Ib qho txiaj ntsig ntawm cov teeb pom kev zoo uas tsis paub los ntawm tib neeg
Tam sim no cov neeg feem coob twb paub lawm tias LED teeb yog lub teeb ci tshiab uas txuag hluav taws xob thiab txo qis emissions. Tab sis muaj lwm qhov txiaj ntsig zoo uas feem ntau tsis saib xyuas, uas yog, tsis muaj kuab lom thiab tiv thaiv ib puag ncig.
Peb paub tias mercury yog ib yam tshuaj lom heev, tab sis yuav luag feem ntau ntawm cov khoom siv hluav taws xob muaj txiaj ntsig zoo tam sim no muaj cov mercury, thiab cov mercury muaj qhov kub tsis tshua muaj kub thiab tuaj yeem evaporate ntawm chav tsev kub. Tom qab pov tseg thiab muab pov tseg lub teeb pom kev tawg, nws tam sim ntawd tawm mercury vapor mus rau ib puag ncig, tam sim ntawd ua rau cov mercury concentration nyob rau hauv cov huab cua puag ncig mus txog 10-20 mg / m3, uas tshaj qhov siab dua qhov tso cai ntawm mercury nyob rau hauv cov huab cua teev tseg. lub xeev (0.01 mg / m3). Cubic meter) 1000 txog 2000 zaug. Raws li kev tshawb fawb txog mercury los ntawm Stanford University hauv Tebchaws Meskas, 1 milligram ntawm mercury txaus los ua paug rau 5454.5 kilograms ntawm cov dej haus, ua rau nws poob qis ntawm cov qauv kev haus dej nyab xeeb. Qhov tshwm sim ntawm huab cua thiab dej paug los ntawm mercury yog qhov hnyav heev. Tom qab noj los ntawm cov kab mob hauv dej, CH3Hg yuav raug tsim. Qhov no yog ib qho tshuaj lom neeg uas tuaj yeem tua tib neeg nrog ib nrab ib rab diav pob ntseg. Mercury nws tus kheej tuaj yeem ua rau lub hauv nruab nrab lub paj hlwb puas, thiab cov teebmeem ntawm kev ua me nyuam los ntawm nws kuj hnyav heev. Mercury tseem tuaj yeem ua rau lub raum thiab lub siab puas tsuaj, thiab tuaj yeem ua rau tuag taus hauv cov koob tshuaj txaus. Mercury tuaj yeem hloov mus rau ntau txoj hauv kev hauv av, hauv dej ntws, txawm nyob hauv huab cua, thiab hauv cov khoom noj khoom haus. Yog li ntawd, persistence, txav mus los thiab siab bioaccumululation ua rau mercury yog ib qho ntawm feem nthuav cov pa phem nyob rau hauv lub ntiaj teb no. Qhov xwm txheej loj tshaj plaws ntawm mercury lom hauv keeb kwm yog qhov xwm txheej Minamata hauv Nyiv. Lub sijhawm ntawd, ntau pua tus neeg tuag vim tias cov dej hauv Minamata Bay tau kis kab mob mercury. Tam sim no tsoomfwv Nyij Pooj tau kawm ib zaj lus qhia thiab xav kom txhua lub teeb fluorescent uas tau muab pov tseg yuav tsum tau kho nrog cov tshuaj lom neeg, uas yuav tsum tau cov neeg yuav cov roj fluorescent zoo tib yam them ob npaug ntawm tus nqi txhawm rau txhawm rau txhawm rau pov tseg cov tshuaj lom.
Tsis ntev los no, tsoomfwv Suav tau faib 100 lab lub teeb txuag hluav taws xob dawb. Txawm hais tias cov ntsiab lus mercury ntawm txawv teb chaws tshwj xeeb qis-mercury txuag hluav taws xob tuaj yeem raug txo kom tsawg dua 5mg tsis ntev los no (Kuv tsis paub yog tias tsoomfwv Suav tau muab cov teeb hluav taws xob tsawg-mercury txuag hluav taws xob), tab sis qhov me me kuj tseem tsis tau. txo nws cov kev phom sij, vim hais tias cov ntsiab lus mercury ntawm xws li lub teeb txuag hluav taws xob tsawg tsawg txaus kom muaj kuab paug 27.27 tons ntawm cov dej haus. Thiab 100 lab lub teeb txuag hluav taws xob txaus txaus los ua paug rau 2.7 billion tons ntawm dej, uas yog sib npaug rau cov dej siv los ntawm cov neeg thoob plaws lub tebchaws tau ntau xyoo.
Vim tias tsis muaj cov koom haum tshwj xeeb rov ua dua tshiab thiab cov kev cai rov ua dua tshiab hauv Suav teb, feem ntau cov teeb fluorescent thiab lub teeb txuag hluav taws xob tau faus zoo li cov khib nyiab zoo tib yam, thiab ob lub teeb fluorescent thiab lub teeb txuag hluav taws xob siv cov iav tsis zoo li lub plhaub, yog li cov mercury hauv lawv yuav tsum. Yuav tau khiav tawm, thiab vim tias muaj ntau cov mercury, nws yooj yim rau hauv dab dej thiab nkag mus rau hauv av, thiab tom qab ntawd raug siv los ntawm tib neeg thiab tsiaj txhu. Cov kev tshwm sim yog unimaginable. Tshwj xeeb, cov pej xeem yuav luag tsis quav ntsej txog qhov teeb meem ntawm mercury.
