{"id":40752,"date":"2020-10-04T09:00:45","date_gmt":"2020-10-04T07:00:45","guid":{"rendered":"https:\/\/www.bioecoactual.com\/?p=40752"},"modified":"2020-10-02T12:19:29","modified_gmt":"2020-10-02T10:19:29","slug":"metalls-pesants-en-els-aliments","status":"publish","type":"post","link":"https:\/\/www.bioecoactual.com\/ca\/2020\/10\/04\/metalls-pesants-en-els-aliments\/","title":{"rendered":"Metalls pesants en els aliments?"},"content":{"rendered":"<p>Els metalls pesants com <strong>el plom, el mercuri, el cadmi o l&#8217;estany<\/strong> s\u00f3n <strong>elements t\u00f2xics<\/strong> que estan en el medi ambient i passen inevitablement a la cadena aliment\u00e0ria, inclosos aliments que mengem habitualment. Per aix\u00f2 s\u2019han de controlar minuciosament per reduir al m\u00e0xim la ingesta i que no ocasionin perjudicis en la salut humana.<\/p>\n<p><!--more--><\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-40753 aligncenter\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados.jpg\" alt=\"metales pesados\" width=\"1000\" height=\"630\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados.jpg 1000w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados-768x484.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados-696x438.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados-667x420.jpg 667w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>Un metall pesat, com el seu nom indica, \u00e9s un element qu\u00edmic amb un elevat pes respecte a altres metalls i tamb\u00e9 amb una alta densitat (major a 4g \/ cm3). A m\u00e9s, sempre presenta certa toxicitat per al medi ambient i per a l&#8217;\u00e9sser hum\u00e0 en concentracions baixes. Quan els prenem inconscientment amb els aliments o les aig\u00fces, s\u00f3n absorbits i posteriorment eliminats a trav\u00e9s de l&#8217;orina, sucs g\u00e0strics, etc. No obstant aix\u00f2, aquesta capacitat d&#8217;eliminaci\u00f3 \u00e9s limitada i segons la concentraci\u00f3 dels metalls pesants i del compost qu\u00edmic que els contingui, causaran un efecte t\u00f2xic a qui els consumeix.<\/p>\n<h2><strong>D&#8217;on surten aquests metalls pesants?<\/strong><\/h2>\n<p>Es troben de manera natural en l&#8217;ambient en concentracions que, en general no s\u00f3n perjudicials, per\u00f2 sobretot s\u00f3n emesos i alliberats al medi ambient a causa de <strong>l&#8217;activitat industrial i minera<\/strong>. I, encara que les emissions estan regulades i controlades, el major problema de tot aix\u00f2 \u00e9s que no poden ser degradats o destru\u00efts, de manera que romanen en l&#8217;ambient durant anys i van contaminant el s\u00f2l, acumulant-se en les plantes i en els teixits org\u00e0nics dels animals que les mengen, augmentant aix\u00ed la seva concentraci\u00f3 en els \u00e9ssers vius al llarg de la cadena aliment\u00e0ria. Per aix\u00f2, una esp\u00e8cie animal de grans dimensions, com podria ser un peix emperador o una tonyina, seran m\u00e9s susceptibles de tenir m\u00e9s quantitats de metalls pesats que no una sardina.<\/p>\n<blockquote><p>L&#8217;acumulaci\u00f3 de mercuri en l&#8217;organisme pot afectar el sistema nervi\u00f3s, digestiu, renal i causar danys en la pell i en la vista<\/p><\/blockquote>\n<h2><strong>On s\u00f3n i quins problemes de salut causen?<\/strong><\/h2>\n<p><strong>Mercuri i metilmercuri<\/strong>: es troben en peix i marisc, ja que s&#8217;acumulen en els seus teixits, sobretot en el greix. Les esp\u00e8cies m\u00e9s greixoses com el peix blau i de grans dimensions com l&#8217;emperador o la tonyina, seran els que tinguin m\u00e9s concentraci\u00f3 de mercuri o metilmercuri. L&#8217;acumulaci\u00f3 d&#8217;aquest metall pesat en l&#8217;organisme pot afectar el sistema nervi\u00f3s, digestiu, renal i causar danys en la pell i en la vista.<\/p>\n<p><strong>Plom<\/strong>: aquest metall pot estar en molts aliments i un cop ingerit s&#8217;acumula en els ossos dels animals i tamb\u00e9 del cos hum\u00e0 i la intoxicaci\u00f3 amb plom es diu saturnisme, ja que, en l&#8217;antiguitat, els alquimistes anomenaven &#8220;saturn&#8221; a aquest element qu\u00edmic. Les persones amb m\u00e9s probabilitat de patir acumulacions t\u00f2xiques de plom s\u00f3n les que treballen en la fosa de metalls, amb certes pintures, fabricaci\u00f3 de bateries, explosius, etc. Per\u00f2 el plom tamb\u00e9 est\u00e0 en els s\u00f2ls i arriba als aliments i les aig\u00fces (sobretot en cas de canonades antigues). La intoxicaci\u00f3 causa s\u00edmptomes molt diversos i en nivells elevats pot danyar els ronyons, el sistema nervi\u00f3s i la funci\u00f3 reproductiva.