کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
641735 1457013 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly selective recovery of palladium by a new silica-based adsorbent functionalized with macrocyclic ligand
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Highly selective recovery of palladium by a new silica-based adsorbent functionalized with macrocyclic ligand
چکیده انگلیسی

A new kind of silica-based adsorbent with high selectivity and efficient adsorption for palladium ion (Pd(II)) was synthesized in this study. A macrocyclic polyether isomer was modified for incorporation to the silica matrix as a ligand to realize the complexation between Pd(II) and the adsorbent. The adsorption of Pd(II) in HNO3 media was evaluated by both batch and column operations. Influences including acidity, contact time, initial metal concentration and elution conditions were detailed. From a practical viewpoint, the functionalized adsorbent was employed for the recovery of Pd(II) from the simulated high level liquid waste (HLLW) containing a large amount of interferences. Superior selectivity to Pd(II) as well as a recovery rate higher than 90% was obtained. A mechanism concerning the formation of complex ion-pair was proposed for the description of the Pd(II)-binding process. The macrocyclic ligand functionalized silica adsorbent possesses potential for the recovery of the palladium resource in radioactive liquid waste.

A new silica-based adsorbent functionalized with macrocyclic ligand was synthesized. The adsorbent showed high selectivity and efficient adsorption to Pd(II) in HNO3 media. Enrichment of Pd(II) in simulated radioactive waste stream was realized with a recovery rate of high than 90%.Figure optionsDownload as PowerPoint slideHighlights
► Novel silica-based adsorbent functionalized with macrocyclic ligand.
► High selectivity and efficient adsorption of Pd(II).
► Pd(II)-recovery rate higher than 90% in simulated radioactive stream.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 106, 14 March 2013, Pages 38–46
نویسندگان
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