{"id":23593,"date":"2025-05-28T11:20:36","date_gmt":"2025-05-28T10:20:36","guid":{"rendered":"https:\/\/sgciafrica.org\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\/"},"modified":"2026-02-13T13:35:11","modified_gmt":"2026-02-13T13:35:11","slug":"solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana","status":"publish","type":"post","link":"https:\/\/sgciafrica.org\/pt\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\/","title":{"rendered":"Solu\u00e7\u00e3o \u00e0 base de areia poder\u00e1 reduzir custos de minera\u00e7\u00e3o no Botsuana"},"content":{"rendered":"\n

[MAUN, BOTSUANA] Investigadores no Botsuana converteram areia comum em produtos qu\u00edmicos especializados para minera\u00e7\u00e3o que poder\u00e3o reduzir em um ter\u00e7o os custos operacionais de minera\u00e7\u00e3o do pa\u00eds, pondo fim \u00e0 sua depend\u00eancia de qu\u00edmicos importados.<\/p>\n\n

Cientistas da Botswana International University of Science and Technology (BIUST)<\/a> desenvolveram um composto qu\u00edmico para extra\u00e7\u00e3o mineral utilizando areia de origem local \u2014 uma inova\u00e7\u00e3o que, segundo afirmam, j\u00e1 suscitou o interesse de empresas de minera\u00e7\u00e3o interessadas em testar a inova\u00e7\u00e3o em projeto-piloto.<\/p>\n\n

Atualmente, o Botsuana importa 100% dos seus qu\u00edmicos para minera\u00e7\u00e3o da China, da \u00c1frica do Sul e dos Estados Unidos, criando depend\u00eancias dispendiosas e vulnerabilidades na cadeia de abastecimento.<\/p>\n\n

Da areia ao qu\u00edmico<\/strong><\/h2>\n\n

O projeto de tr\u00eas anos, que decorreu entre 2021 e 2023, foi financiado pela Iniciativa dos Conselhos Concedentes de Ci\u00eancia e pelo Minist\u00e9rio do Ensino Superior, Investiga\u00e7\u00e3o, Ci\u00eancia e Tecnologia, em colabora\u00e7\u00e3o com a Midlands State University do Zimbabu\u00e9.<\/p>\n\n

O investigador principal, Gwiranai Danha, professor no Departamento de Engenharia Qu\u00edmica, de Materiais e Metal\u00fargica da BIUST, explica que o processo \u00e9 semelhante a fazer gelatina a partir de uma mistura de areia e um agente espessante.<\/p>\n\n

A equipa utiliza areia local num processo denominado s\u00edntese sol-gel, no qual part\u00edculas min\u00fasculas s\u00e3o transformadas em gel para produzir qu\u00edmicos que extraem metais valiosos de min\u00e9rios.<\/p>\n\n

\u201cGradualmente, este l\u00edquido engrossa e forma um material semelhante a gel que, depois de solidificar, cria part\u00edculas min\u00fasculas chamadas nanopart\u00edculas\u201d, explicou Danha.<\/p>\n\n

\u201cAs nanopart\u00edculas s\u00e3o ainda modificadas para melhorar as suas propriedades para aplica\u00e7\u00f5es espec\u00edficas no processamento de minerais. O resultado \u00e9 um material inovador e \u00fanico que pode melhorar significativamente a efici\u00eancia e a sustentabilidade da ind\u00fastria mineira no Botsuana.\u201d<\/p>\n\n

Benef\u00edcios ambientais<\/strong><\/h2>\n\n

Testes preliminares mostram que os qu\u00edmicos produzidos localmente proporcionam uma maior efici\u00eancia na recupera\u00e7\u00e3o de metais, ao mesmo tempo que reduzem significativamente as emiss\u00f5es ambientais e alcan\u00e7am maiores rendimentos de recupera\u00e7\u00e3o.<\/p>\n\n

