qhov chaw: newscenter

Rare ntiaj teb yam(REES) likelanthanumthiabneodymiumyog cov khoom tseem ceeb ntawm cov khoom siv hluav taws xob niaj hnub no, los ntawm cov xov tooj ntawm tes thiab hnub ci vaj huam sib luag mus rau satellites thiab hluav taws xob tsheb. Cov hlau hnyav no tshwm sim nyob ib puag ncig peb, txawm tias nyob rau hauv me me. Tab sis qhov kev thov tseem nce ntxiv thiab vim tias lawv tshwm sim hauv qhov tsis tshua muaj siab, cov txheej txheem ntawm kev rho tawm REEs tuaj yeem ua tsis tau zoo, kev ua qias tuaj ib puag ncig, thiab cuam tshuam rau kev noj qab haus huv ntawm cov neeg ua haujlwm.

Tam sim no, nrog nyiaj txiag los ntawm Lub Chaw Haujlwm Saib Xyuas Kev Tshawb Fawb Advanced Research Projects Agency (DARPA) Environmental Microbes raws li BioEngineering Resource (EMBER) program, San Diego State University cov kws tshawb fawb tau tsim cov txheej txheem rho tawm siab heev nrog lub hom phiaj ntawm kev txhawb nqa cov khoom siv hauv tsev ntawm REEs.

"Peb tab tom sim tsim cov txheej txheem tshiab rau kev rov qab los uas yog ib puag ncig tus phooj ywg thiab muaj kev nyab xeeb dua," said biologist thiab tus thawj kws tshawb fawb Marina Kalyuzhnaya.

Ua li no, cov kws tshawb fawb yuav coj mus rau hauv lub ntuj tsim ntawm methane-consuming bacteria nyob rau hauv huab cua heev kom ntes REEs los ntawm ib puag ncig.

"Lawv xav tau lub ntiaj teb tsawg tsawg los ua ib qho ntawm cov tshuaj tiv thaiv enzymatic tseem ceeb hauv lawv txoj kev metabolic," said Kalyuzhnaya.

REEs suav nrog ntau lub ntsiab lus lanthanide ntawm lub sijhawm teem sijhawm. Hauv kev koom tes nrog University of California, Berkeley thiab Pacific Northwest National Laboratory (PNNL), cov kws tshawb fawb SDSU npaj yuav thim rov qab cov txheej txheem lom neeg uas tso cai rau cov kab mob los sau cov hlau los ntawm ib puag ncig. Nkag siab txog cov txheej txheem no yuav qhia txog kev tsim cov hluavtaws tsim cov proteins uas khi nrog qhov tshwj xeeb rau ntau hom lanthanides, raws li biochemist John Love. PNNL pab neeg yuav txheeb xyuas cov caj ces txiav txim siab ntawm cov kab mob extremophilic thiab REE accumulating kab mob, thiab tom qab ntawd qhia lawv cov REE uptake.

Pab neeg no yuav hloov kho cov kab mob los tsim cov hlau khi cov protein nyob rau saum npoo ntawm lawv lub hlwb, hais tias Hlub.

REEs kuj muaj ntau nyob rau hauv kuv tailings, cov khoom pov tseg ntawm qee cov hlau ore, xws li txhuas.

Kalyuzhnaya hais tias "Kuv cov tailings yog pov tseg uas tseem muaj ntau yam khoom siv hauv nws," Kalyuzhnaya hais.

Txhawm rau ntxuav thiab sau cov REEs nyob rau hauv, cov slurries ntawm dej thiab crushed pob zeb yuav khiav los ntawm ib tug biofilter uas muaj cov kab mob hloov, tso cai rau tus tsim proteins nyob rau saum npoo ntawm cov kab mob los xaiv khi rau REEs. Zoo li cov kab mob methane-hlub uas tau ua haujlwm raws li lawv cov qauv, cov kab mob txhim kho yuav zam qhov pH, kub thiab dej qab ntsev, cov xwm txheej pom hauv kuv cov tailings.

Cov kws tshawb fawb yuav koom tes nrog ib tus neeg koom tes hauv kev lag luam, Palo Alto Research Center (PARC), lub tuam txhab Xerox, txhawm rau luam tawm cov khoom ntxeem tau, sorbent siv rau hauv biofilter. Cov tshuab luam ntawv bioprinting no yog tus nqi qis thiab ua kom muaj peev xwm thiab tau npaj ua kom muaj txiaj ntsig zoo thaum siv dav rau cov ntxhia rov qab.

Ntxiv rau kev sim thiab ua kom zoo rau biofilter, pab pawg kuj tseem yuav tau tsim txoj hauv kev los sau cov lanthanides huv si los ntawm biofilter nws tus kheej, raws li ib puag ncig engineer Christy Dykstra. Cov kws tshawb fawb tau koom tes nrog lub tuam txhab pib ua lag luam, Phoenix Tailings, txhawm rau kuaj thiab kho cov txheej txheem rov qab los.

Vim tias lub hom phiaj yog tsim kom muaj kev lag luam zoo tab sis ib puag ncig tus phooj ywg txheej txheem rau kev rho tawm REEs, Dykstra thiab ntau tus neeg koom tes yuav txheeb xyuas cov nqi ntawm cov txheej txheem piv nrog rau lwm cov thev naus laus zis rau kev rov qab lanthanides, tab sis kuj muaj kev cuam tshuam ib puag ncig.

"Peb cia siab tias nws yuav muaj txiaj ntsig ntau ntawm ib puag ncig thiab cov nqi hluav taws xob qis dua piv rau qhov tam sim no siv," said Dykstra. "Ib lub cev zoo li no yuav ntau dua ntawm cov kab mob biofiltration passive, nrog tsawg zog nkag. Thiab tom qab ntawd, theoretically, tsawg dua siv cov kuab tshuaj tsis zoo ib puag ncig thiab cov khoom zoo li ntawd. Ntau cov txheej txheem tam sim no yuav siv cov kuab tshuaj hnyav heev thiab tsis muaj kev cuam tshuam ib puag ncig. "

Dykstra kuj tseem sau tseg tias txij li cov kab mob rov ua dua lawv tus kheej, cov thev naus laus zis microbe tau rov ua dua tshiab rau tus kheej, "yog tias peb yuav tsum siv cov tshuaj, peb yuav tsum txuas ntxiv tsim tshuaj lom neeg ntau ntxiv."

"Txawm hais tias nws yuav raug nqi me ntsis ntxiv, tab sis nws tsis ua mob rau ib puag ncig, uas yuav ua rau muaj kev nkag siab zoo," Kalyuzhnaya hais.

Lub hom phiaj ntawm DARPA-nyiaj pab project yog muab pov thawj-ntawm-lub tswv yim ntawm bio-driven REE-rov qab technology nyob rau hauv plaub lub xyoos, uas Kalyuzhnaya hais tias yuav xav tau ib tug lub tswv yim lub zeem muag thiab ib tug ntoo khaub lig-kev qhuab qhia.

Nws hais ntxiv tias qhov project yuav muab SDSU cov tub ntxhais kawm tiav nrog lub sijhawm los koom nrog kev tshawb fawb ntau yam "thiab pom tias cov ntsiab lus tuaj yeem loj hlob los ntawm cov tswv yim nkaus xwb txhua txoj hauv kev rau kev sim ua qauv qhia."

---

Post lub sij hawm: Apr-17-2023