Theknoloji ea Reverse Osmosis (RO) e hohetse tlhokomelo e ngata ka lebaka la ts'ebeliso e pharaletseng ea ho tlosa letsoai le letsoai la metsi a leoatle. Thin film composite (TFC) polyamide (PA) reverse osmosis membranes, e nang le lera le letenya la karohano le lera le tšehelitsoeng ke porous, e bile lihlahisoa tse etelletseng pele lebaleng lena. Leha ho le joalo, ho kenella ho tlase ha li-membrane tsa PA RO le ho silafala ha li-membrane tsa TFC reverse osmosis li fokotsa ts'ebeliso e atileng ea li-membrane tsa PA RO TFC. googletag.cmd.push(mosebetsi() {googletag.display('div-gpt-ad-1449240174198-2′); });
Ho qaptjoa ha li-membrane tsa nanocomposite ho ipakile e le mokhoa o motle oa ho kopanya melemo ea polymeric le inorganic nanomaterials. Litšobotsi tsa tlhaho tsa li-membrane tsa reverse osmosis li ka ntlafatsoa ka ho lokisa sebopeho le sebopeho hantle. Ka mohlala, hydrotalcite (HT) e ile ea qhalakanngoa ka tharollo e nang le metsi 'me e kenyelelitsoe ho PA matrix sethaleng sa polymerization ea sefahleho ho etsa litsela tsa ho tsamaisa metsi.
Li-membrane tse hlahisoang li bonts'a khetho e phahameng ea ho kenella le ho eketsa phallo ea metsi ntle le ho nyelisa letsoai. Ho phaella moo, ho fetoloa ha membrane, ho kenyelletsa le ho kenngoa ha nanoparticle, ho roala ka holim'a metsi, le ho hlomathisoa, ho bontšitsoe e le mokhoa o atlehang oa ho thibela likokoana-hloko. Har'a tsona, ho hlomathisa li-anti-fouling li-nanoparticles tse kentsoeng ka har'a matrix ea PA ke leano le letle la ho fana ka thepa e khahlanong le litšila ho khutlisa membrane ea osmosis ntle le ho senya matrix a PA.
Li-nanoparticles tsa HT li na le lihlopha tse ngata tsa hydroxyl, tse ka sebetsanang le lihlopha tsa siloxy tsa li-silane coupling agents ho finyella antifouling grafting. Ka hona, buka e ncha ea TFC reverse osmosis membrane e nang le khetho e phahameng le thepa e khahlanong le litšila e ka fumanoa ka ho sebelisa li-nanoparticles tsa HT joalo ka li-dopants moahong oa PA le ho hlomathisa li-anti-fouling tse sebetsang tse nang le li-silane coupling agents holim'a membrane.
Prof. Wang Jian ho tsoa Setsing sa ho Hlakola letsoai le Tšebeliso e Kopanetsoeng ea Metsi a Leoatleng, Moprofesa Ma Zhong oa Univesithi ea Shandong ea Saense le Theknoloji, Ngaka Tian Xinxia oa Chinese Academy of Sciences, a susumelitsoe ke litšobotsi tsa HT nanoparticles le silane coupling agents tse nang le quaternary. letsoai la ammonium. , le litho tsa sehlopha sa bona hammoho. Boiteko bo entsoe ho nts'etsapele mofuta o mocha oa membrane ea reverse osmosis e nang le ts'ebetso e phahameng e tsitsitseng ea nako e telele ka ho ntlafatsa ka nako e ts'oanang ho ntlafatsa khetho ea pele ea permeability le anti-fouling.
Mosebetsi oa bona o ntlafalitse haholo ts'ebetso ea TFC PA reverse osmosis membranes le ho fana ka likeletso tsa bohlokoa tsa tekheniki bakeng sa bokamoso ba ho ntša letsoai metsing a leoatle. Boithuto bona bo phatlalalitsoe koranteng ea Frontiers of Environmental Science & Engineering.
Thutong ena, Mg-Al-CO3 HT nanoparticles e kenyelelitsoe ho PA layer ka ho hasana ka tharollo ea manyolo nakong ea polymerization ea sefahleho. Ho kenyelletsoa ha HT ho na le karolo e 'meli, ho matlafatsa phallo ea metsi le ho sebetsa joalo ka sebaka sa ho hlomathisa. Ho kenyelletsoa ha HT ho ile ha eketsa phallo ea metsi ntle le ho tela ho lahloa ha letsoai, ho lefella tahlehelo e bakiloeng ke karabelo e latelang ea grafting. Sebaka se pepeneng sa HT se sebetsa e le sebaka sa ho hlomathiseletsoa bakeng sa antifouling agent dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride (DMOT-PAC).
Motsoako oa kenyelletso ea HT le DMOTPAC grafting endows reverse osmosis membranes tse nang le khetho e phahameng ea ho kenella le thepa ea anti-fouling. Phallo ea metsi ea PA-NT-0.06 e ne e le 49.8 l / m2 · h, e leng 16.4% e phahameng ho feta ea lera la pele. Tekanyo ea ho hana letsoai la PA-HT-0.06 e ne e le 99.1%, e ka bapisoang le ea lera la pele. Mabapi le tšilafalo e mpe ea lysozyme, ho hlaphoheloa ha metsi a lera le fetotsoeng ho ne ho phahame ho feta lera la pele (mohlala, 86,8% bakeng sa PA-HT-0.06 khahlanong le 78.2% bakeng sa PA-original). Tekanyo ea tšebetso ea bactericidal ea PA-HT-0.06 khahlano le Escherichia coli le Bacillus subtilis e ne e le 97.3% le 98.7% ka ho latellana.
Boithuto bona ke ba pele ba ho tlaleha ho theoa ha litlamo tsa covalent lipakeng tsa DMOTPAC le HT nanoparticles tse kentsoeng ka har'a matrices a PA ho hlahisa li-membrane tsa reverse osmosis tse nang le matla a phahameng a permeability le thepa ea anti-fouling. Ho kenyelletsoa ha li-nanoparticles tse kopantsoeng le lihlopha tse sebetsang tsa grafting li etsa hore ho be le li-membrane tsa reverse osmosis tse nang le bokhoni bo phahameng ba ho khetholla le thepa e khahlanong le litšila.
Lintlha tse ling: Xinxia Tian et al., Tokisetso ea lera la reverse osmosis le nang le lisebelisoa tse phahameng tsa ho khetha le tse thibelang litšila bakeng sa ho ntša letsoai metsing a leoatle, Frontiers in Environmental Science and Engineering (2021). DOI: 10.1007/s11783-021-1497-0
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