Cov vuas ua cov lim cua
Cov kws tshawb fawb ntawm University of California, Riverside tau tsim cov ru tsev shingles uas lawv hais tias muaj peev xwm decompose tib yam ntawm cov teeb meem nitrogen oxides nyob rau hauv cov huab cua nyob rau hauv ib lub xyoo raws li lub tsheb nruab nrab tsav tshaj 17 ib zaug. kilometers. Raws li lwm qhov kev kwv yees, ib lab lub ru tsev npog nrog cov vuas zoo li no tshem tawm 21 lab tons ntawm cov oxides no los ntawm huab cua ib hnub.
Tus yuam sij rau lub ru tsev zoo kawg nkaus yog qhov sib xyaw ntawm titanium dioxide. Cov tub ntxhais kawm uas tuaj nrog qhov kev tsim kho no tsuas yog npog cov pobzeb hauv khw muag khoom nrog nws. Ntau qhov tseeb, lawv tau npog lawv nrog ntau txheej ntawm cov khoom no, sim lawv hauv "chamber atmospheric" ua los ntawm ntoo, Teflon thiab PVC kav. Lawv tau nqus cov tshuaj nitrogen tsis zoo rau hauv thiab irradiated cov vuas nrog ultraviolet hluav taws xob, uas ua rau cov titanium dioxide.
Hauv ntau cov qauv, cov txheej txheem reactive raug tshem tawm ntawm 87 mus rau 97 feem pua. yam phem. Interestingly, lub thickness ntawm lub ru tsev nrog ib tug titanium txheej tsis ua ntau txawv rau kev ua hauj lwm efficiency. Txawm li cas los xij, qhov tseeb no yuav yog ib qho tseem ceeb los ntawm kev pom kev lag luam, txij li cov txheej nyias nyias ntawm titanium dioxide tuaj yeem siv tau. Cov neeg tsim khoom tam sim no tab tom xav txog qhov muaj peev xwm ntawm "staining" nrog cov khoom no txhua qhov chaw ntawm lub tsev, nrog rau cov phab ntsa thiab lwm yam khoom vaj tsev.
