Journal of Zhejiang University SCIENCE A is a scientific journal that publishes research on environmental science and engineering. The article discusses the importance of adsorption kinetics in environmental remediation and reviews several widely-used adsorption kinetic models. Adsorption is a common technique for removing pollutants from contaminated media, and its kinetics are crucial for evaluating the performance of adsorbents and understanding the underlying mechanisms. However, many existing models have been used in an inappropriate manner, often ignoring boundary conditions during data modeling. The article reviews several adsorption kinetic models, with a focus on their boundary conditions. It highlights the differences between adsorption reaction models and diffusion models. Adsorption reaction models are based on chemical reaction kinetics and consider the entire adsorption process, while diffusion models consider the diffusion of solutes across the liquid film, within the pores, and between the adsorbate and active sites. The article discusses two main models: the pseudo-first-order rate equation and the pseudo-second-order rate equation. The pseudo-first-order model is based on the assumption that the rate of adsorption is proportional to the difference between the equilibrium and actual adsorption capacities. The pseudo-second-order model is based on the assumption that the rate of adsorption is proportional to the square of the difference between the equilibrium and actual adsorption capacities. The article concludes that the review of these models is of significant importance for improving the current research on adsorption kinetic modeling. It emphasizes the need for proper consideration of boundary conditions and the importance of using appropriate models for accurate data modeling.Journal of Zhejiang University SCIENCE A is a scientific journal that publishes research on environmental science and engineering. The article discusses the importance of adsorption kinetics in environmental remediation and reviews several widely-used adsorption kinetic models. Adsorption is a common technique for removing pollutants from contaminated media, and its kinetics are crucial for evaluating the performance of adsorbents and understanding the underlying mechanisms. However, many existing models have been used in an inappropriate manner, often ignoring boundary conditions during data modeling. The article reviews several adsorption kinetic models, with a focus on their boundary conditions. It highlights the differences between adsorption reaction models and diffusion models. Adsorption reaction models are based on chemical reaction kinetics and consider the entire adsorption process, while diffusion models consider the diffusion of solutes across the liquid film, within the pores, and between the adsorbate and active sites. The article discusses two main models: the pseudo-first-order rate equation and the pseudo-second-order rate equation. The pseudo-first-order model is based on the assumption that the rate of adsorption is proportional to the difference between the equilibrium and actual adsorption capacities. The pseudo-second-order model is based on the assumption that the rate of adsorption is proportional to the square of the difference between the equilibrium and actual adsorption capacities. The article concludes that the review of these models is of significant importance for improving the current research on adsorption kinetic modeling. It emphasizes the need for proper consideration of boundary conditions and the importance of using appropriate models for accurate data modeling.