Data repository for manuscript "The Influence of Feedwater pH on Membrane Charge Ionization and Ion Rejection by Reverse Osmosis: An Experimental and Theoretical Study"

The dataset describes both the theoretical and experimental data for desalination of 30 mM NaCl salt solution with BW30HR-440 reverse osmosis (RO) membrane at varying pH. Feedwater pH is varied by acid-base dosing (HCl and NaOH), and gas contol (CO2) techniques. Experimental runs 1-4 are for acid-base dosing whereas runs 5 and 6 are for gas control. The model prediction data is obtained from a one dimensional mass transport model using the extended Donnan-Steric partitioning pore model and coupled with membrane charge ionization description as well as transport of H+ and OH-.

本数据集涵盖了采用BW30HR-440反渗透（reverse osmosis, RO）膜处理30 mM氯化钠盐溶液的脱盐过程在不同pH条件下的理论与实验数据。实验通过酸碱投加（盐酸HCl与氢氧化钠NaOH）以及气体控制（CO₂）技术调节给水pH值，其中实验批次1至4采用酸碱投加方式，批次5与6则采用气体控制技术。模型预测数据基于采用扩展唐南-空间位阻分配孔模型（extended Donnan-Steric partitioning pore model）的一维传质模型得到，该模型耦合了膜电荷电离描述以及氢离子（H+）与氢氧根离子（OH-）的传输过程。