Shenhai Kuputika-Uchapupu
Asphalt inopisa inoburitsa magasi anonyanya kuumbwa nemahydrocarbon akasiyana, kunyanya polycyclic inonhuwira hydrocarbons.
Kuumbwa kweasphalt kunosanganisira asphaltenes, resin, akazara uye anonhuwirira hydrocarbons.
Nekuda kwekunyanya kupisa kwekupisa kana kuwedzera evaporation kwechisikigo, peturu, uye marasha tara asphalt, kudziya kunogadzira zvinhu zvidiki zvemamorekuru, kunyanya refu-cheni uye anonhuwirira hydrocarbons, zvinonyanya kukosha mamorekuru akadai se naphthalene, anthracene, phenanthrene, uye benzo[a]pyrene.
Polycyclic anonhuwirira hydrocarbons ane muchetura uye mamwe anozivikanwa carcinogens.