{"id":300,"date":"2025-08-26T11:02:52","date_gmt":"2025-08-26T09:02:52","guid":{"rendered":"https:\/\/sites.unica.it\/superfici\/?page_id=300"},"modified":"2025-08-26T11:02:52","modified_gmt":"2025-08-26T09:02:52","slug":"manganese-removal-by-marble-waste-mechanism-by-xps","status":"publish","type":"page","link":"https:\/\/sites.unica.it\/superfici\/manganese-removal-by-marble-waste-mechanism-by-xps\/","title":{"rendered":"Manganese removal by marble waste &#8211; mechanism by XPS"},"content":{"rendered":"\n<p>Powdered marble waste (MW) resulting from\u00a0cutting processes\u00a0in the Orosei marble district is tested as\u00a0sorbent\u00a0for toxic elements from wastewater in compliance with the European\u00a0circular economy\u00a0strategy. MW consists of a\u00a0calcite\u00a0polymorph of CaCO<sub>3<\/sub>\u00a0with a Mg content of about 0.28\u00a0wt%. This article focuses on surface analysis by X-ray\u00a0photoelectron spectroscopy\u00a0(XPS) of MW used as\u00a0sorbent, combined with solution analysis by inductively coupled plasma\u00a0atomic emission spectroscopy\u00a0(ICP-AES). The goal is to distinguish between different removal mechanisms of Pb<sup>2+<\/sup>\u00a0and Mn<sup>2+<\/sup>\u00a0from model solutions over a wide concentration range, from 0.1\u00a0\u03bcM to 100\u00a0mM.<\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"772\" src=\"https:\/\/sites.unica.it\/superfici\/files\/2025\/08\/Pb_Mn_removal-1024x772.jpg\" alt=\"\" class=\"wp-image-301 size-full\" srcset=\"https:\/\/sites.unica.it\/superfici\/files\/2025\/08\/Pb_Mn_removal-1024x772.jpg 1024w, https:\/\/sites.unica.it\/superfici\/files\/2025\/08\/Pb_Mn_removal-300x226.jpg 300w, https:\/\/sites.unica.it\/superfici\/files\/2025\/08\/Pb_Mn_removal-768x579.jpg 768w, https:\/\/sites.unica.it\/superfici\/files\/2025\/08\/Pb_Mn_removal-1536x1157.jpg 1536w, https:\/\/sites.unica.it\/superfici\/files\/2025\/08\/Pb_Mn_removal.jpg 1716w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p>Surface lead, manganese and calcium concentrations (at%) from\u00a0XPS\u00a0data, following lead and manganese\u00a0<a href=\"https:\/\/www.sciencedirect.com\/topics\/chemical-engineering\/sorption\">s<\/a>orption\u00a0tests.<\/p>\n<\/div><\/div>\n\n\n\n<p>The results showed a removal efficiency (RE) of about 100% for Pb, independent of the initial concentration, and up to about 100% for manganese, providing its initial concentration is lower than 0.1\u00a0mM. These findings help in the development of remedial processes and analytical strategies for\u00a0water remediation.<\/p>\n\n\n\n<p><strong>Publication<\/strong>: E. Fiorito,\u00a0M. Fantauzzi,\u00a0L. Brundu,\u00a0D. Atzei,\u00a0B. Elsener,\u00a0A. Rossi, Spectroscopic evidence for clarifying the mechanism of toxic element removal by marble waste, Vacuum 196 (2022) 110721 doi: <a href=\"https:\/\/doi.org\/10.1016\/j.vacuum.2021.110721\">10.1016\/j.vacuum.2021.110721<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Powdered marble waste (MW) resulting from\u00a0cutting processes\u00a0in the Orosei marble district is tested as\u00a0sorbent\u00a0for toxic elements from wastewater in compliance with the European\u00a0circular economy\u00a0strategy. MW consists of a\u00a0calcite\u00a0polymorph of CaCO3\u00a0with a Mg content of about 0.28\u00a0wt%. [&hellip;]<\/p>\n","protected":false},"author":335,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-300","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/sites.unica.it\/superfici\/wp-json\/wp\/v2\/pages\/300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.unica.it\/superfici\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.unica.it\/superfici\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.unica.it\/superfici\/wp-json\/wp\/v2\/users\/335"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.unica.it\/superfici\/wp-json\/wp\/v2\/comments?post=300"}],"version-history":[{"count":1,"href":"https:\/\/sites.unica.it\/superfici\/wp-json\/wp\/v2\/pages\/300\/revisions"}],"predecessor-version":[{"id":302,"href":"https:\/\/sites.unica.it\/superfici\/wp-json\/wp\/v2\/pages\/300\/revisions\/302"}],"wp:attachment":[{"href":"https:\/\/sites.unica.it\/superfici\/wp-json\/wp\/v2\/media?parent=300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}