{"id":20661,"date":"2019-12-05T13:10:16","date_gmt":"2019-12-05T13:10:16","guid":{"rendered":"https:\/\/services.jacobi.net\/chromium-removal-from-water-with-ion-exchange-resins\/"},"modified":"2025-06-05T10:38:53","modified_gmt":"2025-06-05T10:38:53","slug":"rimozione-del-cromo-dall-acqua-con-resine-a-scambio-ionico","status":"publish","type":"post","link":"https:\/\/services.jacobi.net\/it\/rimozione-del-cromo-dall-acqua-con-resine-a-scambio-ionico\/","title":{"rendered":"Rimozione del cromo dall&#8217;acqua."},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"20661\" class=\"elementor elementor-20661\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1bb17eba e-flex e-con-boxed e-con e-parent\" data-id=\"1bb17eba\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2332d04b elementor-widget elementor-widget-text-editor\" data-id=\"2332d04b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3><\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-65718b71 e-flex e-con-boxed e-con e-parent\" data-id=\"65718b71\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-27f95c22 elementor-widget elementor-widget-text-editor\" data-id=\"27f95c22\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Da dove viene il cromo?<\/h3><p>Il cromo, che \u00e8 uniformemente distribuito nella crosta terrestre, \u00e8 ottenuto dai minerali di cromite, o ossido di cromo di ferro (FeCr\u2082O\u2084). Il cromo esavalente (Cr\u02c5\u02e1\u207a) \u00e8 molto tossico e ha effetti mutageni e cancerogeni, in contrasto con il cromo elementare trivalente (Cr\u02e1\u02e1\u02e1\u207a) che \u00e8 un nutriente essenziale.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-57a9912e e-flex e-con-boxed e-con e-parent\" data-id=\"57a9912e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-18124061 elementor-widget elementor-widget-text-editor\" data-id=\"18124061\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><em>Figura 1: Minerale di cromo<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b21d637 elementor-widget elementor-widget-image\" data-id=\"7b21d637\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"428\" height=\"408\" src=\"https:\/\/services.jacobi.net\/wp-content\/uploads\/2021\/06\/Chromite-Ore.png\" class=\"attachment-large size-large wp-image-39214\" alt=\"\" srcset=\"https:\/\/services.jacobi.net\/wp-content\/uploads\/2021\/06\/Chromite-Ore.png 428w, https:\/\/services.jacobi.net\/wp-content\/uploads\/2021\/06\/Chromite-Ore-300x286.png 300w\" sizes=\"(max-width: 428px) 100vw, 428px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-50dc1938 e-flex e-con-boxed e-con e-parent\" data-id=\"50dc1938\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-44f4ce71 elementor-widget elementor-widget-text-editor\" data-id=\"44f4ce71\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Il cromo \u00e8 stato ampiamente utilizzato per molti anni in vari processi industriali come inibitore di corrosione, pigmento e fissatore di colore (Ad es. nelle torri di raffreddamento, nella galvanoplastica e nell\u2019industria tessile). L\u2019uso di composti a base di cromo sta diminuendo drasticamente per i rischi per la salute umana e ambientale. La concentrazione di cromo nelle acque sotterranee in aree contaminate potrebbe essere superiore alle linee guida dell\u2019Organizzazione Mondiale della Sanit\u00e0 (OMS) di 50 \u00b5g\/l.<\/p><p>Il diagramma di Pourbaix o il diagramma di potenziale\/pH del cromo nella Figura 2 mostra la speciazione del cromo nell\u2019acqua. L\u2019area tra le linee tratteggiate arancioni rappresenta la zona di stabilit\u00e0 dell\u2019acqua. La Figura 1 mostra che la speciazione del cromo in acqua \u00e8 dominata dal cromato (CrO\u2084\u00b2\u00af), dai bicromati (Cr\u2082O\u2087\u00b2\u00af) e dal cromo elementare trivalente (Cr\u00b3\u207a). Il cromato (CrO\u2084\u00b2\u00af) ed il bicromato (Cr\u2082O\u2087\u00b2\u00af) sono ossiani del cromato esavalente (Cr\u02c5\u02e1\u207a).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-78228eee e-flex e-con-boxed e-con e-parent\" data-id=\"78228eee\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-10c2167c elementor-widget elementor-widget-text-editor\" data-id=\"10c2167c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><em>Figura 2 Diagramma di Pourbaix o diagramma di potenziale\/pH delle specie di cromo<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1b5efbd6 elementor-widget elementor-widget-image\" data-id=\"1b5efbd6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"682\" height=\"447\" src=\"https:\/\/services.jacobi.net\/wp-content\/uploads\/2021\/06\/chromium-from-water.jpg\" class=\"attachment-large size-large wp-image-39222\" alt=\"\" srcset=\"https:\/\/services.jacobi.net\/wp-content\/uploads\/2021\/06\/chromium-from-water.jpg 682w, https:\/\/services.jacobi.net\/wp-content\/uploads\/2021\/06\/chromium-from-water-300x197.jpg 300w, https:\/\/services.jacobi.net\/wp-content\/uploads\/2021\/06\/chromium-from-water-595xh.jpg 595w\" sizes=\"(max-width: 682px) 100vw, 682px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3bd01fe7 e-flex e-con-boxed e-con e-parent\" data-id=\"3bd01fe7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-75ba55f9 elementor-widget elementor-widget-text-editor\" data-id=\"75ba55f9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Come si rimuove il cromo dall\u2019acqua?