Kuongororwa kwemhando shanu dzakasiyana dzehove dzegungwa kwakawanikwa kuti yega bvunzo yekuyera yaive nechaiko chiyero chepurasitiki.
Vatsvakurudzi vakatenga oysters, shrimp, squid, crabs uye sardines kubva kumusika muAustralia uye vakazviongorora vachishandisa nzira ichangoburwa iyo inogona panguva imwe chete kuziva nekuyera mashanu epurasitiki dzakasiyana.
Chidzidzo chakaitwa neUniversity of Exeter neYunivhesiti yeQueensland chakawana kuti squid, gramu shrimp, shrimp, oysters, shrimp, uye sardine aive 0.04 mg, 0.07 mg, oyster 0.1 mg, crab 0.3 mg uye 2.9 mg, zvichiteerana.
Francesca Ribeiro, munyori anotungamira weQUEX Institute, akati: “Tichifunga nezve avhareji yekushandisa, vatengi vezvokudya zvegungwa vanogona kudya inenge 0,7 mg yepurasitiki pavanenge vachidya huni kana squid, nepo vachidya saradhi vanogona kudya zvakanyanya. Kusvika pa30mg yepurasitiki. "Mudzidzi wePhD.
"Kana tichienzanisa, avhareji yehuremu hwese tsanga yemupunga ndeye 30 mg.
"Zvatinowana zvinoratidza kuti huwandu hwepurasitiki huripo pakati pemarudzi akasiyana siyana hwakasiyana zvikuru, uye kuti pane misiyano pakati pevanhu verudzi rumwe chete.
"Kubva pamhando dzezvikafu zvegungwa zvakaedzwa, masadhiini ane epurasitiki zvakanyanya, chinova chiitiko chinoshamisa."
Muzvinafundo Tamara Galloway, munyori weboka reExeter Institute for Global Systems, vakati: "Hatinzwisise zvizere njodzi dzekumedza mapurasitiki kuhutano hwevanhu, asi nzira iyi nyowani ichaita kuti zvive nyore kwatiri kuti tiwane."
Vatsvakurudzi vakatenga hove dzegungwa mbishi-shanu dzesango rebhuruu, oysters gumi, gumi akachekwa tiger prawns, gumi squid sango uye gumi sardine.
Ipapo, ivo vakaongorora mapurasitiki mashanu aigona kuzivikanwa nenzira nyowani.
Zvese izvi mapurasitiki anowanzo shandiswa mupurasitiki kuputira uye ekugadzira machira, uye anowanzo kuwanikwa mune marara marara: polystyrene, polyethylene, polyvinyl chloride, polypropylene uye polymethylmethacrylate.
Mune iyo nzira nyowani, chikafu chekudya chinorapwa nemakemikari kuti iparadze epurasitiki irimo mumuenzaniso. Mhinduro inogadziriswa inoongororwa kuchishandiswa yakanyanya kuomarara inonzi pyrolysis gasi chromatography-mass spectrometry, iyo inogona panguva imwe chete kuziva mhando dzakasiyana dzeplastiki mune samuenzaniso.
Polyvinyl chloride yakawanikwa mune ese masampuli, uye epurasitiki ine yakanyanya kusangana yaive polyethylene.
Microplastics zvidimbu zvidiki zvepurasitiki izvo zvinosvibisa nzvimbo zhinji dzepasi, kusanganisira nyanza. Mhando dzese dzehupenyu hwemumvura dzinoadzidya, kubva kumaruva madiki uye plankton kusvika kumhuka huru.
Kutsvagurudza parizvino kwakaratidza kuti microplastics haingopinde mukudya kwedu kubva kugungwa, asi zvakare inopinda mumuviri wemunhu kubva mumvura yemumabhodhoro, munyu wegungwa, doro neuchi, uye guruva kubva muchikafu.
Iyo nyowani yekuyedza nzira idanho rekujekesa kuti ndezvipi zvisaririra zvemapurasitiki zvinoonekwa zvinokuvadza uye kuongorora njodzi dzinogona kuitika dzekumedza mwero wepurasitiki muchikafu.
