Polyacrylonitrile-encapsulated amorphous zirconium phosphate composite adsorbent for Co, Nd and Dy separations

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dc.contributor.author Xu, Junhua
dc.contributor.author Virolainen, Sami
dc.contributor.author Zhang, Wenzhong
dc.contributor.author Kuva, Jukka
dc.contributor.author Sainio, Tuomo
dc.contributor.author Koivula, Risto
dc.date.accessioned 2018-08-13T12:28:01Z
dc.date.available 2018-08-13T12:28:01Z
dc.date.issued 2018-11-01
dc.identifier.citation Xu , J , Virolainen , S , Zhang , W , Kuva , J , Sainio , T & Koivula , R 2018 , ' Polyacrylonitrile-encapsulated amorphous zirconium phosphate composite adsorbent for Co, Nd and Dy separations ' , Chemical Engineering Journal , vol. 351 , pp. 832-840 . https://doi.org/10.1016/j.cej.2018.06.112
dc.identifier.other PURE: 115070193
dc.identifier.other PURE UUID: 74bedef8-f109-44dc-9e86-edf92f05e818
dc.identifier.other RIS: urn:D2D259BEAD08960B80D602E27D85D316
dc.identifier.other Scopus: 85049082507
dc.identifier.other WOS: 000444000000086
dc.identifier.other ORCID: /0000-0002-6547-9775/work/47428476
dc.identifier.other ORCID: /0000-0003-4108-5517/work/47429717
dc.identifier.other ORCID: /0000-0001-9184-0723/work/47429989
dc.identifier.uri http://hdl.handle.net/10138/238268
dc.description.abstract Recycled Nd and Dy from the end-of-life NdFeB permanent magnet is an important supplement for the increasing demand of rare-earth elements. Thus, there is an urgent need to develop an environmentally friendly recycling method. Amorphous zirconium phosphate exhibits selective separation properties towards the ternary Co-Nd-Dy system, however, its powdery form limits development of scaled-up applications. We present an efficient amorphous ZrP/Polyacrylonitrile (am-ZrP/PAN) composite ion exchanger for uptake and separation of Nd, Dy and Co. The am-ZrP/PAN composite was synthesized and its structural, morphologic and acidic properties were investigated by various methods. X-ray tomography revealed rather evenly distributed am-ZrP in the PAN polymer matrix. The selectivity and ion-exchange kinetics of the am-ZrP/PAN composite were determined in relation to the individual elements. Due to dimethylformide (DMF) intercalation into the interlayer of ZrP, the uptake of Co, Nd and Dy increased 50% compared with that of the pristine am-ZrP. Column separation of Co, Nd and Dy from the Co-Nd-Dy ternary system was assessed by varying the feed concentration, loading degree, temperature, running speed and elution agent (HNO3) concentration. Finally, gradient elution was employed for Co, Nd and Dy separation from a simulated ternary leachate. Fractions with 87.9% pure Co, 96.4% pure Nd and 40% pure Dy were collected through a single-column operation. en
dc.format.extent 9
dc.language.iso eng
dc.relation.ispartof Chemical Engineering Journal
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Zirconium phosphate
dc.subject NdFeB magnet
dc.subject Ion exchange
dc.subject DMF intercalation
dc.subject Rare earth separation
dc.subject Gradient elution
dc.subject NDFEB MAGNETS
dc.subject BEHAVIOR
dc.subject ION-EXCHANGE
dc.subject BEADS
dc.subject RECOVERY
dc.subject REMOVAL
dc.subject DYSPROSIUM
dc.subject 116 Chemical sciences
dc.title Polyacrylonitrile-encapsulated amorphous zirconium phosphate composite adsorbent for Co, Nd and Dy separations en
dc.type Article
dc.contributor.organization Ion exchange for nuclear waste treatment and for recycling
dc.contributor.organization Department of Chemistry
dc.contributor.organization Laboratory of Radiochemistry (-2016)
dc.contributor.organization Doctoral Programme in Chemistry and Molecular Sciences
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.cej.2018.06.112
dc.relation.issn 1385-8947
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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