<\/p>\n<p><strong>Cadmi<\/strong>: present tamb\u00e9 en peix i marisc, a m\u00e9s d&#8217;en altres com carns, cereals, etc. Est\u00e0 dispers sobretot en l&#8217;aire de zones mineres passant despr\u00e9s als diferents \u00e0mbits del medi ambient. La intoxicaci\u00f3 afecta els sentits i als pulmons.<\/p>\n<p><strong>Estany<\/strong>: present sobretot en els aliments i begudes enllaunades, encara que aquests envasos porten, en l&#8217;actualitat, una laca protectora per evitar el pas de l&#8217;estany als aliments. La seva ingesti\u00f3 en dosis altes pot produir mals de panxa, an\u00e8mia, i alteracions en el fetge i els ronyons. \u00c9s molt m\u00e9s t\u00f2xic inhalat, tot i que aquesta via d&#8217;entrada a l&#8217;organisme no \u00e9s deguda als aliments.<\/p>\n<blockquote><p>La legislaci\u00f3 actual, el Reglament 1881\/2006, marca els l\u00edmits dels metalls pesants en els aliments que m\u00e9s habitualment poden contenir-los<\/p><\/blockquote>\n<h2><strong>Quins aliments els poden contenir i com es controlen a Europa?<\/strong><\/h2>\n<p>La pres\u00e8ncia de metalls pesants \u00e9s freq\u00fcent, habitual, per exemple, en hortalisses com l&#8217;enciam, col, carbassa, br\u00f2quil i patates ja que provenen del terra i del reg amb aig\u00fces que els contenen. No obstant aix\u00f2, tamb\u00e9 es poden trobar en diferents concentracions en peixos, sobretot d&#8217;esp\u00e8cies grans, carns i llet, resultat de la bioacumulaci\u00f3 o acumulaci\u00f3 en els \u00e9ssers vius.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-40756 aligncenter\" src=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados-2.jpg\" alt=\"metales pesados\" width=\"1000\" height=\"667\" srcset=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados-2.jpg 1000w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados-2-768x512.jpg 768w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados-2-696x464.jpg 696w, https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados-2-630x420.jpg 630w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>La legislaci\u00f3 actual, el Reglament 1881\/2006 (1), marca els l\u00edmits dels metalls pesants en els aliments que m\u00e9s habitualment poden contenir-los, i tamb\u00e9 defineix fins i tot els m\u00e8todes de mostreig i an\u00e0lisi per al seu control oficial. Els aliments per als quals s&#8217;han establert aquests l\u00edmits m\u00e0xims s\u00f3n:<\/p>\n<table style=\"width: 100.144%; height: 348px;\">\n<tbody>\n<tr>\n<td style=\"width: 110px;\">Plom<\/td>\n<td style=\"width: 542px;\">Llet, preparats per a lactants i preparats de continuaci\u00f3, carn, peix, crustacis, \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0mol\u00b7luscs bivalves (*), cefal\u00f2podes (*), cereals, llegums, hortalisses, fruites, greixos, olis, mantega, sucs de fruites, vi, sidra<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 110px;\">Cadmi<\/td>\n<td style=\"width: 542px;\">Carn, peix, crustacis, mol\u00b7luscs bivalves (*), cefal\u00f2podes (*), cereals, soja, hortalisses, fruites<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 110px;\">Mercurio<\/td>\n<td style=\"width: 542px;\">Peix (**)<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 110px;\">Estany<\/td>\n<td style=\"width: 542px;\">Aliments i begudes enllaunades<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>* Els mol\u00b7luscs bivalves com els musclos, les clo\u00efsses o les escopinyes, i els cefal\u00f2podes com el pop o el calamar, s\u00f3n els que tenen l\u00edmits m\u00e0xims m\u00e9s elevats de plom i de cadmi.<\/p>\n<p>** Algunes de les esp\u00e8cies que poden contenir nivells m\u00e0xims m\u00e9s elevats de mercuri s\u00f3n, entre altres, la tonyina, peix espasa, esturi\u00f3, taur\u00f3, bon\u00edtol, halibut, moll, llu\u00e7 de riu i gallineta n\u00f2rdica.<\/p>\n<p>Est\u00e0 clar que el control d&#8217;aquests metalls pesants en els aliments \u00e9s molt important, per\u00f2 tamb\u00e9 els nostres h\u00e0bits ho s\u00f3n. De manera que si volem mantenir una ingesta m\u00ednima \u00e9s bo menjar amb la m\u00e0xima varietat possible, evitant abusar de les esp\u00e8cies o aliments que poden tenir nivells m\u00e9s elevats.<\/p>\n<p>1. El Reglament 1881\/2006, de 19 de desembre de 2006 fixa el contingut m\u00e0xim de determinats contaminants en els productes alimentaris. La secci\u00f3 3 de l&#8217;annex d&#8217;aquesta normativa ens indica el contingut m\u00e0xim de cada un dels metalls pesats en mg per kg de pes fresc per a cada tipus de producte.