{"id":116166,"date":"2022-05-17T10:00:05","date_gmt":"2022-05-17T02:00:05","guid":{"rendered":"https:\/\/www.alpapowder.com\/116166\/"},"modified":"2022-05-17T11:30:10","modified_gmt":"2022-05-17T03:30:10","slug":"nghien-kho-cua-bot-sieu-min-duoi-25-micron-va-pm-25","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/116166\/","title":{"rendered":"Nghi\u1ec1n kh\u00f4 c\u1ee7a b\u1ed9t si\u00eau m\u1ecbn d\u01b0\u1edbi 2,5 micron v\u00e0 PM 2,5"},"content":{"rendered":"

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  1. T\u1ea1i sao ch\u00fang ta n\u00ean b\u1eaft \u0111\u1ea7u v\u1edbi PM2.5 cho m\u1ed1i quan h\u1ec7 gi\u1eefa kh\u00f3i m\u00f9 v\u00e0 ph\u00e2n lo\u1ea1i kh\u00f4 c\u1ee7a b\u1ed9t si\u00eau m\u1ecbn? Theo t\u00f4i, 2,5 micron l\u00e0 m\u1ed9t d\u1eef li\u1ec7u \u0111\u1eb7c bi\u1ec7t cho c\u00e1c h\u1ea1t ph\u00e2n t\u00e1ch, v\u00e0 b\u00e2y gi\u1edd ch\u00fang ta \u0111\u1ec1u bi\u1ebft m\u1ed9t th\u00f4ng s\u1ed1 kh\u00ed t\u01b0\u1ee3ng: PM2,5. \u0110\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c h\u1ea1t trong kh\u00f4ng kh\u00ed xung quanh c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng kh\u00ed \u0111\u1ed9ng h\u1ecdc nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng 2,5 micron. So v\u1edbi c\u00e1c h\u1ea1t th\u00f4 h\u01a1n trong kh\u00ed quy\u1ec3n, PM2.5 c\u00f3 k\u00edch th\u01b0\u1edbc h\u1ea1t nh\u1ecf, di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u1edbn, ho\u1ea1t \u0111\u1ed9ng m\u1ea1nh v\u00e0 c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 th\u1eddi gian c\u01b0 tr\u00fa l\u00e2u trong kh\u00ed quy\u1ec3n v\u00e0 kho\u1ea3ng c\u00e1ch v\u1eadn chuy\u1ec3n d\u00e0i. N\u00f3 l\u00e0 m\u1ed9t h\u1ea1t m\u1ecbn r\u1ea5t kh\u00f3 v\u01b0\u1ee3t qua. C\u00e1c h\u1ea1t v\u1eeba v\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn tu\u00e2n theo c\u00e1c quy lu\u1eadt chuy\u1ec3n \u0111\u1ed9ng kh\u00e1c nhau. Lo\u1ea1i b\u1ed9t si\u00eau m\u1ecbn d\u01b0\u1edbi 2,5 micron c\u00f3 quy lu\u1eadt chuy\u1ec3n \u0111\u1ed9ng \u0111\u1eb7c bi\u1ec7t h\u01a1n, \u0111i\u1ec1u n\u00e0y \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t b\u00e0i to\u00e1n kh\u00f3 \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 khoa h\u1ecdc v\u1ec1 b\u1ed9t \u1edf nhi\u1ec1u qu\u1ed1c gia kh\u00e1c nhau trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t b\u1ed9t kh\u00f4. D\u01b0\u1edbi thang \u0111o n\u00e0y, r\u1ea5t kh\u00f3 \u0111\u1ec3 ph\u00e2n lo\u1ea1i c\u00e1c h\u1ea1t trong kh\u00f4ng kh\u00ed, c\u00f3 ngh\u0129a l\u00e0, v\u1eabn c\u00f2n kh\u00f3 kh\u0103n \u0111\u1ec3 t\u00e1ch c\u00e1c h\u1ea1t b\u1ed9t c\u00f3 k\u00edch th\u01b0\u1edbc d\u01b0\u1edbi 2,5 micron trong ng\u00e0nh c\u00f4ng nghi\u1ec7p b\u1ed9t hi\u1ec7n \u0111\u1ea1i. Do \u0111\u00f3, vi\u1ec7c nghi\u00ean c\u1ee9u PM2.5 c\u00f3 \u00fd ngh\u0129a ch\u1ec9 \u0111\u1ea1o th\u1ef1c ti\u1ec5n \u0111\u1ed1i v\u1edbi vi\u1ec7c s\u1ea3n xu\u1ea5t h\u1ea1t b\u1ed9t si\u00eau m\u1ecbn hi\u1ec7n \u0111\u1ea1i ph\u1ee5c v\u1ee5 cho qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t kh\u00f4 li\u00ean t\u1ee5c c\u00e1c h\u1ea1t chia nh\u1ecf tr\u00ean 6000 mesh. \n

