Ososayensi bakha indlela evumelana nemvelo yokuthola i-REE emlotheni wempukane yamalahle
Abacwaningi e-Georgia Institute of Technology, baye benza indlela elula yokubuyisela izakhi zomhlaba ezingavamile emlotheni wezimpukane zamalahle besebenzisa uketshezi lwe-ayoni nokugwema izinto eziyingozi. Ephepheni elishicilelwe kumagazini i-Environmental Science & Technology, ososayensi bachaza ukuthi uketshezi lwe-ionic lubhekwa njengoluyingozi emvelweni futhi lungasetshenziswa kabusha. Eyodwa ikakhulukazi, i-betainium bis(trifluoromethylsulfonyl)imide noma i-[Hbet][Tf2N], ngokukhetha incibilikisa ama-oxide avela emhlabeni ngaphezu kwamanye ama-oxide ensimbi. Ngokusho kososayensi, uketshezi lwe-ionic luphinde luncibilike lube emanzini uma lushisiwe bese luhlukana lube izigaba ezimbili lapho lupholile. Ukwazi lokhu, bahlela ukuhlola ukuthi ngabe kuzokhipha yini izakhi ezifiselekayo emlotheni wempukane yamalahle kanye nokuthi zingahlanzwa kahle, zenze inqubo ephephile futhi edala udoti omncane. Ukuze lenze njalo, ithimba lagcoba umlotha wempukane yamalahle ngekhambi le-alkali lawusula. Bese, bashisisa umlotha olenga emanzini nge-[Hbet][Tf2N], okwenza isigaba esisodwa. Lapho selehlile, izixazululo zihlukaniswa. Uketshezi lwe-ionic lukhiphe ngaphezu kuka-77% wezinto zomhlaba eziyivelakancane ezintweni ezintsha, futhi lubuyise amaphesenti aphezulu kakhulu (97%) emlotheni osuphelelwe yisimo sezulu obuchithe iminyaka echibini lokugcina. Ingxenye yokugcina yenqubo kwakuwukuhlubula izakhi zomhlaba eziyivelakancane oketshezini lwe-ayoni nge-asidi ehlanjululwayo. Abacwaningi baphinde bathola ukuthi ukwengeza i-betaine ngesikhathi sesinyathelo sokuvuza kwandisa amanani ezinto ezingandile zomhlaba ezikhishiwe. I-Scandium, i-yttrium, i-lanthanum, i-cerium, i-neodymium ne-dysprosium bekuphakathi kwezinto ezitholakele. Ekugcineni, ithimba lihlole ukusebenziseka kabusha koketshezi lwe-ionic ngokuluhlanza ngamanzi abandayo ukuze likhiphe i-asidi eningi, lingatholanga ushintsho ekusebenzeni kahle kwalo kokukhipha ngemijikelezo emithathu yokuhlanza. "Le ndlela yokulahla imfucuza ephansi ikhiqiza isisombululo esicebile ezintweni ezingavamile, ezinokungcola okulinganiselwe, futhi ingasetshenziselwa ukuvuselela izinto eziyigugu ezivela eningi lomlotha wempukane yamalahle egcinwe emachibini okugcina," kusho ososayensi esitatimendeni sabezindaba. Okutholakele kungase futhi kubaluleke kakhulu ezifundeni ezikhiqiza amalahle, njenge-Wyoming, ezibheke ukusungula kabusha imboni yazo yasendaweni lapho zibhekene nokwehla kwesidingo sezinto ezimbiwa phansi.
Isikhathi sokuthumela: Jun-28-2021