Ubuchwepheshe be-Reverse Osmosis (RO) budonse ukunaka okukhulu ngenxa yokusebenzisana okubanzi ekukhipheni usawoti emanzini anosawoti kanye nolwandle. Ifilimu eyinhlanganisela yefilimu ezacile (TFC) i-polyamide (PA) i-osmosis ehlehla ulwelwesi, ehlanganisa ungqimba oluminyene oluhlukanisayo kanye nosendlalelo oluyizimbotshana olusekelayo, kube yimikhiqizo ehamba phambili kulo mkhakha. Kodwa-ke, ukungeneka okuphansi kolwelwesi lwe-PA RO kanye nokungcoliswa kwe-TFC reverse osmosis membranes kunciphisa ukusetshenziswa okusabalele kwe-PA RO TFC membranes. googletag.cmd.push(umsebenzi() {googletag.display('div-gpt-ad-1449240174198-2′); });
Ukuhlanganiswa kolwelwesi lwe-nanocomposite kufakazele ukuthi kuyindlela enhle kakhulu yokuhlanganisa izinzuzo ze-polymeric kanye ne-inorganic nanomaterials. Izici zemvelo zolwelwesi lwe-osmosis ehlane zingathuthukiswa ngokulungisa kahle ukwakheka nokwakheka. Isibonelo, i-hydrotalcite (HT) yahlakazwa ngesisombululo samanzi futhi yafakwa ku-matrix ye-PA esigabeni se-polymerization ehlangene ukuze kudalwe iziteshi zokuthutha amanzi.
Ulwelwesi oluwumphumela lubonisa ukukhetha okuphezulu kokungena kanye nokwanda kokugeleza kwamanzi ngaphandle kokudela ukuxosha usawoti. Ngaphezu kwalokho, ukuguqulwa kwe-membrane, okuhlanganisa ukufakwa kwe-nanoparticle, ukumbozwa kwendawo, nokuxhunyelelwa, kuboniswe njengendlela ephumelelayo yokuvimbela i-biofouling. Phakathi kwazo, ukuxhunyelelwa ama-anti-fouling ejenti kuma-nanoparticles ashumekwe ku-matrix ye-PA kuyisu elihle kakhulu lokudlulisela izakhiwo ezilwa nokungcolisa ukubuyisela ulwelwesi lwe-osmosis ngaphandle kokulimaza i-matrix ye-PA.
Ama-nanoparticles e-HT acebile ngamaqembu e-hydroxyl, angasabela namaqembu e-siloxy we-silane coupling agents ukuze kuzuzwe ukuxhunyelelwa kwe-antifouling. Ngakho-ke, inoveli ye-TFC ehlehlisa ulwelwesi lwe-osmosis olunokukhethwa okuphezulu kanye nezakhiwo zokulwa nokungcola ingatholwa ngokusebenzisa ama-nanoparticles e-HT njengama-dopants kungqimba lwe-PA kanye nokuxhunyelelwa ama-anti-fouling asebenzayo aqukethe ama-silane coupling agents endaweni yolwelwesi.
USolwazi Wang Jian ovela ku-Institute of Desalination and Integrated Seawater Utilization, uProf. Ma Zhong wase-Shandong University of Science and Technology, uDkt. Tian Xinxia ovela e-Chinese Academy of Sciences, ugqugquzelwe yizimpawu ze-HT nanoparticles nama-silane coupling agents aqukethe i-quaternary ammonium usawoti. , kanye namalungu eqembu labo ndawonye. Imizamo yenziwe yokuthuthukisa uhlobo olusha lwe-reverse osmosis ulwelwesi olunokusebenza okuphezulu okuzinzile kwesikhathi eside ngokuthuthukisa ngasikhathi sinye ukukhetha kwasekuqaleni kokwazi ukungena nokunqanda ukungcoliswa.
Umsebenzi wabo uthuthukise kakhulu ukusebenza kwe-TFC PA reverse osmosis membranes futhi wanikeza iseluleko esibalulekile sezobuchwepheshe ngekusasa lokuchithwa kwamanzi olwandle. Ucwaningo lushicilelwe kumagazini iFrontiers of Environmental Science & Engineering.
Kulolu cwaningo, ama-nanoparticles e-Mg-Al-CO3 HT afakwe ungqimba lwe-PA ngokuhlakazeka kusixazululo sezinto eziphilayo ngesikhathi sokupholisa ngobunye. Ukufakwa kwe-HT kudlala indima embaxambili, ukuthuthukisa ukugeleza kwamanzi nokusebenza njengendawo yokuxhunyelelwa. Ukufakwa kwe-HT kwandisa ukugeleza kwamanzi ngaphandle kokudela ukwenqatshwa kukasawoti, kunxephezela ukulahlekelwa okubangelwa ukusabela kokuxhunyelelwa okulandelayo. Indawo eveziwe ye-HT isebenza njengendawo yokuxhunyelelwa ye-antifouling agent dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride (DMOT-PAC).
Inhlanganisela ye-HT incorporation kanye nokuxhunyelelwa kwe-DMOTPAC ibuyisela emuva ulwelwesi lwe-osmosis olunokukhethwa okuphezulu kokungena kanye nezakhiwo zokulwa nokungcolisa. Ukugeleza kwamanzi kwe-PA-NT-0.06 kwakungu-49.8 l/m2 · h, okuyi-16.4% ephakeme kunaleyo ye-membrane yokuqala. Izinga lokwenqatshwa kukasawoti we-PA-HT-0.06 lalingu-99.1%, eliqhathaniswa nelolwelwesi lokuqala. Ngokuphathelene nokungcoliswa kwe-lysozyme okukhokhiswa kabi, ukutholakala kwe-aqueous flux ye-membrane eguquliwe kwakuphakeme kunolwelwesi lwangempela (isb, 86.8% we-PA-HT-0.06 ngokumelene no-78.2% we-PA-original). Izinga lomsebenzi wokubulala amagciwane we-PA-HT-0.06 ngokumelene ne-Escherichia coli ne-Bacillus subtilis lalingu-97.3% no-98.7%, ngokulandelana.
Lolu cwaningo lungelokuqala ukubika ukwakhiwa kwezibopho eziqinile phakathi kwe-DMOTPAC ne-HT nanoparticles eshumekwe kumatrices e-PA ukuze kukhiqizwe ama-osmosis ahlehlayo anokukhetha okuphezulu kokungena kanye nezindawo zokulwa nokungcola. Ukufakwa kwe-nanoparticles edidiyelwe kanye nokuxhunyelelwa kweqembu elisebenzayo kunika amandla ukuthuthukiswa kwama-membrane e-osmosis e-reverse ene-high permeability selectivity kanye nezakhiwo zokulwa nokungcola.
Ulwazi olwengeziwe: U-Xinxia Tian et al., Ukulungiswa kolwelwesi lwe-osmosis olubuyela emuva olunokukhethwa okuphezulu kanye nezakhiwo zokulwa nokungcoliswa kwamanzi olwandle, i-Frontiers in Environmental Science and Engineering (2021). I-DOI: 10.1007/s11783-021-1497-0
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Isikhathi sokuthumela: Jan-04-2023