Kev Nyuaj Siab Rau Lub Neej
Zaj dab neeg chilling pib thaum yav tsaus ntuj ntawm Lub Rau Hli 15 hauv Henan Xeev, qhov chaw lub tsheb tub yees nqa cov zaub mov tshiab tau dhau los ua qhov xwm txheej uas ntsiag to. Yim tus poj niam ua haujlwm tau pom tias tsis nco qab nyob hauv qhov chaw kaw, qhov kub thiab txias. Cov tub ceev xwm xav tias cov dej khov qhuav qhuav ua rau cov pa oxygen deprivation, ua rau asphyxiation thiab, thaum kawg, lawv cov neeg tuag tsis raws sijhawm. Thaum kev tshawb nrhiav tsis tu ncua, qhov xwm txheej no qhia txog qhov tsis txaus ntseeg ntawm cov dej khov qhuav hauv qhov chaw kaw.
Dry Ice yog dab tsi?
Rau feem ntau, "ice" conjures dluab ntawm lub caij ntuj sov refreshing haus. Tab sis nyob rau hauv kev tshawb fawb, dej khov siv nyob rau hauv ib tug deb ntau fascinating daim ntawv. Cov dej khov qhuav, cov khoom siv ntawm cov pa roj carbon dioxide (CO₂), tau pom thawj zaug hauv xyoo 1835 los ntawm Fab Kis kws tshuaj Charles Thilorier. Nws pom tias cov kua CO₂, thaum evaporation, tshuav ib qho khoom seem-qhov peb tam sim no paub tias yog dej khov qhuav.
Tsis zoo li cov dej khov li niaj zaus, uas yaj mus rau hauv dej, cov dej khov qhuav sublimates ncaj qha los ntawm cov khoom mus rau cov roj ntawm -78.5 ° C, tsis muaj kua seem. Cov cuab yeej no tau ua nws qhov kev xaiv zoo tshaj plaws rau kev thauj cov khoom puas tsuaj xws li dej khov thiab khoom siv kho mob.
Kev phom sij ntawm qhuav dej khov
Txawm hais tias nws siv dav, cov dej khov qhuav ua rau muaj kev phom sij ntsiag to. CO₂ yog cov roj uas tsis muaj xim, tsis muaj ntxhiab tsw uas hnyav dua li huab cua, ua rau nws nyob hauv qab ntawm qhov chaw kaw. Nyob rau hauv qhov chaw uas muaj cua tsis zoo, sublimating cov dej khov qhuav txav cov pa oxygen, ua rau hypoxia (cov pa oxygen tsawg) thiab nce hauv CO₂ concentration.
Cov tsos mob ntawm CO₂ Overexposure:
- hws
- Ua pa nrawm
- Lub plawv palpitations
- Ua tsis taus pa
- Ua tsis taus pa
Thaum CO₂ qib siab dua2%, cov tsos mob tshwm sim. Ntawm5%, cov roj induces ib tug narcotic nyhuv. Saum toj no8-10%, tsis nco qab thiab tuag tuaj yeem tshwm sim hauv feeb.
Cov xwm txheej ntawm lub neej tiag tiag
Tragic dab neeg ntawm qhuav dej khov mishandling qhia txog nws lub peev xwm ua rau tuag taus:
- 2004 Hurricane Ivan: Ib tug txiv neej siv 45 kg ntawm cov dej khov qhuav los khaws zaub mov hauv nws lub tsheb thaum muaj hluav taws xob. Lub tsheb qhov cua tsis zoo ua rau CO₂ qib nce siab, ua rau nws tsis nco qab txog kev cawmdim.
- 2022 Lab Accident: Cov tub ntxhais kawm tiav hauv University of California tau qaug zog thaum tuav cov dej khov qhuav hauv qhov tob tob. Txawm hais tias nws zoo li qub, qhov kev paub dhau los ua rau nws nrog PTSD, qhia txog kev xav thiab lub cev ntawm CO₂ raug.
Vim li cas CO₂ thiaj li txaus ntshai
Qhov hnyav molecular ntawm CO₂ ua rau nws denser dua huab cua, ua rau nws khaws cia rau hauv qhov chaw qis. Raws li CO₂ concentration nce, cov pa oxygen poob qis, ua rau muaj kev cuam tshuam ntawm lub cev xws li hyperventilation, txo cov ntshav pH, thiab cuam tshuam ntawm lub plawv thiab lub paj hlwb.
Kev Tiv Thaiv Kev Tiv Thaiv
- Qhov cua kom raug: Yuav tsum tuav cov dej khov qhuav hauv qhov chaw uas muaj cua zoo los tiv thaiv CO₂ tsub zuj zuj.
- Cov ntawv ceeb toom: Cov neeg muab khoom siv yuav tsum qhia meej cov thawv ntim nrog cov lus ceeb toom txaus ntshai rau ceeb toom cov neeg siv ntawm qhov txaus ntshai.
- Consumer Awareness: Tsis txhob khaws cia lossis siv cov dej khov qhuav hauv qhov chaw kaw, xws li tsheb lossis chav me me.
Xaus
Cov dej khov qhuav yog ib qho cuab yeej tseem ceeb rau kev khaws cia zaub mov thiab cov txheej txheem kev lag luam, tab sis nws cov kev phom sij hauv qhov chaw kaw feem ntau tsis saib xyuas. Qhov no tsis pom, tsis muaj ntxhiab tsw tuaj yeem ua rau tuag taus hauv feeb yog tias siv tsis raug. Txhim kho kev paub thiab tswj xyuas kev nyab xeeb yog qhov tseem ceeb rau kev tiv thaiv cov xwm txheej zoo sib xws.
Post lub sij hawm: Nov-25-2024