{"id":8949,"date":"2007-05-29T07:36:05","date_gmt":"2007-05-29T00:36:05","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2007\/05\/nghien-cuu-xu-ly-be-mat-tay-mau-go-keo-tai-tuong-lam-nguyen-lieu-de-san-xuat-do-moc\/"},"modified":"2013-10-06T09:00:55","modified_gmt":"2013-10-06T02:00:55","slug":"nghien-cuu-xu-ly-be-mat-tay-mau-go-keo-tai-tuong-lam-nguyen-lieu-de-san-xuat-do-moc","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-xu-ly-be-mat-tay-mau-go-keo-tai-tuong-lam-nguyen-lieu-de-san-xuat-do-moc\/","title":{"rendered":"Nghi\u00ean c\u1ee9u x\u1eed l\u00fd b\u1ec1 m\u1eb7t (t\u1ea9y m\u1ea7u) g\u1ed7 keo tai t\u01b0\u1ee3ng l\u00e0m nguy\u00ean li\u1ec7u \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c"},"content":{"rendered":"<\/p>\n

B\u00f9i Duy Ng\u1ecdc, Nguy\u1ec5n \u0110\u00ecnh H\u1ee3i, V\u0169 \u0110\u00ecnh Th\u1ecbnh<\/strong> <\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em> <\/p>\n

T\u00f3m t\u1eaft<\/strong> <\/p>\n

Hi\u1ec7n nay c\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p c\u0169ng nh\u01b0 c\u00f3 nhi\u1ec1u lo\u1ea1i h\u00f3a ch\u1ea5t c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 x\u1eed l\u00fd b\u1ec1 m\u1eb7t (t\u1ea9y m\u1ea7u) g\u1ed7. B\u00e0i b\u00e1o n\u00e0y n\u00eau k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9ut\u1ea9y m\u1ea7u b\u1ec1 m\u1eb7t g\u1ed7 Keo tai t\u01b0\u1ee3ng, d\u00f9ng h\u00f3a ch\u1ea5t t\u1ea9y m\u1ea7u l\u00e0 H2<\/sub>O2<\/sub> n\u1ed3ng \u0111\u1ed9 l\u00e0 7,5%, th\u1eddi gian nh\u00fang m\u1eabu v\u00e0o dung d\u1ecbch t\u1ea9y l\u00e0 2 ph\u00fat sau \u0111\u00f3 s\u1ea5y v\u1edbi nhi\u1ec7t \u0111\u1ed9 s\u1ea5y l\u00e0 600<\/sup>C, th\u1eddi gian s\u1ea5y l\u00e0 60 ph\u00fat cho k\u1ebft qu\u1ea3 t\u1ea9y tr\u1eafng t\u1ed1t. <\/p>\n

T\u1eeb kho\u00e1:<\/strong> T\u1ea9y tr\u1eafng, g\u1ed7 Keo tai t\u01b0\u1ee3ng<\/strong> <\/p>\n

M\u1edf \u0111\u1ea7u<\/strong> <\/p>\n

G\u1ed7 Keo tai t\u01b0\u1ee3ng hi\u1ec7n nay \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ee7 y\u1ebfu l\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t gi\u1ea5y, b\u0103m d\u0103m xu\u1ea5t kh\u1ea9u. Ngo\u00e0i ra, g\u1ed7 Keo tai t\u01b0\u1ee3ng \u0111\u00e3 \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 nh\u00e0 khoa h\u1ecdc nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u trong l\u0129nh v\u1ef1c s\u1ea3n xu\u1ea5t v\u00e1n d\u0103m, v\u00e1n b\u00f3c, v\u00e1n gh\u00e9p thanh v.v . Trong l\u0129nh v\u1ef1c s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c, b\u1ec1 m\u1eb7t g\u1ed7 x\u1ebb c\u1ee7a g\u1ed7 Keo tai t\u01b0\u1ee3ng c\u00f3m\u1ea7u s\u1eafc x\u1ea5u (t\u1ed1i m\u1ea7u, m\u1ea7u s\u1eafc kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u,…) n\u00ean r\u1ea5t kh\u00f3 trang tr\u00ed b\u1ec1 m\u1eb7t b\u1eb1ng c\u00e1c ch\u1ea5t ph\u1ee7 m\u00e0u trong su\u1ed1t, v\u00ec th\u1ebf l\u00e0m h\u1ea1n ch\u1ebf s\u1eed d\u1ee5ng g\u1ed7 v\u00e0 l\u00e0m gi\u1ea3m gi\u00e1 tr\u1ecb c\u1ee7a s\u1ea3n ph\u1ea9m. V\u1edbi mong mu\u1ed1n kh\u1eafc ph\u1ee5c m\u1ea7u s\u1eafc c\u1ee7a g\u1ed7, g\u00f3p ph\u1ea7n s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 g\u1ed7 Keo tai t\u01b0\u1ee3ng l\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c, ch\u00fang t\u00f4i \u0111\u00e3 th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i: “Nghi\u00ean c\u1ee9u x\u1eed l\u00fd b\u1ec1 m\u1eb7t (t\u1ea9y m\u1ea7u) g\u1ed7 keo tai t\u01b0\u1ee3ng l\u00e0m nguy\u00ean li\u1ec7u \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c” <\/p>\n

