Oosonzululwazi baphuhlisa indlela ehambelana nokusingqongileyo yokubuyisela iREE kuthuthu lwempukane yamalahle
Abaphandi kwiZiko leTekhnoloji laseGeorgia, baphuhlise indlela elula yokubuyisela izinto zomhlaba ezinqabileyo kuthuthu lwempukane yamalahle kusetyenziswa ulwelo lwe-ayoni nokuphepha izinto eziyingozi. Kwiphepha elipapashwe kwijenali yeSayensi yeNdalo kunye neTekhnoloji, izazinzulu zichaza ukuba ulwelo lwe-ionic luthathwa njengolungenabungozi kokusingqongileyo kwaye lunokusetyenziswa kwakhona. Enye ngokukodwa, i-betainium bis(trifluoromethylsulfonyl)imide okanye [Hbet][Tf2N], ngokukhetha inyibilikisa iioksidi zomhlaba ezinqabileyo phezu kwezinye iioksidi zesinyithi. Ngokutsho kwezazinzulu, ulwelo lwe-ionic lukwanyibilika ngokukodwa emanzini xa lushushu kwaye lwahlulahlulwe lube ngamanqanaba amabini xa lupholile. Ukwazi oku, bamisela ukuvavanya ukuba iya kutsala ngokufanelekileyo nangokukhethekayo izinto ezinqwenelekayo kuthuthu lwempukane yamalahle kwaye ingaba inokucocwa ngokusebenzayo na, ukwenza inkqubo ekhuselekileyo kwaye ivelise inkunkuma encinci. Ukwenza oko, iqela ligalele uthuthu lwempukane yamalahle ngesisombululo sealkaline laze lomisa. Emva koko, bafudumeza uthuthu oluxhonywe emanzini nge [Hbet][Tf2N], besenza isigaba esinye. Xa zipholile, izisombululo ziyahlukana. Ulwelo lwe-ayoni lukhuphe ngaphezu kwe-77% yezinto ezinqabileyo zomhlaba kwimathiriyeli entsha, kwaye lufumene ipesenti ephezulu nangaphezulu (97%) kuthuthu olunemozulu embi oluchithe iminyaka kwidama lokugcina. Inxalenye yokugqibela yenkqubo yayikukuhluba izinto ezinqabileyo zomhlaba kulwelo lwe-ionic kunye ne-asidi edibeneyo. Abaphandi baye bafumanisa ukuba ukongeza i-betaine ngexesha lenyathelo le-leaching kwandisa inani lezinto ezinqabileyo zomhlaba ezikhutshiweyo. I-Scandium, i-yttrium, i-lanthanum, i-cerium, i-neodymium kunye ne-dysprosium ziphakathi kwezinto ezifunyenweyo. Okokugqibela, iqela lavavanya ukuphinda kusetyenziswe ulwelo lwe-ionic ngokuyihlanza ngamanzi abandayo ukuze isuse iasidi engaphezulu, ingafumani tshintsho ekusebenzeni kwayo kokutsalwa ngemijikelo emithathu yokucoca. "Le ndlela yenkunkuma ephantsi ivelisa isisombululo esityebileyo kwizinto ezinqabileyo zomhlaba, ezinokungcola okulinganiselwe, kwaye zingasetyenziselwa ukuphinda zisetyenziswe izinto ezixabisekileyo ezivela kubuninzi be-coal fly ash egcinwe kumachibi okugcina," izazinzulu zathi kwingxelo yeendaba. Iziphumo zinokubaluleka kwimimandla evelisa amalahle, efana ne-Wyoming, ejonge ukubuyisela ishishini labo lasekhaya xa bejongene nokuncipha kwemfuno yamafutha efosili.
Ixesha lokuposa: Jun-28-2021