{"id":6436,"date":"2020-11-12T14:49:29","date_gmt":"2020-11-12T07:49:29","guid":{"rendered":"https:\/\/vinatom.gov.vn\/?p=6436"},"modified":"2020-11-12T14:49:29","modified_gmt":"2020-11-12T07:49:29","slug":"mot-phuong-phap-moi-xac-dinh-hoat-do-137-cs-trong-nuoc-bien","status":"publish","type":"post","link":"https:\/\/vinatom.gov.vn\/mot-phuong-phap-moi-xac-dinh-hoat-do-137-cs-trong-nuoc-bien\/","title":{"rendered":"M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u1edbi x\u00e1c \u0111\u1ecbnh ho\u1ea1t \u0111\u1ed9 137-Cs trong n\u01b0\u1edbc bi\u1ec3n"},"content":{"rendered":"<p style=\"text-align: justify;\">Th\u00f4ng qua th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i thu\u1ed9c Ch\u01b0\u01a1ng tr\u00ecnh khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 tr\u1ecdng \u0111i\u1ec3m c\u1ea5p Qu\u1ed1c gia giai \u0111o\u1ea1n 2016 \u2013 2020 v\u1ec1: <em>\u0110\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng ph\u00f4ng ph\u00f3ng x\u1ea1 m\u00f4i tr\u01b0\u1eddng bi\u1ec3n Vi\u1ec7t Nam, nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng ph\u00e1t t\u00e1n v\u00e0 \u1ea3nh h\u01b0\u1edfng ph\u00f3ng x\u1ea1 t\u1eeb c\u00e1c nh\u00e0 m\u00e1y \u0111i\u1ec7n h\u1ea1t nh\u00e2n \u0111ang v\u1eadn h\u00e0nh g\u1ea7n l\u00e3nh th\u1ed5 Vi\u1ec7t Nam<\/em>, m\u00e3 s\u1ed1 KC05.17\/16-20 do TS. Nguy\u1ec5n Tr\u1ecdng Ng\u1ecd l\u00e0m ch\u1ee7 nhi\u1ec7m \u0111\u1ec1 t\u00e0i; T\u1eadp th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i \u0111\u00e3 c\u00f4ng b\u1ed1 m\u1ed9t c\u00f4ng tr\u00ecnh tr\u00ean T\u1ea1p ch\u00ed Qu\u1ed1c t\u1ebf <em>Journal of Radioanalytical and Nuclear Chemistry, <\/em>v\u1edbi ti\u00eau \u0111\u1ec1: Acrylic fibers coated with\u00a0copper hexacyanoferrate to\u00a0determine <sup>137<\/sup>Cs activity in\u00a0coastal seawater of\u00a0Vietnam (<em>S<\/em><em>\u1ee3i acrylic t\u1ea9m hexa-cy-ano-fer-rat-\u0111\u1ed3ng s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ho\u1ea1t \u0111\u1ed9 <sup>137<\/sup>Cs trong n\u01b0\u1edbc bi\u1ec3n ven b\u1edd Vi\u1ec7t Nam)<\/em>.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">Nguy\u00ean t\u1eafc c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p l\u00e0 d\u1ef1a tr\u00ean t\u00ednh ch\u1ea5t h\u1ea5p th\u1ee5 ch\u1ecdn l\u1ecdc \u0111\u1ed1i v\u1edbi Cs l\u00ean c\u00e1c h\u1ee3p ch\u1ea5t hexacyanoferrate c\u1ee7a m\u1ed9t s\u1ed1 nguy\u00ean t\u1ed1 kim lo\u1ea1i chuy\u1ec3n ti\u1ebfp kh\u00e1c nhau nh\u01b0 Co, Ni, Cu v\u00e0 Zn, trong \u0111\u00f3, ph\u1ee9c \u0111\u1ed3ng hexacyanoferrate &#8211; Cu<sub>2<\/sub>[Fe(CN)<sub>6<\/sub>] (vi\u1ebft t\u1eaft l\u00e0 CuHCF) \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn (H\u00ecnh 1 m\u00f4 t\u1ea3 c\u00e1ch chu\u1ea9n b\u1ecb s\u1ee3i CuHCF v\u00e0 cartridge). <sup>137<\/sup>Cs trong n\u01b0\u1edbc bi\u1ec3n \u0111\u01b0\u1ee3c t\u00e1ch v\u00e0 l\u00e0m gi\u00e0u t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng b\u1eb1ng c\u00e1ch b\u01a1m 300 l\u00edt n\u01b0\u1edbc bi\u1ec3n qua cartridge ch\u1ee9a 40 gam