Sangano reUS Environmental Protection Agency (EPA) riri kuronga kurambidza kushandiswa kwakawanda kwe dichloromethane (methylene chloride) pasi peToxic Substances Control Act (TSCA), iyo inotonga mutemo wemakemikari weUS. Dichloromethane chinhu chinoshandiswa zvakanyanya murabhoritari muzvigadzirwa zvakaita seglue, sealant, degreasers uye pendi thinners. Ndicho chinhu chechipiri kudzorwa pasi pemaitiro eTsca akagadziriswazve, akagadzirwa muna 2016, mushure measbestos gore rapfuura.
Chikumbiro cheEPA chinoda kuti pave nekurambidzwa kugadzirwa, kugadziriswa uye kugoverwa kwe dichloromethane pakushandiswa kwese kwevatengi, kurambidzwa kushandiswa kwemaindasitiri nemabhizinesi mazhinji, uye kudzora kwakasimba kwenzvimbo dzebasa pakushandiswa kwezvimwe zvinhu.
Kushandiswa kwemethylene chloride murabhoritari kuchadzorwa nechirongwa ichi uye kuchadzorwa nehurongwa hwekudzivirira makemikari pabasa, kwete kurambidzwa. Chirongwa ichi chinoganhurira kuratidzwa kwebasa kusvika paavhareji yezvikamu zviviri pamiriyoni (ppm) kwemaawa masere uye 16 ppm kwemaminitsi gumi nemashanu.
Chikumbiro Chitsva cheEPA Chichaisa Miganhu Mitsva Pamazinga Ekushandiswa kweDichloromethane muLaboratori
Sangano reEnvironmental Protection Agency rakaona njodzi yekukanganisa hutano hwevanhu kubva mukufema uye kubatwa nemethylene chloride paganda, kusanganisira kukuvadza kwetsinga dzemuviri uye migumisiro pachiropa. Sangano iri rakaonawo kuti kufema kwenguva refu uye kubatwa neganda nechinhu ichi kunowedzera njodzi yekubatwa nekenza.
Achizivisa chikumbiro chesangano iri musi wa20 Kubvumbi, Mutungamiriri weEPA Michael Regan akati: "Sainzi iri shure kwemethylene chloride yakajeka uye mhedzisiro yayo inogona kukonzera migumisiro yakakomba kuhutano uye kunyange rufu. Vanhu vazhinji vakarasikirwa nevadikanwi nekuda kwechepfu yakakomba." mhuri".
Kubva muna 1980, vanhu vanosvika 85 vakafa nekuda kwekubatwa nemethylene chloride zvakanyanya, sekureva kweEPA. Vazhinji vavo vaive vashandi vekugadzirisa dzimba, vamwe vavo vakadzidziswa zvizere uye vakapfeka midziyo yekudzivirira. Sangano iri rakati vanhu vazhinji vari "kusangana nemigumisiro yakaipa uye yenguva refu yehutano, kusanganisira mamwe marudzi ekenza."
Munguva yehutongi hwaObama, Environmental Protection Agency yakaona kuti mapendi ekugadzira pendi ane methylene chloride aive "nengozi isina musoro yekukuvadza hutano." Muna 2019, sangano iri rakarambidza kutengeswa kwezvigadzirwa zvakadaro kune vatengi, asi rakamiswa kudare nevanotsigira hutano hwevanhu avo vakataura kuti mitemo yacho haina kukwana uye kuti matanho akaomarara aifanira kunge akatorwa nekukurumidza.
EPA inotarisira kuti shanduko zhinji dzayo itsva dzakarongwa dzichaitwa zvizere mukati memwedzi gumi nemishanu uye dzinosvika pakurambidzwa kwe52 muzana pakugadzirwa kunofungidzirwa kwegore negore kweTSCA. Sangano iri rakati pakushandiswa kwakawanda kwedichloromethane, rinokurudzira kurambidzwa, zvigadzirwa zvakasiyana zvinowanzo kuwanikwa nemutengo mumwe chete.
Asi American Chemical Council (ACC), iyo inomiririra makambani emakemikari ekuUS, yakabva yaramba EPA, ichiti methylene chloride "chinhu chakakosha" chinoshandiswa kugadzira zvigadzirwa zvakawanda zvevatengi.
Mukupindura chirevo cheEPA, boka reindasitiri rakaratidza kunetseka kuti izvi "zvaizounza kusava nechokwadi uye kuvhiringidzika kwemutemo" kune miganhu iripo yeUS Occupational Safety and Health Administration methylene chloride exposure. ACC inosimbisa kuti EPA haisati "yaona kuti zvakakosha" kuisa mimwe miganhu yekushandiswa pabasa kune yakatotarwa.
Sangano rekubatsira vanhu rakapomerawo EPA mhosva yekukundikana kuongorora zvizere kukanganiswa kwezvirongwa zvayo pakutengeserana kwezvinhu. "Kukura kwekudzikiswa kwekugadzirwa nekukurumidza kwakadaro kunogona kukanganisa zvakanyanya kutengesa zvinhu kana vagadziri vaine zvibvumirano zvavanofanira kutevedzera, kana kana vagadziri vakasarudza kumisa kugadzira zvachose," ACC yakanyevera, "zvinokanganisa kushandiswa kwakakosha, kusanganisira kutengesa mishonga nezvimwe zvinoshandiswa zvakakosha zvinonzwa ngura zvinoitwa neEPA."
EPA inosimudzira kurambidzwa kwezvinhu zvinotengeswa nevanhu kwenguva refu asi inobvumira kushandiswa kwebhizinesi
Kugadziriswazve kweMutemo weToxic Substances Control Act, uyo unotungamira kudzorwa kwemakemikari muUnited States, kwave kushanda.
Mushumo weUK House of Commons unoratidza kuti hurumende inofanira kuita basa rayo zvakanyanya mukugadzirisa nyaya dzinokanganisa sainzi.
Chinyorwa cheCassini cheNASA chakawana guruva nechando zvakatenderedza Nyika zvine makore mazana mashoma emamiriyoni ekuberekwa
© Royal Society of Chemistry document.write(new Date().getFullYear()); Nhamba yekunyoresa yerubatsiro: 207890