    \u0110\u00e1nh gi\u00e1 v\u00e0 tri\u1ec3n v\u1ecdng ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 ph\u00e2n lo\u1ea1i b\u1ed9t M\u1ed9t d\u1eef li\u1ec7u th\u00fa v\u1ecb kh\u00e1c l\u00e0 PM25, \u1edf \u0111\u00e2y t\u00f4i \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c h\u1ea1t b\u1ed9t c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng t\u1eeb 25 micron tr\u1edf l\u00ean. Trong qu\u00e1 tr\u00ecnh ph\u00e2n lo\u1ea1i h\u1ea1t b\u1ed9t, qu\u00e1 tr\u00ecnh s\u00e0ng l\u1ecdc \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong s\u1ea3n xu\u1ea5t c\u00e1c lo\u1ea1i b\u1ed9t kh\u00e1c nhau, th\u01b0\u1eddng th\u1ea5y trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y, c\u00f3 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p l\u1edbn nh\u01b0 c\u00f4ng nghi\u1ec7p v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng v\u00e0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m. . Trong \u0111i\u1ec1u ki\u1ec7n s\u1ea3n xu\u1ea5t b\u1ed9t, 25 micron x\u1ea5p x\u1ec9 k\u00edch th\u01b0\u1edbc l\u1ed7 c\u1ee7a m\u1ed9t m\u00e0n h\u00ecnh 600 mesh. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t chuy\u00ean nghi\u1ec7p tham gia v\u00e0o s\u00e0ng rung si\u00eau \u00e2m \u0111\u1ec1u bi\u1ebft: 600 mesh l\u00e0 d\u1eef li\u1ec7u g\u1ea7n v\u1edbi gi\u1edbi h\u1ea1n cho s\u00e0ng h\u1ea1t b\u1ed9t n\u00f3i chung, v\u00e0 r\u1ea5t kh\u00f3 \u0111\u1ec3 s\u00e0ng b\u1ed9t m\u1ecbn v\u1ec1 m\u1eb7t c\u01a1 h\u1ecdc. \u0110\u00e2y l\u00e0 s\u1ef1 tr\u00f9ng h\u1ee3p ng\u1eabu nhi\u00ean hay l\u00e0 quy lu\u1eadt, ch\u00fang ta v\u1eabn ch\u01b0a bi\u1ebft, s\u1ef1 t\u1ed3n t\u1ea1i l\u00e0 s\u1ef1 th\u1eadt, h\u00e3y ch\u1edd th\u00eam nhi\u1ec1u ng\u01b0\u1eddi nghi\u00ean c\u1ee9u v\u1ec1 n\u00f3.<\/p>\n

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    C\u00f3 th\u1ec3 c\u00f3 m\u1ed9t d\u1eef li\u1ec7u c\u00f3 \u00fd ngh\u0129a h\u01a1n: 250 nanomet. C\u00e1i g\u1ecdi l\u00e0 c\u00f4ng ngh\u1ec7 nano \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t c\u00f4ng ngh\u1ec7 m\u1edbi nghi\u00ean c\u1ee9u c\u00e1c quy lu\u1eadt chuy\u1ec3n \u0111\u1ed9ng v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u00e1c \u0111i\u1ec7n t\u1eed, nguy\u00ean t\u1eed v\u00e0 ph\u00e2n t\u1eed trong quy m\u00f4 t\u1eeb 0,1 \u0111\u1ebfn 100 nanomet. V\u00ec s\u1ef1 ph\u00e2n b\u1ed1 c\u1ee7a b\u1ed9t si\u00eau m\u1ecbn n\u1eb1m trong m\u1ed9t ph\u1ea1m vi nh\u1ea5t \u0111\u1ecbnh, nhi\u1ec1u h\u1ecdc gi\u1ea3 tin r\u1eb1ng b\u1ed9t h\u1ea1t d\u01b0\u1edbi 500 nanomet l\u00e0 m\u1ed9t gi\u1edbi h\u1ea1n quy m\u00f4 c\u1ee7a c\u00f4ng ngh\u1ec7 nano. