Qhov Zoo Tshaj Tawm Ntawm Txhuas Txhuas nrog Coca-Cola Fwj
PET yas feem ntau pom nyob rau hauv Coca-Cola fwj tsis tuaj yeem yaj cov txhuas ncaj qha, tab sis lub kaus mom txhuas ntawm lub raj mis caj dab tuav cov khoom muaj nqis ntawm cov hlau. Ib phaus ntawm txhuas (kwv yees li 454 grams) yuav tsum muaj txog 31 tus qauv txhuas lub hau (txhua qhov hnyav txog 14.7 grams). Qhov zoo siab, yog tias koj khaws cov kaus poom txhuas, tsuas yog 24 lub kaus poom (txhua qhov hnyav txog 19 grams) yuav tsum tau sau ib phaus ntawm txhuas.
Kev Taug Kev Tshuaj Los Ntawm Kev Rov Ua Dua Rau Kev Rov Ua Dua
Kev rov ua dua tshiab ntawm txhuas yog zoo li cov txheej txheem ua khawv koob:
Kev sib cais theem: Sib nqus sib cais tshem tawm cov hlau impurities.
Smelting Theem: Molten aluminium ntws zoo li dej tsaws tsag nyiaj ntawm 660 degree.
Purification Stage: Electrolysis yields 99.7% rov ua dua txhuas.
Tag nrho cov txheej txheem txuag 95% ntawm lub zog piv rau mining bauxite.
Qhov tseem ceeb ntawm Environmental Arithmetic
Sau ib phaus ntawm recycled aluminium yog sib npaug rau:
Txuag 4 kg ntawm bauxite ore
Txo cov pa roj carbon dioxide emissions los ntawm 1.5 kg
Txuag hluav taws xob txaus los siv lub teeb 40-watt rau 50 teev