Danha afirmou existir \u201cuma redu\u00e7\u00e3o significativa das emiss\u00f5es ambientais e maiores rendimentos de recupera\u00e7\u00e3o, o que se traduz diretamente num aumento da rentabilidade.\u201d<\/p>\n\n

\u201cO projeto aborda a degrada\u00e7\u00e3o ambiental ao eliminar produtos de res\u00edduos perigosos, reduzindo a lixivia\u00e7\u00e3o de qu\u00edmicos para o solo e para os corpos de \u00e1gua, al\u00e9m de melhorar a efici\u00eancia dos recursos e reduzir a necessidade de m\u00e9todos de extra\u00e7\u00e3o agressivos\u201d, afirmou.<\/p>\n\n

Os benef\u00edcios ambientais v\u00e3o al\u00e9m da redu\u00e7\u00e3o de res\u00edduos. A utiliza\u00e7\u00e3o de materiais locais requer menos energia e reduz a pegada de carbono das opera\u00e7\u00f5es de processamento de minerais. <\/p>\n\n

Positivo<\/strong><\/h2>\n\n

A resposta do setor mineiro tem sido positiva, disse Danha.<\/p>\n\n

\u201cV\u00e1rias empresas de minera\u00e7\u00e3o j\u00e1 manifestaram interesse em testes-piloto.\u201d<\/p>\n\n

James Othapile, <\/a>engenheiro qu\u00edmico do Botsuana e membro (Fellow) da Institution of Chemical Engineers, sediada no Reino Unido, elogiou o potencial do projeto para impulsionar o crescimento do panorama mineiro no Botsuana atrav\u00e9s da otimiza\u00e7\u00e3o de lucros e da cria\u00e7\u00e3o de emprego.<\/p>\n\n

Afirmou que a utiliza\u00e7\u00e3o de mat\u00e9rias-primas locais aumentar\u00e1 o Produto Interno Bruto do pa\u00eds, ao mesmo tempo que reduz o impacto ambiental.<\/p>\n\n

No entanto, Othapile afirma ser necess\u00e1ria uma implementa\u00e7\u00e3o comercial cuidadosa, aconselhando os investigadores a estabelecer parcerias com especialistas em engenharia, aprovisionamento, constru\u00e7\u00e3o e gest\u00e3o para conceber e otimizar unidades metal\u00fargicas.<\/p>\n\n

\u201cOs testes comerciais teriam de ser realizados em ambientes de unidades em funcionamento, com elevados riscos de seguran\u00e7a, sa\u00fade, ambientais e financeiros a ter em conta\u201d, explicou, sublinhando a import\u00e2ncia de um plano de neg\u00f3cio robusto e de um plano de testes com riscos mitigados.<\/p>\n\n

Para al\u00e9m da minera\u00e7\u00e3o<\/strong><\/h2>\n\n

Danha v\u00ea a inova\u00e7\u00e3o como um modelo replic\u00e1vel para na\u00e7\u00f5es ricas em recursos, mas ambientalmente sens\u00edveis.<\/p>\n\n

\u201cO projeto tamb\u00e9m demonstra como uma inova\u00e7\u00e3o sustent\u00e1vel, liderada localmente, pode impulsionar a transforma\u00e7\u00e3o industrial, preservando simultaneamente os ecossistemas naturais\u201d, afirmou.<\/p>\n\n

Acrescenta que a inova\u00e7\u00e3o \u00e9 \u201caltamente escal\u00e1vel e adapt\u00e1vel para tratamento de \u00e1gua no setor agr\u00edcola, como nano-fertilizantes, e para o fabrico de materiais avan\u00e7ados em setores como a eletr\u00f3nica e a energia\u201d.<\/p>\n\n

Danha acrescenta que a inova\u00e7\u00e3o representa um modelo para o desenvolvimento industrial sustent\u00e1vel que outras na\u00e7\u00f5es africanas poder\u00e3o replicar.<\/p>\n\n

Este artigo foi escrito por: Baboki Kayawe<\/em><\/strong> | 27 de maio de 2025<\/p>\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

