文献类型：期刊文献

英文题名：Integrated electrostatic exclusion and electrosorption in a tubular nanoporous membrane cathode with an internal packed bed for simultaneous removal of cations and anions

作者：Ma, Jing[1];Wang, Chun[2];Wei, Wei[3];Qin, Guotong[1];Jing, Chaojie[1];Liu, Shaomin[4];Jiang, Lei[5]

第一作者：Ma, Jing

通讯作者：Qin, GT[1]

机构：[1]Beihang Univ, Sch Mat Sci & Technol, Shahe Campus, Beijing 102206, Peoples R China;[2]Sichuan Acad Ecoenvironm Sci, Chengdu 610041, Peoples R China;[3]Beijing Union Univ, Coll Biochem Engn, 18 Sanqu Fatouxili, Beijing 100023, Peoples R China;[4]Great Bay Univ, Ctr Sustainabil Sci & Technol, Sch Engn, Dongguan 523000, Peoples R China;[5]Beihang Univ, Sch Chem, Shahe Campus, Beijing 102206, Peoples R China

第一机构：Beihang Univ, Sch Mat Sci & Technol, Shahe Campus, Beijing 102206, Peoples R China

通讯机构：[1]corresponding author), Beihang Univ, Sch Mat Sci & Technol, Shahe Campus, Beijing 102206, Peoples R China.

年份：2026

卷号：412

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20263221263747);Scopus(收录号：2-s2.0-105046614662);WOS:【SCI-EXPANDED(收录号:WOS:001844447700001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 52370062, 52000006, 52070009, 51772031) , the Fundamental Research Funds for the Central Universities (Grant No. 501QYJC2025101001) and the China Postdoctoral Science Foundation (Grant No. 2020TQ0026) .

语种：英文

外文关键词：Dual-function ion removal; Electrostatic repulsion; Electrosorption; Desalination; Nanopore carbon membrane; Activated carbon packed bed

摘要：Nanofiltration membranes are efficient for desalination but are limited by concentration polarization. We report an integrated electrochemical reactor comprising a tubular nanoporous carbon membrane (CM) and an internal activated carbon packed bed reactor (PBR) that simultaneously achieves co-ion exclusion and counter-ion electrosorption under a single applied cathodic potential. The system achieves Na2SO4 rejection above 99% at an inlet concentration of 500 mg L- 1 under -0.4 V vs. SCE, and maintains rejection above 90% over 30 chargedischarge cycles. The 5.6 nm pore geometry of the CM concentrates the local electric field at the pore entrance, imposing strong Donnan repulsion against co-ions (SO42- , Cl-). The same cathodic field activates electrosorption of counter-ions (Na+, Ca2+) across both the CM pore wall and the PBR, where the high specific surface area of activated carbon provides abundant adsorption sites. The integrated tubular configuration ensures that anions and cations are simultaneously removed within a single cathodic compartment. Finite element analysis confirms that SO4 2-rejection is completed within 1.5 nm of the channel entrance, while Na+ electrosorption extends across the CM pore wall. This dual-mechanism strategy under a single electric field offers a scalable platform.