文献类型：期刊文献

英文题名：Functionalized biobased carbon electrodes for selective phosphorus removal by capacitive deionization: Application and theory study

作者：Zhao, Linting[1,2] Li, Zhihan[2,3] Zhang, Wei[1] Jin, Can[4] Liu, Yunlong[4] Wang, Shi[1] Kang, Xudong[1] Ma, Wucheng[1] Zhang, Hao[1] Chen, Lin[1] Zhu, Liang[1]

第一作者：Zhao, Linting

通信作者：Zhang, W[1];Jin, C[1];Zhu, L[1]

机构：[1]Hohai Univ, Coll Environm, Key Lab Integrated Regulat & Resources Dev Shallow, Nanjing 210098, Peoples R China;[2]Shanxi Agr Univ, Coll Urban & Rural Construct, Taigu 030801, Peoples R China;[3]Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Peoples R China;[4]Natl Forestry & Grassland Adm, Chinese Acad Forestry, Natl Engn Res Ctr Low Carbon Proc & Utilizat Fores, Inst Chem Ind Forest Prod,Key Lab Chem Engn Fores, Nanjing 210042, Peoples R China

年份：2024

卷号：499

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20244117173626);Scopus(收录号：2-s2.0-85205893610);WOS:【SCI-EXPANDED(收录号:WOS:001332632200001)】；

基金：This study was financially supported by the Fundamental Research Funds for the Central Universities (grant number: B230205049 and B23017010264) .

语种：英文

外文关键词：Capacitive deionization; Phosphate removal; Surface functionalization; Biobased carbon; Density functional theory

摘要：Capacitive deionization (CDI) emerges as a viable and efficient strategy for the removal and recovery of phosphorus from wastewater. However, the economic feasibility and complex synthesis of current electrode materials restrict its broader industrial application. To overcome the limitation, we fabricated aminated biobased electrode materials (MRSCN) from rice straw, forming active sites and hydrogen bonding interaction interfaces throughout the bulk phase by the nitrogen sites and peripheral amino groups in MRSCN, thereby enhancing the rapid enrichment and selective adsorption of phosphates. The phosphate adsorption capacity of MRSCN electrode reached up to 5.03 mg P/g at 1.2 V. In the presence of competing anions (Cl-,- , NO3 -and 3 - and SO42-), 4 2- ), MRSCN exhibited markedly improved selective adsorption for phosphorus. Furthermore, density functional theory (DFT) calculations revealed that the incorporation of nitrogen active sites optimized the electronic structure of MRSCN. Meanwhile, H2PO4- 2 PO 4- and HPO42-anions 4 2- anions served as hydrogen bond donors to the amino groups, leading to a more robust binding affinity between MRSCN and phosphates relative to other anions. The synergistic interaction between nitrogen sites and amino groups in facilitating selective phosphate removal was validated at the molecular scale. This study demonstrated the considerable potential of modified biobased carbon materials for the application in phosphate removal utilizing the CDI technique.