Pollutant vs Contaminant
Ob qho chaw paug thiab paug yog cov khoom pov tseg lossis tsis xav tau. Contaminant yog ib lo lus uas siv los piav txog qee yam khoom siv lossis cov khoom siv ntawm ib yam khoom. Contaminant, nyob rau hauv lub teb ntawm chemistry, kuj hais txog cov mixs uas tau npaj chemically. Cov no tuaj yeem yog cov khoom siv cellular thiab. Cov kab mob kis tau yooj yim txhais tau tias yog ib feem ntawm cov khoom tshwj xeeb lossis lub cev uas tsis xav tau ntawm qhov chaw ntawd thiab tuaj yeem ua rau muaj kab mob vim nws muaj nyob hauv cov khoom, lub cev, lossis thaj chaw ib puag ncig. Pollutant yog ib yam khoom uas muaj qee yam pov tseg. Qhov no tuaj yeem ua rau muaj kuab paug nyob rau ntau qhov chaw ntawm ib puag ncig xws li av, dej lossis huab cua.
Cov pa phem feem ntau yog ua rau muaj kuab paug nyob hauv feem ntau ntawm thaj chaw. Cov pa phem uas muaj kuab paug tuaj yeem ua rau yog nyob ntawm qhov xwm txheej ntawm cov pa phem no, qhov concentration ntawm cov pa phem no thiab lub sijhawm uas nws tuaj yeem ua rau muaj kuab paug hauv qee thaj chaw. Qhov xwm txheej ntawm cov tshuaj lom neeg muaj kuab paug kuj pab txiav txim siab cov tshuaj tiv thaiv uas nws tuaj yeem ua rau thiab qhov hnyav ntawm cov pa phem uas tsim los ntawm nws. Muaj ntau cov pa phem xws li biodegradable pollutants uas tsis tuaj yeem muaj sia nyob ntev ntev hauv ib puag ncig. Ntawm qhov tod tes, muaj cov pa phem uas tuaj yeem muaj sia nyob hauv ib puag ncig thiab rau lub sijhawm ntev thiab tuaj yeem ua rau muaj teeb meem loj. Muaj qee cov pa phem uas ua rau cov khoom tom qab degradation. Cov khoom degraded no kuj yog ib qho ua rau muaj kuab paug. Cov khoom uas tuaj nyob rau hauv cov pa phem no yog DDD thiab DDE uas yog qhov tshwm sim ntawm degradation ntawm DDT.
Qhov sib txawv loj ntawm cov pa phem thiab cov pa phem yog cov pa phem tau muab qhab nia rau ntau hom xws li Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cov Khoom Uas Muaj Cai. Stock pollutants yog cov pa phem uas degraded sai. Cov nyiaj muaj kuab paug yog cov uas tuaj yeem ua rau ib feem ntawm ib puag ncig thiab siv sijhawm ua ntej lawv raug puas tsuaj tag. Ntawm qhov tod tes, Contaminant tuaj yeem siv los xa mus rau txhua yam kev ua qias tuaj uas tshwm sim vim yog ib yam khoom uas tsis xav tau hauv txhua txoj kev. Cov pa phem tseem ceeb yog cov uas tuaj yeem sau tau yooj yim xws li Organic Pollutants, Hlau, thiab Organic Compounds thiab lwm yam. Cov pa phem yog cov khoom uas tau qhia los ntawm tus txiv neej mus rau ib puag ncig los ntawm txhua txoj kev thaum cov pa phem tuaj yeem qhia los ntawm tus txiv neej lossis nws. tuaj yeem nkag mus rau hauv ib puag ncig ib puag ncig. Contaminant yog ib lo lus uas feem ntau siv rau qhov chaw ntawm cov pa phem uas tshwm sim los ntawm cov khoom uas tau tsim los ntawm tib neeg. Ib qho piv txwv feem ntau yog kev tsim cov tshuaj tsis zoo los ntawm cov chaw tsim khoom sib txawv. Cov kab mob no muaj lub neej ntev nyob rau hauv ib puag ncig thiab muaj peev xwm ua rau lawv kis tau rau hauv ib feem loj ntawm ib puag ncig uas ua rau muaj teeb meem ntau dua li piv rau cov uas tshwm sim los ntawm cov pa phem. Lwm qhov sib txawv ntawm cov pa phem thiab cov pa paug yog tias cov pa phem tuaj yeem pom nyob rau hauv ib puag ncig ntawm ntau hom xws li cov pa luam yeeb, tshuaj lom neeg thiab lwm yam, thaum cov pa paug tuaj yeem pom nyob rau hauv ntau yam xws li av, nroj tsuag, huab cua, dej, thiab tseem nyob hauv cov pov tseg tawm los ntawm tib neeg.
