Teknụzụ ọhụrụ iji melite oke nhọrọ na mgbochi mmebi nke membran osmosis na-agbanwe.

Teknụzụ Reverse osmosis (RO) adọtala ọtụtụ nlebara anya n'ihi ike ya dị ukwuu maka ịsa mmiri brackish na mmiri mmiri. Ihe nkiri ihe nkiri dị mkpa (TFC) polyamide (PA) na-atụgharị osmosis membranes, nke nwere akwa nkewa dị oke na oyi akwa nkwado porous, bụ ngwaahịa na-eduga na mpaghara a. Agbanyeghị, mwepu dị ala nke akpụkpọ ahụ PA RO yana mmebi nke akpụkpọ ahụ TFC na-agbanwe osmosis na-egbochi ojiji PA RO TFC zuru ebe niile. googletag.cmd.push(ọrụ() {googletag.display('div-gpt-ad-1449240174198-2');});
Ngwakọta nke nanocomposite membranes egosila na ọ bụ ụzọ magburu onwe ya maka ijikọta uru nke polymeric na inorganic nanomaterials. Enwere ike imezi njirimara eke nke reverse osmosis membranes site na imeziwanye ihe mejupụtara na nhazi ya. Dịka ọmụmaatụ, a gbasasịa hydrotalcite (HT) na ngwọta mmiri ma tinye ya na matrix PA na ọkwa nke interfacial polymerization iji mepụta ọwa mmiri na-ebufe mmiri.
Membran ndị a na-esi na ya pụta na-egosiputa oke permeability selectivity na mmụba mmiri na-asọba na-enweghị ịchụ àjà nnu. Na mgbakwunye, ngbanwe akpụkpọ ahụ, gụnyere ntinye nanoparticle, mkpuchi elu, na grafting, egosila na ọ bụ ụzọ dị irè iji gbochie biofouling. N'ime ha, ịdonye ihe mgbochi na-emebi emebi na nanoparticles agbakwunyere na matriks PA bụ atụmatụ magburu onwe ya iji nye ihe ndị na-emebi emebi iji tụgharịa akpụkpọ anụ osmosis na-emebighị matriks PA.
HT nanoparticles bara ụba na otu hydroxyl, nke nwere ike meghachi omume na otu siloxy nke ndị na-ejikọta silane iji nweta grafting antifouling. Ya mere, enwere ike nweta akwụkwọ akụkọ TFC reverse osmosis membrane nwere nnukwu nhọrọ na ihe na-emebi emebi site na iji HT nanoparticles dị ka dopants na oyi akwa PA na grafting mgbochi arụrụ arụ ọrụ nke nwere silane njikọ n'elu akpụkpọ ahụ.
Prọfesọ Wang Jian sitere na Institute of Desalination and Integrated Seawater Utilization, Prof. Ma Zhong si Shandong University of Science and Technology, Dr. Tian Xinxia si Chinese Academy of Sciences, sitere n'ike mmụọ nsọ nke àgwà HT nanoparticles na silane njikọ njikọ nwere quaternary. ammonium nnu. , na ndị otu ha ọnụ. Emeela mbọ iji mepụta ụdị akpụkpọ anụ osmosis ọhụrụ nke nwere nnukwu arụmọrụ kwụsiri ike ogologo oge site n'otu oge na-emeziwanye nhọrọ nhọrọ permeability mbụ na mgbochi adịghị mma.
Ọrụ ha mere ka arụmọrụ nke TFC PA reverse osmosis membranes ma nye ndụmọdụ ọrụ aka bara uru maka ọdịnihu nke ịsa mmiri mmiri. E bipụtara ọmụmụ ihe ahụ n'akwụkwọ akụkọ Frontiers of Environmental Science & Engineering.
Na ọmụmụ a, Mg-Al-CO3 HT nanoparticles e webatara n'ime a oyi akwa PA site mgbasa na organic ngwọta n'oge interfacial polymerization. Ntinye nke HT na-arụ ọrụ abụọ, na-eme ka mmiri na-asọba ma na-eje ozi dị ka saịtị grafting. Ntinye nke HT mụbara mmiri na-asọpụta na-enweghị ịchụ aja nnu, na-akwụ ụgwọ maka mfu nke mmeghachi omume grafting na-esote kpatara. Elu nke ekpughere nke HT na-eje ozi dị ka saịtị grafting maka onye na-eme ihe mgbochi dimethyloctadecyl [3- (trimethoxysilyl) propyl] ammonium chloride (DMOT-PAC).
Nchikota HT incorporation na DMOTPAC grafting na-enye mgbanwe osmosis membranes na elu permeability selectivity na mgbochi mmetọ Njirimara. Mmiri mmiri nke PA-NT-0.06 bụ 49.8 l / m2 · h, nke dị 16.4% karịa nke akpụkpọ ahụ mbụ. Ogo nke ịjụ nnu PA-HT-0.06 bụ 99.1%, nke yiri nke akpụkpọ ahụ mbụ. N'ihe gbasara mmetọ lysozyme na-adịghị mma, mgbake mmiri mmiri nke akpụkpọ ahụ a gbanwere dị elu karịa nke akpụkpọ ahụ mbụ (dịka, 86.8% maka PA-HT-0.06 na 78.2% maka PA-nke mbụ). Ogo nke ọrụ bactericidal nke PA-HT-0.06 megide Escherichia coli na Bacillus subtilis bụ 97.3% na 98.7%, n'otu n'otu.
Ọmụmụ ihe a bụ nke mbụ na-akọ na nguzobe nke covalent bond n'etiti DMOTPAC na HT nanoparticles agbakwunyere na matrices PA iji mepụta membran osmosis na-agbanwe agbanwe na nhọrọ nhọrọ dị elu na ihe mgbochi. Ntinye nke nanoparticles agbakwunyere na otu grafting na-arụ ọrụ na-enyere aka mmepe nke membran osmosis nke nwere oke nhọrọ nhọrọ permeability na ihe ndị na-emebi emebi.
Ozi ndị ọzọ: Xinxia Tian et al., Nkwadebe nke akpụkpọ anụ osmosis na-agbanwe agbanwe na nhọrọ dị elu na ihe mgbochi na-adịghị mma maka nsị mmiri mmiri, Frontiers in Environmental Science and Engineering (2021). DOI: 10.1007/s11783-021-1497-0
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