<\/p>\n<p><span style=\"font-size: 8pt;\">Nota: aquest article est\u00e0 dirigit al consumidor i \u00e9s merament informatiu i no exhaustiu causa de l&#8217;extensi\u00f3 limitada del mateix.<\/span><\/p>\n<p><strong>Autores<\/strong>: N\u00faria Arranz, Enginyera t\u00e8cnica industrial, Tecn\u00f2loga d&#8217;aliments | Laura I. Arranz, Farmac\u00e8utica &#8211; Nutricionista<\/p>\n<p><strong><a href=\"https:\/\/www.bioecoactual.com\/ca\/subscripcio\/\" target=\"_blank\" rel=\"noopener noreferrer\">Subscriu-te<\/a> a la Newsletter i rep cada mes Bio Eco Actual gratis al teu correu<\/strong><\/p>\n<p><strong><em>Bio Eco Actual<\/em>, <em>el teu mensual 100% ecol\u00f2gic<\/em><br \/>\nLlegir <\/strong><a href=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/09\/BioEcoActual_Catala_Octubre_2020.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Bio Eco Actual Octubre 2020<\/strong><\/a><\/p>\n<p><iframe style=\"border: none; width: 100%; height: 520px;\" src=\"\/\/e.issuu.com\/embed.html?d=bioecoactual_catala_octubre_2020&amp;hideIssuuLogo=true&amp;showOtherPublicationsAsSuggestions=true&amp;u=bioecoactual\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Els metalls pesants com el plom, el mercuri, el cadmi o l&rsquo;estany s&oacute;n elements t&ograve;xics que estan en el medi ambient i passen inevitablement a la cadena aliment&agrave;ria, inclosos aliments que mengem habitualment. Per aix&ograve; s&rsquo;han de controlar minuciosament per reduir al m&agrave;xim la ingesta i que no ocasionin perjudicis en la salut humana.<\/p>\n","protected":false},"author":419,"featured_media":40753,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7176],"tags":[],"class_list":["post-40752","post","type-post","status-publish","format-standard","has-post-thumbnail","category-seguretat-alimentaria"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Metalls pesants en els aliments? - Seguretat Aliment\u00e0ria - Bio Eco Actual<\/title>\n<meta name=\"description\" content=\"Els metalls pesants com el plom, el mercuri o l&#039;estany s\u00f3n elements t\u00f2xics que estan en el medi ambient i inclosos aliments que mengem habitualment\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bioecoactual.com\/ca\/2020\/10\/04\/metalls-pesants-en-els-aliments\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Metalls pesants en els aliments?\" \/>\n<meta property=\"og:description\" content=\"Els metalls pesants com el plom, el mercuri o l&#039;estany s\u00f3n elements t\u00f2xics que estan en el medi ambient i inclosos aliments que mengem habitualment\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.bioecoactual.com\/ca\/2020\/10\/04\/metalls-pesants-en-els-aliments\/\" \/>\n<meta property=\"og:site_name\" content=\"Bio Eco Actual\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/BioEcoActual\/\" \/>\n<meta property=\"article:published_time\" content=\"2020-10-04T07:00:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.bioecoactual.com\/wp-content\/uploads\/2020\/10\/metales-pesados.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Bio Eco Actual\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@bioecoactual\" \/>\n<meta name=\"twitter:site\" content=\"@bioecoactual\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bio Eco Actual\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.bioecoactual.com\\\/ca\\\/2020\\\/10\\\/04\\\/metalls-pesants-en-els-aliments\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.bioecoactual.com\\\/ca\\\/2020\\\/10\\\/04\\\/metalls-pesants-en-els-aliments\\\/\"},\"author\":{\"name\":\"Bio Eco Actual\",\"@id\":\"https:\\\/\\\/www.bioecoactual.com\\\/#\\\/schema\\\/person\\\/43c1f0817cbc73f37ce66f2978084ceb\"},\"headline\":\"Metalls pesants en els aliments?\",\"datePublished\":\"2020-10-04T07:00:45+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.bioecoactual.com\\\/ca\\\/2020\\\/10\\\/04\\\/metalls-pesants-en-els-aliments\\\/\"},\"wordCount\":1132,\"publisher\":{\"@id\":\"https:\\\/\\\/www.bioecoactual.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.bioecoactual.com\\\/ca\\\/2020\\\/10\\\/04\\\/metalls-pesants-en-els-aliments\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.bioecoactual.com\\\/wp-content\\\/uploads\\\/2020\\\/10\\\/metales-pesados.jpg\",\"articleSection\":[\"Seguretat Aliment\u00e0ria\"],\"inLanguage\":\"ca-ES\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.bioecoactual.com\\\/ca\\\/2020\\\/10\\\/04\\\/metalls-pesants-en-els-aliments\\\/\",\"url\":\"https:\\\/\\\/www.bioecoactual.com\\\/ca\\\/2020\\\/10\\\/04\\\/metalls-pesants-en-els-aliments\\\/\",\"name\":\"Metalls pesants en els aliments? 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