Disassembly and characterization of liquid crystal screens
Identifieur interne : 000F31 ( Main/Repository ); précédent : 000F30; suivant : 000F32Disassembly and characterization of liquid crystal screens
Auteurs : RBID : Pascal:13-0198540Descripteurs français
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- concept : Marché, Mercure, Verre, Pollution, Acier, Télévision, Déchet électronique.
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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.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Disassembly and characterization of liquid crystal screens</title><author><name sortKey="Juchneski, Nichele Cf" uniqKey="Juchneski N">Nichele Cf Juchneski</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>LACOR-PPGE3M, Universidade Federal do Rio Grande do Sul</s1><s2>Porto Alegre/RS</s2><s3>BRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Brésil</country><wicri:noRegion>Porto Alegre/RS</wicri:noRegion></affiliation></author><author><name sortKey="Scherer, Janine" uniqKey="Scherer J">Janine Scherer</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>LACOR-PPGE3M, Universidade Federal do Rio Grande do Sul</s1><s2>Porto Alegre/RS</s2><s3>BRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Brésil</country><wicri:noRegion>Porto Alegre/RS</wicri:noRegion></affiliation></author><author><name sortKey="Grochau, Ines H" uniqKey="Grochau I">Inês H. Grochau</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>LACOR-PPGE3M, Universidade Federal do Rio Grande do Sul</s1><s2>Porto Alegre/RS</s2><s3>BRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Brésil</country><wicri:noRegion>Porto Alegre/RS</wicri:noRegion></affiliation></author><author><name sortKey="Veit, Hugo M" uniqKey="Veit H">Hugo M. Veit</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>LACOR-PPGE3M, Universidade Federal do Rio Grande do Sul</s1><s2>Porto Alegre/RS</s2><s3>BRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Brésil</country><wicri:noRegion>Porto Alegre/RS</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="inist">13-0198540</idno><date when="2013">2013</date><idno type="stanalyst">PASCAL 13-0198540 INIST</idno><idno type="RBID">Pascal:13-0198540</idno><idno type="wicri:Area/Main/Corpus">000C98</idno><idno type="wicri:Area/Main/Repository">000F31</idno></publicationStmt><seriesStmt><idno type="ISSN">0734-242X</idno><title level="j" type="main">Waste management & research</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Contamination</term><term>Desassembly</term><term>Electronic scrap</term><term>Fabrication</term><term>Glass</term><term>Interstitial water</term><term>Liquid crystal displays</term><term>Market</term><term>Mercury</term><term>Pollution</term><term>Recycling</term><term>Screens</term><term>Steels</term><term>Surveillance</term><term>Television</term><term>Waste management</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Démontage</term><term>Fabrication</term><term>Surveillance</term><term>Marché</term><term>Recyclage</term><term>Mercure</term><term>Verre</term><term>Contamination</term><term>Pollution</term><term>Eau interstitielle</term><term>Acier</term><term>Affichage cristaux liquides</term><term>Ecran</term><term>Télévision</term><term>Gestion déchet</term><term>Déchet électronique</term></keywords><keywords scheme="Wicri" type="concept" xml:lang="fr"><term>Marché</term><term>Mercure</term><term>Verre</term><term>Pollution</term><term>Acier</term><term>Télévision</term><term>Déchet électronique</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><inist><standard h6="B"><pA><fA01 i1="01" i2="2"><s0>0734-242X</s0></fA01><fA02 i1="01"><s0>WMARD8</s0></fA02><fA05><s2>31</s2></fA05><fA06><s2>6</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Disassembly and characterization of liquid crystal screens</s1></fA08><fA11 i1="01" i2="1"><s1>JUCHNESKI (Nichele Cf)</s1></fA11><fA11 i1="02" i2="1"><s1>SCHERER (Janine)</s1></fA11><fA11 i1="03" i2="1"><s1>GROCHAU (Inês H.)</s1></fA11><fA11 i1="04" i2="1"><s1>VEIT (Hugo M.)</s1></fA11><fA14 i1="01"><s1>LACOR-PPGE3M, Universidade Federal do Rio Grande do Sul</s1><s2>Porto Alegre/RS</s2><s3>BRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA20><s1>549-558</s1></fA20><fA21><s1>2013</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>20652</s2><s5>354000504166930030</s5></fA43><fA44><s0>0000</s0><s1>© 2013 INIST-CNRS. 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