通过在膜制备过程中引入两性离子N-乙基胺哌嗪丙基磺酸盐（AEPPS）制备高性能卤水处理纳滤膜。当AEPPS添加量为0.3%时，纳滤膜对MgSO₄脱除率达到99.79%，通量为40.13 L/（m²·h），CaCl₂脱除率为88.68%，通量为42.12 L/（m²·h），综合性能最佳。卤水处理工程化应用结果表明，所制备纳滤膜对Ca²⁺、Mg²⁺脱除率分别达到84%、95%，同比优于国外竞品膜的75%、92%，两者系统产水量相当，在同类行业中具有明显的技术和成本优势。

High performance nanofiltration membranes for brine treatment are prepared by adding ethyl aminopiperazine propyl sulfonate (AEPPS), a kind of zwitterionic, in aqueous solution during the preparation of membranes.As the addition of AEPPS is 0.3%, the membrane can remove 99.79% of MgSO₄ with a flux of 40.13 L·m^-2·h^-1, and remove 88.68% of CaCl₂ with a flux of 42.12 L·m^-2·h^-1.As the prepared nanofiltration membranes are applied in actual brine treatment systems, the removal rates of Ca²⁺ and Mg²⁺ reach 84% and 95%, respectively, compared with 75% and 92% by the imported membranes.Moreover, the system using the prepared membranes presents a similar permeation flux with that using the imported membranes, showing significant competitive advantages in the case of technology application and operation cost.

郎丰国(1970-),男,学士,工程师,主要从事卤水处理工程化应用研究,13656462927@163.com