V predstavljenem delu smo preučevali dejavnike, ki vplivajo na sorpcijo hranil iz prašičje gnojevke na ekspandiran vermikulit. Spremljali smo časovni potek (2, 24 h, 3, 8, 10, 20 dni) vezave NH4+, K+ ...in Na+ iona v dveh temperaturnih območjih (20-25 ŚC in 5-10 ŚC). Uporabili smo ekspandiran afriški in ruski vermikulit s CEC 160-170 mmol/100g vermikulita. Ugotovili smo, da se pri višji temperaturi saturacije na vermikulit veže večja količina dušika. Za vezavo dušika so najpomembnejši prvi trije do osmi dnevi. Ruski vermikulit je vezal do 129, afriški pa do 49 mmol dušika/100g zračno suhega vermikulita. Vsebnost natrija in kalija se je v obeh vermikulitih po saturacijah zmanjšala. Izmenjava je bila končana v prvih dveh urah saturacije.
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