Flocculation ndi reverse flocculation

KUSINTHA
M'munda wa chemistry, flocculation ndi njira yomwe tinthu tating'onoting'ono timatuluka kuchokera kumadzi amtundu wa flocculent kapena flake kuchokera kuyimitsidwa modzidzimutsa kapena powonjezera chowunikira.Njirayi imasiyana ndi mpweya chifukwa colloid imangoyimitsidwa mumadzimadzi ngati kubalalitsidwa kokhazikika pamaso pa flocculation ndipo sikuti imasungunuka mu njira.
Coagulation ndi flocculation ndizofunikira kwambiri pochiza madzi.The coagulation kanthu ndi destabilize ndi akaphatikiza particles ndi mankhwala mogwirizana pakati coagulant ndi colloid, ndi flocculate ndi precipitate wosakhazikika particles ndi coagulating iwo mu flocculation.

TANTHAUZO LA NTCHITO
Malinga ndi IUPAC, flocculation ndi "njira yolumikizana ndi kumamatira komwe tinthu tambiri timene timabala timapanga magulu akulu akulu".
Kwenikweni, flocculation ndi ndondomeko kuwonjezera flocculant kuti destabilize khola mlandu particles.Pa nthawi yomweyo, flocculation ndi kusanganikirana njira kuti amalimbikitsa agglomeration ndi kumathandiza kuti tinthu kuthetsa.Coagulant wamba ndi Al2 (SO4) 3• 14H2O.

Malo ogwiritsira ntchito

NTCHITO YOPHUNZITSA MADZI
Flocculation ndi mvula imagwiritsidwa ntchito kwambiri poyeretsa madzi akumwa komanso pochiza zimbudzi, madzi amvula komanso madzi otayira m'mafakitale.Njira zochiritsira zodziwika bwino zimaphatikizapo ma gratings, coagulation, flocculation, mpweya, kusefera kwa tinthu ndi kupopera tizilombo.
SURFACE CHEMISTRY
Mu colloidal chemistry, flocculation ndi njira yomwe tinthu tating'onoting'ono timalumikizana pamodzi.Floc imatha kuyandama pamwamba pamadzi (opalescent), kukhazikika pansi pamadziwo (precipitate) kapena kusefa mosavuta mumadziwo.Mchitidwe wa flocculation wa colloid nthaka umagwirizana kwambiri ndi madzi abwino.Kubalalika kwakukulu kwa nthaka ya colloid sikungoyambitsa mwachindunji turbidity ya madzi ozungulira, komanso kumayambitsa eutrophication chifukwa cha kuyamwa kwa zakudya m'mitsinje, nyanja komanso ngakhale sitima zapamadzi.

PHYSICAL CHEMISTRY
Pakuti emulsions, flocculation limafotokoza aggregation wa osakwatiwa omwazika m'malovu kuti munthu m'malovu musati kutaya katundu.Choncho, flocculation ndi sitepe yoyamba (dontho coalescence ndi komaliza gawo kupatukana) amene amatsogolera ku ukalamba kwambiri emulsion.Flocculants amagwiritsidwa ntchito mu mineral beneficiation, koma angagwiritsidwenso ntchito popanga zinthu zakuthupi za chakudya ndi mankhwala.

DEFLOCCULATE

Reverse flocculation ndi yosiyana kwambiri ndi flocculation ndipo nthawi zina amatchedwa gelling.Sodium silicate (Na2SiO3) ndi chitsanzo.Tinthu tating'onoting'ono timene timamwazikana pa pH yapamwamba, kupatula mphamvu yotsika ya ionic ya yankho ndi kulamulira kwa ma cations achitsulo.Zowonjezera zomwe zimalepheretsa colloid kupanga flocculent amatchedwa antiflocculants.Pakusuntha mobwerera kudzera zotchinga za electrostatic, zotsatira za reverse flocculant zitha kuyezedwa ndi kuthekera kwa zeta.Malinga nkunena kwa Encyclopedia of Polymers, antiflocculation ndi “mkhalidwe kapena mkhalidwe wa kumwazikana kwa cholimba m’madzi mmene chinthu cholimba chilichonse chimakhalabe chodziimira pachokha ndi chosagwirizanitsidwa ndi anansi ake (mofanana ndi mmene chinthu cholimba chimakhalira).Kuyimitsidwa kosasunthika kumakhala ndi ziro kapena zokolola zochepa kwambiri ".
Reverse flocculation imatha kukhala vuto m'mafakitale otsukira zimbudzi chifukwa nthawi zambiri kumabweretsa mavuto othetsa matope komanso kuwonongeka kwa utsi.