{"id":4727,"date":"2015-11-16T00:01:08","date_gmt":"2015-11-16T03:01:08","guid":{"rendered":"http:\/\/quiprocura.net\/w\/?p=4727"},"modified":"2017-03-21T10:07:48","modified_gmt":"2017-03-21T13:07:48","slug":"manganes-aplicacoes-e-envolvimento-com-a-saude","status":"publish","type":"post","link":"https:\/\/quiprocura.net\/w\/2015\/11\/16\/manganes-aplicacoes-e-envolvimento-com-a-saude\/","title":{"rendered":"Mangan\u00eas &#8211; Aplica\u00e7\u00f5es e Envolvimento com a sa\u00fade"},"content":{"rendered":"<div  class='avia-builder-widget-area clearfix  avia-builder-el-0  el_before_av_social_share  avia-builder-el-first '><div id=\"text-35\" class=\"widget clearfix widget_text\">\t\t\t<div class=\"textwidget\"><h3>QuiProcura Qu\u00edmica<\/h3>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-5517334625230773\"\n     crossorigin=\"anonymous\"><\/script><br \/>\n<!-- anuncio superior --><br \/>\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:728px;height:90px\"\n     data-ad-client=\"ca-pub-5517334625230773\"\n     data-ad-slot=\"3817602043\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<\/div>\n\t\t<\/div><\/div>\n<div  class='av-social-sharing-box  avia-builder-el-1  el_after_av_sidebar  el_before_av_two_third  av-social-sharing-box-minimal '><div class='av-share-box'><ul class='av-share-box-list noLightbox'><li class='av-share-link av-social-link-facebook' ><a target=\"_blank\" aria-label=\"Share on Facebook\" href='https:\/\/www.facebook.com\/sharer.php?u=https:\/\/quiprocura.net\/w\/2015\/11\/16\/manganes-aplicacoes-e-envolvimento-com-a-saude\/&#038;t=Mangan%C3%AAs%20%E2%80%93%20Aplica%C3%A7%C3%B5es%20e%20Envolvimento%20com%20a%20sa%C3%BAde' aria-hidden='false' data-av_icon='\ue8f3' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on Facebook' rel=\"noopener\"><span class='avia_hidden_link_text'>Share on Facebook<\/span><\/a><\/li><li class='av-share-link av-social-link-twitter' ><a target=\"_blank\" aria-label=\"Share on Twitter\" href='https:\/\/twitter.com\/share?text=Mangan%C3%AAs%20%E2%80%93%20Aplica%C3%A7%C3%B5es%20e%20Envolvimento%20com%20a%20sa%C3%BAde&#038;url=https:\/\/quiprocura.net\/w\/?p=4727' aria-hidden='false' data-av_icon='\ue8f1' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on Twitter' rel=\"noopener\"><span class='avia_hidden_link_text'>Share on Twitter<\/span><\/a><\/li><li class='av-share-link av-social-link-whatsapp' ><a target=\"_blank\" aria-label=\"Share on WhatsApp\" href='https:\/\/api.whatsapp.com\/send?text=https:\/\/quiprocura.net\/w\/2015\/11\/16\/manganes-aplicacoes-e-envolvimento-com-a-saude\/' aria-hidden='false' data-av_icon='\uf232' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on WhatsApp' rel=\"noopener\"><span class='avia_hidden_link_text'>Share on WhatsApp<\/span><\/a><\/li><li class='av-share-link av-social-link-tumblr' ><a target=\"_blank\" aria-label=\"Share on Tumblr\" href='https:\/\/www.tumblr.com\/share\/link?url=https%3A%2F%2Fquiprocura.net%2Fw%2F2015%2F11%2F16%2Fmanganes-aplicacoes-e-envolvimento-com-a-saude%2F&#038;name=Mangan%C3%AAs%20%E2%80%93%20Aplica%C3%A7%C3%B5es%20e%20Envolvimento%20com%20a%20sa%C3%BAde&#038;description=' aria-hidden='false' data-av_icon='\ue8fa' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on