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, h\u1ea7u h\u1ebft c\u00e1c h\u1ea1t \u0111\u00e3 \u0111\u1ea1t d\u01b0\u1edbi 100 nanomet n\u00ean n\u00f3 c\u0169ng xu\u1ea5t hi\u1ec7n c\u00e1c T\u00ednh ch\u1ea5t l\u00fd h\u00f3a \u0111\u1eb7c bi\u1ec7t c\u1ee7a c\u00e1c h\u1ea1t c\u00f3 k\u00edch th\u01b0\u1edbc nano. Theo t\u00f4i, D97 c\u00f3 k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd l\u00e0 500 nanomet. \u0110\u00e2y s\u1ebd l\u00e0 m\u1ed9t \u0111\u1ec9nh cao kh\u00e1c c\u1ee7a b\u1ed9t kh\u00f4ng d\u1ec5 leo l\u00ean trong c\u00f4ng ngh\u1ec7 nghi\u1ec1n v\u00e0 ph\u00e2n lo\u1ea1i b\u1ed9t, \u0111\u1ed3ng th\u1eddi s\u1ebd l\u00e0 m\u1ed9t h\u01b0\u1edbng ph\u00e1t tri\u1ec3n m\u1edbi kh\u00e1c cho s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a b\u1ed9t trong t\u01b0\u01a1ng lai. C\u1ed9ng \u0111\u1ed3ng h\u1ecdc thu\u1eadt n\u00f3i chung tin r\u1eb1ng \u0111\u1ed1i v\u1edbi b\u1ed9t ho\u1eb7c s\u1ee3i r\u1eafn, khi k\u00edch th\u01b0\u1edbc m\u1ed9t chi\u1ec1u c\u1ee7a n\u00f3 nh\u1ecf h\u01a1n 100nm, t\u1ee9c l\u00e0 \u0111\u1ea1t \u0111\u1ebfn k\u00edch th\u01b0\u1edbc nanomet, n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 v\u1eadt li\u1ec7u nano. \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ea1t h\u00ecnh c\u1ea7u l\u00fd t\u01b0\u1edfng, khi di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u1edbn h\u01a1n 60m2 \/ g, \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a n\u00f3 s\u1ebd nh\u1ecf h\u01a1n 100nm, \u0111\u1ea1t k\u00edch th\u01b0\u1edbc nanomet.<\/p>\n

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    Nghi\u00ean c\u1ee9u \u00fd ngh\u0129a th\u1ef1c ti\u1ec5n c\u1ee7a vi\u1ec7c ph\u00e2n lo\u1ea1i kh\u00f4 c\u00e1c lo\u1ea1i b\u1ed9t si\u00eau m\u1ecbn d\u01b0\u1edbi 2,5 micron. C\u00e1c h\u1ea1t b\u1ed9t c\u00f3 k\u00edch th\u01b0\u1edbc d\u01b0\u1edbi 2,5 micron s\u1ebd th\u1ec3 hi\u1ec7n nhi\u1ec1u \u0111\u1eb7c \u0111i\u1ec3m m\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u01b0\u1edbt s\u1eed d\u1ee5ng quy tr\u00ecnh s\u1ea3n xu\u1ea5t kh\u00f4 kh\u00f4ng th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c. N\u00f3 c\u0169ng l\u00e0 c\u00f4ng ngh\u1ec7 ch\u1ee7 ch\u1ed1t \u0111\u1ec3 s\u1ea3n xu\u1ea5t b\u1ed9t trong m\u1ed9t s\u1ed1 ng\u00e0nh c\u00f4ng nghi\u1ec7p.<\/p>\n

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    Tuy nhi\u00ean, c\u00e1c h\u1ea1t b\u1ed9t c\u00f3 k\u00edch th\u01b0\u1edbc d\u01b0\u1edbi 2,5 micromet gi\u1ed1ng nh\u01b0 m\u1ed9t ch\u00fa nh\u00edm s\u1ed1ng \u0111\u1ed9ng, ngh\u1ecbch ng\u1ee3m v\u00e0 si\u00eau n\u0103ng \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t b\u1ed9t kh\u00f4, v\u00e0 m\u1ecdi ng\u01b0\u1eddi d\u01b0\u1eddng nh\u01b0 kh\u00f4ng c\u00f3 c\u00e1ch n\u00e0o \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ch\u00fang. \u00d4 nhi\u1ec5m kh\u00f3i b\u1ee5i PM2.5 \u0111\u00e3 l\u00e0m x\u00e1o tr\u1ed9n gi\u1ea5c ng\u1ee7 c\u1ee7a ng\u01b0\u1eddi d\u00e2n v\u00e0 g\u00e2y ra nh\u1eefng thi\u1ec7t h\u1ea1i kh\u00f4n l\u01b0\u1eddng v\u1ec1 kinh t\u1ebf v\u00e0 s\u1ee9c kh\u1ecfe c\u1ee7a ng\u01b0\u1eddi d\u00e2n. