Ithimba labacwaningi abavela emanyuvesi aseScotland, ePortugal naseJalimane lisungule inzwa engasiza ekutholeni ukuba khona kwezibulala-zinambuzane ezinamazinga aphansi kakhulu kumasampula amanzi.
Umsebenzi wabo, ochazwe ephepheni elisha elishicilelwe namuhla kumagazini i-Polymer Materials and Engineering, ungenza ukuqapha amanzi kusheshe, kube lula, futhi kushibhile.
Izibulala-zinambuzane zisetshenziswa kabanzi kwezolimo emhlabeni wonke ukuvimbela ukulahleka kwezitshalo. Kodwa-ke, kufanele kuqashelwe, njengoba ngisho nokuvuza okuncane emhlabathini, emanzini angaphansi komhlaba noma emanzini olwandle kungalimaza impilo yabantu, yezilwane kanye neyendawo ezungezile.
Ukuqapha njalo imvelo kubalulekile ukunciphisa ukungcoliswa kwamanzi ukuze kuthathwe isinyathelo ngokushesha lapho kutholwa izibulala-zinambuzane kumasampula amanzi. Njengamanje, ukuhlolwa kwezibulala-zinambuzane kuvame ukwenziwa ngaphansi kwezimo zelebhu kusetshenziswa izindlela ezifana ne-chromatography kanye ne-mass spectrometry.
Nakuba lezi zivivinyo zinikeza imiphumela ethembekile nenembile, zingadla isikhathi futhi zibize kakhulu ukuzenza. Enye indlela ethembisayo ithuluzi lokuhlaziya amakhemikhali elibizwa ngokuthi i-surface-enhanced Raman Scattering (SERS).
Uma ukukhanya kushaya i-molecule, kuhlakazeka ngezikhathi ezahlukene kuye ngesakhiwo se-molecule ye-molecule. I-SERS ivumela ososayensi ukuthi bathole futhi babone inani lama-molecule asele kusampula yokuhlola efakwe ebusweni bensimbi ngokuhlaziya "iminwe" eyingqayizivele yokukhanya okuhlakazwe ama-molecule.
Lo mphumela ungathuthukiswa ngokushintsha ubuso bensimbi ukuze bukwazi ukumunca ama-molecule, ngaleyo ndlela kuthuthukiswe ikhono lenzwa lokubona amazinga aphansi ama-molecule kusampula.
Ithimba locwaningo lihlose ukuthuthukisa indlela entsha yokuhlola ephathekayo engamunca ama-molecule abe amasampula amanzi kusetshenziswa izinto eziphrintiwe ze-3D ezitholakalayo futhi inikeze imiphumela yokuqala enembile ensimini.
Ukuze benze kanjalo, bafunde izinhlobo eziningana ezahlukene zezakhiwo zamaseli ezenziwe ngengxube ye-polypropylene nama-nanotubes e-carbon anezindonga eziningi. Izakhiwo zadalwa kusetshenziswa imicu encibilikisiwe, uhlobo oluvamile lokuphrinta kwe-3D.
Kusetshenziswa amasu endabuko e-wet chemistry, ama-nanoparticles esiliva negolide abekwa phezu kwesakhiwo seseli ukuze kuvunyelwe inqubo yokuhlakazeka kwe-Raman ethuthukisiwe ebusweni.
Bahlole ikhono lezakhiwo eziningana ezahlukene zamaseli aphrintiwe nge-3D lokumunca nokumunca ama-molecule edayi we-organic methylene blue, base bewahlaziya besebenzisa i-Raman spectrometer ephathekayo.
Izinto ezisebenze kahle kakhulu ekuhlolweni kokuqala - imiklamo ye-lattice (izakhiwo zamaseli ezivamile) eziboshwe kuma-nanoparticles esiliva - zabe sezingezwa emgqeni wokuhlola. Inani elincane lemithi yokubulala izinambuzane yangempela (i-Siram ne-paraquat) lafakwa emanzini olwandle kanye namasampula amanzi ahlanzekile futhi labekwa emigqeni yokuhlola ukuze kuhlaziywe i-SERS.
Amanzi athathwa emlonyeni womfula e-Aveiro, ePortugal, kanye nasemapayipini asendaweni efanayo, ahlolwa njalo ukuze kuqashwe kahle ukungcola kwamanzi.
Abacwaningi bathole ukuthi imichilo yakwazi ukuthola ama-molecule amabili ezibulala-zinambuzane ngamanani aphansi njenge-micromole eyodwa, okulingana ne-molecule eyodwa yezibulala-zinambuzane ngama-molecule amanzi ayisigidi.
USolwazi Shanmugam Kumar, waseJames Watt School of Engineering eNyuvesi yaseGlasgow, ungomunye wababhali baleli phepha. Lo msebenzi wakhela ocwaningweni lwakhe lokusetshenziswa kobuchwepheshe bokuphrinta be-3D ukudala ama-lattice esakhiwo akhiwe nge-nanoengineered anezakhiwo ezihlukile.
"Imiphumela yalolu cwaningo lokuqala iyakhuthaza kakhulu futhi ikhombisa ukuthi lezi zinto ezishibhile zingasetshenziswa ukukhiqiza izinzwa ze-SERS ukuthola izibulala-zinambuzane, ngisho noma zisezingeni eliphansi kakhulu."
UDkt. Sara Fateixa wase-CICECO Aveiro Materials Institute eNyuvesi yase-Aveiro, umbhali ohlangene waleli phepha, usungule ama-nanoparticles e-plasma asekela ubuchwepheshe be-SERS. Nakuba leli phepha lihlola ikhono lesistimu lokuthola izinhlobo ezithile zokungcola kwamanzi, ubuchwepheshe bungasetshenziswa kalula ukuqapha ukuba khona kokungcola kwamanzi.
Isikhathi sokuthunyelwe: Jan-24-2024