Qu\u00e1 tr\u00ecnh th\u1ef1c nghi\u1ec7m<\/strong>Chu\u1ea9n b\u1ecb nguy\u00ean li\u1ec7u<\/strong>* <\/p>\n

Nguy\u00ean li\u1ec7u g\u1ed7 Keo tai t\u01b0\u1ee3ng c\u00f3 c\u1ea5p tu\u1ed5i l\u00e0 7\u20138 tu\u1ed5i \u0111\u01b0\u1ee3c l\u1ea5y t\u1ea1i: H\u1ed1 Nai – \u0110\u1ed3ng Nai. G\u1ed7 th\u00ed nghi\u1ec7m c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m \u0111\u01b0\u1ee3c ghi trong b\u1ea3ng 1. <\/p>\n

B\u1ea3ng 1. \u0110\u1eb7c \u0111i\u1ec3m g\u1ed7 Keo tai t\u01b0\u1ee3ng l\u00e0m th\u00ed nghi\u1ec7m<\/em><\/strong> <\/p>\n\n\n\n\n\n\n\n\n\n\n
TT<\/strong><\/td>\nN\u1ed9i dung<\/strong><\/td>\n\u0110\u01a1n v\u1ecb<\/strong><\/td>\nCh\u1ec9 s\u1ed1<\/strong><\/td>\n<\/tr>\n
1<\/td>\nT\u1ef7 l\u1ec7 v\u1ecf<\/td>\n%<\/td>\n5,00<\/td>\n<\/tr>\n
2<\/td>\nT\u1ef7 l\u1ec7gi\u00e1c<\/td>\n%<\/td>\n17,13<\/td>\n<\/tr>\n
3<\/td>\nT\u1ef7 l\u1ec7 l\u00f5i<\/td>\n%<\/td>\n77,87<\/td>\n<\/tr>\n
4<\/td>\n\u0110\u1ed9 \u1ea9m gi\u00e1c<\/td>\n%<\/td>\n82,83<\/td>\n<\/tr>\n
5<\/td>\n\u0110\u1ed9 \u1ea9m l\u00f5i<\/td>\n%<\/td>\n81,88<\/td>\n<\/tr>\n
6<\/td>\nKh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch gi\u00e1c<\/td>\ng\/cm3<\/sup><\/td>\n0,54<\/td>\n<\/tr>\n
7<\/td>\nKh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch l\u00f5i<\/td>\ng\/cm3<\/sup><\/td>\n0,52<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a g\u1ed7 th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c ghi trong b\u1ea3ng 2. <\/p>\n

B\u1ea3ng 2. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a g\u1ed7 Keo tai t\u01b0\u1ee3ng l\u00e0m th\u00ed nghi\u1ec7m<\/em><\/strong> <\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\n<\/strong>TT<\/strong>\n<\/td>\nTh\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/strong><\/td>\n\u0110\u01a1n v\u1ecb<\/strong><\/td>\nCh\u1ec9 s\u1ed1<\/strong><\/td>\n<\/tr>\n
1<\/td>\nXenluloza<\/td>\n%<\/td>\n50,00<\/td>\n<\/tr>\n
2<\/td>\nLicnin<\/td>\n%<\/td>\n24,70<\/td>\n<\/tr>\n
3<\/td>\nPentozan<\/td>\n%<\/td>\n22,10<\/td>\n<\/tr>\n
4<\/td>\nTro<\/td>\n%<\/td>\n0,42<\/td>\n<\/tr>\n
5<\/td>\nC\u00e1c ch\u1ea5t tan trong n\u01b0\u1edbc n\u00f3ng<\/td>\n%<\/td>\n3,30<\/td>\n<\/tr>\n
6<\/td>\nC\u00e1c ch\u1ea5t tan trong n\u01b0\u1edbc l\u1ea1nh<\/td>\n%<\/td>\n1,90<\/td>\n<\/tr>\n
7<\/td>\nC\u00e1c ch\u1ea5t tan trong dung m\u00f4i h\u1eefu c\u01a1<\/td>\n%<\/td>\n4,20<\/td>\n<\/tr>\n
8<\/td>\nC\u00e1c ch\u1ea5t tan trong NaOH<\/td>\n%<\/td>\n14,3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