Tsis tas li ntawd, tag nrho cov hluav taws xob lub teeb pom kev zoo uas siv mercury vapor rau emit lub teeb siv hluav taws xob los foob cov mercury vapor los tsim cov hluav taws xob ultraviolet. Lub teeb ultraviolet no kuj yog ib hom kev ua qias tuaj ib puag ncig. Nws lub ntsiab wavelength yog 2537 angstroms = 2537x10-10m = 253.7nm, uas yog hu ua UV-C ultraviolet lub teeb. Txog 60% ntawm cov hluav taws xob siv hluav taws xob tuaj yeem hloov mus rau hauv lub teeb ultraviolet, thiab lwm lub zog (txog 40%) tuaj yeem hloov mus rau hauv lub zog cua sov. Cov khoom siv fluorescent nyob rau sab hauv ntawm lub raj absorbs ultraviolet lub teeb thiab tso tawm lub teeb pom kev. Cov tshuaj fluorescent sib txawv emit lub teeb pom kev sib txawv. Feem ntau, kev hloov dua siab tshiab ntawm" ultraviolet lub teeb" rau hauv" pom lub teeb" yog 40%. Yog li, qhov ua tau zoo ntawm lub teeb fluorescent yog li 60 % x 40 | = 24%, uas yog kwv yees li peb mus rau tsib npaug ntawm lub teeb tungsten nrog tib lub zog. Hauv lwm lo lus, tseem muaj -(40%+ 24%) = 36% ntawm cov hluav taws xob ultraviolet uas tsis hloov mus rau lwm lub zog thiab tawg ncaj qha rau ntawm phab ntsa iav raj. 36% ib ntawm cov hluav taws xob ultraviolet hla lub iav raj phab ntsa kom deplete txog 94 %, yog li yuav muaj 36 % x6%= 2.16% ntawm UV-C hla lub iav raj. UV-C twb suav hais tias yog Deep UV rau tib neeg lub cev, uas yog qhov tsis zoo. Lub tuam txhab American GE singular pom zoo tias tib neeg yuav tsum tsis txhob raug cov teeb fluorescent rau ntau tshaj 16 teev. Kev puas tsuaj ntawm cov hluav taws xob ultraviolet rau tib neeg lub cev yog tag nrho cov nyiaj tau los thoob plaws hauv lub neej. Qhov no tseem ceeb heev rau cov ntxhais uas nyiam kev zoo nkauj.
Tsis tas li ntawd xwb, lub teeb txuag hluav taws xob thiab cov teeb fluorescent kuj muaj hluav taws xob microwave. Ib tug kws tshawb fawb Taiwan ntsuas lub microwave hluav taws xob ntawm lub teeb txuag hluav taws xob hauv nws lub tsev. Cov txiaj ntsig tau raws li hauv qab no. Thaum lub teeb tsis tig, lub microwave hluav taws xob ntsuas hauv chav yog 0.011 microwatts ib square centimeter (0.011μW / cm2) nyob rau hauv 0.5-3GHz zaus ntau. Tom qab tig rau 60W incandescent teeb, tus nqi microwave Tsis hloov; Tom qab hloov mus rau 15W lub teeb txuag hluav taws xob, tus nqi microwave yog siab li 50 microwatts ib square centimeter (50μW / cm2), uas yog 5000 npaug ntawm cov teeb incandescent. Hloov nrog lub teeb txuag hluav taws xob 26W, nws cov nqi hluav taws xob microwave yog siab li 100 microwatts ib square centimeter (100μW / cm2), uas yog 10,000 npaug ntawm cov roj teeb incandescent thiab yuav luag siab dua li ntawm cov xov tooj ntawm tes. Lub teb chaws microwave tus qauv kev tu cev yog 50 microwatts / cm2, yog li nws tau dhau lub teb chaws microwave tus qauv. Lub zog hluav taws xob nthwv dej ntawm lub teeb txuag hluav taws xob 15-watt yog li 70 milligauss, thiab lub zog hluav taws xob siv hluav taws xob ntawm 26-watt lub zog txuag teeb yog 80 milligauss. Lub 60-watt incandescent teeb yog yuav luag xoom. Vim hais tias cov txheej txheem ntawm cov teeb fluorescent thiab lub teeb txuag hluav taws xob yog tib yam, lub microwave hluav taws xob ntawm cov teeb fluorescent tsuas yog siab dua li cov teeb txuag hluav taws xob, thiab yuav tsis qis dua li cov teeb txuag hluav taws xob. Thiab hom hluav taws xob microwave no tuaj yeem ua rau kiv taub hau. Kev tshawb fawb Nyij Pooj qhia tau hais tias cov neeg uas ua haujlwm nyob rau pem hauv ntej ntawm lub computer ntev ntev yuav tsum paub tias lub computer cov kua siv lead ua kua kuj siv lub teeb txias cathode fluorescent teeb zoo ib yam li lub teeb fluorescent li lub teeb backlight.