s\u1ee3i acrylic t\u1ea9m CuHCF do nh\u00f3m t\u00e1c gi\u1ea3 ch\u1ebf t\u1ea1o, v\u1edbi l\u01b0u l\u01b0\u1ee3ng 2 l\u00edt\/ph\u00fat, sau \u0111\u00f3 chuy\u1ec3n s\u1ee3i acrylic t\u1ea9m CuHCF \u0111\u00e3 h\u1ea5p th\u1ee5 <sup>137<\/sup>Cs n\u00e0y \u0111o tr\u00ean thi\u1ebft b\u1ecb ph\u1ed5 k\u1ebf gamma ph\u00f4ng th\u1ea5p \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ho\u1ea1t \u0111\u1ed9 <sup>137<\/sup>Cs. Ph\u01b0\u01a1ng ph\u00e1p c\u00f3 hi\u1ec7u su\u1ea5t t\u00e1ch <sup>137<\/sup>Cs \u0111\u1ea1t tr\u00ean 99%, gi\u1edbi h\u1ea1n ph\u00e1t hi\u1ec7n l\u00e0 0,12 Bq\/m<sup>3<\/sup>.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><strong><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-6437\" src=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2020\/11\/12.11.20.3.jpg\" alt=\"\" width=\"414\" height=\"253\" \/><\/strong><em>H\u00ecnh 1.<\/em><em> Chu\u1ea9n b\u1ecb cartridge ch\u1ee9a s\u1ee3i CuHCF<\/em><\/p>\n<p style=\"text-align: center;\"><em>a. S\u1ee3i acrylic \u0111\u01b0\u1ee3c ng\u00e2m trong h\u1ed7n h\u1ee3p dung d\u1ecbch 0,05M K<sub>4<\/sub>[Fe(CN)<sub>6<\/sub>] v\u00e0 0,10M Cu(NO<sub>3<\/sub>)<sub>2<\/sub>;<\/em><\/p>\n<p style=\"text-align: center;\"><em>b. S\u1ee3i acrylic \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea9m CuHCF;<\/em><\/p>\n<p style=\"text-align: center;\"><em>c. Cartridge CuHCF.<\/em><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">\u00c1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh <sup>137<\/sup>Cs trong n\u01b0\u1edbc bi\u1ec3n Ph\u01b0\u1edbc Dinh v\u00e0 V\u0129nh H\u1ea3i, t\u1ec9nh Ninh Thu\u1eadn; k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c cho th\u1ea5y d\u1ea3i ho\u1ea1t \u0111\u1ed9 ri\u00eang c\u1ee7a \u0111\u1ed3ng v\u1ecb ph\u00f3ng x\u1ea1 <sup>137<\/sup>Cs trong c\u00e1c m\u1eabu th\u1ef1c nghi\u1ec7m n\u1eb1m trong kho\u1ea3ng 1,14 \u00f7 1,44 Bq\/m<sup>3<\/sup>. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch trong c\u00f4ng tr\u00ecnh n\u00e0y c\u0169ng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed3ng k\u1ebft t\u1ee7a (1,05\u00f71,57 Bq\/m<sup>3<\/sup>) \u0111\u00e3 th\u1ef1c hi\u1ec7n c\u00f9ng th\u1eddi gian trong khu\u00f4n kh\u1ed5 Ch\u01b0\u01a1ng tr\u00ecnh quan tr\u1eafc ph\u00f3ng x\u1ea1 m\u00f4i tr\u01b0\u1eddng bi\u1ec3n th\u01b0\u1eddng ni\u00ean do Vi\u1ec7n Nghi\u00ean c\u1ee9u h\u1ea1t nh\u00e2n ch\u1ee7 tr\u00ec th\u1ef1c hi\u1ec7n; \u0111\u1ed3ng th\u1eddi c\u0169ng t\u01b0\u01a1ng \u0111\u1ed3ng v\u1edbi c\u00e1c k\u1ebft qu\u1ea3 c\u00f9ng lo\u1ea1i do c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c tr\u00ean th\u1ebf gi\u1edbi th\u1ef1c hi\u1ec7n trong khu v\u1ef1c bi\u1ec3n \u0110\u00f4ng (nh\u01b0 Trung Qu\u1ed1c, Th\u00e1i Lan\u2026).