o:4940 Application of natural zeolite – clinoptilolite in water treatment by adsorption and photocatalysis en Abstract: The adsorptive and photocatalytic performance of the Serbian clinoptilolite-rich zeolitic tuff (ZT) is reported. Mg2+, Pb2+, Mn2+, Ni2+, Cu2+, and Zn2+ adsorption studies, as well as kinetics and thermodynamics, were conducted by ZT under carefully controlled temperature, pH, grain size, and solid/liquid weight ratio conditions. ZT has a good adsorption capacity for the metal cations under study. By converting ZT to Fe-containing ZT (Fe-ZT and Fe3O4-ZT), the ZT becomes effective at eliminating phosphate and nitrate ions, which are typically found in surface and groundwater, as well as the antibiotic ciprofloxacin, which is one of the most used antibiotics and is present in wastewater as an organic micropollutant. It was also found that ZT exhibits photocatalytic activity in the decomposition of common organic dyes such as methylene blue (MB). The photocatalytic activity was ascribed to trace amounts of the Fe species as a minor satellite phase in the tuff. Sn-containing ZT (Sn-ZT) also shows catalytic activity in the MB degradation. The ZT decomposes MB in an eco-friendly manner at room temperature, atmospheric pressure, and visible light irradiation. zeolite, clinoptilolite, toxic metal cations, adsorption, photocatalysis 1552100 978-86-6305-152-2 91552100 147002889 2024-07-04T11:04:31.815Z 44 no 46 Nevenka Rajić Faculty of Ecology and Environmental Protection, University Union – Nikola Tesla, Cara Dušana 62–64, 11158 Belgrade, SERBIA 46 Jelena Pavlović Institute of Soil Science 0000-0001-9424-1080 application/pdf 3771481 https://unilib.phaidrabg.rs/o:4940 no yes 1 70 92000004 71A05 Proceedings: 31st International Conference Ecological Truth & Environmental Research – ECOTER’24 2024