Poly Aluminium Chloride e tlosa litšila joang metsing?

Poly Aluminium Chloride(PAC) ke motsoako oa lik'hemik'hale o sebelisoang haholo ho phekola metsi le metsi a litšila ka lebaka la katleho ea ona ho tlosa litšila. Mokhoa oa eona oa ts'ebetso o kenyelletsa mehato e 'maloa ea bohlokoa e tlatsetsang ho hloekisoeng ha metsi.

Taba ea pele, PAC e sebetsa joalo ka coagulant lits'ebetsong tsa kalafo ea metsi. Coagulation ke ts'ebetso ea ho tsitsisa likaroloana tsa colloidal le ho emisoa ka metsing, ho etsa hore li kopane 'me li thehe likaroloana tse kholo tse bitsoang li-flocs. PAC e finyella sena ka ho fokotsa liqoso tse mpe holim'a likaroloana tsa colloidal, tse li lumellang hore li kopane 'me li thehe li-flocs ka mokhoa o bitsoang charge neutralization. Li-flocs tsena li bonolo ho li tlosa ka mekhoa e latelang ea ho hloekisa.

Ho thehoa ha li-flocs ho bohlokoa bakeng sa ho tlosa litšila tse sa tšoaneng metsing. PAC e atleha ho tlosa lintho tse tiileng tse fanyehiloeng, tse kang likaroloana tsa letsopa, silt le lintho tse phelang, ka ho li kenya ka har'a lihlopha. Lintho tsena tse tiileng tse fanyehiloeng li ka kenya letsoho ho ntlafatseng metsi, ho etsa hore ho bonahale ho le maru kapa ho le lerootho. Ka ho kopanya likaroloana tsena ho li-flocs tse kholoanyane, PAC e thusa ho tlosoa ha tsona nakong ea ts'ebetso ea sedimentation le filtration, e leng se hlahisang metsi a hlakileng haholoanyane.

Ho feta moo, PAC e thusa ho tlosoa ha lintho tsa tlhaho tse qhibilihisitsoeng le metsoako e bakang mebala metsing. Lintho tse phelang tse qhibilihisitsoeng, tse kang humic le fulvic acid, li ka fana ka litatso tse sa thabiseng le menko e sa thabiseng metsing 'me li ka 'na tsa sebelisana le sebolaea-libaktheria ho etsa lihlahisoa tse kotsi tse bolaeang likokoana-hloko. PAC e thusa ho kopanya le ho khahlisa metsoako ena ea tlhaho holim'a lihlopha tse entsoeng, ka hona e fokotsa ho tsepamisa mohopolo oa tsona metsing a hloekisitsoeng.

Ntle le lintho tse phelang, PAC e ka boela ea tlosa litšila tse fapaneng tse tsoang metsing. Litšilafalo tsena li ka kenyelletsa litšepe tse boima, tse kang arsenic, lead, le chromium, hammoho le li-anion tse ling tse kang phosphate le fluoride. PAC e sebetsa ka ho etsa li-insoluble metal hydroxide precipitates kapa ka ho kenya li-ion tsa tšepe holim'a eona, ka hona, li fokotsa khatello ea tsona metsing a hloekisitsoeng ho ea maemong a fihlelang litekanyetso tsa taolo.

Ho feta moo, PAC e bonts'a melemo ho feta li-coagulants tse ling tse sebelisoang hangata ho hloekisa metsi, joalo ka aluminium sulfate (alum). Ho fapana le alum, PAC ha e fetole pH ea metsi haholo nakong ea ts'ebetso ea coagulation, e thusang ho fokotsa tlhoko ea lik'hemik'hale tsa phetoho ea pH le ho fokotsa litšenyehelo tse akaretsang tsa kalafo. Ho feta moo, PAC e hlahisa lithole tse fokolang ha li bapisoa le li-alum, e leng se lebisang litšenyehelong tse tlase tsa ho lahla le litlamorao tsa tikoloho.

Ka kakaretso, Poly Aluminium Chloride (PAC) ke coagulant e sebetsang hantle haholo e bapalang karolo ea bohlokoa ho tloseng litšila tse fapaneng metsing. Bokhoni ba eona ba ho khothaletsa coagulation, flocculation, sedimentation, le adsorption process e etsa hore e be karolo ea bohlokoa lits'ebetsong tsa kalafo ea metsi lefatšeng ka bophara. Ka ho nolofatsa ho tlosoa ha lintho tse tiileng tse fanyehiloeng, lintho tse phelang tse qhibilihisitsoeng, metsoako e bakang mebala, le litšila tse sa tloaelehang, PAC e thusa ho hlahisa metsi a nooang a hloekileng, a hlakileng le a sireletsehileng a finyellang litekanyetso tsa taolo. Tšebeliso e ntle ea litšenyehelo, boiketlo ba tšebeliso, le tšusumetso e fokolang ho pH ea metsi li e etsa khetho e ratoang bakeng sa limela tse hloekisang metsi tse batlang litharollo tse tšepahalang le tse tšoarellang tsa tlhoekiso ea metsi.