Trong kh\u00ed th\u1ea3i c\u1ee7a \u00f4 t\u00f4 c\u00f3 c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a ch\u00ec nh\u01b0 ch\u00ec tetrametyl (CH3)4Pb. \u0110\u00f3 l\u00e0 v\u00ec trong x\u0103ng \u0111\u00e3 pha ch\u1ea5t ph\u1ee5 gia ch\u1ed1ng n\u1ed5 ch\u00ec tetrametyl. Th\u00f4ng th\u01b0\u1eddng m\u1ed7i galon (b\u1eb1ng 3,79 l\u00edt) x\u0103ng ng\u01b0\u1eddi ta th\u00eam v\u00e0o 2 \u2013 4 g ch\u00ec tetrametyl. Khi \u00f4 t\u00f4 ch\u1ea1y, 25% – 75% ch\u1ea5t n\u00e0y ch\u00e1y v\u1edbi x\u0103ng s\u1ea3n sinh ra c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a ch\u00ec th\u1ea3i v\u00e0o kh\u00f4ng kh\u00ed. Ch\u00ec l\u00e0 kim lo\u1ea1i n\u1eb7ng, r\u1ea5t \u0111\u1ed9c, ankyl ch\u00ec c\u00f3 \u0111\u1ed9 \u0111\u1ed9c c\u00e0ng cao h\u01a1n. V\u00ed d\u1ee5 \u0111\u1ed9 \u0111\u1ed9c c\u1ee7a ankyl ch\u00ec cao g\u1ea5p 100 l\u1ea7n so v\u1edbi kim lo\u1ea1i ch\u00ec. Khi ch\u00ec v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a ch\u00ec x\u00e2m nh\u1eadp v\u00e0o kh\u00f4ng kh\u00ed \u1edf d\u1ea1ng nh\u1eefng h\u1ea1t li ti, khu\u1ebfch t\u00e1n \u0111i r\u1ea5t xa. Trong b\u0103ng tuy\u1ebft \u1edf B\u1eafc C\u1ef1c, h\u00e0m l\u01b0\u1ee3ng ch\u00ec hai n\u0103m tr\u1edf l\u1ea1i \u0111\u00e2y \u0111\u00e3 t\u0103ng l\u00ean 20 l\u1ea7n. S\u1ed1 ch\u00ec n\u00e0y \u0111\u1ec1u l\u00e0 t\u1eeb c\u00e1c l\u1ee5c \u0111\u1ecba tr\u00f4i n\u1ed5i bay \u0111\u1ebfn. C\u00f9ng v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i, kh\u00f4ng kh\u00ed \u00f4 nhi\u1ec5m ch\u00ec \u0111\u00e3 lan r\u1ed9ng kh\u1eafp th\u1ebf gi\u1edbi v\u00e0 ng\u00e0y c\u00e0ng tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng. Kh\u00f4ng kh\u00ed \u00f4 nhi\u1ec5m ch\u00ec, tr\u00ean 90% l\u00e0 do kh\u00ed th\u1ea3i \u00f4 t\u00f4 t\u1ea1o n\u00ean. Ch\u00ec v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a ch\u00fang trong kh\u00f4ng kh\u00ed sau khi l\u1eafng xu\u1ed1ng m\u1eb7t \u0111\u1ea5t c\u00f2n l\u00e0m cho ngu\u1ed3n n\u01b0\u1edbc v\u00e0 \u0111\u1ea5t \u0111ai b\u1ecb \u00f4 nhi\u1ec5m.<\/p>\n\n\n\n
Ch\u00ec v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a ch\u00ec r\u1ea5t c\u00f3 h\u1ea1i cho c\u01a1 th\u1ec3 ng\u01b0\u1eddi. Ch\u00fang c\u00f3 th\u1ec3 \u0111i theo \u0111\u01b0\u1eddng \u0103n u\u1ed1ng v\u00e0o \u0111\u01b0\u1eddng ti\u00eau h\u00f3a, ho\u1eb7c th\u00f4ng qua h\u00f4 h\u1ea5p \u0111i v\u00e0o ph\u1ed5i, ch\u1ea5t ch\u00ec tetramethyl c\u00f2n c\u00f3 th\u1ec3 th\u00f4ng qua da th\u1ea9m th\u1ea5u v\u00e0o c\u01a1 th\u1ec3. Ch\u00ec sau khi v\u00e0o c\u01a1 th\u1ec3, 90% – 95% s\u1ebd h\u00ecnh th\u00e0nh ch\u1ea5t ch\u00ec photphat Pb3(PO4)2 tr\u1ea7m t\u00edch v\u00e0o trong x\u01b0\u01a1ng, ch\u1ec9 m\u1ed9t \u00edt \u0111\u01b0\u1ee3c b\u00e0i ti\u1ebft ra kh\u1ecfi c\u01a1 th\u1ec3. Khi ch\u00ec t\u00edch t\u1ee5 trong c\u01a1 th\u1ec3 \u0111\u1ebfn m\u1ed9t n\u1ed3ng \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh s\u1ebd g\u00e2y n\u00ean ng\u1ed9 \u0111\u1ed9c ch\u00ec. N\u00f3i chung c\u01a1 th\u1ec3 sau khi nhi\u1ec5m \u0111\u1ed9c ch\u00ec m\u1eb7t s\u1ebd xanh nh\u1ee3t, v\u00e1ng \u0111\u1ea7u, u\u1ec3 o\u1ea3i, \u0111au kh\u1edbp, n\u1ebfu nhi\u1ec5m \u0111\u1ed9c ch\u00ec n\u1eb7ng h\u01a1n s\u1ebd c\u00f3 c\u00e1c ch\u1ee9ng b\u1ec7nh thi\u1ebfu m\u00e1u. \u0110\u00f3 l\u00e0 v\u00ec ch\u00ec h\u1ee3p th\u00e0nh v\u1edbi c\u00e1c h\u1ed3ng c\u1ea7u trong m\u00e1u g\u00e2y tr\u1edf ng\u1ea1i cho kh\u1ea3 n\u0103ng h\u1ea5p thu v\u00e0 \u0111\u00e0o th\u1ea3i c\u1ee7a c\u01a1 th\u1ec3.<\/p>\n\n\n\n
