Disassembly and characterization of liquid crystal screens.
Identifieur interne : 000779 ( Main/Exploration ); précédent : 000778; suivant : 000780Disassembly and characterization of liquid crystal screens.
Auteurs : RBID : pubmed:23615511English descriptors
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Abstract
The technology used in the manufacturing of televisions and monitors has been changing in recent years. Monitors with liquid crystal displays (LCD) emerged in the market with the aim of replacing cathode ray tube monitors. As a result, the disposal of this type of product, which is already very high, will increase. Thus, without accurate knowledge of the components and materials present in an LCD monitor, the recycling of materials, such as mercury, thermoplastic polymers, glasses, metals and precious metals amongst others, is not only performed, but allows contamination of soil, water and air with the liberation of toxic compounds present in this type of waste when disposed of improperly. Therefore, the objective of this study was to disassemble and characterize the materials in this type of waste, identify the composition, amount and form to enable, in further work, the development of recycling routes. After various tests and analyses, it was observed that an LCD display can be recycled, provided that precautions are taken. Levels of lead, fluoride and copper are above those permitted by the Brazilian law, characterizing this residue as having a high pollution potential. The materials present in printed circuit boards (base and precious metals)-thermoplastics, such as polyethylene terephthalate, acrylic, acrylonitrile butadiene styrene and polycarbonate and metals, such as steel and aluminum, and a layer of indium (in the internal face of the glass)-are components that make a point in terms of their potential for recycling.
DOI: 10.1177/0734242X13485795
PubMed: 23615511
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Disassembly and characterization of liquid crystal screens.</title><author><name sortKey="Juchneski, Nichele C F" uniqKey="Juchneski N">Nichele C F Juchneski</name><affiliation wicri:level="1"><nlm:affiliation>LACOR-PPGE3M, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS, Brazil.</nlm:affiliation><country xml:lang="fr">Brésil</country><wicri:regionArea>LACOR-PPGE3M, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS</wicri:regionArea></affiliation></author><author><name sortKey="Scherer, Janine" uniqKey="Scherer J">Janine Scherer</name></author><author><name sortKey="Grochau, Ines H" uniqKey="Grochau I">Inês H Grochau</name></author><author><name sortKey="Veit, Hugo M" uniqKey="Veit H">Hugo M Veit</name></author></titleStmt><publicationStmt><date when="2013">2013</date><idno type="RBID">pubmed:23615511</idno><idno type="pmid">23615511</idno><idno type="doi">10.1177/0734242X13485795</idno><idno type="wicri:Area/Main/Corpus">000661</idno><idno type="wicri:Area/Main/Curation">000661</idno><idno type="wicri:Area/Main/Exploration">000779</idno></publicationStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Liquid Crystals</term><term>Microscopy, Electron, Scanning</term><term>Recycling</term><term>Spectroscopy, Fourier Transform Infrared</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Liquid Crystals</term><term>Microscopy, Electron, Scanning</term><term>Recycling</term><term>Spectroscopy, Fourier Transform Infrared</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The technology used in the manufacturing of televisions and monitors has been changing in recent years. Monitors with liquid crystal displays (LCD) emerged in the market with the aim of replacing cathode ray tube monitors. As a result, the disposal of this type of product, which is already very high, will increase. Thus, without accurate knowledge of the components and materials present in an LCD monitor, the recycling of materials, such as mercury, thermoplastic polymers, glasses, metals and precious metals amongst others, is not only performed, but allows contamination of soil, water and air with the liberation of toxic compounds present in this type of waste when disposed of improperly. Therefore, the objective of this study was to disassemble and characterize the materials in this type of waste, identify the composition, amount and form to enable, in further work, the development of recycling routes. After various tests and analyses, it was observed that an LCD display can be recycled, provided that precautions are taken. Levels of lead, fluoride and copper are above those permitted by the Brazilian law, characterizing this residue as having a high pollution potential. The materials present in printed circuit boards (base and precious metals)-thermoplastics, such as polyethylene terephthalate, acrylic, acrylonitrile butadiene styrene and polycarbonate and metals, such as steel and aluminum, and a layer of indium (in the internal face of the glass)-are components that make a point in terms of their potential for recycling.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">23615511</PMID><DateCreated><Year>2013</Year><Month>05</Month><Day>24</Day></DateCreated><DateCompleted><Year>2013</Year><Month>12</Month><Day>16</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1399-3070</ISSN><JournalIssue CitedMedium="Internet"><Volume>31</Volume><Issue>6</Issue><PubDate><Year>2013</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA</Title><ISOAbbreviation>Waste Manag Res</ISOAbbreviation></Journal><ArticleTitle>Disassembly and characterization of liquid crystal screens.</ArticleTitle><Pagination><MedlinePgn>549-58</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1177/0734242X13485795</ELocationID><Abstract><AbstractText>The technology used in the manufacturing of televisions and monitors has been changing in recent years. Monitors with liquid crystal displays (LCD) emerged in the market with the aim of replacing cathode ray tube monitors. As a result, the disposal of this type of product, which is already very high, will increase. Thus, without accurate knowledge of the components and materials present in an LCD monitor, the recycling of materials, such as mercury, thermoplastic polymers, glasses, metals and precious metals amongst others, is not only performed, but allows contamination of soil, water and air with the liberation of toxic compounds present in this type of waste when disposed of improperly. Therefore, the objective of this study was to disassemble and characterize the materials in this type of waste, identify the composition, amount and form to enable, in further work, the development of recycling routes. After various tests and analyses, it was observed that an LCD display can be recycled, provided that precautions are taken. Levels of lead, fluoride and copper are above those permitted by the Brazilian law, characterizing this residue as having a high pollution potential. The materials present in printed circuit boards (base and precious metals)-thermoplastics, such as polyethylene terephthalate, acrylic, acrylonitrile butadiene styrene and polycarbonate and metals, such as steel and aluminum, and a layer of indium (in the internal face of the glass)-are components that make a point in terms of their potential for recycling.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Juchneski</LastName><ForeName>Nichele C F</ForeName><Initials>NC</Initials><Affiliation>LACOR-PPGE3M, Universidade Federal do Rio Grande do Sul, Porto Alegre/RS, Brazil.</Affiliation></Author><Author ValidYN="Y"><LastName>Scherer</LastName><ForeName>Janine</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Grochau</LastName><ForeName>Inês H</ForeName><Initials>IH</Initials></Author><Author ValidYN="Y"><LastName>Veit</LastName><ForeName>Hugo M</ForeName><Initials>HM</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType><PublicationType>Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2013</Year><Month>04</Month><Day>24</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Waste Manag Res</MedlineTA><NlmUniqueID>9881064</NlmUniqueID></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="Y">Liquid Crystals</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Microscopy, Electron, Scanning</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Recycling</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Spectroscopy, Fourier Transform Infrared</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Electronic waste</Keyword><Keyword MajorTopicYN="N">LCD monitors</Keyword><Keyword MajorTopicYN="N">disassembly</Keyword><Keyword MajorTopicYN="N">materials characterization</Keyword><Keyword MajorTopicYN="N">metals</Keyword><Keyword MajorTopicYN="N">polymers</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="aheadofprint"><Year>2013</Year><Month>4</Month><Day>24</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2013</Year><Month>4</Month><Day>26</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2013</Year><Month>4</Month><Day>26</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2013</Year><Month>12</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">23615511</ArticleId><ArticleId IdType="pii">0734242X13485795</ArticleId><ArticleId IdType="doi">10.1177/0734242X13485795</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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