{"id":10250,"date":"2020-08-24T16:29:52","date_gmt":"2020-08-24T08:29:52","guid":{"rendered":"https:\/\/dmi65.com\/case-studies\/loai-bo-asen-tu-nuoc-uong-su-dung-phuong-tien-xuc-tac\/"},"modified":"2020-08-24T16:29:53","modified_gmt":"2020-08-24T08:29:53","slug":"loai-bo-asen-tu-nuoc-uong-su-dung-phuong-tien-xuc-tac","status":"publish","type":"post","link":"https:\/\/dmi65.com\/vi\/case-studies\/loai-bo-asen-tu-nuoc-uong-su-dung-phuong-tien-xuc-tac\/","title":{"rendered":"Lo\u1ea1i b\u1ecf asen t\u1eeb n\u01b0\u1edbc u\u1ed1ng s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n x\u00fac t\u00e1c"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text]<strong>N\u01b0\u1edbc u\u1ed1ng lo\u1ea1i b\u1ecf asen:<\/strong> Asen l\u00e0 m\u1ed9t ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y t\u1ef1 nhi\u00ean trong c\u00e1c ngu\u1ed3n t\u00e0i nguy\u00ean b\u1ec1 m\u1eb7t v\u00e0 n\u01b0\u1edbc ng\u1ea7m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 cung c\u1ea5p u\u1ed1ng. C\u00e1c gi\u00e1 tr\u1ecb ti\u00eau bi\u1ec3u \u1edf <a href=\"https:\/\/en.wikipedia.org\/wiki\/Waikato_River\" target=\"_blank\" rel=\"noopener noreferrer\">s\u00f4ng Waikato<\/a> \u1edf New Zealand l\u00e0 kho\u1ea3ng 20 ph\u1ea7n t\u1ef7 (ppb) trong khi ti\u00eau chu\u1ea9n n\u01b0\u1edbc u\u1ed1ng c\u1ee7a New Zealand l\u00e0 10 ppb. N\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t m\u1ed1i quan t\u00e2m l\u1edbn v\u00e0 th\u00e1ch th\u1ee9c trong vi\u1ec7c cung c\u1ea5p n\u01b0\u1edbc do t\u00ednh \u0111\u1ed9c h\u1ea1i v\u00e0 ch\u1ea5t g\u00e2y ung th\u01b0 c\u1ee7a n\u00f3. C\u00e1c ngu\u1ed3n \u00f4 nhi\u1ec5m asen trong b\u1ec1 m\u1eb7t v\u00e0 n\u01b0\u1edbc ng\u1ea7m c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb c\u1ea3 hai nguy\u00ean li\u1ec7u t\u1ef1 nhi\u00ean v\u00e0 anthropogenic. Trong m\u00f4i tr\u01b0\u1eddng gi\u00e0u \u00f4xy, n\u01a1i \u0111i\u1ec1u ki\u1ec7n Aerobic v\u1eabn t\u1ed3n t\u1ea1i v\u00e0 theo \u0111i\u1ec1u ki\u1ec7n pH t\u1ef1 nhi\u00ean, as (V) l\u00e0 chi\u1ebfm \u01b0u th\u1ebf, trong khi as (III) chi ph\u1ed1i trong m\u1ed9t m\u00f4i tr\u01b0\u1eddng gi\u1ea3m v\u1eeba ph\u1ea3i v\u1edbi \u0111i\u1ec1u ki\u1ec7n thi\u1ebfu oxy nh\u01b0 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c v\u00f9ng n\u01b0\u1edbc m\u1eb7t \u0111\u1ea5t. M\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n x\u00fac t\u00e1c d\u1ef1a tr\u00ean silica \u0111\u01b0\u1ee3c \u0111\u00e1nh \u01b0\u1edbc \u0111\u1ec3 lo\u1ea1i b\u1ecf asen. B\u0103ng gh\u1ebf d\u1ef1 b\u1ecb h\u00e0ng \u0111\u1ea7u v\u00e0 c\u00e1c th\u1eed nghi\u1ec7m h\u00e0ng lo\u1ea1t \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 