文献类型：期刊文献

英文题名：Post-synthetically functionalized covalent organic frameworks for highly efficient recovery of gold from leaching liquor of electronic waste

作者：Liu, Fenglei[1,2];Wang, Shanshan[1];Hu, Zhengfeng[3];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Sch Life & Environm Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China;[2]Zhejiang Normal Univ, Inst Phys Chem, Key Lab Minist Educ Adv Catalysis Mat, Jinhua 321004, Peoples R China;[3]Ecoenvironm Sci Res & Design Inst Zhejiang Prov, Key Lab Environm Pollut Control Technol Res Zhejia, Hangzhou 310007, Zhejiang, Peoples R China

年份：2024

卷号：329

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:001099201500001)、、EI(收录号：20234114849914)、Scopus(收录号：2-s2.0-85173581830)、WOS

基金：This research was supported by Zhejiang Provincial Natural Science Foundation of China under Grant No. LQ23B060002, and Key Labora- tory of Environmental Pollution Control Technology Research of Zhe- jiang Province (NO.2021ZEKL12) .

语种：英文

外文关键词：Covalent organic frameworks; Au(III); Adsorption; Reduction; E-waste

外文摘要：Recovery of precious metals from e-waste was of great economic and environmental significance. Herein, the spherical covalent organic frameworks (COF-V) were constructed by the Schiff base reaction between 1, 3, 5-tris (4-aminophenyl) benzene and 2, 5-divinylterephthalaldehyde, followed by post-synthetic modification using mono-(6-mercapto-6-deoxy)-beta-cyclodextrin (S-beta-CD) and dithiothreitol (DTT) for recovery of gold from e-waste. Multi-farious microscopic and spectroscopic techniques were used to explore the micromorphology and elemental composition of all the materials. Meanwhile, the response surface method was used to optimize the experimental parameters to improve the adsorption performance of Au(III). The functionalized spherical COFs exhibited excellent Au(III) adsorption abilities with maximum adsorption capacities of 652.6 mg/g and 820.8 mg/g for COF-V-DTT and COF-V-S-beta-CD, respectively. The impressive properties were due to the synergistic adsorption effect of the grafted hydroxyl and sulfhydryl groups in appropriately sized ordered pores. The spectral analysis demonstrated that Au(III) was firstly adsorbed on the adsorbents by coupling with the S atom, and then in situ reduced to Au(0) by hydroxyl groups. Moreover, two COFs materials also exhibited an excellent selectivity in the actual gold-containing waste liquid. Thus, this study would provide an efficient and economical way to recovery Au(III) from wastewater.