Cu\u1ed1i thu m\u1eb7t \u0111\u1ea5t r\u1ee5ng \u0111\u1ea7y l\u00e1 kh\u00f4. \u0110\u1ec3 x\u1eed l\u00ed ch\u00fang, ng\u01b0\u1eddi ta th\u01b0\u1eddng qu\u00e9t th\u00e0nh \u0111\u1ed1ng, r\u1ed3i ch\u00e2m l\u1eeda \u0111\u1ed1t. L\u00fac d\u1ecdn nh\u00e0, ng\u01b0\u1eddi ta th\u01b0\u1eddng \u0111\u1ed1t h\u1ee7y c\u00e1c gi\u1ea5y t\u1edd linh tinh, c\u00e1c d\u00e2y \u0111i\u1ec7n b\u1ecdc v\u1ecf cao su, v.v.. Do \u0111\u00f3 kh\u00f3i m\u00f9 lan kh\u1eafp n\u01a1i, k\u00edch th\u00edch m\u1eaft m\u0169i cao su g\u00e2y \u00f4 nhi\u1ec5m m\u00f4I tr\u01b0\u1eddng xung quanh.<\/p>\n\n\n\n
Khi \u0111\u1ed1t l\u00e1 kh\u00f4, ch\u00fang kh\u00f4ng ho\u00e0n to\u00e0n ch\u00e1y h\u1ebft, ch\u00fang v\u1eeba ch\u00e1y v\u1eeba th\u1ea3i ra nhi\u1ec1u ch\u1ea5t c\u00f3 h\u1ea1i v\u00e0o kh\u00f4ng kh\u00ed, trong \u0111\u00f3 ch\u1ee9a c\u00e1c kh\u00ed, ch\u1ea5t l\u1ecfng v\u00e0 ch\u1ea5t r\u1eafn. Trong kh\u00ed c\u00f3 c\u00e1c ch\u1ea5t nh\u01b0 CO, CO2, h\u01a1i n\u01b0\u1edbc, c\u00e1c h\u1ee3p ch\u1ea5t nit\u01a1ric, sunfit, cacbonhi\u0111ro, metan, metanol, acrylaldehyt, v.v.. Khi \u0111\u1ed1t l\u00e1 kh\u00f4, trong kh\u00f3i c\u00f3 m\u00f9i cay, khi\u1ebfn cho ta ch\u1ea3y n\u01b0\u1edbc m\u1eaft, \u0111\u00f3 l\u00e0 do t\u00e1c d\u1ee5ng c\u1ee7a acrylaldehit. Trong c\u00e1c ch\u1ea5t th\u1ec3 l\u1ecfng ch\u1ee7 y\u1ebfu c\u00f3 h\u01a1i n\u01b0\u1edbc, m\u00f9 axit v.v.. N\u1ebfu trong nh\u1eefng \u0111\u00e1m r\u00e1c \u0111\u1ed1t c\u00f3 c\u00e1c ch\u1ea5t nh\u1ef1a ch\u1ee9a clo th\u00ec s\u1ebd sinh ra kh\u00ed \u0111\u1ed9c c\u00e0ng m\u1ea1nh h\u01a1n. G\u1eb7p h\u01a1i n\u01b0\u1edbc, n\u00f3 s\u1ebd ph\u00e1t sinh lo\u1ea1i kh\u00f3i m\u00f9 c\u00f3 t\u00ednh axit m\u1ea1nh, c\u00f3 th\u1ec3 \u0103n m\u00f2n da v\u00e0 ni\u00eam m\u1ea1c. C\u00e1c h\u1ea1t r\u1eafn ch\u1ee7 y\u1ebfu l\u00e0 b\u1ee5i than, b\u1ee5i v\u00e0 kh\u00f3i \u0111en. C\u00e1c h\u1ea1t than \u0111en c\u00f3 t\u00ednh h\u1ea5p th\u1ee5 r\u1ea5t m\u1ea1nh, c\u00f3 th\u1ec3 h\u1ea5p ph\u1ee5 nhi\u1ec1u ch\u1ea5t kh\u00ed \u0111\u1ed9c. Kh\u00f3i \u0111en l\u00e0 h\u00f3a h\u1ee3p do than, hi\u0111ro, oxi, l\u01b0u hu\u1ef3nh h\u1ee3p th\u00e0nh. Trong \u0111\u00f3 r\u1ea5t nhi\u1ec1u cacbonhi\u0111ro th\u01a1m.<\/p>\n\n\n\n
