M\u00e1y photocopy l\u00e0 c\u00f4ng c\u1ee5 v\u0103n ph\u00f2ng hi\u1ec7n \u0111\u1ea1i, th\u1eddi gian g\u1ea7n \u0111\u00e2y ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i. Song \u0111\u1ed3ng th\u1eddi v\u1edbi vi\u1ec7c \u0111em l\u1ea1i hi\u1ec7u su\u1ea5t cao cho c\u00f4ng nghi\u1ec7p th\u00ec n\u00f3 c\u0169ng mang \u0111\u1ebfn nh\u1eefng nguy h\u1ea1i nh\u1ea5t \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi s\u1ee9c kh\u1ecfe con ng\u01b0\u1eddi, khi\u1ebfn cho ng\u01b0\u1eddi s\u1eed d\u1ee5ng m\u00e1y b\u1ecb c\u00e1c ch\u1ee9ng b\u1ec7nh t\u1ed5ng h\u1ee3p.<\/p>\n\n\n\n
M\u00e1y photocopy s\u1eed d\u1ee5ng b\u1ed9t hi\u1ec7n h\u00ecnh c\u00f3 hai lo\u1ea1i kh\u00f4 v\u00e0 \u01b0\u1edbt. Lo\u1ea1i b\u1ed9t hi\u1ec7n h\u00ecnh kh\u00f4 l\u00e0 d\u00f9ng m\u1ed9t lo\u1ea1i than \u0111en cao c\u1ea5p ch\u1ebf ra, trong \u0111\u00f3 c\u00f3 ch\u1ea5t cacbua th\u01a1m v\u00f2ng c\u00f3 t\u00e1c d\u1ee5ng g\u00e2y ung th\u01b0. B\u1ed9t hi\u1ec7n h\u00ecnh trong qu\u00e1 tr\u00ecnh photocopy r\u1ea5t \u00edt b\u1ecb ph\u00e2n h\u1ee7y, t\u00ednh ch\u1ea5t kh\u00e1 \u1ed5n \u0111\u1ecbnh. Ngo\u00e0i ra trong b\u1ed9t hi\u1ec7n h\u00ecnh c\u00f2n ch\u1ee9a m\u1ed9t vi l\u01b0\u1ee3ng nh\u00f3m nitropyren g\u00e2y ung th\u01b0, v\u00ec h\u00e0m l\u01b0\u1ee3ng r\u1ea5t th\u1ea5p n\u00ean n\u00f3i chung kh\u00f4ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec1u \u0111\u1ebfn ng\u01b0\u1eddi s\u1eed d\u1ee5ng, nh\u01b0ng n\u1ebfu ph\u00f2ng photocopy kh\u00f4ng th\u00f4ng gi\u00f3 t\u1ed1t, ti\u1ebfp x\u00fac l\u00e2u d\u00e0i v\u1edbi lo\u1ea1i b\u1ed9t \u0111\u00f3 th\u00ec r\u1ea5t nguy hi\u1ec3m.<\/p>\n\n\n\n
Trong qu\u00e1 tr\u00ecnh m\u00e1y photocopy v\u1eadn h\u00e0nh, \u00e1nh s\u00e1ng c\u1ee7a \u0111\u00e8n cao \u00e1p, ho\u1eb7c \u0111\u00e8n h\u1ed3 quang ch\u1ee9a m\u1ed9t l\u01b0\u1ee3ng l\u1edbn tia t\u1eed ngo\u1ea1i. Tia t\u1eed ngo\u1ea1i c\u00f3 th\u1ec3 k\u00edch th\u00edch oxi trong kh\u00f4ng kh\u00ed chuy\u1ec3n th\u00e0nh kh\u00ed \u00f4z\u00f4n. Theo x\u00e1c \u0111\u1ecbnh, ch\u1ed7 m\u00e1y photocopy l\u00e0m vi\u1ec7c, h\u00e0m l\u01b0\u1ee3ng kh\u00ed \u00f4z\u00f4n th\u01b0\u1eddng \u0111\u1ea1t \u0111\u1ebfn 0,11 \u2013 1,76 mg\/m3 . Kh\u00ed \u00f4z\u00f4n c\u00f3 th\u1ec3 h\u1ee3p v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n nit\u01a1 v\u00e0 oxi