Cov roj thiab roj kev lag luam ntsib cov kev pheej hmoo tseem ceeb thaum lub sijhawm thauj mus los, rho tawm, thiab kev ua cov dej num hydrocarbons. Cov dej xau tuaj yeem ua rau muaj cov pa roj hmab txaus ntshai xws li cov nkev thiab hydrogen, nrog rau cov pa roj carbon monoxide zoo li cov pa roj carbon monoxide (co) thiab sulfur dioxide (so₂). Txhawm rau txo txoj kev pheej hmoo ntawm kev tawg thiab tiv thaiv kev lom, nws yog qhov tseem ceeb uas siv cov khoom siv tiv thaiv ua pa.
Ib yam li ntawd, nyob rau hauv cov semiconductor tsim kev lag luam, muaj tshuaj lom neeg tsim qauv xws li phosphorus, arsenic, thiab boron, thiab cov nplaim roj zoo li hydrogen. Yuav tsum muaj cov khoom siv ua pa ua pa yog qhov yuav tsum tau ua rau cov neeg ua haujlwm tiv thaiv kom tsis txhob muaj cov tshuaj lom volatile volatile tshuaj.
Hauv cov chaw nres tsheb, seb lawv puas yog hluav taws kub, roj tua hluav taws, lossis roj teeb hluav taws xob, lub zog hluav taws xob yuav tsim hluav taws xob zoo li cov pa roj carbon monomium. Nyob rau hauv cov chaw ib, cov khoom siv tiv thaiv ua pa yog qhov tseem ceeb rau kev tiv thaiv cov neeg ua haujlwm los nqus cov pa paug no.
Kev lag luam tshuaj kuj yuav tsum tau nruj me ntsis ua raws li kev tiv thaiv ua pa vim kev tsim khoom thiab cov roj ntsha thiab cov tshuaj tsw qab. Nqus cov tshuaj no tuaj yeem ua rau muaj kev pheej hmoo txaus rau kev noj qab haus huv.
Hauv cov chaw uas muaj ntau thiab cov chaw nres tsheb, qhov chaw ua haujlwm ntawm cov khoom siv ua pa roj av yog qhov tsis txaus ntseeg los ntawm kev ua pa tawm los ntawm kev ua pa oxygen los ntawm kev ua pa oxygen.
Hauv kho mob thiab kuaj xyuas qhov chaw ib puag ncig, ntau tiam ntawm kev siv hluav taws xob lom zem yuav tsum muaj cov khoom siv kev ua kom muaj kev phom sij. Cov qauv kev siv thiab cov kev ceev faj yog qhov tseem ceeb rau kev ua kom muaj zog ntawm cov khoom siv tiv thaiv ua pa. Thaum lub concentration ntawm cov roj ua haujlwm ntau dua li 5% ntawm cov khoom siv tiv thaiv kev nyab xeeb, thiab cov khoom siv tiv thaiv kev nyab xeeb yuav tsum tau siv thaum lub qhov pib no tau dhau los. Cov cuab yeej yuav tsum muaj nrog lub npog ntsej muag zoo, xws li lub zais zis-hom npog nrog cov pa roj nrog ua kom muaj kev tiv thaiv zoo tshaj plaws.
Hauv kev xaus, hauv kev lag luam ua pa, ua pa tiv thaiv ua rau cov neeg ua haujlwm tsis muaj teeb meem los ntawm kev nqus tau cov roj teeb thiab cov teeb meem. Ua raws li kev siv cov qauv kev pab thiab ua kom cov khoom siv tshwj xeeb ua kom muaj kev pheej hmoo ua haujlwm thiab tiv thaiv kev phom sij lom neeg thiab cov nplaim phom.
