Vim li cas thiaj xaiv Polyaluminium Chloride rau kev kho dej

Kev kho dej yog ib feem tseem ceeb ntawm kev tiv thaiv ib puag ncig thiab kev noj qab haus huv pej xeem, thiab nws lub hom phiaj yog kom ntseeg tau tias cov dej huv thiab ua tau raws li qhov xav tau ntawm ntau yam kev siv. Ntawm ntau txoj kev kho dej,polyaluminum chloride(PAC) raug xaiv dav rau nws cov khoom tshwj xeeb thiab cov txiaj ntsig coagulation zoo.

Cov nyhuv coagulation zoo: PAC muaj kev ua tau zoo heev ntawm kev coagulation thiab tuaj yeem tshem tawm cov khoom tsis huv xws li cov khoom khov kho, colloids thiab cov organic tsis yaj hauv dej thiab txhim kho cov dej zoo.

Cov txheej txheem coagulation ntawm PAC

Lub tshuab ntawm polyaluminium chloride (PAC) ua ib qho coagulant feem ntau suav nrog kev nias ntawm ob txheej hluav taws xob, kev them nqi neutralization thiab net trapping. Kev nias ntawm ob txheej hluav taws xob txhais tau tias tom qab ntxiv PAC rau dej, txhuas ions thiab chloride ions tsim ib txheej adsorption ntawm qhov chaw ntawm cov khoom colloidal, yog li nias ob txheej hluav taws xob ntawm qhov chaw ntawm cov khoom colloidal, ua rau lawv tsis ruaj khov thiab condense; adsorption bridging yog Cov cations hauv PAC molecules nyiam ib leeg thiab cov nqi tsis zoo ntawm qhov chaw ntawm cov khoom colloidal, tsim ib qho "choj" qauv los txuas ntau cov khoom colloidal; qhov cuam tshuam netting yog los ntawm kev nqus thiab bridging nyhuv ntawm PAC molecules thiab cov khoom colloidal, uas nets cov khoom colloidal. Ntes hauv lub network ntawm coagulant molecules.

Kev siv tshuaj kho dej polyaluminum chloride

Piv nrog cov inorganic flocculants, nws tau txhim kho qhov decolorization nyhuv ntawm cov dyes. Nws txoj kev ua haujlwm yog tias PAC tuaj yeem txhawb cov xim molecules los tsim cov flocs zoo los ntawm kev nias lossis neutralization ntawm cov txheej hluav taws xob ob txheej.

Thaum PAM siv ua ke nrog PAC, cov anionic organic polymer molecules tuaj yeem siv cov nyhuv bridging ntawm lawv cov saw ntev molecular los tsim cov flocs tuab dua nrog kev koom tes ntawm tus neeg sawv cev destabilizing. Cov txheej txheem no pab txhim kho cov nyhuv settling thiab ua rau cov hlau hnyav ions yooj yim tshem tawm. Tsis tas li ntawd, cov lej loj ntawm cov pab pawg amide uas muaj nyob rau hauv cov saw sab ntawm anionic polyacrylamide molecules tuaj yeem tsim cov ionic bonds nrog -SON hauv cov xim zas. Kev tsim cov tshuaj sib txuas no txo ​​​​​​qhov solubility ntawm cov organic flocculant hauv dej, yog li txhawb kev tsim sai thiab nag ntawm flocs. Lub tshuab sib txuas tob no ua rau nws nyuaj rau cov hlau hnyav ions kom dim, txhim kho kev ua haujlwm zoo thiab cov txiaj ntsig ntawm kev kho mob.

Nyob rau hauv cov nqe lus ntawm phosphorus tshem tawm, qhov ua tau zoo ntawm polyaluminum chloride tsis tuaj yeem tsis quav ntsej. Thaum ntxiv rau phosphorus-muaj dej khib nyiab, nws tuaj yeem hydrolyze los tsim trivalent txhuas hlau ions. Cov ion no khi rau soluble phosphates nyob rau hauv cov dej khib nyiab, hloov qhov kawg mus rau hauv insoluble phosphate precipitates. Cov txheej txheem hloov pauv no zoo tshem tawm phosphate ions los ntawm cov dej khib nyiab thiab txo qhov tsis zoo ntawm phosphorus rau cov dej lub cev.

Ntxiv rau qhov kev cuam tshuam ncaj qha nrog phosphate, cov nyhuv coagulation ntawm polyaluminum chloride kuj ua lub luag haujlwm tseem ceeb hauv cov txheej txheem tshem tawm phosphorus. Nws tuaj yeem ua tiav adsorption thiab bridging los ntawm kev nias cov txheej txheem them rau ntawm qhov chaw ntawm phosphate ions. Cov txheej txheem no ua rau cov phosphates thiab lwm yam organic kuab paug hauv cov dej khib nyiab kom sai sai coagulate rau hauv clumps, tsim cov flocs uas yooj yim rau kev daws.

Qhov tseem ceeb tshaj, rau cov khoom me me uas raug tshem tawm tom qab ntxiv cov neeg sawv cev tshem tawm phosphorus, PAC siv nws lub tshuab ntes cov ntaub ntawv tshwj xeeb thiab cov nyhuv neutralization muaj zog los txhawb kom maj mam loj hlob thiab tuab ntawm cov khoom raug tshem tawm no, thiab tom qab ntawd condense, aggregate, thiab flocculate rau hauv cov khoom loj dua. Cov khoom me me no ces nyob rau hauv qab txheej, thiab los ntawm kev sib cais cov khoom khov-kua, cov kua supernatant tuaj yeem tso tawm, yog li ua tiav kev tshem tawm phosphorus zoo. Cov txheej txheem lub cev thiab tshuaj lom neeg no ua kom muaj kev ua haujlwm zoo thiab ruaj khov ntawm kev kho dej khib nyiab, muab kev lees paub zoo rau kev tiv thaiv ib puag ncig thiab kev siv dej dua tshiab.