<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">\u01afu \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p n\u00e0y l\u00e0 m\u1eabu n\u01b0\u1edbc bi\u1ec3n \u0111\u01b0\u1ee3c l\u1ecdc tr\u1ef1c ti\u1ebfp qua cartridge ch\u1ee9a s\u1ee3i acrylic t\u1ea9m CuHCF trong \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng t\u1ef1 nhi\u00ean (kh\u00f4ng c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh pH c\u1ee7a m\u1eabu), vi\u1ec7c thu g\u00f3p, t\u00e1ch v\u00e0 l\u00e0m gi\u00e0u m\u1eabu th\u1ef1c hi\u1ec7n ngay t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng d\u1ec5 d\u00e0ng, nhanh ch\u00f3ng (ch\u1ec9 m\u1ea5t kho\u1ea3ng 3 gi\u1edd\/m\u1eabu); c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n t\u1ef1 \u0111\u1ed9ng, \u0111\u1ed3ng lo\u1ea1t v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed c\u0169ng nh\u01b0 th\u1eddi gian ph\u00e2n t\u00edch. So v\u1edbi ph\u01b0\u01a1ng ph\u00e1p k\u1ebft t\u1ee7a, th\u1eddi gian th\u1ef1c hi\u1ec7n t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng m\u1ea5t kho\u1ea3ng 10 gi\u1edd; sau khi \u0111\u01b0a v\u1ec1 ph\u00f2ng th\u00ed nghi\u1ec7m ph\u1ea3i x\u1eed l\u00fd nhi\u1ec1u c\u00f4ng \u0111o\u1ea1n nh\u01b0 s\u1ea5y, nung, nghi\u1ec1n kho\u1ea3ng 48 gi\u1edd tr\u01b0\u1edbc khi \u0111o ph\u1ed5 gamma.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 x\u00e2y d\u1ef1ng h\u1ec7 thi\u1ebft b\u1ecb quan tr\u1eafc ph\u00f3ng x\u1ea1 <sup>137<\/sup>Cs trong n\u01b0\u1edbc bi\u1ec3n tr\u1ef1c tuy\u1ebfn ph\u1ee5c v\u1ee5 c\u1ea3nh b\u00e1o nhanh. Ph\u01b0\u01a1ng ph\u00e1p c\u00f3 th\u1ec3 \u0111\u01b0a v\u00e0o \u00e1p d\u1ee5ng cho c\u00e1c Ch\u01b0\u01a1ng tr\u00ecnh quan tr\u1eafc, nghi\u00ean c\u1ee9u m\u00f4i tr\u01b0\u1eddng c\u1ee7a Qu\u1ed1c gia trong th\u1eddi gian t\u1edbi.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: right;\"><strong>Nguy\u1ec5n Tr\u1ecdng Ng\u1ecd,\u00a0<\/strong><strong>Vi\u1ec7n Nghi\u00ean c\u1ee9u h\u1ea1t nh\u00e2n<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Th\u00f4ng qua th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i thu\u1ed9c Ch\u01b0\u01a1ng tr\u00ecnh khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 tr\u1ecdng \u0111i\u1ec3m c\u1ea5p Qu\u1ed1c gia giai \u0111o\u1ea1n 2016 \u2013 2020 v\u1ec1: \u0110\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng ph\u00f4ng ph\u00f3ng x\u1ea1 m\u00f4i tr\u01b0\u1eddng bi\u1ec3n Vi\u1ec7t Nam, nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng ph\u00e1t t\u00e1n v\u00e0 \u1ea3nh h\u01b0\u1edfng ph\u00f3ng x\u1ea1 t\u1eeb c\u00e1c nh\u00e0 m\u00e1y \u0111i\u1ec7n h\u1ea1t nh\u00e2n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6437,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-6436","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tong-hop"],"_links":{"self":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/6436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/comments?post=6436"}],"version-history":[{"count":0,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/6436\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/media?parent=6436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/categories?post=6436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/tags?post=6436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}