净水技术2025，Vol.44Issue(4)：126-133,8.DOI:10.15890/j.cnki.jsjs.2025.04.015
偕胺肟化纳米多孔微球的制备及其对六价铬的超强吸附性能
Preparation of Functionalized Nanoporous Amidoxime Microspheres and the Super Performance for Chromium Adsorption
摘要
Abstract
[Objective]This study reports the preparation of amidoxime-functionalized nanoporous microsphere and its pore formation mechanism,and investigates the strong adsorption performance for hexavalent chromium,providing data support for the treatment of chromium-contained coating industrial wastewater.[Methods]Nanoporous microsphere precursor was prepared using polyacrylonitrile and polystyrene as raw material based on thermally induced phase separation technology,and amidoxime functionalized nanoporous microsphere(AMS)was obtained through amidoxime reaction.The adsorption of hexavalent chromium[Cr(Ⅵ)]on AMS was studied.[Results]The result showed that AMS with uniform diameter could be prepared using dimethyl sulfoxide as the diluent and controlling polymer mass fraction of 2%.The surface of the microsphere was rough,which was rich in multiple nanopores,and the porosity was as high as 89.5%.The mechanism of nanopore formation included:Rapid quenching and cooling caused significant Mullins-Seekerka instability,formating of nanoscale dimethyl sulfoxide(DMSO)crystals and ultimately evolving into nanopores.[Conclusion]At pH value of 4.0,AMS had high adsorption capacity for Cr(Ⅵ)(463.9 mg/g),which was much higher than other chromium adsorbents reported in literature,demonstrating its high potential for removing chromium pollutants.关键词
吸附剂/微球/纳米孔/吸附/六价铬[Cr(Ⅵ)]Key words
adsorbent/microsphere/nanopore/adsorption/hexavalent chromium[Cr(Ⅵ)]分类
资源环境引用本文复制引用
李文彦,李保君,涂永辉..偕胺肟化纳米多孔微球的制备及其对六价铬的超强吸附性能[J].净水技术,2025,44(4):126-133,8.基金项目
国家自然科学基金(22306120) （22306120）
上海市优秀学术/技术带头人计划资助(23XD1431800) （23XD1431800）
上海航天先进技术联合研究基金(USCAST2022-24) （USCAST2022-24）
福建省STS计划配套院省合作项目(2023T3053) （2023T3053）
