Kafukufuku wamitundu isanu yosiyanasiyana ya nsomba adapeza kuti mayeso aliwonse omwe anali ndi mayeso anali ndi pulasitiki.
Ofufuzawo adagula oyster, shrimp, squid, nkhanu ndi sardines pamsika ku Australia ndikuwasanthula pogwiritsa ntchito njira yatsopano yomwe ingadziwe ndikuyeza mitundu isanu yapulasitiki.
Kafukufuku wopangidwa ndi University of Exeter ndi University of Queensland adapeza kuti squid, gram shrimp, shrimp, oyster, shrimp, ndi sardines anali 0.04 mg, 0.07 mg, oyster 0.1 mg, nkhanu 0.3 mg ndi 2.9 mg, motsatana.
Francesca Ribeiro, mlembi wamkulu wa QUEX Institute, anati: “Poganizira kuchuluka kwa anthu ogula, anthu ogula nsomba amatha kudya pulasitiki pafupifupi 0,7 mg akamadya oyster kapena squid, pomwe kudya sardines kumatha kudya kwambiri. Mpaka 30mg wapulasitiki. "Wophunzira wa PhD.
"Poyerekeza, pafupifupi kulemera kwa njere iliyonse ya mpunga ndi 30 mg.
"Zomwe tapeza zikuwonetsa kuti kuchuluka kwa pulasitiki komwe kulipo pakati pa mitundu yosiyanasiyana kumasiyana kwambiri, komanso kuti pali kusiyana pakati pa anthu amtundu womwewo.
"Kuchokera pamitundu yoyesedwa ndi nsomba, sardine ili ndi pulasitiki wapamwamba kwambiri, zomwe ndi zotsatira zodabwitsa."
Pulofesa Tamara Galloway, wolemba nawo bungwe la Exeter Institute for Global Systems, adati: "Sitikumvetsetsa bwino kuwopsa kwakumwera mapulasitiki kuumoyo wa anthu, koma njira yatsopanoyi itithandizira kuti tipeze."
Ofufuzawa anagula nsomba zosaphika za nkhanu zam'madzi nkhanu zamtundu wabuluu, ma oyster khumi, nkhanu khumi za akambuku olimidwa, squid khumi zakutchire ndi sardine khumi.
Kenako, adasanthula mapulasitiki asanu omwe amatha kudziwika ndi njira yatsopanoyi.
Mapulasitiki onsewa amagwiritsidwa ntchito kwambiri m'mapulasitiki ndi nsalu zopangira, ndipo amapezeka m'mabwinja am'madzi: polystyrene, polyethylene, polyvinyl chloride, polypropylene ndi polymethylmethacrylate.
Mwa njira yatsopanoyi, minofu yazakudya imathandizidwa ndimankhwala osungunula pulasitiki yomwe ilipo mchitsanzo. Njira yothetsera vutoli imawunikidwa pogwiritsa ntchito njira yovuta kwambiri yotchedwa pyrolysis gas chromatography-mass spectrometry, yomwe imatha kuzindikira mitundu yosiyanasiyana ya mapulasitiki mchitsanzo.
Polyvinyl chloride imapezeka m'mitundu yonse, ndipo pulasitiki wokhala ndi ndende yayikulu kwambiri ndi polyethylene.
Microplastics ndi tizidutswa tating'ono kwambiri ta pulasitiki tomwe tingaipitse malo ambiri padziko lapansi, kuphatikizapo nyanja. Mitundu yonse ya zamoyo zam'madzi zimadya, kuyambira mphutsi zazing'ono ndi plankton mpaka nyama zazikulu.
Kafukufuku mpaka pano wawonetsa kuti microplastics sikuti imangolowa zakudya zathu kuchokera m'nyanja, komanso imalowa m'thupi la munthu kuchokera m'madzi am'mabotolo, mchere wamchere, mowa ndi uchi, komanso fumbi lazakudya.
Njira yatsopano yoyeserera ndi gawo limodzi pofotokozera kuchuluka kwa mapulasitiki omwe amaonedwa ngati owopsa ndikuwunika ngozi zomwe zingachitike polowerera pulasitiki wazakudya.
