Iqela labaphandi abavela kwiiyunivesithi zaseSkotlani, ePortugal naseJamani baye baphuhlisa inzwa enokukunceda ukufumanisa ubukho be-pesticides kwiindawo eziphantsi kakhulu kwiisampuli zamanzi.
Umsebenzi wabo, ochazwe kwiphepha elitsha elipapashwe namhlanje kwijenali yePolymer Materials and Engineering, inokwenza ukujonga amanzi ngokukhawuleza, kulula, kwaye kungabizi.
Amayeza okubulala izitshabalalisi asetyenziswa kakhulu kwezolimo kwihlabathi jikelele ukuthintela ilahleko yezityalo.Nangona kunjalo, kufuneka kulumke, njengoko nokuvuza okuncinci emhlabeni, kumanzi aphantsi komhlaba okanye amanzi olwandle kunokubangela ingozi kwimpilo yabantu, yezilwanyana kunye nokusingqongileyo.
Ukuhlola okusingqongileyo rhoqo kubalulekile ukuze kuncitshiswe ukungcoliseka kwamanzi ukuze kuthathwe amanyathelo akhawulezileyo xa kubhaqwe imichiza yokutshabalalisa izinambuzane kwiisampulu zamanzi.Okwangoku, uvavanyo lwesitshabalalisi luqhele ukwenziwa phantsi kweemeko zaselabhoratri kusetyenziswa iindlela ezinje ngechromatography kunye ne-mass spectrometry.
Ngelixa ezi mvavanyo zibonelela ngeziphumo ezithembekileyo nezichanekileyo, zinokutya ixesha kwaye kuyabiza ukwenza.Enye indlela ethembisayo sisixhobo sokuhlalutya imichiza ebizwa ngokuba yi-surface-enhanced Raman Scattering (SERS).
Xa ukukhanya kubetha iamolekyuli, isasazeka kwiifrikhwensi ezahlukeneyo ngokuxhomekeke kulwakhiwo lwemolekyuli yemolekyuli.I-SERS ivumela izazinzulu ukuba zichonge kwaye zichonge isixa seemolekyuli ezishiyekileyo kwisampulu yovavanyo ebhengezwe kumphezulu wesinyithi ngokuhlalutya "uphawu lweminwe" olukhethekileyo olusasazwe ziimolekyuli.
Esi siphumo sinokuphuculwa ngokuguqula umphezulu wesinyithi ukwenzela ukuba ikwazi ukubhengeza iimolekyuli, ngaloo ndlela iphucula isakhono senzwa yokufumanisa ukuxinana okuphantsi kweemolekyuli kwisampulu.
Iqela lophando lizimisele ukuphuhlisa indlela entsha yovavanyo ephathwayo enokuthi ibhengeze iimolekyuli kwiisampulu zamanzi zisebenzisa izinto ezikhoyo eziprintiweyo ze-3D kunye nokubonelela ngeziphumo zokuqala ezichanekileyo kwintsimi.
Ukwenza oko, bafunde iindidi ezininzi ezahlukeneyo zezakhiwo zeeseli ezenziwe ngomxube wepolypropylene kunye neenanotubes zekhabhoni ezinodonga oluninzi.Izakhiwo zadalwa kusetyenziswa imicu etyhidiweyo, uhlobo oluqhelekileyo loshicilelo lwe-3D.
Ukusebenzisa ubuchule bekhemistri obumanzi bemveli, isilivere kunye ne-nanoparticles yegolide zifakwe kumphezulu wesakhiwo seseli ukwenzela ukuba inkqubo yokusasazwa kweRaman iphuculwe.
Bavavanya isakhono sezinto ezahlukeneyo ze-3D eziprintiweyo zezixhobo zeseli ukufunxa kunye ne-adsorb iimolekyuli zedayi ephilayo ye-methylene eluhlaza, emva koko bazihlalutya besebenzisa i-Raman spectrometer.
Izinto eziye zasebenza kakuhle kwiimvavanyo zokuqala - i-lattice designs (i-periodic cellular structures) ebotshelelwe kwi-nanoparticles yesilivere-zaye zongezwa kumgca wokuvavanya.Izixa ezincinci ze-insecticide zangempela (i-Siram kunye ne-paraquat) zongezwa kumanzi olwandle kunye neesampuli zamanzi ahlambulukileyo kwaye zibekwe kwimicu yokuvavanya ukuhlalutya kwe-SERS.
Amanzi athathwa emlonyeni womlambo e-Aveiro, ePortugal, nakwiimpompo ezikwindawo enye, ezivavanywa rhoqo ukujonga ngokufanelekileyo ukungcoliseka kwamanzi.
Abaphandi bafumanise ukuba imichilo ikwazile ukubona iimolekyuli ezimbini ze-pesticide kwiindawo eziphantsi njenge-1 micromole, elilingana nemolekyuli ye-pesticide kwisigidi seemolekyuli zamanzi.
Unjingalwazi uShanmugam Kumar, ovela kwiSikolo sobuNjineli sikaJames Watt kwiYunivesithi yaseGlasgow, ungomnye wababhali beli phepha.Lo msebenzi wakha kuphando lwakhe ekusebenziseni iteknoloji yoshicilelo lwe-3D ukwenza i-nanoengineered structural lattices eneempawu ezizodwa.
"Iziphumo zolu phononongo lwangaphambili zikhuthaza kakhulu kwaye zibonisa ukuba ezi zixhobo zinexabiso eliphantsi zingasetyenziselwa ukuvelisa izinzwa ze-SERS zokubona izibulali-zinambuzane, nokuba ziphantsi kakhulu."
UDkt Sara Fateixa ovela kwiCICECO Aveiro Materials Institute kwiYunivesithi yaseAveiro, umbhali-mbhali wephepha, uye wavelisa i-plasma nanoparticles exhasa iteknoloji ye-SERS.Ngelixa eli phepha lihlola ukukwazi kwenkqubo ukubona iintlobo ezithile zokungcola kwamanzi, iteknoloji ingasetyenziswa ngokulula ukujonga ubukho bokungcola kwamanzi.
Ixesha lokuposa: Jan-24-2024