qhov chaw: Phys.org

Tsis tshua muaj lub ntiaj teb cov ntsiab lus los ntawm ore yog qhov tseem ceeb rau lub neej niaj hnub no, tab sis kev kho kom zoo tom qab mining yog kim, ua phem rau ib puag ncig thiab feem ntau tshwm sim txawv teb chaws.

Ib txoj kev tshawb fawb tshiab piav qhia txog cov pov thawj ntawm txoj cai rau kev tsim cov kab mob, Gluconobacter oxydans, uas yog thawj kauj ruam loj ntawm kev sib ntsib skyrocketing tsawg lub ntiaj teb xav tau nyob rau hauv ib txoj kev uas phim tus nqi thiab kev ua tau zoo ntawm cov tshuaj thermochemical extraction thiab refinement txoj kev thiab huv txaus rau ua tau raws li US ib puag ncig tus qauv.

Buz Barstow, tus kws sau ntawv laus thiab tus pab xibfwb ntawm biological thiab ib puag ncig engineering tau hais tias "Peb tab tom sim los ua ib tus phooj ywg zoo ib puag ncig, tsis tshua muaj kub, tsis tshua muaj siab kom tau txais lub ntiaj teb tsis tshua muaj cov ntsiab lus tawm ntawm lub pob zeb," Cornell University.

Cov ntsiab lus - uas muaj 15 nyob rau hauv lub sij hawm lub sij hawm - yog tsim nyog rau txhua yam ntawm computers, xov tooj ntawm tes, cov ntxaij vab tshaus, microphones, cua turbines, hluav taws xob tsheb thiab conductors rau radars, sonars, LED teeb thiab rechargeable roj teeb.

Thaum Asmeskas ib zaug kho nws tus kheej lub ntiaj teb tsis tshua muaj, qhov kev tsim khoom ntawd tau nres ntau tshaj tsib xyoo dhau los. Tam sim no, kev kho kom zoo ntawm cov ntsiab lus no yuav luag tag nrho hauv lwm lub tebchaws, tshwj xeeb yog Tuam Tshoj.

"Feem ntau ntawm lub ntiaj teb tsis tshua muaj khoom tsim thiab kev rho tawm yog nyob rau hauv txhais tes ntawm cov teb chaws txawv teb chaws," said co-sau Esteban Gazel, tus kws tshaj lij ntawm lub ntiaj teb thiab atmospheric sciences ntawm Cornell. "Yog li ntawd rau kev ruaj ntseg ntawm peb lub teb chaws thiab txoj hauv kev ntawm lub neej, peb yuav tsum tau rov qab mus rau kev tswj hwm cov peev txheej ntawd."

Txhawm rau ua kom tau raws li Asmeskas cov kev xav tau txhua xyoo rau cov ntsiab lus tsis tshua muaj hauv ntiaj teb, kwv yees li 71.5 lab tonnes (~ 78.8 lab tons) ntawm cov ore raw yuav tsum tau rho tawm 10,000 kilograms (~ 22,000 phaus) ntawm cov khoom.

Cov txheej txheem tam sim no vam khom cov pob zeb nrog kub sulfuric acid, ua raws li kev siv cov kuab tshuaj organic cais cov ntsiab lus zoo sib xws ntawm ib leeg hauv kev daws teeb meem.

Barstow tau hais tias "Peb xav paub txog txoj hauv kev los ua kom muaj kab laum uas ua haujlwm zoo dua," Barstow hais.

G. oxydans paub ua cov kua qaub hu ua biolixiviant uas dissolves pob zeb; cov kab mob siv cov kua qaub los rub cov phosphates los ntawm cov ntsiab lus tsis tshua muaj hauv ntiaj teb. Cov kws tshawb fawb tau pib tswj hwm G. oxydans 'genes kom nws rho tawm cov ntsiab lus zoo dua.

Ua li no, cov kws tshawb fawb tau siv thev naus laus zis uas Barstow tau pab tsim, hu ua Knockout Sudoku, uas tso cai rau lawv ua rau 2,733 cov noob hauv G. oxydans 'genome ib zaug. Pab neeg curated mutants, txhua tus muaj cov noob tshwj xeeb tawm, yog li lawv tuaj yeem txheeb xyuas cov noob twg ua lub luag haujlwm kom tau txais cov ntsiab lus tawm ntawm pob zeb.

Gazel tau hais tias "Kuv zoo siab kawg nkaus," "Peb muaj cov txheej txheem ntawm no uas yuav ua tau zoo dua li txhua yam uas tau ua ua ntej."

Alexa Schmitz, tus kws tshawb fawb tom qab kawm tiav hauv Barstow's lab, yog thawj tus kws sau ntawv ntawm txoj kev tshawb no, "Gluconobacter oxydans Knockout Collection Nrhiav Kev Txhim Kho Rare Earth Element Extraction," luam tawm hauv Nature Communications.

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Post lub sij hawm: Nov-19-2021