nghi\u00ean c\u1ee9u hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n th\u00f4ng x\u00fac t\u00e1c trong m\u1ed9t lo\u1ea1t c\u00e1c \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<p><strong>T\u1eeb kho\u00e1<\/strong><br \/>\nLo\u1ea1i b\u1ecf asen, n\u01b0\u1edbc u\u1ed1ng, ph\u01b0\u01a1ng ti\u1ec7n x\u00fac t\u00e1c, lo\u1ea1i b\u1ecf asen kh\u1ecfi n\u01b0\u1edbc u\u1ed1ng<\/p>\n<p><strong>V\u1eadt li\u1ec7u: <\/strong> <a href=\"https:\/\/dmi65.com\/vi\/ky-thuat\/lam-the-nao-no-works\/\">dmi-65<\/a> \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb Quantum l\u1ecdc Trung t\u00e2m t\u00e0i s\u1ea3n c\u00f4ng ty TNHH v\u00e0 k\u00edch ho\u1ea1t b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng Sodium hypochlorite (naocl) tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng cho c\u1ea3 c\u1ed9t v\u00e0 c\u00e1c th\u00ed nghi\u1ec7m h\u1ea5p ph\u1ee5 h\u00e0ng lo\u1ea1t. C\u00e1c gi\u1ea3i ph\u00e1p ch\u1ee9ng kho\u00e1n c\u1ee7a as (V) (100 mg\/L) \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb b\u1eb1ng h\u00f2a tan As2O5 (Sigma-Aldrich, 99%) trong n\u01b0\u1edbc kh\u1eed ion (18,2 M\u03a9 cm-1; Barnstead, EASYpure). C\u00e1c gi\u1ea3i ph\u00e1p ch\u1ee9ng kho\u00e1n \u0111\u01b0\u1ee3c pha lo\u00e3ng v\u1edbi n\u01b0\u1edbc kh\u1eed ion \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u as (V) gi\u1ea3i ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c th\u00ed nghi\u1ec7m n\u00e0y. M\u1ed9t gi\u1ea3i ph\u00e1p ch\u1ee9ng kho\u00e1n c\u1ee7a 50 g\/l ferric Chloride (FeCl3) v\u00e0 5 mg\/l naocl \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb trong m\u1ed9t flask th\u1ec3 t\u00edch v\u00e0 pha lo\u00e3ng v\u1edbi n\u1ed3ng \u0111\u1ed9 y\u00eau c\u1ea7u c\u1ee7a 50 mg\/l FeCl3 v\u00e0 5 mg\/l naocl. C\u00e1c \u0111i\u1ec1u ch\u1ec9nh pH \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng 0,1 M axit clohi\u0111ric (HCl) v\u00e0 0,1 M natri hydroxit (NaOH) gi\u1ea3i ph\u00e1p. T\u1ea5t c\u1ea3 h\u00f3a ch\u1ea5t v\u00e0 thu\u1ed1c th\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00f4ng vi\u1ec7c n\u00e0y l\u00e0 c\u1ea5p ph\u00e2n t\u00edch.<\/p>\n<p><strong>K\u1ebft qu\u1ea3:<\/strong><\/p>\n<blockquote><p>V\u00ec v\u1eady, t\u1eeb c\u00e1c k\u1ebft qu\u1ea3 trong \u0111i\u1ec1u tra n\u00e0y, n\u00f3 cho th\u1ea5y r\u00f5 r\u00e0ng r\u1eb1ng DMI 65 c\u00f3 ti\u1ec1m n\u0103ng l\u1edbn trong vi\u1ec7c lo\u1ea1i b\u1ecf as (V) t\u1eeb n\u01b0\u1edbc u\u1ed1ng \u0111\u1ebfn \u00edt h\u01a1n 10 \u03bcg\/L, \u0111\u00f3 l\u00e0 ti\u00eau chu\u1ea9n thi\u1ebft l\u1eadp b\u1edfi WHO, US EPA v\u00e0 DWSNZ. C\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 vi\u1ec7c lo\u1ea1i b\u1ecf as (III) s\u1eed d\u1ee5ng DMI-65, v\u00e0 c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 s\u1eed d\u1ee5ng c\u00e1c t\u00e0i li\u1ec7u kh\u00e1c cho as (III) v\u00e0 as (V) hi\u1ec7n \u0111ang di\u1ec5n ra t\u1ea1i \u0110\u1ea1i h\u1ecdc Waikato, New Zealand.