Non-destructive characterization of mechanically processed waste printed circuit boards - particle liberation analysis
Document identifier: oai:DiVA.org:ltu-76890
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10.1016/j.wasman.2019.11.006Keyword: Engineering and Technology,
Environmental Engineering,
Other Environmental Engineering,
Teknik och teknologier,
Naturresursteknik,
Annan naturresursteknik,
Metal deportment/concentration,
Liberation,
Elemental analysis,
Micro X-ray fluorescence,
Synchrotron,
Tomography,
Recycling,
Avfallsteknik,
Waste Science and TechnologyPublication year: 2020Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: This work aimed to develop and propose methods for evaluating the metal degree of liberation to characterize the metal deportment/concentration and liberation/association of mechanically processed waste Printed Circuit Boards (PCBs) that hold the complex and heterogeneity structure and metal distribution/association. Waste PCBs passed through a series of mechanical processing (i.e. comminution, sieving) for the metal recovery were characterized to understand and to evaluate the metal distribution and degree of liberation of the metals in order to optimize the comminution process, avoiding excessive fine particle production. The characterizations were performed at laboratory scale, as well as utilizing large scale experimental facilities, i.e. a portable X-Ray Fluorescence (XRF), micro-XRF and Synchrotron X-Ray Tomography. The proposed methods confirmed that metal liberation was very high in the fine size fraction (0.125–0.350 mm) while many locked particles were identified in the coarse size fraction (0.350–0.500 mm). Such results were analyzed and were discussed in order to better understand metal deportment/concentration behaviors. The advantages and disadvantages related to the different characterization approaches were identified and discussed in this paper, as well as their methodological developments in a waste PCBs’ mechanical processing perspective.
Authors
Akira Otsuki
Luleå tekniska universitet; Geovetenskap och miljöteknik; Ecole Nationale Supérieure de Géologie, GeoRessources UMR 7359 CNRS, University of Lorraine, Vandoeuvre-lès-Nancy, France
Other publications
>>
Luc De La Mensbruge
Ecole Nationale Supérieure de Géologie, GeoRessources UMR 7359 CNRS, University of Lorraine, Vandoeuvre-lès-Nancy, France
Other publications
>>
Andrew King
Synchrotron SOLEIL, Gif-sur-Yvette Cedex, France
Other publications
>>
Silvia Serranti
Dipartimento di Ingegneria Chimica Materiali Ambiente, La sapienza - University of Roma, Rome, Italy
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>>
Ludovica Fiore
Dipartimento di Ingegneria Chimica Materiali Ambiente, La sapienza - University of Roma, Rome, Italy
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>>
Giuseppe Bonifazi
Dipartimento di Ingegneria Chimica Materiali Ambiente, La sapienza - University of Roma, Rome, Italy
Other publications
>>
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header:
identifier: oai:DiVA.org:ltu-76890
datestamp: 2021-04-19T12:56:50Z
setSpec: SwePub-ltu
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recordCreationDate: 2019-11-27
identifier:
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76890
10.1016/j.wasman.2019.11.006
31760196
2-s2.0-85075265224
titleInfo:
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lang: eng
title: Non-destructive characterization of mechanically processed waste printed circuit boards - particle liberation analysis
abstract: This work aimed to develop and propose methods for evaluating the metal degree of liberation to characterize the metal deportment/concentration and liberation/association of mechanically processed waste Printed Circuit Boards (PCBs) that hold the complex and heterogeneity structure and metal distribution/association. Waste PCBs passed through a series of mechanical processing (i.e. comminution sieving) for the metal recovery were characterized to understand and to evaluate the metal distribution and degree of liberation of the metals in order to optimize the comminution process avoiding excessive fine particle production. The characterizations were performed at laboratory scale as well as utilizing large scale experimental facilities i.e. a portable X-Ray Fluorescence (XRF) micro-XRF and Synchrotron X-Ray Tomography. The proposed methods confirmed that metal liberation was very high in the fine size fraction (0.125–0.350 mm) while many locked particles were identified in the coarse size fraction (0.350–0.500 mm). Such results were analyzed and were discussed in order to better understand metal deportment/concentration behaviors. The advantages and disadvantages related to the different characterization approaches were identified and discussed in this paper as well as their methodological developments in a waste PCBs’ mechanical processing perspective.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Environmental Engineering
Other Environmental Engineering
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Naturresursteknik
Annan naturresursteknik
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lang: eng
topic: Metal deportment/concentration
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lang: eng
topic: Liberation
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lang: eng
topic: Elemental analysis
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lang: eng
topic: Micro X-ray fluorescence
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lang: eng
topic: Synchrotron
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lang: eng
topic: Tomography
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lang: eng
topic: Recycling
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lang: swe
authority: ltu
topic: Avfallsteknik
genre: Research subject
@attributes:
lang: eng
authority: ltu
topic: Waste Science and Technology
genre: Research subject
language:
languageTerm: eng
genre:
publication/review-article
ref
note:
Published
6
Validerad;2019;Nivå 2;2019-11-27 (johcin)
name:
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namePart:
Otsuki
Akira
role:
roleTerm: aut
affiliation:
Luleå tekniska universitet
Geovetenskap och miljöteknik
Ecole Nationale Supérieure de Géologie GeoRessources UMR 7359 CNRS University of Lorraine Vandoeuvre-lès-Nancy France
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De La Mensbruge
Luc
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affiliation: Ecole Nationale Supérieure de Géologie GeoRessources UMR 7359 CNRS University of Lorraine Vandoeuvre-lès-Nancy France
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King
Andrew
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affiliation: Synchrotron SOLEIL Gif-sur-Yvette Cedex France
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Serranti
Silvia
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affiliation: Dipartimento di Ingegneria Chimica Materiali Ambiente La sapienza - University of Roma Rome Italy
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Ludovica
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affiliation: Dipartimento di Ingegneria Chimica Materiali Ambiente La sapienza - University of Roma Rome Italy
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Bonifazi
Giuseppe
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affiliation: Dipartimento di Ingegneria Chimica Materiali Ambiente La sapienza - University of Roma Rome Italy
originInfo:
dateIssued: 2020
publisher: Elsevier
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titleInfo:
title: Waste Management
identifier: 0956-053X
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type: volume
number: 102
extent:
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end: 519
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form: print
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