Yo devlope yon nouvo metòd pou sèvi ak seluloz pou retire neyodim nan fatra e-, ki ka mennen nan resiklaj pi efikas.
Neyodim nesesè pou teknoloji pwòp tankou machin elektrik ak turbin van, ak demann pou li te ogmante pa anviwon 400 pousan nan 20 dènye ane yo. Sepandan, min eleman latè ra-sa a gen efè prejidis sou anviwònman an, ki mande plis Nd pou yo rekipere nan fatra e-. Rekiperasyon li te vini tou ak yon kantite defi. Metòd prensipal la pou rekiperasyon komèsyal se ekstraksyon sòlvan, men metòd sa a se ba selektif, chè, ak dirab akòz itilize nan solvang toksik òganik.
Chèchè nan Penn State University te devlope yon nouvo metòd kote nouvo nanoteknoloji yo itilize pou refè neyodim nan seluloz plant yo. Seluloz se bon mache, renouvlab, ak abondan. Travay anvan yo te fè sou adsorban ki baze sou seluloz-, men sa yo pa efikas.
A Penn State team has developed new biotechnology called anionic hair nano cellulose (AHNC), where "hair" refers to cellulose chains attached to the ends of nanoparticles. The hairy layer of the nanoparticle is negatively charged, thereby attracting positively charged Nd ions. This separates Nd from other ions in the aqueous medium, such as iron, calcium, and sodium ions, and aggregates enough Nd particles for efficient recovery.
Amir Sheikhi, assistant professor of chemical engineering and biomedical engineering at Penn State, said: "The process is efficient in terms of removal capacity, selectivity and speed. It can be achieved in seconds by selectively removing elements from some of the tested impurities. Separate the neodymium."
Pwosesis la ka itilize tou pou ekstrè neyodim nan dlo ize endistriyèl, deche min, ak leman pèmanan ki pa itilize ankò.
"This contribution to rare earth recycling will have a strategic and economically viable impact on several industries," Sheikhi said. "The more neodymium we recycle, the more electric and hybrid cars and wind turbines we can make, reducing the pressure on the environment."
Sheikhi te ajoute ke kounye a ekip la ap eksplore diferan avni pou devlope sistèm adsorption kontinyèl oswa semi-pakèt, ki pral pave wout la pou ogmante pwosesis la.