N\u0103m 1961 \u1edf Tokyo, Nh\u1eadt B\u1ea3n \u0111\u00e3 x\u1ea3y ra s\u1ef1 ki\u1ec7n nhi\u1ec5m \u0111\u1ed9c ch\u00ec m\u00e3n t\u00ednh tr\u00ean nh\u1eefng n\u00fat giao th\u00f4ng \u1edf ngo\u1ea1i \u00f4 T\u00f4ky\u00f4, n\u01a1i c\u00f3 xe c\u1ed9 qua l\u1ea1i t\u1ea5p n\u1eadp, m\u1ed7i ph\u00fat kho\u1ea3ng 50 \u00f4 t\u00f4, c\u00e1c kh\u00ed th\u1ea3i ch\u1ee9a ch\u00ec th\u1ea3i v\u00e0o kh\u00f4ng kh\u00ed khi\u1ebfn cho d\u00e2n c\u01b0 xung quanh xu\u1ea5t hi\u1ec7n nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng ch\u1ee9c n\u0103ng m\u00e1u gi\u1ea3m th\u1ea5p. C\u00f3 nh\u1eefng ng\u01b0\u1eddi d\u00e2n c\u00f2n b\u1ecb c\u00e1c b\u1ec7nh v\u1ec1 tim m\u1ea1ch, n\u00e3o \u1ee9 m\u00e1u v\u00e0 vi\u00eam th\u1eadn m\u00e3n t\u00ednh. C\u1ea3nh s\u00e1t giao th\u00f4ng bu\u1ed9c ph\u1ea3i \u0111\u1ed9i m\u0169 ph\u00f2ng \u0111\u1ed9c khi l\u00e0m nhi\u1ec7m v\u1ee5. Tr\u00ean th\u1ef1c t\u1ebf kh\u00ed th\u1ea3i \u00f4 t\u00f4 ch\u1ee9a ch\u00ec \u0111\u00e3 t\u1ea1o n\u00ean s\u1ef1 \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng r\u1ea5t nghi\u00eam tr\u1ecdng.<\/p>\n\n\n\n
Mu\u1ed1n ng\u0103n ng\u1eeba v\u00e0 gi\u1ea3m th\u1ea5p \u00f4 nhi\u1ec5m ch\u00ec do \u00f4 t\u00f4 g\u00e2y n\u00ean th\u00ec bi\u1ec7n ph\u00e1p t\u1ed1t nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng x\u0103ng kh\u00f4ng c\u00f3 ch\u00ec. \u1ede B\u1eafc Kinh, Th\u01b0\u1ee3ng H\u1ea3i v\u00e0 m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ed1 l\u1edbn c\u1ee7a Trung Qu\u1ed1c, ng\u00e0y 01 th\u00e1ng 6 n\u0103m 1988 v\u00e0 ng\u00e0y 01 th\u00e1ng 10 n\u0103m 1988 \u0111\u00e3 l\u1ea7n l\u01b0\u1ee3t d\u00f9ng x\u0103ng kh\u00f4ng ch\u00ec1. C\u00e1c nh\u00e0 khoa h\u1ecdc d\u1ef1 \u0111o\u00e1n sau khi t\u1ea5t c\u1ea3 \u00f4 t\u00f4 d\u00f9ng x\u0103ng kh\u00f4ng ch\u00ec th\u00ec t\u1ed1c \u0111\u1ed9 \u00f4 nhi\u1ec5m ch\u00ec trong kh\u00f4ng kh\u00ed s\u1ebd gi\u1ea3m t\u1eeb 80% – 90%. L\u00fac \u0111\u00f3 kh\u00f4ng kh\u00ed th\u00e0nh ph\u1ed1 s\u1ebd trong s\u1ea1ch tr\u1edf l\u1ea1i.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Ch\u00ec; Ch\u00ec tetrametyl; X\u0103ng kh\u00f4ng ch\u00ec.<\/p>\n","protected":false},"excerpt":{"rendered":"
Trong kh\u00ed th\u1ea3i c\u1ee7a \u00f4 t\u00f4 c\u00f3 c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a ch\u00ec nh\u01b0 ch\u00ec tetrametyl (CH3)4Pb. \u0110\u00f3 l\u00e0 v\u00ec trong x\u0103ng \u0111\u00e3 pha ch\u1ea5t ph\u1ee5 gia ch\u1ed1ng n\u1ed5 ch\u00ec tetrametyl. Th\u00f4ng th\u01b0\u1eddng m\u1ed7i galon (b\u1eb1ng 3,79 l\u00edt) x\u0103ng ng\u01b0\u1eddi ta th\u00eam v\u00e0o 2 \u2013 4 g ch\u00ec tetrametyl. Khi \u00f4 t\u00f4 ch\u1ea1y, 25% – 75% […]<\/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-9350","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\/9350","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=9350"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9350\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}