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Kala-baxa waxaa sidoo kale loo yaqaan wakiilka qoyaanka iyo kala-baxa. Dhinac, wuxuu leeyahay saameyn qoyaan, dhinaca kale, hal dhinac oo ka mid ah kooxdiisa firfircoon ayaa lagu nuugi karaa dusha sare ee midabka oo loo jajabiyey qaybo yaryar, dhinaca kalena waxaa lagu milmaa walxaha salka si loo sameeyo lakabka nuugista (kooxaha nuugista badan, inta ay sii dheer tahay isku xirka silsiladda, lakabka nuugista dhumucdiisuna way sii dhumuc weyn tahay) si loo soo saaro ka-reebis dallac ah (rinji ku salaysan biyo) ama ka-reebis entropy (rinji ku salaysan dareere), si walxaha midabka loo kala firdhiyo oo loogu laalaado rinjiga muddo dheer si looga fogaado dib u soo noqnoqoshada. Tani waxay hubinaysaa xasilloonida kaydinta ee nidaamka rinjiga.
 
Noocyada kala-baxa ee si caadi ah loo isticmaalo.
1. Wakiilka qoynta iyo kala firdhinta Anionic
Inta badan waxay ka kooban yihiin silsilad hydrocarbon ah oo aan polar ahayn, oo si xun loo dallacay iyo koox hydrophilic ah oo polar ah. Labada kooxood waxay ku yaalliin labada daraf ee molecule, iyagoo samaynaya qaab-dhismeed molecular ah oo aan sinnayn hydrophilic iyo oleophilic ah. Noocyadeeda kala duwan waa: sodium oleate C17H33COONa, carboxylate, sulfate (RO-SO3Na), sulfonate (R-SO3Na), iwm. Iswaafajinta kala-firdhiyeyaasha anionic waa mid wanaagsan, polymers-ka polycarboxylic acid, iwm. sidoo kale waxaa lagu dabaqi karaa dahaarka ku salaysan dareeraha waxaana si weyn loogu isticmaalaa kala-firdhiyeyaasha nooca flocculation-ka ee la xakameeyey.

2. Wakiilka qoynta iyo kala firdhinta ee Cationic
Waa iskudhisyo aan saldhig polar ahayn oo si togan u shaqeeya, oo inta badan cusbada amine, cusbada amine ee quaternary, cusbada pyridinium, iwm. Cationic surfactants waxay leeyihiin awood nuugid xooggan waxayna leeyihiin saameyn firidhsan oo wanaagsan oo ku saabsan madowga kaarboonka, oksaydhyada birta ee kala duwan iyo midabyada dabiiciga ah, laakiin waa in la ogaadaa inay si kiimiko ah ula falgalaan kooxda carboxyl ee ku jirta walxaha salka ah, iyo sidoo kale ogow in aan la isku mar la isticmaalin kala firdhiyeyaasha anionic.

3. Nooca firfircoon ee xagjirka xorta ah ee la xakameeyey
Marka labaad, doorka kala-firdhiyaha
1. Hagaaji dhalaalka oo kordhi saamaynta siman.
2. Ka hortag midabka sabeynaya iyo ubaxa.
3. Hagaaji awoodda midabaynta.
4. Yaree dheellitirka oo kordhi rarista midabka.
5. Yaree isku-dhafka, kordhi awoodda dhismaha iyo isticmaalka.
6. Ka hortag dib u gurashada oo kordhi xasilloonida kaydinta.
7. Kordhi faafidda midabka iyo dheregga midabka.
8. Kordhi hufnaanta ama awoodda daboolida.
9. Hagaajinta hufnaanta shiidida iyo yaraynta kharashka wax soo saarka.
10. Ka hortag degitaanka.