Ngo-Oktobha 17, i-2013, i-International Agency for Research on Cancer, i-subsidiary ye-World Health Organization, ikhuphe ingxelo ngokokuqala ngqa ukuba ukungcoliswa komoya ku-carcinogenic kubantu, kwaye eyona nto iphambili yongcoliseko lomoya yi-particulate matter.
Kwimeko-bume yendalo, intwana esemoyeni ikakhulu ibandakanya isanti kunye nothuli oluziswa ngumoya, uthuthu lwentaba-mlilo olukhutshelwa kugqabhuko-dubulo lwentaba-mlilo, umsi nothuli olubangelwa yimililo yamahlathi, ityuwa yolwandle ephuphumayo kumanzi olwandle achachelwe lilanga, kunye nomungu wezityalo.
Ngophuhliso lwentlalo yoluntu kunye nokwandiswa koshishino, imisebenzi yabantu ikwakhupha isixa esikhulu sento encinci emoyeni, efana nothuthu oluvela kwiinkqubo ezahlukeneyo zemizi-mveliso ezifana nokuveliswa kwamandla, isinyithi, i-petroleum, kunye nekhemistri, umsi wokupheka, umsi ophumayo. iimoto, ukutshaya njl.
Intwana esemoyeni ifuna ukuxhalaba kakhulu malunga nesuntswana eliphefumlayo, elibhekiselele kumbindi we-aerodynamic olingana nedayamitha engaphantsi kwe-10 μm, eyi-PM10 esisoloko sisiva ngayo, kwaye i-PM2.5 ingaphantsi kwe-2.5 μm .
Xa umoya ungena kwindlela yokuphefumula yomntu, iinwele zeempumlo kunye ne-mucosa yeempumlo zinokuvala ngokubanzi iinqununu ezininzi, kodwa ezo zingaphantsi kwe-PM10 azikwazi.I-PM10 inokuqokelela kwindlela yokuphefumula ephezulu, ngelixa i-PM2.5 ingangena ngokuthe ngqo kwi-bronchioles kunye ne-alveoli.
Ngenxa yobukhulu bayo obuncinci kunye nendawo enkulu yendawo ethile, i-particulate matter iyakwazi ukubhengeza ezinye izinto, ngoko ke izizathu ze-pathogenesis zinzima, kodwa eyona nto ibalulekileyo kukuba inokubangela isifo senhliziyo, isifo sokuphefumla kunye nomhlaza wemiphunga.
I-PM2.5, esidla ngokuyikhathalela, eneneni ithatha umlinganiselo omncinci wamasuntswana aphefumlayo, kodwa kutheni unikela ingqalelo ngakumbi kwi-PM2.5?
Ngokuqinisekileyo, enye ibangelwa kupapasho lweendaba, kwaye enye kukuba i-PM2.5 icolekile kwaye kulula ukufunxa izinto ezingcolisa izinto eziphilayo kunye neentsimbi ezinzima ezifana ne-polycyclic aromatics hydrocarbons, eyandisa kakhulu amathuba okuba ne-carcinogenic, i-teratogenic, kunye ne-mutagenic.
Ixesha lokuposa: Mar-16-2022