Mokhoa oa ho lemoha Polyaluminium Chloride Content

E le coagulant ea bohlokoa tšimong ea Phekolo ea Metsi, ho lemoha boleng ba polyaluminium chloride (PAC) ho lokela ho etsoa ho pota-potile matšoao a mantlha, ho kenyelletsa le aluminium content, salinity, pH ea boleng le lintho tse sa qhibiliheeng ke metsi, joalo-joalo. Tse latelang ke mekhoa le mekhoa e khethehileng ea tlhahlobo:

1. Ho fumanoa ha aluminium content

Aluminium oxide content ke index ea bohlokoa ea ho lekanya karolo e sebetsang ea PAC. Mokhoa oa ho lemoha haholo-holo ka mokhoa oa ho rarahana ha titration. Mehato e khethehileng ke e latelang:

Tokiso ea reagent: ethylenediaminetetraacetate disodium (EDTA), zinki chloride tharollo e tloaelehileng, tharollo ea potassium fluoride, cresol orange indicator, joalo-joalo.

Mehlala ea ts'ebetso: lekanya lisampole tse nepahetseng tsa PAC, qhibiliha ka metsing, 'me u kenye tharollo ea EDTA e rarahaneng ea li-ion tsa aluminium.

Tlhahlobo ea Titration: EDTA e setseng e ne e ngotsoe ka tharollo e tloaelehileng ea zinc chloride, joale potassium fluoride e ile ea eketsoa ho rarolla li-ion tse rarahaneng tsa aluminium 'me tsa titrated hape ho fihlela qetellong.

Palo: Likahare tsa alumina li baloa ho latela bophahamo ba zinki chloride, boima ba sampole le foromo.

Tlhokomeliso: Laola karabelo pH (sodium acetate buffer ho 3.0 ~ 3.5) 'me u hokahanya teko e se nang letho ho tlosa phoso.

2. Ho lemoha boteng ba letsoai

Letsoai la letsoai le bonahatsa tekanyo ea hydroxylation ho limolek'hule tsa PAC 'me li ama ka ho toba ts'ebetso ea tsona ea flocculation. acid-base titration kapa titration e ka bang teng hangata e sebelisoa.

Titration ea acid-base:

Sampole ea PAC e ile ea etsoa ka hydrochloric acid ho lokolla li-ion tsa hydrogen sehlopheng sa hydroxyl.

Tharollo e tloaelehileng ea sodium hydroxide e ne e lekanyelitsoe ho se nke lehlakore, 'me motheo oa letsoai o ne o baloa ho latela molumo o sebelisitsoeng.

potentiometric titration:

Liphetoho ho pH li ne li behiloe leihlo ho sebelisoa titrator e ikemetseng ea potentiometric mme lintlha tsa ho qetela li ile tsa khethoa ho sebelisoa curve ea titration.

Tlhokomeliso: Mocheso oa bohloeki le karabelo ea reagent e lokela ho laoloa ka thata ho qoba lintlha tsa tšitiso tse amang liphetho.

3. Ho lemoha boleng ba PH

Phaello ea pH e ama botsitso le katleho ea coagulation ea tharollo ea PAC. Mekhoa ea ho lemoha e kenyelletsa:

PH Mokhoa: qoelisa electrode ka tharollo ea PAC 'me u tlalehe liphetho ka mor'a ho tsitsisa boleng (ho nepahala ho tla lekanngoa ho ± 0.01).

PH Mokhoa oa pampiri oa teko: o loketse ho fumanoa ka potlako, empa ho nepahala ho tlase (ho loketse kahlolo ea pele).

4. Lintho tse ling tsa teko

Lintho tse sa keneng ka metsi:

Kamora ho qhibidiha disampole tsa PAC, sefa, omisa masalla a sefe, ebe o se lekanya ho bala karolo ya dintho tse sa qhibidihang.

Ho fumanoa ha litšepe tse boima le litšila:

Limetale tse boima tse kang arsenic le lead li ile tsa khethoa ka mokhoa oa ho sheba atomic absorption spectroscopy (AAS) kapa atomic fluorescence spectroscopy (AFS).

5. Sesebelisoa sa teko le taolo ea boleng

Lisebelisoa tsa mantlha:

Li-titters (acid / base): bakeng sa taolo e nepahetseng ea molumo oa titration.

Ho leka-lekana ha tlhahlobo (ho nepahala 0.0001g): Netefatsa ho nepahala ha boima.

Ovine: bakeng sa ho omisa filthara slag kapa disampole.

taolo ea boleng:

Liteko tsohle li tla latela mekhoa e tloaelehileng ea ts'ebetso le ho lekanya sesebelisoa khafetsa.

Liteko tse kopitsoang li entsoe ka karolelano ho netefatsa ts'epahalo ea data.

akaretsa

Ho fumanoa ha polyaluminium chloride ho hloka tlhahlobo e felletseng ea lik'hemik'hale (joalo ka mokhoa oa titration) le tlhahlobo ea lisebelisoa (joalo ka mokhoa oa spectroscopy), le ho khetha mokhoa oa ho ikamahanya le li-index tse fapaneng. Nakong ea ts'ebetso ea ho lemoha, maemo a liteko a lokela ho laoloa ka thata ho netefatsa ho nepahala le ho hlahisa liphetho.