"Kupisa kwekushisa, mapurasitiki akawanda anogona kuguma muzvokudya kana mvura yekunwa," anodaro Rolf Halden, mutungamiriri weCenter for Healthcare Environmental Engineering paBiodesign Institute paArizona State University.
Zvizhinji zvezvigadzirwa zvepurasitiki zvinoburitsa zvidiki zvemakemikari muzvinwiwa kana chikafu chazviri. Sezvo tembiricha uye nguva yekuratidzira inowedzera, zvisungo zvemakemikari mupurasitiki zvinowedzera kuputsika, uye makemikari anowanzo guma mune chikafu kana mvura. Maererano neU.S. Food and Drug Administration (FDA), uwandu hwemakemikari anobudiswa iduku zvikuru kuti akonzere zvinetso zvoutano, asi nokufamba kwenguva, madhamu maduku anogona kutungamirira kuzvinetso zvikuru.
Bhodhoro rinoraswa pazuva rinopisa rezhizha
Mabhodhoro mazhinji emvura aunowana pamasherufu esupamaketi anogadzirwa kubva mupurasitiki inonzi polyethylene terephthalate (PET). Chidzidzo che2008 neArizona State University vaongorori vakaratidza kuti kupisa kunowedzera sei kuburitswa kweantimony kubva kuPET plastiki. Antimony inoshandiswa kugadzira mapurasitiki uye inogona kuva muchetura muhuwandu hwakawanda.
Mukuedza kwemurabhoritari, zvakatora mazuva makumi matatu nemasere kuti mabhodhoro emvura apise kusvika 38 madhigirii kuti aone mazinga eantimony anopfuura nhungamiro dzekuchengetedza. "Kupisa kunobatsira kuputsa zvisungo zvemakemikari mumapurasitiki, zvakadai semabhodhoro epurasitiki, uye makemikari aya anogona kutamira kune zvinwiwa zvaanenge ari," anonyora kudaro Julia Taylor, musayendisiti anotsvakurudza mapurasitiki paYunivhesiti yeMissouri.
Muna 2014, masayendisiti akawana akakwira antimony uye muchetura komisheni inonzi BPA mumvura inotengeswa mumabhodhoro emvura eChinese. Muna 2016, masayendisiti akawana yakakwira antimony mumvura yemubhodhoro inotengeswa muMexico. Zvidzidzo zvese zviri zviviri zvakaedza mvura pamamiriro anopfuura 65 °, inova ndiyo yakaipisisa mamiriro.
Sekureva kweboka reInternational Bottled Water Association indasitiri, mvura yemubhodhoro inofanirwa kuchengetwa pasi pemamiriro akafanana nezvimwe zvigadzirwa zvekudya. “Mvura yemubhodhoro inoita basa rakakosha munjodzi. Kana iwe uri pamucheto wekupererwa nemvura, hazvina basa kuti mvura iri mukati.
Nokudaro, mabhodhoro epurasitiki haafaniri kuonekwa kune chiedza chezuva kwenguva yakareba, uyewo haafaniri kusara mumotokari muzhizha.
Zvakadini nemidziyo inogona kushandiswazve?
Mabhodhoro emvura anodzokororwa anowanzo gadzirwa kubva kune yakakwira-density polyethylene (HDPE) kana polycarbonate. HDPE inonyanya kugamuchirwa nezvirongwa zvekudzokorodza, kusiyana nepolycarbonate.
Kuita kuti mabhodhoro aya ave akaoma uye achipenya, vagadziri vanowanzoshandisa Bisphenol-A kana BPA. BPA inokanganisa endocrine. Izvi zvinoreva kuti inogona kukanganisa mashandiro ehomoni akajairwa uye zvinotungamira kune huwandu hwematambudziko ehutano ane njodzi. Tsvagiridzo inobatanidza BPA negomarara rezamu. US Food and Drug Administration (FDA) inorambidza kushandiswa kweBPA mumabhodhoro evana nemabhodhoro asiri ekudira. Vazhinji vagadziri vakapindura kunetsa kwevatengi nekubvisa BPA.
"BPA-yemahara hazvireve zvakachengeteka," Taylor anodaro. Akataura kuti bisphenol-S, iyo inowanzo shandiswa seimwe nzira, "yakafanana neBPA uye ine zvimiro zvakafanana."
Ngozi dzacho dzakakwirira sei?
“Kana ukanwa rimwe bhodhoro remvura rePET pazuva, zvinokuvadza utano hwako here? Zvimwe kwete,” anodaro Halden. "Asi kana ukanwa mabhodhoro makumi maviri pazuva, saka mubvunzo wekuchengeteka wakasiyana zvachose." Anocherekedza kuti iyo cumulative mhedzisiro ine hukuru hunogona kukanganisa hutano.
Ini pachangu, Halden anofarira bhodhoro remvura resimbi pamusoro pepurasitiki inogona kushandiswazve paanorova mugwagwa. “Kana usingade purasitiki mumuviri wako, usawedzera muvanhu,” anodaro.