Preparation and wastewater treatment performance of zeolite-modified ecological concrete

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Abstract This study developed a zeolite-modified ecological concrete and investigated the effects of zeolite content and particle size on its physical and mechanical properties, as well as its degradation performance. Experimental results demonstrated that for a given particle size of zeolite, an increase in zeolite content led to higher compressive strength. Conversely, with a constant zeolite content, the compressive strength of the concrete blocks increased with larger zeolite particle sizes. In water purification tests, a reduction in zeolite particle size enhanced the melanin removal rate. Specifically, when the zeolite particle size was 0.5–1 mm and the zeolite content was 20%, the melanin removal rate reached 62.4%. At this composition, the water purification efficacy of the concrete blocks was optimal, and their physical and mechanical properties met the necessary application standards.