Masana kimiyya sun haɓaka hanyar da ba ta dace da muhalli don dawo da REE daga tokar garwashi ba
Masu bincike a Cibiyar Fasaha ta Georgia, sun ɓullo da hanya mai sauƙi don dawo da abubuwan da ba su da yawa a duniya daga tokar garwashin garwashi ta amfani da ruwa mai ionic da kuma guje wa abubuwa masu haɗari. A cikin wata takarda da aka buga a mujallar Muhalli da Fasaha, masanan sun yi bayanin cewa ruwan ion ruwa ana ɗaukarsa a matsayin rashin lafiyar muhalli kuma ana iya sake amfani da shi. Daya musamman, betainium bis (trifluoromethylsulfonyl) imide ko [Hbet] [Tf2N], zaɓaɓɓen narkar da rare-ƙasa oxides a kan sauran karfe oxides. A cewar masana kimiyya, ruwan ionic shima yana narkar da shi musamman cikin ruwa lokacin da aka yi zafi sannan ya rabu gida biyu idan aka sanyaya. Sanin haka, sai suka kafa don gwada ko zai iya da kyau kuma sun fi son fitar da abubuwan da ake so daga tokar garwashin garwashin da kuma ko za a iya tsabtace ta yadda ya kamata, samar da tsari mai aminci kuma yana haifar da ɓata kaɗan. Don yin haka, ƙungiyar ta yi pretreated tokar gardama tare da maganin alkaline kuma ta bushe shi. Sa'an nan kuma, sun zazzage tokar da aka rataye a cikin ruwa tare da [Hbet][Tf2N], suna haifar da lokaci guda. Lokacin da aka sanyaya, mafita sun rabu. Ruwan ionic ya fitar da sama da kashi 77% na abubuwan da ba kasafai suke cikin duniya ba daga sabo, kuma ya dawo da wani kaso mafi girma (97%) daga toka da ya shafe shekaru a cikin tafki. Sashe na ƙarshe na tsari shine cire abubuwan da ba kasafai ba a duniya daga ruwan ionic tare da dilute acid. Masu binciken sun kuma gano cewa ƙara betaine yayin matakin leaching yana ƙara yawan abubuwan da ba kasafai ake fitar da su a duniya ba. Scandium, yttrium, lanthanum, cerium, neodymium da dysprosium suna cikin abubuwan da aka gano. A ƙarshe, ƙungiyar ta gwada sake amfani da ruwan ionic ta hanyar kurkura shi da ruwan sanyi don cire yawan acid ɗin, ba tare da samun wani canji a cikin yadda ake fitar da shi ta hanyar zagayowar leaching guda uku ba. "Wannan tsarin da ba shi da sauƙi yana samar da mafita mai wadata a cikin abubuwan da ba kasafai ba, tare da ƙayyadaddun ƙazanta, kuma ana iya amfani da su don sake sarrafa abubuwa masu daraja daga yawan tokar garwashin da aka yi a cikin tafkunan ajiya," in ji masanan a cikin wata sanarwa ta kafofin watsa labaru. Sakamakon binciken zai iya zama mahimmanci ga yankuna masu samar da kwal, kamar Wyoming, waɗanda ke neman sake farfado da masana'antar su ta cikin gida ta fuskar raguwar buƙatun mai.
Lokacin aikawa: Jul-04-2022 