{"id":106534,"date":"2026-06-29T10:37:14","date_gmt":"2026-06-29T10:37:14","guid":{"rendered":"https:\/\/stopcarcinogensatwork.eu\/fact\/fibras-de-carboneto-de-silicio\/"},"modified":"2026-06-29T10:37:14","modified_gmt":"2026-06-29T10:37:14","slug":"fibras-de-carboneto-de-silicio","status":"publish","type":"fact","link":"https:\/\/stopcarcinogensatwork.eu\/pt-pt\/fact\/fibras-de-carboneto-de-silicio\/","title":{"rendered":"Fibras de carboneto de sil\u00edcio"},"content":{"rendered":"

N\u00e3o h\u00e1 estimativas dispon\u00edveis sobre o n\u00famero atual de trabalhadores expostos a fibras de carboneto de sil\u00edcio na UE. No entanto, sabe-se que a exposi\u00e7\u00e3o ocorre principalmente em ind\u00fastrias ligadas \u00e0 produ\u00e7\u00e3o e transforma\u00e7\u00e3o de carboneto de sil\u00edcio e \u00e0 utiliza\u00e7\u00e3o de materiais que cont\u00eam carboneto de sil\u00edcio. <\/p>\n

Exposure at work occurs mainly through inhalation of airborne fibers generated during industrial processes such as furnace operation, trituration, grinding or machining. These fibers are very small and can remain suspended in the air, making them easy to inhale. <\/p>\n

As fibras de carboneto de sil\u00edcio est\u00e3o classificadas no Regulamento CRE como agentes cancer\u00edgenos da categoria 1B (podem causar cancro nos seres humanos por inala\u00e7\u00e3o). O potencial cancer\u00edgeno est\u00e1 principalmente relacionado com a forma, o tamanho e a persist\u00eancia das fibras nos pulm\u00f5es. <\/p>\n

A exposi\u00e7\u00e3o \u00e0s fibras de carboneto de sil\u00edcio pode ter graves consequ\u00eancias para a sa\u00fade. O principal tipo de cancro observado nos trabalhadores \u00e9 o cancro do pulm\u00e3o, e tamb\u00e9m h\u00e1 preocupa\u00e7\u00f5es quanto ao mesotelioma. <\/p>\n

Onde ocorrem os riscos<\/h2>\n

A exposi\u00e7\u00e3o profissional \u00e0s fibras de carboneto de sil\u00edcio ocorre principalmente em setores onde o carboneto de sil\u00edcio \u00e9 produzido ou utilizado, incluindo a produ\u00e7\u00e3o de minerais n\u00e3o met\u00e1licos, produtos refrat\u00e1rios, produtos cer\u00e2micos t\u00e9cnicos, transforma\u00e7\u00e3o de metais, fabrica\u00e7\u00e3o de m\u00e1quinas e de equipamentos de transporte.<\/p>\n

As profiss\u00f5es com maior risco de exposi\u00e7\u00e3o incluem operadores de fornos, trituradores, moinhos ou operadores de processo, trabalhadores da produ\u00e7\u00e3o, pessoal de manuten\u00e7\u00e3o, operadores de m\u00e1quinas, esmeriladores e polidores de metais, e trabalhadores que manuseiam materiais comp\u00f3sitos. Estes trabalhadores podem estar em risco de exposi\u00e7\u00e3o simult\u00e2nea a outros agentes cancer\u00edgenos, como a s\u00edlica cristalina<\/a>, os HAP<\/a>, os gases de escape de Diesel<\/a>, metais como o cr\u00f3mio<\/a> hexavalente ou o n\u00edquel<\/a>, o amianto<\/a> ou os fumos de soldadura<\/a>. Os trabalhadores podem ficar expostos durante v\u00e1rias fases da produ\u00e7\u00e3o e manuseamento. As tarefas com muita poeira tamb\u00e9m podem contaminar a roupa e levar a uma exposi\u00e7\u00e3o indireta. <\/p>\n

Exposure to silicon carbide fibers also occurs in vehicle production and in the construction sector (for example, abrasive blasting operators).<\/p>\n

Mais informa\u00e7\u00f5es sobre a subst\u00e2ncia<\/h2>\n

As fibras de carboneto de sil\u00edcio s\u00e3o fibras inorg\u00e2nicas s\u00f3lidas compostas por sil\u00edcio e carbono. S\u00e3o extremamente duras, quimicamente est\u00e1veis e insol\u00faveis em \u00e1gua, e podem dispersar-se no ar sob a forma de poeira e fibras durante o manuseamento e o processamento. <\/p>\n

Podem surgir acidentalmente durante o fabrico ou ser produzidos de forma intencional como \u00abwhiskers\u00bb para utiliza\u00e7\u00f5es espec\u00edficas.<\/p>\n

O tamanho e a forma das fibras s\u00e3o fundamentais para o risco para a sa\u00fade. As fibras de carboneto de sil\u00edcio t\u00eam normalmente um di\u00e2metro inferior a 3 micr\u00f3metros e um comprimento superior a 5 micr\u00f3metros. Devido ao seu tamanho reduzido, semelhante ao das fibras de amianto, podem chegar \u00e0s partes mais profundas do pulm\u00e3o quando inaladas, onde podem permanecer durante longos per\u00edodos e n\u00e3o s\u00e3o facilmente eliminadas do corpo. <\/p>\n

