A new amidoxime-functionalized ultrahigh molecular weight polyethylene fibrous adsorbent（UHMWPEg-PAO） was used for the recovery of Au（III） from acid aqueous solution.The maximum experimental absorption capacity of UHMWPE-g-PAO fiber was found to be approximately 220.0 mg·g-1.Au adsorption on UHMWPE-g-PAO was characterized by synchrotron radiation-based microcomputed tomography（SR-μ-CT）,transmission electron microscopy（TEM）,X-ray absorption near-edge structure spectroscopy（XANES） and synchrotron radiation-based Fourier transform infrared microspectroscopy（SR-FTIR）.The SR-μ-CT and TEM results showed the distribution features of gold particles on the fiber.The mechanism of Au（III） recovery from aqueous solutions by UHMWPE-g-PAO was based on the adsorbed Au（III） ions,which were reduced to metallic zero-valent gold（Au（0）） by amino groups（-NH2） in the amidoxime（AO）groups during the adsorption process,as confirmed by highresolution TEM（HRTEM） and XANES analyses.X-ray diffraction（XRD） results indicated that the incineration ashes contained metallic zero-valent gold.In conclusion,this amidoxime-functionalized fibrous adsorbent is a promising material for recovering gold from aqueous solution.
类型: 期刊论文
作者: Yu-Lin Liang,Chan Jin,Jiang-Tao Hu,Zhen Liu,Yan Li,Jian-Rong Zeng,Guo-Zhong Wu,Xiang-Jun Wei
来源: Rare Metals 2019年11期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 化学,环境科学与资源利用
单位: Shanghai Institute of Applied Physics,Chinese Academy of Sciences,University of Chinese Academy of Sciences,School of Physical Science and Technology,Shanghai Tech University
基金: financially supported by the National Natural Science Foundation of China(Nos.21677116,91543118,11775289 and 11275256)
分类号: O647.33;X703
页码: 1105-1112
总页数: 8
文件大小: 1177K
下载量: 14
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