Tumblr' rel=\"noopener\"><span class='avia_hidden_link_text'>Share on Tumblr<\/span><\/a><\/li><li class='av-share-link av-social-link-mail' ><a  aria-label=\"Share by Mail\" href='mailto:?subject=Mangan%C3%AAs%20%E2%80%93%20Aplica%C3%A7%C3%B5es%20e%20Envolvimento%20com%20a%20sa%C3%BAde&#038;body=https:\/\/quiprocura.net\/w\/2015\/11\/16\/manganes-aplicacoes-e-envolvimento-com-a-saude\/' aria-hidden='false' data-av_icon='\ue805' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share by Mail'><span class='avia_hidden_link_text'>Share by Mail<\/span><\/a><\/li><\/ul><\/div><\/div>\n<div class=\"flex_column av_two_third  flex_column_div av-zero-column-padding first  avia-builder-el-2  el_after_av_social_share  el_before_av_one_third  \" style='border-radius:0px; '><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><h1>Mangan\u00eas &#8211; Aplica\u00e7\u00f5es e Envolvimento com a sa\u00fade<\/h1>\n<p>O <strong>mangan\u00eas (Mn)<\/strong> \u00e9 um metal cinza prateado, que se assemelha ao <a href=\"http:\/\/quiprocura.net\/w\/portfolio-item\/ferro-do-ceu-ao-centro-da-terra-o-metal-mais-utilizado-pelo-homem\/\" target=\"_blank\">ferro<\/a>, visualmente. No entanto, o mangan\u00eas \u00e9 um metal bastante duro, com temperatura de fus\u00e3o elevada (1246\u00b0C), e bastante fr\u00e1gil (<a href=\"http:\/\/quiprocura.net\/w\/portfolio-item\/diamantes\/\" target=\"_blank\">lembre-se, dureza n\u00e3o quer dizer resist\u00eancia mec\u00e2nica<\/a>). Este metal \u00e9 relativamente f\u00e1cil de oxidar, n\u00e3o sendo encontrado isolado na natureza. Quando puro, o <strong>mangan\u00eas<\/strong> met\u00e1lico tende a reagir facilmente com o <a href=\"http:\/\/quiprocura.net\/w\/portfolio-item\/oxigenio-e-ar\/\" target=\"_blank\">oxig\u00eanio do ar<\/a>, principalmente se estiver na forma de p\u00f3 ou finas part\u00edculas.<\/p>\n<p>O <strong>mangan\u00eas<\/strong> \u00e9 o 12\u00b0 elemento mais abundante da crosta terrestre, apresentando import\u00e2ncia em baixas concentra\u00e7\u00f5es, para as formas de vida do planeta, sendo encontrado n\u00e3o apenas no solo, como tamb\u00e9m nos rios e oceanos.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"576\">Como elemento qu\u00edmico, ele apresenta n\u00famero at\u00f4mico 25, est\u00e1 localizado no grupo VIIB da Tabela peri\u00f3dica, ao lado do ferro. A densidade do mangan\u00eas met\u00e1lico \u00e9 7,43g\/cm<sup>3<\/sup>, temperatura de fus\u00e3o \u00e9 1246\u00b0C e temperatura de ebuli\u00e7\u00e3o \u00e9 2061\u00b0C.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Apenas em 1774 \u00e9 que o mangan\u00eas foi isolado como metal puro por Johan Gottlieb Gahn, um colaborador de <a href=\"http:\/\/www.quiprocura.net\/biografias\/scheele.htm\" target=\"_blank\" rel=\"noopener\">Carl W. Scheele<\/a>, que estudava compostos de mangan\u00eas para produzir <a href=\"http:\/\/quiprocura.net\/w\/portfolio-item\/cloro\/\" target=\"_blank\">cloro<\/a>. No entanto, compostos de mangan\u00eas s\u00e3o utilizados desde a pr\u00e9 hist\u00f3ria, h\u00e1 pelo menos 17 mil anos atr\u00e1s, quando o homem usava di\u00f3xido de mangan\u00eas como pigmento para pinturas rupestres. \u00c9 comum a explora\u00e7\u00e3o de ferro estar associada a mangan\u00eas, que \u00e9 considerada uma \u201ccontamina\u00e7\u00e3o\u201d do min\u00e9rio de ferro, mas isso se deve \u00e0 ocorr\u00eancia simult\u00e2nea dos dois elementos, em alguns casos. E esse fato foi explorado inconscientemente pelos espartanos (da Gr\u00e9cia antiga), pois suas armas de a\u00e7o eram mais resistentes que de outros povos (era formada uma liga resistente de ferro, mangan\u00eas e carbono).