\u1ede nhi\u1ec7t \u0111\u1ed9 600oC \u2013 900oC, khi thi\u1ebfu oxi th\u00ec c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 r\u1ea5t d\u1ec5 sinh th\u00e0nh h\u00e0ng lo\u1ea1t ch\u1ea5t cacbonhi\u0111ro th\u01a1m. Ch\u1ea5t n\u00e0y c\u00f3 t\u00e1c d\u1ee5ng g\u00e2y ung th\u01b0, nh\u01b0 benzen v\u00e0 pyren \u2013 3,4 ch\u00ednh l\u00e0 ch\u1ea5t g\u00e2y kh\u1ed1i u r\u1ea5t m\u1ea1nh. \u0110\u1ed1t l\u1ed9 thi\u00ean m\u1ed9t t\u1ea5n l\u00e1 kh\u00f4 ho\u1eb7c m\u1ed9t t\u1ea5n r\u00e1c th\u1ea3i th\u00e0nh ph\u1ed1 c\u00f3 th\u1ec3 s\u1ea3n sinh ra 310 mg benzen, pyren \u2013 3,4. Nh\u1eefng ch\u1ea5t n\u00e0y th\u01b0\u1eddng l\u1eabn trong c\u00e1c vi h\u1ea1t c\u1ee7a kh\u00f3i, theo gi\u00f3 bay \u0111i kh\u1eafp n\u01a1i, th\u00e2m nh\u1eadp v\u00e0o ph\u1ed5i khi\u1ebfn cho b\u1ec7nh u ph\u1ed5i t\u0103ng l\u00ean r\u00f5 r\u1ec7t.<\/p>\n\n\n\n
N\u1ebfu nh\u1eefng ch\u1ea5t g\u00e2y u n\u00e0y c\u00f9ng v\u1edbi n\u01b0\u1edbc m\u01b0a r\u01a1i xu\u1ed1ng m\u1eb7t \u0111\u1ea5t s\u1ebd g\u00e2y n\u00ean \u00f4 nhi\u1ec5m ngu\u1ed3n n\u01b0\u1edbc v\u00e0 \u0111\u1ea5t.<\/p>\n\n\n\n
Ngo\u00e0i ra trong \u0111\u1ed1ng r\u00e1c th\u01b0\u1eddng c\u00f2n c\u00f3 ch\u1ea5t s\u01a1n, thu\u1ed1c nhu\u1ed9m ho\u1eb7c nh\u1eefng t\u1edd gi\u1ea5y in m\u1ef1c m\u00e0u, khi \u0111\u1ed1t ch\u00fang s\u1ebd s\u1ea3n sinh ra c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a kim lo\u1ea1i n\u1eb7ng c\u00f3 \u0111\u1ed9c, ch\u1ee9a cadimi, crom, ch\u00ec, asen, v.v.. v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a asen. Ch\u00fang c\u0169ng s\u1ebd l\u1eabn v\u00e0o c\u00e1c vi h\u1ea1t c\u1ee7a b\u1ee5i kh\u00f3i g\u00e2y \u00f4 nhi\u1ec5m kh\u00f4ng kh\u00ed.<\/p>\n\n\n\n
V\u00ec v\u1eady kh\u00f4ng th\u1ec3 \u0111\u1ed1t l\u00e1 kh\u00f4 ho\u1eb7c c\u00e1c lo\u1ea1i r\u00e1c kh\u00e1c m\u1ed9t c\u00e1ch t\u00f9y ti\u1ec7n. N\u00ean t\u1eadp trung ch\u00fang l\u1ea1i \u0111\u1ec3 cho ng\u00e0nh b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng x\u1eed l\u00ed.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: R\u00e1c; \u0110\u1ed1t r\u00e1c.<\/p>\n","protected":false},"excerpt":{"rendered":"
Cu\u1ed1i thu m\u1eb7t \u0111\u1ea5t r\u1ee5ng \u0111\u1ea7y l\u00e1 kh\u00f4. \u0110\u1ec3 x\u1eed l\u00ed ch\u00fang, ng\u01b0\u1eddi ta th\u01b0\u1eddng qu\u00e9t th\u00e0nh \u0111\u1ed1ng, r\u1ed3i ch\u00e2m l\u1eeda \u0111\u1ed1t. L\u00fac d\u1ecdn nh\u00e0, ng\u01b0\u1eddi ta th\u01b0\u1eddng \u0111\u1ed1t h\u1ee7y c\u00e1c gi\u1ea5y t\u1edd linh tinh, c\u00e1c d\u00e2y \u0111i\u1ec7n b\u1ecdc v\u1ecf cao su, v.v.. Do \u0111\u00f3 kh\u00f3i m\u00f9 lan kh\u1eafp n\u01a1i, k\u00edch th\u00edch m\u1eaft m\u0169i cao […]<\/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-9354","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\/9354","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=9354"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9354\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}