Aluminium sulfate, uas sawv cev los ntawm tshuaj lom neeg hu ua Al2(SO4)3, yog cov khoom dawb crystalline uas feem ntau siv rau hauv cov txheej txheem kho dej. Thaum txhuas sulfate cuam tshuam nrog dej, nws dhau los ntawm hydrolysis, ib qho tshuaj lom neeg uas cov dej molecules tawg cov tshuaj sib xyaw ua ke rau hauv nws cov ions sib xyaw. Qhov tshuaj tiv thaiv no ua lub luag haujlwm tseem ceeb hauv ntau yam kev siv, tshwj xeeb tshaj yog hauv kev ntxuav dej.
Cov khoom tseem ceeb ntawm cov tshuaj tiv thaiv no yog txhuas hydroxyl complex. Cov tshuaj no tseem ceeb heev rau kev kho dej, vim nws pab tshem tawm cov khoom tsis huv ntawm dej. Aluminium hydroxyl complex muaj qhov ceev ceev, thiab thaum tsim, nws nyiam ntes thiab coagulate cov khoom me me, xws li av nplaum, xuab zeb, thiab cov organic. Yog li ntawd, cov khoom me me no dhau los ua cov khoom loj dua thiab hnyav dua, ua rau nws yooj yim dua rau lawv kom tawm hauv dej.
Cov kua qaub sulfuric uas tsim tawm hauv cov tshuaj tiv thaiv tseem nyob hauv cov tshuaj thiab pab txhawb rau qhov acidity ntawm lub cev tag nrho. Qhov acidity tuaj yeem hloov kho raws li qhov xav tau, nyob ntawm qhov xav tau tshwj xeeb ntawm cov txheej txheem kho dej. Kev tswj hwm pH yog qhov tseem ceeb rau kev ua kom zoo dua ntawm cov txheej txheem coagulation thiab flocculation. Nws kuj tseem txo qhov alkalinity ntawm cov dej. Yog tias qhov alkalinity ntawm cov dej pas dej nws tus kheej qis, ces NaHCO3 yuav tsum tau ntxiv los ua kom alkalinity ntawm cov dej.
Cov tshuaj tiv thaiv ntawm txhuas sulfate thiab dej feem ntau siv rau hauv cov kauj ruam coagulation thiab flocculation ntawm cov chaw kho dej. Coagulation cuam tshuam nrog kev ua kom cov khoom me me uas raug tshem tawm tsis ruaj khov, thaum flocculation txhawb kev sib sau ua ke ntawm cov khoom me me no rau hauv cov flocs loj dua, yooj yim daws tau. Ob qho txheej txheem no tseem ceeb rau kev tshem tawm cov khoom tsis huv thiab kev ua kom dej ntshiab.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias kev siv cov txhuas sulfate hauv kev kho dej tau ua rau muaj kev txhawj xeeb txog ib puag ncig vim muaj peev xwm sib sau ua ke ntawm txhuas hauv cov ecosystem hauv dej. Txhawm rau kom txo tau cov kev txhawj xeeb no, kev ntsuas thiab kev saib xyuas kom meej yog qhov tseem ceeb kom ntseeg tau tias cov txhuas ntau hauv cov dej kho tau ua raws li cov qauv kev cai.
Xaus lus, thaum txhuas sulfate sib xyaw nrog dej, nws dhau los ua hydrolysis, tsim cov txhuas hydroxide thiab sulfuric acid. Cov tshuaj lom neeg no yog qhov tseem ceeb rau cov txheej txheem kho dej, qhov twg txhuas hydroxide ua haujlwm ua cov coagulant los tshem tawm cov khoom tsis huv ntawm dej. Kev tswj hwm thiab kev saib xyuas kom zoo yog qhov tsim nyog los xyuas kom meej tias dej huv si thiab txo qis kev cuam tshuam rau ib puag ncig.
Lub sijhawm tshaj tawm: Lub Peb Hlis-05-2024