Indlela entsha yokuhlaziya, ebonakala ngokucaca okuphezulu kanye nokuzwela okunamandla, ithuthukiswe ngempumelelo ukuze kutholakale i-4,4′-methylene-bis-(2-chloroaniline), eyaziwa kakhulu ngokuthi “i-MOCA,” emchameni womuntu. Kubalulekile ukuqaphela ukuthi i-MOCA iyi-carcinogen ebhalwe kahle, enobufakazi obunobuthi obuqinisekisa ukuthi i-carcinogen iyingozi ezilwaneni zaselabhorethri ezifana namagundane, amagundane, nezinja.
Ngaphambi kokusebenzisa le ndlela esanda kuthuthukiswa ezindaweni zomsebenzi zangempela, ithimba locwaningo laqala ngokwenza ucwaningo lwesikhashana olusebenzisa amagundane. Inhloso eyinhloko yalolu cwaningo lwangaphambi kokwelashwa kwakuwukuhlonza nokucacisa izici ezithile ezibalulekile ezihlobene nokukhishwa komchamo kwe-MOCA kumodeli yezilwane—kufaka phakathi izici ezifana nesilinganiso sokukhishwa, izindlela ze-metabolic, kanye nesikhathi samazinga atholakalayo—ukubeka isisekelo esiqinile sesayensi sokusetshenziswa okulandelayo kwendlela kumasampula abantu.
Ngemva kokuphothulwa nokuqinisekiswa kwesifundo sangaphambi kokwelashwa, le ndlela yokuthola umchamo esuselwe kumchamo yasetshenziswa ngokusemthethweni ukuhlola izinga lokuchayeka emsebenzini ku-MOCA phakathi kwabasebenzi emabhizinisini ezimboni aseFrance. Ububanzi bocwaningo buhlanganise izinhlobo ezimbili eziyinhloko zezimo zomsebenzi ezihlobene eduze ne-MOCA: enye kwakuyinqubo yokukhiqiza yezimboni ye-MOCA uqobo, kanti enye kwakuwukusetshenziswa kwe-MOCA njenge-ejenti yokwelapha ekukhiqizweni kwama-polyurethane elastomers, isimo esivamile sokusetshenziswa embonini yamakhemikhali nezinto zokwakha.
Ngokuhlolwa okukhulu kwamasampula omchamo aqoqwe kubasebenzi kulezi zimo, ithimba locwaningo lithole ukuthi amazinga okukhishwa komchamo kwe-MOCA abonise ukwehluka okubanzi. Ngokukhethekile, amazinga okukhishwa ayesukela emazingeni angabonakali—achazwa njengangaphansi kwama-microgram angu-0.5 ngelitha—kuya ku-1,600 micrograms ngelitha. Ngaphezu kwalokho, lapho ama-metabolite e-N-acetyl e-MOCA ekhona kumasampula omchamo, amazinga awo ayephansi njalo futhi ngokuphawulekayo kunokugxila kwe-compound yomzali (i-MOCA) kumasampula afanayo, okubonisa ukuthi i-MOCA ngokwayo iyindlela eyinhloko ekhishwa emchameni futhi iyisibonakaliso esithembeke kakhulu sokuvezwa.
Sekukonke, imiphumela etholwe kulolu hlolo olukhulu lokuchayeka emsebenzini ibonakale ibonakalisa kahle nangokunembile amazinga okuchayeka e-MOCA aphelele abasebenzi abahloliwe, njengoba amazinga okuchayeka atholakale ayehlobene eduze nohlobo lomsebenzi wabo, isikhathi sokuchayeka, kanye nezimo zendawo yokusebenza. Ngaphezu kwalokho, okubalulekile ocwaningweni kwakuwukuthi ngemva kokuba izinqumo zokuhlaziya seziqediwe futhi kwaqaliswa izinyathelo zokuvimbela eziqondiwe ezindaweni zokusebenza—njengokuthuthukisa izinhlelo zokungenisa umoya, ukuthuthukisa ukusetshenziswa kwemishini yokuzivikela yomuntu siqu (i-PPE), noma ukwenza ngcono ukusebenza kwenqubo—amazinga okuchayeka e-MOCA kumchamo kubasebenzi abathintekile avame ukubonisa ukwehla okusobala nokuphawulekayo, okubonisa ukusebenza kahle kwalezi zindlela zokuvimbela ekunciphiseni ukuchayeka emsebenzini ku-MOCA.
Isikhathi sokuthunyelwe: Okthoba-11-2025