Scholarly record
ASSESSMENT OF THE ECOTOXIC PROPERTIES OF COMBUSTION BY-PRODUCTS FROM CO-COMBUSTION BIOMASS AND HARD COAL IN A FLUIDIZED BED BOILER
Abstract
The aim of the study was to evaluate selected properties of fly ash and bottom ash produced after co-combustion of biomass (30%) and hard coal in a fluidized bed boiler. As part of the study, the pH of the test material was determined and its elemental composition was analyzed using X-ray fluorescence (XRF). Additionally, the ecotoxic properties of combustion by-products (CBPs) were assessed using an acute toxicity test on aqueous extracts (relative to the test plant: Lepidium sativum) and a standardized phytotoxicity test – Phytotoxkit. The study results showed that the analyzed fly ash and bottom ash exhibited phytotoxic properties, manifesting as inhibited seed germination and reduced root growth in the test plants. These results indicate the need for careful management of these energy wastes in the context of their potential environmental use. Therefore, further comprehensive chemical analyses and long-term leaching behavior studies are strongly recommended to precisely determine the mobility of toxic elements in the soil matrix.
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