{"id":20605,"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":"2025-12-02T11:58:38","modified_gmt":"2025-12-02T11:58:38","slug":"chroomverwijdering-uit-water","status":"publish","type":"post","link":"https:\/\/services.jacobi.net\/nl\/chroomverwijdering-uit-water\/","title":{"rendered":"Chroomverwijdering uit water."},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"20605\" class=\"elementor elementor-20605\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4c4d600 e-flex e-con-boxed e-con e-parent\" data-id=\"4c4d600\" 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-72689514 elementor-widget elementor-widget-text-editor\" data-id=\"72689514\" 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>Waar komt chroom vandaan?<\/h3><p>Chroom, dat gelijkmatig verdeeld is in de aardkorst, wordt verkregen uit chromiet-ertsen, een mineraal van ijzerchroomoxide (FeCr\u2082O\u2084). Het zeswaardig chroom (Cr\u02c5\u02e1\u207a) is zeer giftig en heeft zowel mutagene als carcinogene effecten, in tegenstelling tot het driewaardig elementair chroom (Cr\u02e1\u02e1\u02e1\u207a), dat een essenti\u00eble voedingsstof is.<\/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-5d39ccae e-flex e-con-boxed e-con e-parent\" data-id=\"5d39ccae\" 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-71656a9d elementor-widget elementor-widget-text-editor\" data-id=\"71656a9d\" 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>Figuur 1: Chroomerts<\/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-2be14e55 elementor-widget elementor-widget-image\" data-id=\"2be14e55\" 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-39211\" 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-674e1677 e-flex e-con-boxed e-con e-parent\" data-id=\"674e1677\" 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-43a5ca62 elementor-widget elementor-widget-text-editor\" data-id=\"43a5ca62\" 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>Chroom wordt al jaren op grote schaal gebruikt in diverse industri\u00eble processen als corrosieremmer, pigment en kleurbevestigingsmiddel. (Bijvoorbeeld in koeltorens, bij galvanisatie en in de textielindustrie). Het gebruik van chroomhoudende verbindingen neemt in de praktijk drastisch af vanwege de zorg voor de gezondheid en het milieu. Het grondwater van verontreinigde gebieden kan nog steeds concentraties vertonen die boven de richtlijn van de Wereldgezondheidsorganisatie (WHO) van 50 \u00b5g\/l als totaal chroom liggen.<\/p><p>Het Pourbaix- of potentiaal\/pH-diagram in figuur 2 van chroom toont de chroomspeciatie in het water. Het gebied tussen de oranje stippellijnen geeft de stabiliteitszone van het water weer. Figuur 1 laat zien dat de chroomspeciatie in water wordt gedomineerd door chromaat (CrO\u2084\u00b2\u00af), dichromaat (Cr\u2082O\u2087\u00b2\u00af) en het driewaardige elementaire chroom (Cr\u00b3\u207a). Chromaat (CrO\u2084\u00b2\u00af) en dichromaat (Cr\u2082O\u2087\u00b2\u00af) zijn oxyanionen van het zeswaardige chromaat (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-16b9ef30 e-flex e-con-boxed e-con e-parent\" data-id=\"16b9ef30\" 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-41f76ac elementor-widget elementor-widget-text-editor\" data-id=\"41f76ac\" 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>Figuur 2: De Pourbaix of potentiaal\/pH-diagram van chroomsoorten<\/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-674815ee elementor-widget elementor-widget-image\" data-id=\"674815ee\" 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-39219\" 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-5b5315a7 e-flex e-con-boxed e-con e-parent\" data-id=\"5b5315a7\" 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-56ffe067 elementor-widget elementor-widget-text-editor\" data-id=\"56ffe067\" 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>Hoe wordt chroom uit het water verwijderd?