Evaluating Zeolites of Different Origin for Eutrophication Control of Freshwater Bodies

Irene Biliani, Eirini Papadopoulou and Ierotheos Zacharias ()
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Irene Biliani: Laboratory of Environmental Engineering, Department of Civil Engineering, University of Patras, 26500 Rio, Greece
Eirini Papadopoulou: Laboratory of Environmental Engineering, Department of Civil Engineering, University of Patras, 26500 Rio, Greece
Ierotheos Zacharias: Laboratory of Environmental Engineering, Department of Civil Engineering, University of Patras, 26500 Rio, Greece

Sustainability, 2025, vol. 17, issue 15, 1-18

Abstract: Eutrophication has become the primary water quality issue for most of the freshwater and coastal marine ecosystems in the world. Caused by excessive nitrogen (N) and phosphorus (P) inputs, it has a significant impact on aquatic ecosystems, resulting in algal blooms, oxygen depletion, and biodiversity loss. Zeolites have been identified as effective adsorbents for removal of these pollutants, improving water quality and ecosystem health. Kinetic and isotherm adsorption experiments were conducted to examine the adsorption efficiency of four zeolites of various origins (Greek, Slovakian, Turkish, and Bulgarian) and a specific modification (ZeoPhos) to determine the most effective material for N and P removal. The aim of the study is to discover the best zeolite for chemical adsorption in eutrophic waters by comparing their adsorption capacities and pollutant removal efficiencies along with SEM, TEM, and X-RD spectrographs. Slovakian ZeoPhos has been identified as the best-performing material for long-term and efficient water treatment systems for eutrophication management.

Keywords: eutrophication; zeolites; ZeoPhos; ammonium; orthophosphate; adsorption capacity; adsorption efficiency (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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