Nrog cov neeg siv khoom hauv tsev nyob rau hauv cov cuab yeej hluav taws xob thiab cov uas muaj cov khoom siv ua kua (LCD) tsheb, cov khoom siv no tsis siv, txo lawv qhov kev cuam tshuam yog qhov tseem ceeb dua.
Cov kev tshawb fawb yav dhau los tau pom cov kev piam sij ntawm LCD panels muaj kua kua, cov kua hluav taws xob thiab lwm yam hnyav hlau, tab sis tam sim no tsis muaj cov kua rau cov khoom ub no.
Nyob hauv cov ntsiab lus no, cov neeg tshawb fawb ntawm Taiwan Industrial Technology Research Institute (ITRI) npaj tsim tus qauv tshiab khib nyiab ub no kom hloov tau qhov teeb meem no. Lub system yog tus nqi zoo, tsis ua kom muaj cov pov tseg, thiab tso cai rau cov neeg lag luam kom txuag tau thiab rov qab siv ib co khoom hnyav rau cov khoom siv hauv LCD. Lub tshuab ua kom rov qab tau cov kua siv lead ua kua, indium thiab iav los ntawm kev sib cais sib cais, ppb purification, thiab nanopore technology.
Cov dej siv lead ua kua yog ib qho khoom siv hluav taws xob uas muaj cov nqi siab thiab kev nyab xeeb siab thiab tsis yooj yim biodegradable. Cov kua siv lead ua kua muaj roj ntau ntawm benzene nplhaib, fluorine, chlorine thiab bromine. Yog tias nws raug faus, nws yuav nkag mus rau hauv av thiab cuam tshuam rau lub ecosystem.
Kev tshawb fawb ITRI Chien-Wei Lu tau hais tias: "Cov kua siv ua kua dej, txawm tias tsuas muaj ob peb millimeters tuab, muaj ntau tshaj li cov khoom siv tau, ua rau lawv tuav thiab coj mus tshwj xeeb tshaj li qub Peb muaj kev ntsuam xyuas ntawm cov yam ntxwv thiab reusability ntawm txhua cov ntaub ntawv hauv qhov kev sib txuas ntawm cov khoom siv yog tsim los: ua ntej cais cov kua siv lead ua kua, indium thiab iav cov ntaub ntawv, thiab mam li pib sib txawv cov cuab yeej sib txawv rau txhua qhov khoom, thiab tom qab ntawd paub qhov kev siv cov ntaub ntawv no. " Txoj kev yog smashed los ntawm vaj huam sib luag Lub cev pib nrog kev muaj peev xwm mus tsoo lub LCD vaj huam sib luag rau las pov tseg cov khoom siv lead ua kua hauv lub vaj huam sib luag. Lub vaj huam sib luag cais nyias nkag nyias thaum nkag mus rau hauv cov kua siv kua nplaum thiab cov kua siv lead ua kua tau muab rho tawm tau los ntawm ib qho kev sib thooj ntawm ntau txoj kab. Cov kua siv lead ua kua dej nyob rau ntawm cov iav substrate, ua kom lub zog ua hauj lwm kom txo cov sij hawm ua ke los ntawm kev sib txuas extraction thiab purification zog. Lub impurities therein yuav raug tshem tawm los ntawm ntsev adsorption. Tom qab tshem tawm ntawm cov kua siv lead ua kua, cov piam chaw phais vaj huam sib luag nkag mus rau hauv indium extraction system thiab pheej pheej siv los ntawm tus neeg tu qhov muag kom tshem tawm ntawm indium ntawm lub vaj huam sib luag tawg. Cov thooj av uas muaj indium yog xaus nrog lub reagent thiab nkag mus rau hauv indium concentration system, uas yog ces concentrated los ntawm ib qho kev nplua nuj.
Tom qab tshem feem ntau ntawm cov khoom, tus sau cov txheej txheem ntawm SiO2, Al2O3, B2O3, thiab lwm yam alkaline earth oxide hlau iav pib. Cov kua siv lead ua kua tawm tshiab los ntawm txoj kev tshiab no tau rov qab siv kom paub txog kev lag luam ntawm indium thiab kua khoom siv lead ua kua. Cov dej ua kua siv ua kua dej los ntawm cov kav dej kua qaub ua tau ua kom ze li ntawm 100% cov kua siv lead ua rov qab thiab 90% rov tom qab. Cov txheej txheem no yuav txo tau cov nqi ntawm cov kua siv tshiab ua kua thiab txo cov kev cuam tshuam rau ntawm ib puag ncig.
LCD vaj huam sib luag
Yav dhau los cov kev tshawb fawb pom muaj kev piam sij ntawm cov kua nplaum ua kua, indium thiab lwm yam hlau hnyav nyob hauv LCD panels. Yog tias tus kabmob noj cov khoom muaj kua roj kua dej-soluble, nws yuav ua rau cov kabmob tsis muaj cov metabolism, uas ua rau cov kabmob ntau yam kabmob. Yog tias raug kub hnyiab los ntawm qhov kub txaus, cov kua siv lead ua yuav tig mus rau hauv CFC thiab rhuav tshem cov txheej txheem atmospheric ozone; Yog tias nws yog incinerated ntawm qhov tsawg kub, cov kua siv lead ua kua yuav ua dioxins, PCB, hydrochloric acid los yog hydrofluoric acid, thiab cov no yog cov neeg ua txhaum ntawm cov pa phem. Lub culprit.
Kev kho lub cev ua kua ntawm cov kua siv lead ua kua yuav tsum muaj lub rooj tsav khoom ua kom tawg thiab ntxiv rau cov pob zeb los yog cov pob zeb, tiam sis qhov no tsis tuaj yeem tshem cov khoom xws li kua siv lead ua kua, indium, tin thiab molybdenum hauv cov kua siv ua kua. Yog li, tom qab muaj dej nag yaig, cov khoom siv ua kua thiab cov ntaub ntawv hnyav yuav ua rau muaj pa phem rau cheeb tsam.
Cov vev-xaij LCD muaj cov khoom pov tseg hauv ntau lub teb chaws thiab cheeb tsam. Qhov teeb meem no yuav tsum tau ua hauv qhov chaw ua haujlwm los yog burying, hlawv, los yog lub cev ua ntawm LCD vaj huam sib luag pov tseg, tab sis qhov no ua rau tus nqi ua thiab kev puas tsuaj ib puag ncig.
Los ntsuam xyuas cov cuab yeej tshiab no, ITRI tau teeb tsa ib qho chaw cog kev lag luam uas tuaj yeem hais txog 3 tuj ntawm LCD vaj huam sib luag ib hnub, tsim tawm 3 kg ntawm kua siv lead ua, 750 g ntawm indium thiab 2550 kg ntawm iav, uas yuav rov qab siv dua ntsuab lub tsev los yog raws li ib tug hnyav hlau adsorbent.
Nws yog kwv yees hais tias pua pua txhiab tus tons ntawm LCD vaj huam sib luag pov tseg yog tsim txhua txhua xyoo nyob rau hauv North America. Yog li, qhov kev kho zoo ntawm LCD vaj huam sib luag pov tseg yog ua haujlwm ceev!