<\/p>\n<p>O grande consumo de <strong>mangan\u00eas<\/strong>, atualmente, se d\u00e1 pela ind\u00fastria sider\u00fargica (ind\u00fastria que produz a\u00e7o), que absorve at\u00e9 90% de toda a produ\u00e7\u00e3o do metal. As ligas met\u00e1licas obtidas com mangan\u00eas tendem a apresentar maior resist\u00eancia mec\u00e2nica, dureza, rigidez e resist\u00eancia ao desgaste. Ligas de a\u00e7o e mangan\u00eas s\u00e3o t\u00e3o resistentes que s\u00e3o usadas em trituradores, mand\u00edbulas para cortar a\u00e7o e trilhos ferrovi\u00e1rios. O mangan\u00eas tamb\u00e9m \u00e9 capaz de fazer ligas com outros metais e oferecer maior resist\u00eancia quando comparado ao metal puro, como ocorre em ligas com <a href=\"http:\/\/quiprocura.net\/w\/2015\/07\/13\/cozinhar-em-panelas-de-aluminio-e-um-problema\/\" target=\"_blank\">alum\u00ednio<\/a>. A liga met\u00e1lica entre mangan\u00eas e alum\u00ednio apresenta elevada resist\u00eancia \u00e0 <a href=\"http:\/\/quiprocura.net\/w\/2015\/06\/28\/corrosao\/\" target=\"_blank\">corros\u00e3o<\/a>, sendo usada para fabrica\u00e7\u00e3o de utens\u00edlios de cozinha, latas de bebidas e radiadores automotivos, que s\u00e3o objetos expostos \u00e0 atmosfera oxidante.<\/p>\n<p>O di\u00f3xido de mangan\u00eas (MnO<sub>2<\/sub>), um \u00f3xido de mangan\u00eas \u00e9 utilizado na fabrica\u00e7\u00e3o de pilhas e baterias comerciais, que usam o <a href=\"http:\/\/quiprocura.net\/w\/2015\/06\/28\/eletroquimica\/\" target=\"_blank\">principio eletroqu\u00edmico<\/a> da rea\u00e7\u00e3o entre zinco e di\u00f3xido de mangan\u00eas (Zn\/ MnO<sub>2<\/sub>). Al\u00e9m disso, o MnO<sub>2<\/sub> \u00e9 utilizado como <a href=\"http:\/\/quiprocura.net\/w\/2015\/08\/10\/cinetica-quimica\/\" target=\"_blank\">catalisador<\/a>\u00a0de produto aliment\u00edcios, na produ\u00e7\u00e3o industrial de g\u00e1s oxig\u00eanio e g\u00e1s cloro e\u00a0 como colorante de <a href=\"http:\/\/quiprocura.net\/w\/2015\/07\/20\/vidro-como-e-feito\/\">vidros <\/a>e cer\u00e2micas.<\/p>\n<p>O permanganato de pot\u00e1ssio (KMnO<sub>4<\/sub>) \u00e9 outro importante composto de mangan\u00eas, que \u00e9 um forte agente oxidante, utilizado em aplica\u00e7\u00f5es farmacol\u00f3gicas, an\u00e1lises qu\u00edmicas e desinfetante em casos de doen\u00e7as de pele. H\u00e1 tamb\u00e9m o sulfato de mangan\u00eas, que \u00e9 utilizado como fertilizante e em ra\u00e7\u00f5es animais.