As fibras de carboneto de sil\u00edcio s\u00e3o utilizadas principalmente em materiais comp\u00f3sitos de alto desempenho, onde s\u00e3o necess\u00e1rias elevada resist\u00eancia, baixo peso e resist\u00eancia a temperaturas extremas, como em motores aeroespaciais, ve\u00edculos espaciais, aplica\u00e7\u00f5es de defesa, equipamento industrial para altas temperaturas e outros setores de engenharia avan\u00e7ada.<\/p>\n

Riscos para a sa\u00fade que podem surgir<\/h2>\n

A principal via de exposi\u00e7\u00e3o \u00e0s fibras de carboneto de sil\u00edcio \u00e9 a inala\u00e7\u00e3o.<\/p>\n

Short-term exposure can cause irritation and inflammation of the respiratory system.<\/p>\n

Long-term exposure can cause lung cancer and, possibly, mesothelioma. Other severe non-cancer effects include pneumoconiose and chronic pulmonary disease, which can reduce pulmonary function and cause respiratory difficulties. All these diseases have long latency periods, typically several decades between exposure and the onset of the disease. <\/p>\n

O que podes fazer<\/h2>\n

Sempre que poss\u00edvel, deve-se considerar a substitui\u00e7\u00e3o das fibras de carboneto de sil\u00edcio por alternativas ou processos mais seguros. Para algumas aplica\u00e7\u00f5es (por exemplo, componentes de prote\u00e7\u00e3o t\u00e9rmica, escudos t\u00e9rmicos ou condutas de g\u00e1s quente), foram propostas fibras de cer\u00e2mica de \u00f3xido ou fibras de carbono cont\u00ednuas como substitutos. <\/p>\n

Devido \u00e0s propriedades das fibras de carboneto de sil\u00edcio, o foco principal da gest\u00e3o de riscos deve ser o controlo da liberta\u00e7\u00e3o de fibras no ar e a preven\u00e7\u00e3o da inala\u00e7\u00e3o, em vez do controlo de vapores ou l\u00edquidos. A ventila\u00e7\u00e3o eficaz (extrac\u00e7\u00e3o geral ou local), a supress\u00e3o de poeiras e a conten\u00e7\u00e3o s\u00e3o, por isso, medidas essenciais nos locais de trabalho onde se manuseiam fibras de carboneto de sil\u00edcio. As medidas organizacionais devem incluir a forma\u00e7\u00e3o dos trabalhadores, a limita\u00e7\u00e3o do tempo de exposi\u00e7\u00e3o, a limpeza regular e a monitoriza\u00e7\u00e3o da exposi\u00e7\u00e3o. <\/p>\n

Os trabalhadores devem seguir boas pr\u00e1ticas de higiene e usar equipamento de prote\u00e7\u00e3o individual (como m\u00e1scaras respirat\u00f3rias) apenas como \u00faltimo recurso, quando for necess\u00e1rio e depois de terem sido implementadas as poss\u00edveis solu\u00e7\u00f5es de engenharia e organizacionais. Em alguns casos, no entanto, \u00e9 necess\u00e1ria a prote\u00e7\u00e3o respirat\u00f3ria dos trabalhadores contra a inala\u00e7\u00e3o de fibras de carboneto de sil\u00edcio, como em interven\u00e7\u00f5es em fornos ou processos, ou na maquinagem\/retifica\u00e7\u00e3o de materiais comp\u00f3sitos que geram poeira respir\u00e1vel contendo fibras. Os empregadores t\u00eam de garantir que a respira\u00e7\u00e3o n\u00e3o exija um esfor\u00e7o f\u00edsico adicional (por exemplo, usando m\u00e1scaras respirat\u00f3rias com purificador de ar motorizado). \u00c9 altamente recomendado ou obrigat\u00f3rio, de acordo com a legisla\u00e7\u00e3o ou pr\u00e1tica nacional, que se fa\u00e7a um teste de ajuste a cada pessoa para garantir uma prote\u00e7\u00e3o adequada. As m\u00e1scaras respirat\u00f3rias t\u00eam de ser limpas\/substitu\u00eddas regularmente. <\/p>\n

Refer\u00eancias: ECHA, IARC, RAC<\/em><\/p>\n","protected":false},"template":"","carcinogens":[8644],"class_list":["post-106534","fact","type-fact","status-publish","hentry","carcinogens-fibras-de-carboneto-de-silicio"],"yoast_head":"\nFibras de carboneto de sil\u00edcio - STOP carcinogens at work<\/title>\n<meta name=\"description\" content=\"Be aware of what you work with! We collected all the important information these causing substances in easy-to-understand factsheets.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/stopcarcinogensatwork.eu\/pt-pt\/fact\/fibras-de-carboneto-de-silicio\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fibras de carboneto de sil\u00edcio\" \/>\n<meta property=\"og:description\" content=\"Be aware of what you work with! 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