OPTIMIZING THE ENVIRONMENTAL FACTORS FOR THE AFFINITY OF ²²²Rn WITH CARBON FIBERS.

OPTIMIZACIJA OKOLJSKIH FAKTORJEV ZA POVEČANJE AFINITETE ²²²Rn NA OGLJIKOVIH VLAKNIH. (Slovenian)

Radon (²²²Rn) is a member of the decay chain of 238U. It has been well documented that ²²²Rn is known to present a risk of lung cancer once inhaled. For practical implementation, this study makes use of activated carbon fibers (ACFs) to uptake ²²²Rn through environmental variations in the temperature, dosage of the adsorbent and circulate conditions. Here, three ACF samples were prepared via different carbonization and activation temperatures from 850 °C to 900 °C. The observed adsorption characteristics show that low temperature and high surface contact of an adsorbent with rich micropores allow the maximum adsorption of ²²²Rn. No such correlation was observed in the case of increasing the circulate conditions. However, there was a direct influence on the maximum adsorption capacity once the circulate conditions decreased. In summary, these findings expand the understanding of the adsorption, dependency on the factors and a proper carbonaceous-material design for reducing ²²²Rn. [ABSTRACT FROM AUTHOR]

Radon (²²²Rn) je člen v verigi radioktivnega razpada 238U. Dobro je znano in dokumentirano, da njegovo inhaliranje predstavlja nevarnost za nastanek pljučnega raka. V članku avtorji predstavljajo praktične možnosti implementacije aktiviranih ogljikovih vlaken (ACFs) za adsorpcijo ²²²Rn in razumevanje vplivov okolja, kot so: sprememba temperature, doza adsorbenta in pogoji cirkulacije (pretoka zraka). Avtorji so pripravili vzorce ACF pri različnih pogojih karbonizacije in temperaturah aktivacije med 850 °C in 900 °C. Opazovanje adsorpcijskih karakteristik je pokazalo, da je za maksimalno kapaciteto adsorpcije ²²²Rn potrebna nizka temperatura aktivacije in visok površinski kontakt adsorbenta z bogatim številom mikropor. Ta povezava pa ni bila ugotovljena v primeru povečane cirkulacije. Vendar pa avtorji ugotavljajo, da na maksimalno adsorpcijsko kapaciteto vpliva zmanjšana cirkulacija. Zaključujejo z ugotovitvijo, da je pričujoča raziskava razširila razumevanje osnov adsorpcije radioaktivnega radona, pokazala na njeno odvisnost od vplivnih faktorjev in našla primerno obliko materiala na osnovi ogljika, ki lahko zmanjša vsebnost ²²²Rn v okolju. [ABSTRACT FROM AUTHOR]

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