{"id":2351,"date":"2026-09-02T12:47:19","date_gmt":"2026-09-02T12:47:19","guid":{"rendered":"https:\/\/www.jrebsen.dk\/?post_type=aktivitet&#038;p=2351"},"modified":"2026-09-02T12:47:20","modified_gmt":"2026-09-02T12:47:20","slug":"fjernelse-af-fosfat-og-partikler-med-jernclorid-fecl3-udfaeldning-og-flokkulering","status":"publish","type":"aktivitet","link":"https:\/\/www.jrebsen.dk\/?aktivitet=fjernelse-af-fosfat-og-partikler-med-jernclorid-fecl3-udfaeldning-og-flokkulering","title":{"rendered":"Fjernelse af fosfat og partikler med jernclorid (FeCl3) &#8211; Udf\u00e6ldning og flokkulering"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Form\u00e5l<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I skal unders\u00f8ge, hvordan jern(III)chlorid kan fjerne b\u00e5de opl\u00f8st fosfat og sm\u00e5 partikler fra modelspildevand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sikkerhed<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Brug briller og handsker. Undg\u00e5 kontakt med jern(III)chlorid. Alt vand og slam afleveres som anvist af l\u00e6reren.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Udstyr<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>modelspildevand med fosfat og fint ler<\/li>\n\n\n\n<li>fortyndet jern(III)chlorid<\/li>\n\n\n\n<li>fire reagensglas + stativ<\/li>\n\n\n\n<li>pipette og r\u00f8repinde<\/li>\n\n\n\n<li>pH-m\u00e5ler og fosfattest<\/li>\n\n\n\n<li>kittel, beskyttelsesbriller og handsker<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fremgangsm\u00e5de<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Fordel 20 mL modelspildevand i fire reagensglas.<\/li>\n\n\n\n<li>Tils\u00e6t f\u00f8lgende m\u00e6ngder jern(III)chlorid:<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>B\u00e6ger<\/strong><\/td><td><strong>Jern(III)chlorid<\/strong><\/td><\/tr><\/thead><tbody><tr><td>A<\/td><td>0 mL \u2013 kontrol<\/td><\/tr><tr><td>B<\/td><td>0,5 mL<\/td><\/tr><tr><td>C<\/td><td>1,0 mL<\/td><\/tr><tr><td>D<\/td><td>2,0 mL<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>Bland forsigtigt med en r\u00f8repind .<\/li>\n\n\n\n<li>Lad pr\u00f8verne bundf\u00e6lde i 10 minutter.<\/li>\n\n\n\n<li>M\u00e5l fosfat og pH, og vurder klarhed og slamm\u00e6ngde igen.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resultater<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table aligncenter\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>M\u00e5ling<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>A<\/strong> <br><strong>0 mL<\/strong> <strong>(kontrol)<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>B<\/strong> <br><strong>0,5 ml<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>C<\/strong> <br><strong>1,0 ml<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>D<\/strong><br> <strong>2,0 ml<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Fosfat efter rensning<\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><\/tr><tr><td>pH efter rensning<\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><\/tr><tr><td>Klarhed, 0\u20135<\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><\/tr><tr><td>Slamlagets h\u00f8jde<\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Analyse<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Hvilken dosis fjernede mest fosfat?<\/li>\n\n\n\n<li>Hvilken dosis gav det klareste vand?<\/li>\n\n\n\n<li>Hvilken dosis dannede mest slam?<\/li>\n\n\n\n<li>Hvilken dosis gav samlet set den bedste rensning?<\/li>\n\n\n\n<li>Hvor befinder fosfaten og lerpartiklerne sig efter rensningen?<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Faglig forklaring<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jernioner kan binde fosfat og danne jernhydroxidflokke. De sm\u00e5 partikler og urenheder indfanges i flokkene, som derefter synker til bunds som slam. Samtidig udf\u00e6ldes Jernfosfat som fast salt og fosfat tr\u00e6kkes derved ud at opl\u00f8sningen. &nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Form\u00e5l I skal unders\u00f8ge, hvordan jern(III)chlorid kan fjerne b\u00e5de opl\u00f8st fosfat og sm\u00e5 partikler fra modelspildevand. Sikkerhed Brug briller og handsker. Undg\u00e5 kontakt med jern(III)chlorid. Alt vand og slam afleveres som anvist af l\u00e6reren. Udstyr Fremgangsm\u00e5de B\u00e6ger Jern(III)chlorid A 0 mL \u2013 kontrol B 0,5 mL C 1,0 mL D 2,0 mL Resultater M\u00e5ling A [&hellip;]<\/p>\n","protected":false},"featured_media":0,"menu_order":0,"template":"","meta":[],"categories":[],"tags":[],"aktivitetstype":[],"elementrolle":[],"fag":[],"fagomraade":[],"produkt":[],"class_list":["post-2351","aktivitet","type-aktivitet","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=\/wp\/v2\/aktivitet\/2351","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=\/wp\/v2\/aktivitet"}],"about":[{"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=\/wp\/v2\/types\/aktivitet"}],"wp:attachment":[{"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2351"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2351"},{"taxonomy":"aktivitetstype","embeddable":true,"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Faktivitetstype&post=2351"},{"taxonomy":"elementrolle","embeddable":true,"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Felementrolle&post=2351"},{"taxonomy":"fag","embeddable":true,"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ffag&post=2351"},{"taxonomy":"fagomraade","embeddable":true,"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ffagomraade&post=2351"},{"taxonomy":"produkt","embeddable":true,"href":"https:\/\/www.jrebsen.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fprodukt&post=2351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}