trong kh\u00f4ng kh\u00ed \u0111\u1ec3 h\u00ecnh th\u00e0nh h\u1ee3p ch\u1ea5t oxi nit\u01a1. Ch\u1ea5t n\u00e0y c\u00f3 t\u00ednh k\u00edch th\u00edch r\u1ea5t m\u1ea1nh \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng h\u00f4 h\u1ea5p. Kh\u00ed \u00f4z\u00f4n t\u1ec9 tr\u1ecdng l\u1edbn n\u00ean chuy\u1ec3n \u0111\u1ed9ng ch\u1eadm. N\u1ebfu ph\u00f2ng l\u00e0m vi\u1ec7c kh\u00f4ng th\u00f4ng gi\u00f3 t\u1ed1t th\u00ec ng\u01b0\u1eddi \u0111\u1ee9ng m\u00e1y d\u1ec5 b\u1ecb c\u00e1c ch\u1ee9ng b\u1ec7nh t\u1ed5ng h\u1ee3p. C\u00e1c tri\u1ec7u ch\u1ee9ng ch\u1ee7 y\u1ebfu l\u00e0: c\u1ed5 h\u1ecdng kh\u00f4 r\u00e1t, ng\u1ef1c n\u00f4n nao, ho, \u0111au \u0111\u1ea7u, th\u1ecb l\u1ef1c gi\u1ea3m s\u00fat v.v.. N\u1ebfu th\u1edf ph\u1ea3i kh\u00ed \u00f4z\u00f4n n\u1ed3ng \u0111\u1ed9 cao trong th\u1eddi gian d\u00e0i c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn ng\u1ed9 \u0111\u1ed9c, ph\u1ed5i s\u01b0ng to.<\/p>\n\n\n\n
Khi lau ch\u00f9i m\u00e1y photocopy, ta th\u01b0\u1eddng d\u00f9ng ch\u1ed5i \u0111\u1ec3 qu\u00e9t m\u1ef1c, sau \u0111\u00f3 d\u00f9ng c\u1ed3n ho\u1eb7c benzen lau r\u1eeda. Khi lau r\u1eeda, n\u1ed3ng \u0111\u1ed9 c\u1ee7a b\u1ee5i trong ph\u00f2ng v\u00e0 benzen t\u0103ng l\u00ean r\u00f5 r\u1ec7t. C\u00f3 ng\u01b0\u1eddi \u0111\u00e3 t\u1eebng \u0111\u1eb7t nhi\u1ec1u m\u00e1y photocopy trong ph\u00f2ng l\u00e0m vi\u1ec7c v\u00e0 ti\u1ebfn h\u00e0nh ki\u1ec3m tra ph\u00e1t hi\u1ec7n khi r\u1eeda m\u00e1y n\u1ed3ng \u0111\u1ed9 b\u1ee5i trong ph\u00f2ng t\u0103ng \u0111\u1ebfn 43 mg\/m3, n\u1ed3ng \u0111\u1ed9 benzen \u0111\u1ea1t 1852,2 mg\/m3, v\u01b0\u1ee3t qu\u00e1 ti\u00eau chu\u1ea9n v\u1ec7 sinh do Nh\u00e0 n\u01b0\u1edbc qui \u0111\u1ecbnh 3 l\u1ea7n v\u00e0 45 l\u1ea7n. \u0110\u1ec3 gi\u1ea3m th\u1ea5p s\u1ef1 nguy h\u1ea1i c\u1ee7a m\u00e1y photocopy \u0111\u1ed1i v\u1edbi s\u1ee9c kh\u1ecfe, trong qu\u00e1 tr\u00ecnh photo n\u00ean t\u0103ng c\u01b0\u1eddng d\u00f9ng b\u1ea3o h\u1ed9 lao \u0111\u1ed9ng v\u00e0 c\u00f3 nh\u1eefng bi\u1ec7n ph\u00e1p d\u1ef1 ph\u00f2ng c\u1ea7n thi\u1ebft. T\u1ed1t nh\u1ea5t l\u00e0 trong ph\u00f2ng c\u00f3 l\u1eafp qu\u1ea1t th\u00f4ng gi\u00f3 v\u00e0 m\u00e1y h\u00fat b\u1ee5i \u0111\u1ec3 gi\u1ea3m th\u1ea5p n\u1ed3ng \u0111\u1ed9 b\u1ee5i, khi\u1ebfn cho kh\u00ed \u00f4z\u00f4n v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t