Polyaluminium chlorideyog cov khoom siv dej purification thiab inorganic polymer coagulant. Nws muaj adsorption, cohesion, nag lossis daus thiab lwm yam khoom, thiab tuaj yeem siv rau hauv ntau qhov chaw xws li daim ntawv sizing tus neeg saib xyuas, qab zib decolorizing clarifier, tanning, tshuaj, tshuaj pleev ib ce, precision casting thiab dej phwj tuaj kho.
Peb yam ntawm kev sib cuam tshuam ntawm PAC coagulant thiab aqueous tov
Thaum PAC coagulant ntxiv rau cov tshuaj aqueous, qhov destabilization tshwm sim ntawm colloidal hais muaj peb yam kev cuam tshuam: colloidal hais thiab coagulant, colloidal hais thiab aqueous tov, thiab coagulant thiab aqueous tov. Nws yog ib qho phenomenon.
- Adsorption Electroneutralization
Adsorption thiab hluav taws xob neutralization txhais tau hais tias cov particle nto muaj zog adsorption nyhuv ntawm cov khoom sib txawv ntawm cov ions sib txawv, sib txawv colloidal hais los yog saw ion molecules. Qhov no adsorption neutralizes ib feem ntawm nws cov nqi thiab txo cov hluav taws xob zoo li qub. Repulsive quab yuam, yog li nws yog ib qho yooj yim mus ze rau lwm yam hais thiab adsorb ib leeg. Nyob rau lub sijhawm no, electrostatic attraction feem ntau yog qhov tseem ceeb ntawm cov teebmeem no, tab sis nyob rau hauv ntau qhov xwm txheej, lwm yam teebmeem tshaj electrostatic attraction.
- Adsorption Bridging Effect
Cov txheej txheem ntawm adsorption thiab bridging feem ntau yog hais txog adsorption thiab bridging ntawm polymer tshuaj thiab colloidal hais. Nws kuj tseem tuaj yeem nkag siab tias ob qhov loj loj colloid ntawm tib qhov loj sib txuas ua ke vim tias muaj cov khoom sib txawv ntawm qhov sib txawv ntawm qhov nruab nrab. Polymer flocculants muaj cov qauv linear, thiab lawv muaj cov tshuaj lom neeg uas tuaj yeem cuam tshuam nrog qee qhov chaw ntawm cov khoom siv colloidal. Thaum cov polymer tuaj rau hauv kev sib cuag nrog cov colloidal hais, cov pab pawg tuaj yeem tsim cov tshuaj tiv thaiv tshwj xeeb nrog cov colloidal particle nto thiab adsorb ib leeg. Tus so ntawm cov polymer molecule stretches nyob rau hauv cov kev daws teeb meem thiab muaj peev xwm adsorb mus rau lwm colloid nrog vacancy ntawm nws nto, kom lub polymer ua raws li ib tug choj kev twb kev txuas. Yog hais tias muaj ob peb colloidal hais thiab stretched ib feem ntawm lub polymer tsis tuaj yeem ua raws li qhov thib ob colloidal particle, tom qab ntawd sai lossis tom qab qhov txuas ntxiv no yuav raug adsorbed mus rau lwm qhov los ntawm cov khoom qub colloidal, thiab cov polymer yuav tsis tuaj yeem ua si. bridging luag hauj lwm, thiab cov colloidal hais yuav nyob rau hauv ib tug ruaj khov lub xeev dua. Thaum cov koob tshuaj ntawm polymer flocculant loj dhau lawm, qhov chaw ntawm cov khoom colloidal yuav saturated thiab ua rau rov stabilization. Yog hais tias cov colloidal particles uas tau txuas thiab flocculated yog raug rau lub zog thiab lub sij hawm ntev stirring, lub bridging polymer yuav detach los ntawm nto ntawm lwm colloidal particle thiab yob rov qab mus rau lub qub nto ntawm lub colloidal particle, uas ua rau ib tug restabilized lub xeev.
- Sediment Traping Mechanism
Thaum cov ntsev ntsev (xws li txhuas sulfate los yog ferric chloride) los yog hlau oxides thiab hydroxides (xws li txiv qaub) yog siv los ua coagulants, thaum ntau npaum li cas los sai sai precipitate hlau hydroxides (xws li Al (OH) 3, Fe (OH). 3, Mg (OH) 2 los yog hlau carbonates (xws li CaCO3), colloidal hais nyob rau hauv dej yuav raug daig los ntawm cov precipitates thaum lawv tsim. 3 nyob rau hauv nruab nrab thiab acidic pH ntau), cov nag lossis daus tuaj yeem nrawm nrawm los ntawm qhov muaj cov anions hauv cov tshuaj, xws li nyiaj sulfate ions. Tsis tas li ntawd, cov colloidal hais lawv tus kheej hauv cov dej tuaj yeem tsim ua precipitates ntawm cov hlau oxyoxides. Cov tub ntxhais, yog li qhov kev pom zoo tshaj plaws ntawm coagulant yog inversely proportional rau qhov concentration ntawm cov khoom yuav tsum tau muab tshem tawm, uas yog, ntau colloidal hais, qhov tsawg npaum li cas ntawm hlau coagulant.