<\/h3><p>Wanneer chroom aanwezig is als anionische complexen zoals chromaat (e-berg7) of dichromaat (Cr\u2082O\u2087\u00b2\u00af), kan een sterke base anion (SBA) hars, zoals Resinex\u2122 A-4, worden gebruikt met een vergelijkbare effici\u00ebntie als een chelaathars. De quaternaire-amino groep van Resinex\u2122 A-4 vertoont een zeer hoge affiniteit voor chromaat- en dichromaat-ionen. De harsen kunnen niet geregenereerd worden. Het verwijderingsmechanisme wordt beschreven door de reactie hieronder:<\/p><p style=\"padding-left: 40px;\">3 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 style=\"padding-left: 40px;\">3 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>Bij een inlaatconcentratie van minder dan 200mg\/l zal de werkingscapaciteit van Resinex\u2122 A-4 naar verwachting +\/- 12 g zijn, uitgedrukt in Cr per liter hars (+\/-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-7ce6f9d5 e-flex e-con-boxed e-con e-parent\" data-id=\"7ce6f9d5\" 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-55f4e719 elementor-widget elementor-widget-text-editor\" data-id=\"55f4e719\" 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>Aanbevolen werkomstandigheden voor chroomverwijdering<\/h3><p>E\u00e9n <a href=\"https:\/\/services.jacobi.net\/nl\/vloeistofbehandeling-met-industriele-filters\/\"><strong>AquaFlow\u2122<\/strong><\/a> kan gebruikt worden voor het verwijderen van chroom bij een oppervlakkige contacttijd van minimaal zes minuten, maar meestal worden er twee AquaFlow\u2122 in serie gebruikt met een typische stroomsnelheid per vat van 10-30 bedvolumes per uur (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-23cd4bce e-flex e-con-boxed e-con e-parent\" data-id=\"23cd4bce\" 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-5232188d elementor-widget elementor-widget-text-editor\" data-id=\"5232188d\" 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>Hoe ontwerp je een chroomverwijderingssysteem?<\/h3><p>Ga uit van een verontreinigd grondwater met 0,5 mg\/l als Cr of Chromaat (Cr\u02c5\u02e1\u207a) dat gezuiverd moet worden met de volgende eigenschappen:<\/p><ul><li>Gemiddeld debiet van 30m\u00b3\/h<\/li><li>Continue werking 24\/24 -7\/7<\/li><li>Chroomconcentraties van 0,5mg\/l = 0,5g\/m\u00b3.<\/li><li>Jaarlijks met chroom verontreinigd grondwater 30m\u00b3\/h x 8600hpa = 258.000m\u00b3<\/li><li>De jaarlijkse chroombelasting: 0,5g\/m\u00b3 x 258.000m\u00b3 = 129.000g = 129kg chroom<\/li><\/ul><p>Dit geeft bij een gemiddelde belasting van 12 kg Cr\/m\u00b3 <strong>Resinex\u2122 A-4<\/strong> een verbruik van ongeveer 11m\u00b3 <strong>Resinex\u2122 A-4<\/strong> per jaar. Een <a href=\"https:\/\/services.jacobi.net\/nl\/vloeistofbehandeling-met-industriele-filters\/\"><strong>AquaFlow\u2122<\/strong><\/a> kan dan gekozen worden uit ons industri\u00eble mobiele filterassortiment om de gewenste uitwisselingsfrequentie te verkrijgen.<\/p><p>Het is altijd aan te raden om <a href=\"https:\/\/services.jacobi.net\/nl\/contact\/\">contact<\/a> op te nemen met onze technische expert voor de dimensionering van een systeem voor het verwijderen van zware metalen, aangezien andere metalen kunnen interfereren in het geschatte verbruik.<\/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>Waar komt chroom vandaan? Chroom, dat gelijkmatig verdeeld is in de aardkorst, wordt verkregen uit chromiet-ertsen, een mineraal van ijzerchroomoxide (FeCr\u2082O\u2084). Het zeswaardig chroom (Cr\u02c5\u02e1\u207a) is zeer giftig en heeft zowel mutagene als carcinogene effecten, in tegenstelling tot het driewaardig elementair chroom (Cr\u02e1\u02e1\u02e1\u207a), dat een essenti\u00eble voedingsstof is. Figuur 1: Chroomerts Chroom wordt al jaren&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":[3717],"tags":[],"class_list":["post-20605","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-water-behandeling"],"acf":[],"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>Chroomverwijdering uit water. | 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\/nl\/chroomverwijdering-uit-water\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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