* H\u00f3a ch\u1ea5t: Hydrogen peoxide (H2<\/sub>O2<\/sub>), n\u1ed3ng \u0111\u1ed9 nguy\u00ean th\u1ee7y 30% v\u00e0 Sodium hydroxide (NaOH). <\/p>\n

* D\u1ee5ng c\u1ee5 th\u00ed nghi\u1ec7m bao g\u1ed3m: m\u00e1y \u0111o \u0111\u1ed9 pH nh\u00e3n hi\u1ec7u ITEM-6, nhi\u1ec7t k\u1ebf, c\u1ed1c thu\u1ef7 tinh, b\u00ecnh nh\u1ef1a .v.v. <\/p>\n

Th\u1ef1c nghi\u1ec7m t\u1ea9y m\u1ea7u<\/strong> <\/p>\n

Ti\u1ebfn h\u00e0nh x\u1ebb g\u1ed7 tr\u00f2n g\u1ed7 Keo tai t\u01b0\u1ee3ng \u0111\u1ec3 t\u1ea1o m\u1eabu th\u00ed nghi\u1ec7m. M\u1eabu th\u00ed nghi\u1ec7m c\u00f3 k\u00edch th\u01b0\u1edbc: d\u00e0yxr\u1ed9ngxd\u00e0i=30x50x150(mm). C\u00e1c m\u1eabu tr\u01b0\u1edbc khi th\u00ed nghi\u1ec7m t\u1ea9y m\u1ea7u \u0111\u01b0\u1ee3c s\u1ea5y \u0111\u1ebfn \u0111\u1ed9 \u1ea9m W\u00a310%. Th\u00ed nghi\u1ec7m ti\u1ebfn h\u00e0nh \u1edf 3 ch\u1ebf \u0111\u1ed9: ch\u1ebf \u0111\u1ed9 I, ch\u1ebf \u0111\u1ed9 II v\u00e0 ch\u1ebf \u0111\u1ed9 III t\u01b0\u01a1ng \u1ee9ng v\u1edbi n\u1ed3ng \u0111\u1ed9 dung d\u1ecbch H2<\/sub>O2 <\/sub>thay \u0111\u1ed5i theo 3 ch\u1ebf \u0111\u1ed9 l\u00e0 5%, 7.5% v\u00e0 10%. M\u1ed7i ch\u1ebf \u0111\u1ed9 th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh v\u1edbi 3 m\u1eabu v\u00e0 l\u1eb7p l\u1ea1i 3 l\u1ea7n.Tr\u1ed9n n\u01b0\u1edbc (H2<\/sub>O) + Hydrogen peoxide (H2<\/sub>O2<\/sub>) + Sodium hydroxide (NaOH) theo t\u1ef7 l\u1ec7 \u0111\u1ecbnh s\u1eb5n, khu\u1ea5y \u0111\u1ec1u. S\u1eed d\u1ee5ng nhi\u1ec7t k\u1ebf, m\u00e1y \u0111o \u0111\u1ed9 pH \u0111\u1ec3 ki\u1ec3m tra c\u00e1c th\u00f4ng s\u1ed1 c\u1ee7a dung d\u1ecbch t\u1ea9y m\u1ea7u. Tr\u01b0\u1edbc khi nh\u00fang m\u1eabu g\u1ed7, dung d\u1ecbch c\u00f3: nhi\u1ec7t \u0111\u1ed9 T0<\/sup>=55\u00b8600<\/sup>C v\u00e0 \u0111\u1ed9pH=10\u00b811.C\u00e1c m\u1eabu g\u1ed7 th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c nh\u00fang v\u00e0o dung d\u1ecbch h\u00f3a ch\u1ea5t \u0111\u00e3 \u0111\u01b0\u1ee3c pha ch\u1ebf, th\u1eddi gian nh\u00fang m\u1eabu trong dung d\u1ecbch t\u1ea9y m\u1ea7u 2 ph\u00fat, trong khi nh\u00fang,c\u1ea7n \u0111\u1ec3 cho dung d\u1ecbch \u01b0\u1edbt \u0111\u1ec1u b\u1ec1 m\u1eb7t g\u1ed7, sau \u0111\u00f3 v\u1edbt ra, th\u1ea5m kh\u00f4 b\u1ec1 m\u1eb7t sau \u0111\u00f3 m\u1eabu g\u1ed7 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o l\u00f2 s\u1ea5y v\u00e0 s\u1ea5y v\u1edbi nhi\u1ec7t \u0111\u1ed9T0<\/sup>= 600<\/sup>C, th\u1eddi gian s\u1ea5y T=60 ph\u00fat.<\/strong> <\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u00e0 th\u1ea3o lu\u1eadn<\/strong>S\u1eed d\u1ee5ng m\u00e1y \u0111o m\u1ea7u quang ph\u1ed5 ph\u1ea3n x\u1ea1 GretagMacbeth ColorEye 2180UV v\u1edbi ngu\u1ed3n s\u00e1ng D65 (ngu\u1ed3n s\u00e1ng m\u00f4 ph\u1ecfng \u00e1nh s\u00e1ng t\u1ef1 nhi\u00ean ban ng\u00e0y) \u0111\u1ec3 \u0111o m\u1ea7u s\u1eafc b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c m\u1eabu khi ch\u01b0a th\u00ed nghi\u1ec7m t\u1ea9y m\u1ea7u v\u00e0 \u0111o m\u1ea7u s\u1eafc c\u1ee7a c\u00e1c m\u1eabu g\u1ed7 \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea9y m\u1ea7u \u1edf 3 ch\u1ebf \u0111\u1ed9 I, II, III. M\u1ed7i ch\u1ebf \u0111\u1ed9 th\u00ed nghi\u1ec7m \u0111o 3 m\u1eabu, m\u1ed7i m\u1eabu \u0111o 3 v\u1ecb tr\u00ed v\u1edbi 31 d\u1ea3i t\u1ea7n s\u1ed1 c\u1ee7a b\u01b0\u1edbc s\u00f3ng t\u1eeb 380nm \u0111\u1ebfn 720nm (v\u1edbi d\u1ea3i b\u01b0\u1edbc s\u00f3ng n\u00e0y, c\u00e1c th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc g\u00e2y n\u00ean m\u1ea7u s\u1eafc \u1edf g\u1ed7 h\u1ea5p th\u1ee5 \u0111\u01b0\u1ee3c v\u00e0 ph\u00e1t ra m\u1ea7u, m\u1eaft ch\u00fang ta s\u1ebd quan s\u00e1t th\u1ea5y)S\u1ed1 li\u1ec7u ch\u1ec9 s\u1ed1 m\u1ea7u s\u1eafc b\u1ec1 m\u1eb7t c\u1ee7a g\u1ed7 Keo tai t\u01b0\u1ee3ng khi ch\u01b0a t\u1ea9y m\u1ea7u \u1edf c\u00e1c b\u01b0\u1edbc s\u00f3ng ch\u1ee7 y\u1ebfu 400nm, 500nm, 600nm, 700nm \u0111\u01b0\u1ee3c ghi \u1edf b\u1ea3ng 3. <\/p>\n","protected":false},"excerpt":{"rendered":"

