Ithimba labacwaningi abavela emanyuvesi aseScotland, Portugal naseJalimane lenze inzwa engasiza ekutholeni ukuba khona kwezibulala-zinambuzane ekugxilweni okuphansi kakhulu kumasampula amanzi.
Umsebenzi wabo, ochazwe ephepheni elisha elishicilelwe namuhla kumagazini i-Polymer Materials and Engineering, ungenza ukuqapha kwamanzi kusheshe, kube lula, futhi kungabizi.
Izibulala-zinambuzane zisetshenziswa kakhulu kwezolimo emhlabeni wonke ukuvimbela ukulahleka kwezitshalo.Kodwa-ke, kufanele kuqashelwe, njengoba ngisho nokuvuza okuncane emhlabathini, emanzini angaphansi noma emanzini olwandle kungabangela ukulimala empilweni yomuntu, yezilwane kanye nemvelo.
Ukuqapha imvelo okuvamile kubalulekile ukuze kuncishiswe ukungcoliswa kwamanzi ukuze kuthathwe izinyathelo ezisheshayo lapho kutholwa izibulala-zinambuzane kumasampula amanzi.Njengamanje, ukuhlolwa kwezibulala-zinambuzane kuvame ukwenziwa ngaphansi kwezimo zaselabhorethri kusetshenziswa izindlela ezifana ne-chromatography kanye ne-mass spectrometry.
Nakuba lezi zivivinyo zinikeza imiphumela enokwethenjelwa nenembile, zingadla isikhathi futhi kubize ukwenza.Enye indlela ethembisayo ithuluzi lokuhlaziya amakhemikhali elibizwa ngokuthi i-surface-enhanced Raman Scattering (SERS).
Lapho ukukhanya kushaya i-molecule, ihlakazeka ngamaza ahlukene kuye ngesakhiwo samangqamuzana e-molecule.I-SERS ivumela ososayensi ukuthi bathole futhi bakhombe inani lama-molecule ayinsalela kusampula yokuhlola ekhangiswe endaweni yensimbi ngokuhlaziya "izigxivizo zeminwe" ezihlukile zokukhanya okuhlakazwe ama-molecule.
Lo mphumela ungathuthukiswa ngokushintsha indawo yensimbi ukuze ikwazi ukukhangisa ama-molecule, ngaleyo ndlela ithuthukise ikhono lenzwa lokuthola ukugxiliswa okuphansi kwama-molecule kusampula.
Ithimba labacwaningi lihlele ukuthuthukisa indlela yokuhlola entsha, ephatheka kakhudlwana engakhanga ama-molecule abe amasampula amanzi kusetshenziswa izinto eziphrintiwe ze-3D ezitholakalayo futhi inikeze imiphumela enembile yokuqala emkhakheni.
Ukuze benze kanjalo, bafunde izinhlobo eziningana zezinhlaka zamaseli ezenziwe ngengxube ye-polypropylene kanye nama-nanotube ekhabhoni anezindonga eziningi.Izakhiwo zakhiwe kusetshenziswa imicu encibilikisiwe, uhlobo oluvamile lokuphrinta kwe-3D.
Kusetshenziswa amasu amakhemikhali amanzi endabuko, ama-nanoparticles esiliva negolide afakwa phezu kwesakhiwo seseli ukuze kunikwe amandla inqubo yokusabalalisa i-Raman ethuthukisiwe.
Bahlole ikhono lezinhlaka ezihlukene ze-3D eziphrintiwe zeseli ukuze bamunce futhi bakhangise ama-molecule wodayi wemvelo we-methylene eluhlaza okwesibhakabhaka, base bewahlaziya kusetshenziswa i-Raman spectrometer ephathekayo.
Izinto ezisebenze kahle kakhulu ekuhlolweni kokuqala - imiklamo ye-lattice (izakhiwo zamaselula ngezikhathi ezithile) eziboshwe kuma-nanoparticles esiliva - zabe zengezwa emgqeni wokuhlola.Izibulala-zinambuzane zangempela (i-Siram ne-paraquat) zengezwa emanzini olwandle namasampula amanzi ahlanzekile futhi zafakwa emicu yokuhlola ukuze kuhlaziywe i-SERS.
Amanzi athathwa emlonyeni womfula e-Aveiro, ePortugal, nakompompi basendaweni efanayo, abahlolwa njalo ukuze baqaphe ngokuphumelelayo ukungcoliswa kwamanzi.
Abacwaningi bathola ukuthi imichilo ikwazile ukuthola ama-molecule amabili e-pesticide ekugxilweni okuphansi njenge-micromole eyi-1, okulingana ne-molecule eyodwa yesibulala-zinambuzane esigidini ngasinye samanzi.
USolwazi Shanmugam Kumar, waseJames Watt School of Engineering eNyuvesi yaseGlasgow, ungomunye wababhali baleli phepha.Lo msebenzi wakhela ocwaningweni lwakhe ekusetshenzisweni kobuchwepheshe bokuphrinta be-3D ukuze kwakheke ama-lattice esakhiwo se-nanoengineered anezakhiwo eziyingqayizivele.
"Imiphumela yalolu cwaningo lokuqala ikhuthaza kakhulu futhi ikhombisa ukuthi lezi zinto ezishibhile zingasetshenziswa ukukhiqiza izinzwa ze-SERS ukuthola izibulala-zinambuzane, ngisho nasezindaweni eziphansi kakhulu."
UDkt. Sara Fateixa ovela ku-CICECO Aveiro Materials Institute e-University of Aveiro, umlobi-mbhali wephepha, uthuthukise ama-nanoparticles e-plasma asekela ubuchwepheshe be-SERS.Nakuba leli phepha lihlola ikhono lesistimu lokuthola izinhlobo ezithile zokungcola kwamanzi, ubuchwepheshe bungasetshenziswa kalula ukuze kuqashwe ukuba khona kokungcola kwamanzi.
Isikhathi sokuthumela: Jan-24-2024