文献类型：期刊文献

英文题名：Integrated electrocatalytic packed-bed membrane reactor for nitrate removal

作者：Ma, Jing[1];Wei, Wei[2];Qin, Guotong[1];Jiang, Lei[3];Wong, Ngie Hing[4];Sunarso, Jaka[4];Liu, Shaomin[5]

第一作者：Ma, Jing

通讯作者：Qin, GT[1]

机构：[1]Beihang Univ, Sch Space & Environm, Shahe Campus, Beijing 102206, Peoples R China;[2]Beijing Union Univ, Coll Biochem Engn, 18 Sanqu Fatouxili, Beijing 100023, Peoples R China;[3]Beihang Univ, Sch Chem, Key Lab Bioinspired Smart Interfacial Sci & Techn, Minist Educ, 37 Xueyuan Rd, Beijing 100191, Peoples R China;[4]Swinburne Univ Technol, Fac Engn Comp & Sci, Res Ctr Sustainable Technol, Jalan Simpang Tiga, Sarawak 93350, Malaysia;[5]Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

第一机构：Beihang Univ, Sch Space & Environm, Shahe Campus, Beijing 102206, Peoples R China

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

年份：2022

卷号：292

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20221511961619);Scopus(收录号：2-s2.0-85127909031);WOS:【SCI-EXPANDED(收录号:WOS:000805972300002)】；

基金：Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant No. 52070009, 52000006, 51772031) , the China Post-doctoral Science Foundation (Grant No. 2020TQ0026) , and Funda-mental Research Fund for the Central Universities (buctrc202115) .

语种：英文

外文关键词：Packed bed; Membrane reactor; Carbon membrane; Electrochemical reduction; Nitrate; Bimetal catalysts

摘要：Nitrate pollution has become a widespread problem that poses a potential risk for public health. Although electrochemical reduction can be an effective and environmentally friendly strategy for nitrate removal, obtaining non-polluting products (nitrogen) in a short hydraulic retention time via this electrocatalytic process is still challenging. This work features an efficient reactor design that integrates an electrocatalytic packed-bed reactor with a membrane. Granular activated carbon (GAC) loaded with bimetal catalysts (Pd and Cu) was used as the bed packing material (Pd-Cu/GAC). The carbon membrane loaded Pd-Cu, served as cathode, filter, and current collector. The inner core packed with the Pd-Cu/GAC material functioned as an extended threedimensional electrocatalytic cathode and catalyst. This carbon membrane system can remove 100% nitrate with the packed-bed catalyst in Na2SO4 electrolyte, but only 79.38% without the packed-bed catalyst. The packed-bed configuration can also enhance the nitrogen (N2) selectivity from 39.66 to 78.31%, increasing the NO3- removal rate from 1.72 x 10-4 to 3.62 x 10-4 mmol min-1 cm-2, respectively. Notably, when NaOH electrolyte was used, the single-pass nitrate removal can achieve 100% with a 94.25 % N2 selectivity. These excellent performances highlight the potential to apply the integrated electrocatalytic packed-bed membrane reactor system reported here for large-scale nitrate remediation.