Hi\u1ec7n nay có nhi\u1ec1u ph\u01b0\u01a1ng pháp c\u0169ng nh\u01b0 có nhi\u1ec1u lo\u1ea1i hóa ch\u1ea5t có th\u1ec3 dùng \u0111\u1ec3 x\u1eed lý b\u1ec1 m\u1eb7t (t\u1ea9y m\u1ea7u) g\u1ed7. Bài báo này nêu k\u1ebft qu\u1ea3 nghiên c\u1ee9u <\/strong>t\u1ea9y m\u1ea7u b\u1ec1 m\u1eb7t g\u1ed7 Keo tai t\u01b0\u1ee3ng, dùng hóa ch\u1ea5t t\u1ea9y m\u1ea7u là H2<\/sub>O2<\/sub> n\u1ed3ng \u0111\u1ed9 là 7,5%, th\u1eddi gian nhúng m\u1eabu vào dung d\u1ecbch t\u1ea9y là 2 phút sau \u0111ó s\u1ea5y v\u1edbi nhi\u1ec7t \u0111\u1ed9 s\u1ea5y là 600<\/sup>C, th\u1eddi gian s\u1ea5y là 60 phút cho k\u1ebft qu\u1ea3 t\u1ea9y tr\u1eafng t\u1ed1t. <\/span>  <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8949"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=8949"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8949\/revisions"}],"predecessor-version":[{"id":10405,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8949\/revisions\/10405"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}