DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 3-4/2023 str. 30     <-- 30 -->        PDF

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Sažetak
U mnogim zemljama motorne pile sa dvotaktnim benzinskim motorom aktivno se koriste u šumama. Rukovatelji motornom pilom izloženi su štetnim plinovima i česticama koje su sastavni dio ispušnih plinova takvih motornih pila. U ovoj studiji, istraživana je izloženost operatera ugljičnom monoksidu -CO- (ppm) prilikom rada s motornom pilom u režimu rada od 1900-2000 okretaja u minuti (o/min). Pri istraživanju je kao pogonsko gorivo korištena mješavina bezolovnog benzina od 95 oktana i motornog ulja gradacije SAE 10W u iznosu od 2%. Kako bi se istražila prisutnost CO na malim udaljenostima, odnos između vremena izloženosti i udaljenosti do izvora emisije podijeljen je u skupine. Rezultat statističke analize pokazao je da je prosječna količina CO emitirana iz motorne pile bila 1683 ppm na udaljenosti od 0 cm (±4 cm), 343,6 ppm na udaljenosti od 10 cm, 252,3 ppm na udaljenosti od 20 cm i 86,5 ppm na udaljenosti od 30 cm. Analiza varijance prema udaljenosti pokazala je da je količina CO (ppm) statistički značajna (p<0,05). Ako rukovatelj motornom pilom radi vrlo blizu motorne pile, primijetit će se izloženost CO, što se smatra negativnim utjecajem na njihovo zdravlje i radnu učinkovitost. Stoga treba provesti obuku kako bi se povećala svijest o blizini motorne pile i rukovatelja te o važnosti korištenja osobne zaštitne opreme. Uz podršku pri obuci, korištenje nove generacije pogonskih motora motornih pila također treba poticati i promicati kako bi se emisije CO svele na minimum.
Ključne riječi: šumarstvo, proizvodnja drva, dvotaktni benzinski motor, izloženost emisijama, ugljični monoksid, zdravlje operatera