometer (SEM-EDS); it aimed to determine the mechanism of thermodynamics and kinetics for Pisha sandstone absorbing Ni (II). The results indicated that the adsorption was performed at 293 K, pH 7, and the equilibrium was reached at 30 min, and the adsorption capacity of Ni (II) was 23.688 mg/g; the adsorption process of Ni (II) onto Pisha sandstone could be described with the Lagrangian pseudo-second-order kinetic model, the Freundlich model, and Dubinin-Radushkevich (D-R) model which all could well simulate the isothermal properties, indicating that the adsorption process was mainly monolayer with heterogeneous surface. According to the microthermal process and thermodynamic analysis, the thermodynamic parameters of Gibbs free energy change (ΔG), enthalpy change (ΔH), and entropy change (ΔS) were less than zero, showing that the adsorption of Ni (II) onto Pisha sandstone was exothermic, spontaneous, and entropy increasing. The absorptive models, FTIR analysis, and SEM-EDS demonstrated that the Pisha sandstones absorbing Ni (II) were mainly ion exchange and chemical adsorption meanwhile chemical precipitation little partly worked in the processes.

以红色的Pisha砂岩为吸收剂，研究了溶液pH值，Pisha砂岩对镍（II）吸收的吸附时间和温度吸附的影响，并使用了动力学和热力学吸收模型，以及微量热法和红外光谱（FTIR） ）分析和扫描电子显微镜-能量色散光谱仪（SEM-EDS）；它旨在确定Pisha砂岩吸收Ni（II）的热力学和动力学机理。结果表明，在293 K，pH 7下进行吸附，在30 min达到平衡，Ni（II）的吸附容量为23.688 mg / g。Ni（II）在Pisha上的吸附过程拉格朗日拟二阶动力学模型，Freundlich模型和Dubinin-Radushkevich（DR）模型都可以很好地模拟等温性质，说明吸附过程主要是表面非均质的单层。通过微热过程和热力学分析，吉布斯自由能变化（ΔG），焓变（ΔH）和熵变（ΔS）的热力学参数均小于零，表明Pisha砂岩对Ni（II）的吸附。放热，自发和熵增加。吸收模型，FTIR分析和SEM-EDS证明了Pisha 吸收Ni（II）的砂岩主要是离子交换和化学吸附，而化学沉淀在该过程中几乎没有起作用。