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi c\u00e1c chuy\u00ean gia nghi\u00ean c\u1ee9u v\u1eadt li\u1ec7u b\u1ed9t si\u00eau m\u1ecbn c\u1ee7a ch\u00fang t\u00f4i, \u0111\u00e2y c\u0169ng l\u00e0 s\u00e1ch gi\u00e1o khoa t\u1ed1t nh\u1ea5t v\u00e0 l\u00e0 ph\u00f2ng th\u00ed nghi\u1ec7m mi\u1ec5n ph\u00ed \u0111\u1ec3 nghi\u00ean c\u1ee9u v\u1eadt li\u1ec7u b\u1ed9t si\u00eau m\u1ecbn. Nghi\u00ean c\u1ee9u c\u00e1c quy lu\u1eadt s\u1ea3n xu\u1ea5t, ph\u00e2n lo\u1ea1i, thu gom v\u00e0 ph\u00e2n t\u00e1n c\u1ee7a n\u00f3 s\u1ebd kh\u00f4ng ch\u1ec9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ng\u00e0y nay Ng\u00e0nh c\u00f4ng nghi\u1ec7p b\u1ed9t si\u00eau m\u1ecbn c\u00f3 \u00fd ngh\u0129a \u0111\u1ecbnh h\u01b0\u1edbng th\u1ef1c t\u1ebf v\u00e0 c\u0169ng c\u00f3 \u00fd ngh\u0129a \u0111\u1ecbnh h\u01b0\u1edbng l\u00fd thuy\u1ebft to l\u1edbn \u0111\u1ed1i v\u1edbi vi\u1ec7c qu\u1ea3n l\u00fd kh\u00f3i m\u00f9.<\/p>\n

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    S\u1ea3n xu\u1ea5t kh\u00f4 c\u00e1c h\u1ea1t b\u1ed9t c\u00f3 k\u00edch th\u01b0\u1edbc d\u01b0\u1edbi 2,5 micron l\u00e0 m\u1ed9t d\u1ef1 \u00e1n s\u1ea3n xu\u1ea5t mang t\u00ednh t\u01b0\u01a1ng lai trong ng\u00e0nh c\u00f4ng nghi\u1ec7p b\u1ed9t hi\u1ec7n \u0111\u1ea1i. C\u00e1c qu\u1ed1c gia \u0111ang th\u1ef1c hi\u1ec7n c\u00e1c l\u00fd thuy\u1ebft v\u00e0 quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u01a1 b\u1ea3n v\u1edbi tri\u1ec3n v\u1ecdng c\u00f4ng nghi\u1ec7p r\u1ed9ng l\u1edbn. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u00f4 h\u1ea1n trong nhi\u1ec1u l\u0129nh v\u1ef1c nh\u01b0 s\u1ea3n xu\u1ea5t hi\u1ec7n \u0111\u1ea1i, c\u00f4ng ngh\u1ec7 qu\u1ed1c ph\u00f2ng, v\u1eadt li\u1ec7u composite, ch\u1ebf bi\u1ebfn y h\u1ecdc c\u1ed5 truy\u1ec1n Trung Qu\u1ed1c, c\u00f4ng nghi\u1ec7p g\u1ed1m s\u1ee9, c\u00f4ng nghi\u1ec7p b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng, y t\u1ebf v\u00e0 ch\u0103m s\u00f3c s\u1ee9c kh\u1ecfe, v.v.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    T\u1ea1i sao ch\u00fang ta n\u00ean b\u1eaft \u0111\u1ea7u v\u1edbi PM2.5 cho m\u1ed1i quan h\u1ec7 gi\u1eefa kh\u00f3i m\u00f9 v\u00e0 ph\u00e2n lo\u1ea1i kh\u00f4 c\u1ee7a b\u1ed9t si\u00eau m\u1ecbn? Theo t\u00f4i, 2,5 micron l\u00e0 m\u1ed9t d\u1eef li\u1ec7u \u0111\u1eb7c bi\u1ec7t cho c\u00e1c h\u1ea1t ph\u00e2n t\u00e1ch, v\u00e0 b\u00e2y gi\u1edd ch\u00fang ta \u0111\u1ec1u bi\u1ebft m\u1ed9t th\u00f4ng s\u1ed1 kh\u00ed t\u01b0\u1ee3ng: PM2,5.<\/p>\n","protected":false},"author":7,"featured_media":116139,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-116166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghiep-tin-tuc-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/116166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=116166"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/116166\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/116139"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=116166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=116166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=116166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}