<\/p>\n<p><strong>Envolvimento com a sa\u00fade<\/strong><\/p>\n<p>No corpo humano h\u00e1 poucos miligramas de mangan\u00eas, sendo encontrado principalmente no f\u00edgado, ossos e rins. O mangan\u00eas \u00e9 considerado um oligoelemento, que \u00e9 essencial para o funcionamento de algumas <a href=\"http:\/\/quiprocura.net\/w\/portfolio-item\/proteinas\/\" target=\"_blank\">enzimas<\/a>. O teor correto de mangan\u00eas permite: (i) crescimento e desenvolvimento \u00f3sseo normal; (ii) s\u00edntese e <a href=\"http:\/\/quiprocura.net\/w\/2015\/07\/08\/metabolismo-precisamos-de-energia\/\" target=\"_blank\">metabolismo <\/a>de lip\u00eddeos; (iii) metabolismo do colesterol; (iv) metabolismo de prote\u00ednas e \u00e1cidos nucleicos; (v) atua na s\u00edntese de horm\u00f4nios da tireoide; (vi) ativa fun\u00e7\u00f5es enzim\u00e1ticas, entre outras fun\u00e7\u00f5es.<\/p>\n<p>O excesso de mangan\u00eas no organismo n\u00e3o faz bem, podendo causar alguns problemas de sa\u00fade, tais como: (i) problemas neurol\u00f3gicos; (ii) confus\u00e3o mental; (iii) espasmos musculares; (iv) redu\u00e7\u00e3o da imunidade; (v) perda de apetite e outros.<\/p>\n<p><b>Escrito por:<\/b> <span style=\"color: #000080;\"><a style=\"color: #000080;\" href=\"http:\/\/quiprocura.net\/w\/author\/miguel-medeiros\/\" target=\"_blank\">Miguel A. Medeiros<\/a><\/span><br \/>\n<b>Publicado em:<\/b>\u00a016 de novembro\u00a0de 2015<br \/>\n<b><\/b><\/p>\n<\/div><\/section><\/div><div class=\"flex_column av_one_third  flex_column_div av-zero-column-padding   avia-builder-el-4  el_after_av_two_third  avia-builder-el-last  \" style='border-radius:0px; '><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":5816,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[568,202,216,506,569,566,222,567,11],"class_list":["post-4727","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-curiosidades-quimicas-na-web","tag-contaminante","tag-elemento-quimico","tag-elementos-quimicos","tag-ensino-medio","tag-lama","tag-manganes","tag-metal","tag-mn","tag-quimica"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mangan\u00eas - Aplica\u00e7\u00f5es e Envolvimento com a sa\u00fade - QuiProcura<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/quiprocura.net\/w\/2015\/11\/16\/manganes-aplicacoes-e-envolvimento-com-a-saude\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mangan\u00eas - Aplica\u00e7\u00f5es e Envolvimento com a sa\u00fade - QuiProcura\" \/>\n<meta property=\"og:url\" content=\"https:\/\/quiprocura.net\/w\/2015\/11\/16\/manganes-aplicacoes-e-envolvimento-com-a-saude\/\" \/>\n<meta property=\"og:site_name\" content=\"QuiProcura\" \/>\n<meta property=\"article:published_time\" content=\"2015-11-16T03:01:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-03-21T13:07:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/quiprocura.net\/w\/wp-content\/uploads\/2017\/03\/icone-quiprocura.gif\" \/>\n\t<meta property=\"og:image:width\" content=\"63\" \/>\n\t<meta property=\"og:image:height\" content=\"63\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/gif\" \/>\n<meta name=\"author\" content=\"Miguel\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Miguel\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/quiprocura.net\/w\/2015\/11\/16\/manganes-aplicacoes-e-envolvimento-com-a-saude\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/quiprocura.net\/w\/2015\/11\/16\/manganes-aplicacoes-e-envolvimento-com-a-saude\/\"},\"author\":{\"name\":\"Miguel\",\"@id\":\"https:\/\/quiprocura.net\/w\/#\/schema\/person\/5f45798853889ca34a52bdd0208e9434\"},\"headline\":\"Mangan\u00eas &#8211; 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