<\/h3><p>Quando il cromo \u00e8 presente come complesso anionico come il cromato (CrO\u2084\u00b2\u00af) o il bicromato (Cr\u2082O\u2087\u00b2\u00af), una resina anionica di base forte (SBA), tipo 1, come Resinex\u2122 A-4, pu\u00f2 essere utilizzata con un\u2019efficienza paragonabile a quella di una resina chelante. Il gruppo quaternario-amminico di Resinex\u2122 A-4 mostra un\u2019affinit\u00e0 molto elevata con gli ioni cromati e bicromati. Le resine non possono essere rigenerate. Il meccanismo di rimozione \u00e8 descritto dalla reazione che segue:<\/p><p>2 R-N+(CH\u2083)\u2083 Cl- + CrO\u2084\u00b2\u00af \u2192 2 [R-N+(CH\u2083)\u2083] CrO\u2084\u00b2- + 2 Cl\u00af<\/p><p>2 R-N+(CH\u2083)\u2083 Cl- + Cr\u2082O\u2087\u00b2\u00af \u2192 2 [R-N+(CH\u2083)\u2083] Cr\u2082O\u2087\u00b2+ 2 Cl\u00af<\/p><p>Con una concentrazione di ingresso inferiore a 200mg\/l, la capacit\u00e0 operativa di Resinex\u2122 A-4 dovrebbe essere di +\/- 12 g, espressi come Cr per litro di resina (+\/-12 kg\/m\u00b3).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2bace854 e-flex e-con-boxed e-con e-parent\" data-id=\"2bace854\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-78a25e22 elementor-widget elementor-widget-text-editor\" data-id=\"78a25e22\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Condizioni operative raccomandate per la rimozione del cromo<\/h3><p>Il filtro mobile AquaFlow\u2122 pu\u00f2 essere impiegato per la rimozione del piombo (Pb\u00b2\u207a) con un tempo di contatto superficiale di almeno sei minuti, ma di solito raccomandiamo di impiegare due filtri mobili AquaFlow\u2122 in serie, ottenendo cos\u00ec una portata media di 10-30 BV\/h.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3845378b e-flex e-con-boxed e-con e-parent\" data-id=\"3845378b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a07c56d elementor-widget elementor-widget-text-editor\" data-id=\"a07c56d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Come progettare un sistema di rimozione del cromo?<\/h3><p>Si ipotizzi una falda acquifera contaminata con 0,5 mg\/l come Cr di cromato (Cr\u02c5\u02e1\u207a) che deve essere trattata con le seguenti propriet\u00e0:<\/p><ul><li>Portata media di 30m\u00b3\/h<\/li><li>Funzionamento continuo 24\/24 -7\/7<\/li><li>Concentrazioni di cromo di 0,5mg\/l = 0,5g\/m\u00b3<\/li><li>Il carico annuale di cromo in acqua contaminata: 30m\u00b3\/h x 8600hpa = 258.000m\u00b3<\/li><li>Il carico annuale di cromo: 0,5 g\/m\u00b3 x 258.000 m\u00b3 = 129.000 g = 129 kg di cromo<\/li><\/ul><p>Ne risulta un carico medio di 12 kg di Cr\/m\u00b3 per Resinex\u2122 A-4 ed un consumo stimato di circa 11m\u00b3 di Resinex\u2122 A-4 all\u2019anno. Per ottenere la frequenza di scambio desiderata, Resinex\u2122 pu\u00f2 essere utilizzata con il filtro mobile AquaFlow\u2122, parte della nostra gamma di filtri mobili industriali.<\/p><p>Raccomandiamo di contattare i nostri esperti tecnici per il corretto dimensionamento del sistema di rimozione dei metalli pesanti, in quanto altri metalli possono influenzare la durata media stimata della resina.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Da dove viene il cromo? Il cromo, che \u00e8 uniformemente distribuito nella crosta terrestre, \u00e8 ottenuto dai minerali di cromite, o ossido di cromo di ferro (FeCr\u2082O\u2084). Il cromo esavalente (Cr\u02c5\u02e1\u207a) \u00e8 molto tossico e ha effetti mutageni e cancerogeni, in contrasto con il cromo elementare trivalente (Cr\u02e1\u02e1\u02e1\u207a) che \u00e8 un nutriente essenziale. Figura 1:&hellip;<\/p>\n","protected":false},"author":32,"featured_media":39226,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3681],"tags":[3559,3560],"class_list":["post-20661","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trattamento-delle-acque-it","tag-chromium-it-2","tag-water-purification-it-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.5 (Yoast SEO v28.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Rimozione del cromo dall&#039;acqua. | Jacobi Services<\/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:\/\/services.jacobi.net\/it\/rimozione-del-cromo-dall-acqua-con-resine-a-scambio-ionico\/\" \/>\n<meta property=\"og:locale\" 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