eng application/pdf 967389 bytes 2017 clinoptilolite, nitrate, potassium, retention, soil Pavlović, Jelena Krogstad, Tore Rajić, Nevenka info:eu-repo/semantics/conferenceProceedings Influence of natural zeolite - clinoptilolite on potassium and nitrate retention in different soil types All rights reserved Abstract: As-received and iron(III)-modified natural zeolites were used for studying of potassium and nitrate retention in different soil types (sandy, silty loam and silty clay) under laboratory conditions by using column systems. The concentration of K+ and NO3–N in the leachates was monitored during seven days. The results showed that the retention of K+ and NO3-N mainly depends on the soil type. The addition of zeolite has the highest impact on the K+ retention in the acidic sandy soil. For all studied soil types, the leaching kinetics of K+ follows the Avrami kinetics model with the parameter n < 1 indicating a high initial rate, which decreases with time. Proceedings of the 7th Slovenian-Serbian-Croatian Symposium on Zeolites https://unilib.phaidrabg.rs/o:3496 ISSN: 2584-3176