文献类型：期刊文献

英文题名：Interlayer intercalation of Li/Al-LDHs responsible for high-efficiency boron extraction

作者：Pan, Yanan[1];Du, Jianglong[3];Chen, Jun[1];Lian, Cheng[3];Lin, Sen[1,2];Yu, Jianguo[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：539

外文期刊名：DESALINATION

收录：;EI(收录号：20222912376611);WOS:【SCI-EXPANDED(收录号:WOS:000830807900001)】；

基金：This work was sponsored by the National Natural Science Founda- tion of China (21978094 and U20A20142) .

语种：英文

外文关键词：Boron adsorption; Li/Al-LDHs; Interlayer ion exchange; Desorption; DFT calculation

摘要：In this study, Li/Al-LDHs were used to extract boron resources as efficient adsorbents due to their excellent interlayer anion storage. The Li/Al-LDHs reached a boron adsorption capacity of up to 42.91 mg/g at a pH of 12.0. The adsorption performance fluctuated greatly with pH because of the existence of boron forms with different Li/Al-LDHs interlayer intercalation energies. Structural characterization and density functional theory (DFT) calculation results indicated that boron entering the Li/Al-LDHs layers increased the layer spacing and formed various borate species, along with destroying the pore uniformity. In addition, the coexisting anions (Cl-, SO42- and PO43-) significantly affected the adsorption performance in connection with the Li/Al-LDHs interlayer spacing extension and adsorption competition. Cyclic experiments further confirmed that the boron that adsorbed into the interlayer could be completely extracted to guarantee the recyclability of the Li/Al-LDHs.