[MAUN, BOTSUANA] Investigadores no Botsuana converteram areia comum em produtos qu\u00edmicos especializados para minera\u00e7\u00e3o que poder\u00e3o reduzir em um ter\u00e7o os custos operacionais de minera\u00e7\u00e3o do pa\u00eds, pondo fim \u00e0 sua depend\u00eancia de qu\u00edmicos importados. Cientistas da Botswana International University of Science and Technology (BIUST) desenvolveram um composto qu\u00edmico para extra\u00e7\u00e3o mineral utilizando areia de…<\/p>\n","protected":false},"author":13,"featured_media":23505,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","wds_primary_category":0,"wds_primary_country":0,"wds_primary_objective":0,"wds_primary_sg_theme":0,"footnotes":""},"categories":[159],"tags":[392],"country":[],"objective":[],"sg_theme":[],"class_list":["post-23593","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticias","tag-botsuana"],"acf":[],"yoast_head":"\nSolu\u00e7\u00e3o \u00e0 base de areia poder\u00e1 reduzir custos de minera\u00e7\u00e3o no Botsuana - SGCI Africa<\/title>\n<meta name=\"description\" content=\"Investigadores desenvolvem tecnologia \u00e0 base de areia para reduzir a depend\u00eancia de importa\u00e7\u00f5es e diminuir os custos de minera\u00e7\u00e3o no Botsuana atrav\u00e9s de solu\u00e7\u00f5es locais de processamento de minerais.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sgciafrica.org\/pt\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Solu\u00e7\u00e3o \u00e0 base de areia poder\u00e1 reduzir custos de minera\u00e7\u00e3o no Botsuana\" \/>\n<meta property=\"og:description\" content=\"Investigadores desenvolvem tecnologia \u00e0 base de areia para reduzir a depend\u00eancia de importa\u00e7\u00f5es e diminuir os custos de minera\u00e7\u00e3o no Botsuana atrav\u00e9s de solu\u00e7\u00f5es locais de processamento de minerais.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sgciafrica.org\/pt\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\/\" \/>\n<meta property=\"og:site_name\" content=\"SGCI Africa\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-28T10:20:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-13T13:35:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sgciafrica.org\/wp-content\/uploads\/2025\/05\/excavation_BODY.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"996\" \/>\n\t<meta property=\"og:image:height\" content=\"567\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Davis Weddi\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SGCIAfrica\" \/>\n<meta name=\"twitter:site\" content=\"@SGCIAfrica\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Davis Weddi\" \/>\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:\\\/\\\/sgciafrica.org\\\/pt\\\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/sgciafrica.org\\\/pt\\\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\\\/\"},\"author\":{\"name\":\"Davis Weddi\",\"@id\":\"https:\\\/\\\/sgciafrica.org\\\/#\\\/schema\\\/person\\\/428f9ad4d83bdadcb2d6d2110d2fcf92\"},\"headline\":\"Solu\u00e7\u00e3o \u00e0 base de areia poder\u00e1 reduzir custos de minera\u00e7\u00e3o no Botsuana\",\"datePublished\":\"2025-05-28T10:20:36+00:00\",\"dateModified\":\"2026-02-13T13:35:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/sgciafrica.org\\\/pt\\\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\\\/\"},\"wordCount\":774,\"publisher\":{\"@id\":\"https:\\\/\\\/sgciafrica.org\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/sgciafrica.org\\\/pt\\\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/sgciafrica.org\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/excavation_BODY.jpg\",\"keywords\":[\"Botsuana\"],\"articleSection\":[\"Not\u00edcias\"],\"inLanguage\":\"pt-BR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/sgciafrica.org\\\/pt\\\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\\\/\",\"url\":\"https:\\\/\\\/sgciafrica.org\\\/pt\\\/solucao-de-areia-pode-reduzir-o-custo-das-minas-no-botswana\\\/\",\"name\":\"Solu\u00e7\u00e3o \u00e0 base de areia poder\u00e1 reduzir custos de minera\u00e7\u00e3o no Botsuana - 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