LEACHING BEHAVIOR OF SELECTED METALS IN ALKALI-ACTIVATED CONCERETE MADE WITH INDUSTRIAL WASTE

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2023

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The use of alkali-activated materials to immobilize heavy metals in precursors represents a promising avenue in environmental remediation and waste management. Alkali-activated materials, with their unique properties and ability to form stable matrices, offer a potential solution to mitigate the environmental impact of heavy metal contamination.Over the course of industrial development, several materials once widely used for their advantageous properties were later found to pose significant risks to human health and safety. Two notable examples are asbestos and per- and polyfluoroalkyl substance, both of which became prevalent in various industries before their detrimental health effects were fully understood. In this vein, the ability of alkali-activated materials utilizing H-Power Municipal Solid Waste Incineration Ash, AES fly ash, and red mud to immobilize heavy metals present in precursor materials should be thoroughly understood before they can be adopted into industrial use. This study furthers the research of Reza Mirmoghtadaei and Lin Shen by subjecting three samples of alkali-activated materials, and the granular materials used as precursors in the mix design of the aforementioned monolithic alkali-activated samples, to EPA Test Method 1315 leaching tests to evaluate the leaching behavior of each mix and the constituent granular precursor material. Significant reductions in leached metal concentrations were found when comparing compacted granular precursor materials to their alkali-activated counterpart.

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Civil engineering, alkali-activated, geopolymer, leaching, metal, MSWI ash

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141 pages

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