oxit nit\u01a1 trong ph\u00f2ng \u0111\u01b0\u1ee3c k\u1ecbp th\u1eddi th\u1ea3i ra b\u00ean ngo\u00e0i. Trong ph\u00f2ng n\u00ean tr\u00e1nh \u00e1nh s\u00e1ng M\u1eb7t Tr\u1eddi chi\u1ebfu qua m\u00e1y \u0111\u1ec3 gi\u1ea3m b\u1edbt s\u1ef1 h\u00ecnh th\u00e0nh c\u00e1c h\u1ee3p ch\u1ea5t oxit nit\u01a1. Khi lau m\u00e1y t\u1ed1t nh\u1ea5t l\u00e0 d\u00f9ng c\u1ed3n thay th\u1ebf benzen \u0111\u1ec3 tr\u00e1nh t\u1ea1o n\u00ean \u00f4 nhi\u1ec5m benzen. Ng\u01b0\u1eddi \u0111\u1ee9ng m\u00e1y n\u00ean m\u1eb7c qu\u1ea7n \u00e1o l\u00e0m vi\u1ec7c, t\u1ed1t nh\u1ea5t l\u00e0 \u0111eo kh\u1ea9u trang v\u00e0 k\u00ednh r\u00e2m \u0111\u1ec3 tr\u00e1nh b\u1ecb \u00e1nh s\u00e1ng m\u1ea1nh k\u00edch th\u00edch. N\u00ean u\u1ed1ng b\u1ed5 sung vitamin A \u0111\u1ec3 cho m\u00e0ng sinh v\u1eadt c\u1ee7a t\u1ebf b\u00e0o tr\u00e1nh \u0111\u01b0\u1ee3c nh\u1eefng t\u1ed5n th\u01b0\u01a1ng do c\u00e1c h\u1ee3p ch\u1ea5t oxit nit\u01a1 g\u00e2y n\u00ean. \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi c\u00f3 b\u1ec7nh v\u1ec1 \u0111\u01b0\u1eddng h\u00f4 h\u1ea5p, m\u1ea5t ng\u1ee7 v\u00e0 v\u00e1ng \u0111\u1ea7u c\u0169ng nh\u01b0 ph\u1ee5 n\u1eef c\u00f3 thai, t\u1ed1t nh\u1ea5t kh\u00f4ng s\u1eed d\u1ee5ng m\u00e1y photocopy.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: C\u00e1c ch\u1ee9ng t\u1ed5ng h\u1ee3p v\u1ec1 m\u00e1y photocopy.<\/p>\n","protected":false},"excerpt":{"rendered":"
M\u00e1y photocopy l\u00e0 c\u00f4ng c\u1ee5 v\u0103n ph\u00f2ng hi\u1ec7n \u0111\u1ea1i, th\u1eddi gian g\u1ea7n \u0111\u00e2y ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i. Song \u0111\u1ed3ng th\u1eddi v\u1edbi vi\u1ec7c \u0111em l\u1ea1i hi\u1ec7u su\u1ea5t cao cho c\u00f4ng nghi\u1ec7p th\u00ec n\u00f3 c\u0169ng mang \u0111\u1ebfn nh\u1eefng nguy h\u1ea1i nh\u1ea5t \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi s\u1ee9c kh\u1ecfe con ng\u01b0\u1eddi, khi\u1ebfn cho ng\u01b0\u1eddi s\u1eed d\u1ee5ng m\u00e1y […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,17],"tags":[],"class_list":["post-9540","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-moi-truong"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9540","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9540"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9540\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}