<\/p><\/blockquote>\n<p><span style=\"text-decoration: underline;\">T\u1ea3i v\u1ec1 nghi\u00ean c\u1ee9u tr\u01b0\u1eddng h\u1ee3p \u0111\u1ea7y \u0111\u1ee7 cho &#8220;lo\u1ea1i b\u1ecf asen t\u1eeb n\u01b0\u1edbc u\u1ed1ng s\u1eed d\u1ee5ng silica ch\u1ea5t x\u00fac t\u00e1c d\u1ef1a tr\u00ean ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n th\u00f4ng&#8221; d\u01b0\u1edbi \u0111\u00e2y.<\/span>[\/vc_column_text][vc_btn title=&#8221;T\u1ea3i v\u1ec1 tr\u01b0\u1eddng h\u1ee3p nghi\u00ean c\u1ee9u&#8221; style=&#8221;custom&#8221; custom_background=&#8221;#dd3333&#8243; custom_text=&#8221;#ffffff&#8221; shape=&#8221;square&#8221; i_icon_fontawesome=&#8221;far fa-file-pdf&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:%2FWp-content%2Fuploads%2F2020%2F08%2FNZ-arsenic-Removal-from-Drinking-water-using-silica-based-x%C3%BAc%20t%C3%A1c|&#8221;][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text]N\u01b0\u1edbc u\u1ed1ng lo\u1ea1i b\u1ecf asen: Asen l\u00e0 m\u1ed9t ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y t\u1ef1 nhi\u00ean trong c\u00e1c ngu\u1ed3n t\u00e0i nguy\u00ean b\u1ec1 m\u1eb7t v\u00e0 n\u01b0\u1edbc ng\u1ea7m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 cung c\u1ea5p u\u1ed1ng. C\u00e1c gi\u00e1 tr\u1ecb ti\u00eau bi\u1ec3u \u1edf s\u00f4ng Waikato \u1edf New Zealand l\u00e0 kho\u1ea3ng 20 ph\u1ea7n t\u1ef7 (ppb)&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[44],"tags":[],"class_list":["post-10250","post","type-post","status-publish","format-standard","hentry","category-uncategorized-vi","category-44","description-off"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Lo\u1ea1i b\u1ecf asen t\u1eeb n\u01b0\u1edbc u\u1ed1ng s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n x\u00fac t\u00e1c - DMI-65\u00ae<\/title>\n<meta name=\"description\" content=\"T\u1eeb k\u1ebft qu\u1ea3 \u0111i\u1ec1u tra, n\u00f3 cho th\u1ea5y DMI-65 c\u00f3 ti\u1ec1m n\u0103ng \u0111\u00e1ng k\u1ec3 \u0111\u1ec3 lo\u1ea1i b\u1ecf asen kh\u1ecfi n\u01b0\u1edbc u\u1ed1ng.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dmi65.com\/vi\/case-studies\/loai-bo-asen-tu-nuoc-uong-su-dung-phuong-tien-xuc-tac\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lo\u1ea1i b\u1ecf asen t\u1eeb n\u01b0\u1edbc u\u1ed1ng s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n x\u00fac t\u00e1c - 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