Heavy Metals Leaching Characteristics Assessment of Medical Ash Wastes Through Cement Solidification / Stabilization Treatment Processes

Document Type : Original Research Paper

Authors

1 Scientific Research Commission Research and Technology Center of Environment,water and Renewable Energy, Baghdad, Iraq

2 Environment and Water Directorate, Ministry of Science and Technology, Iraq

Abstract

In this study. Baghdad hospital waste ash was analyzed to determine the type of heavy and toxic concentrations in the waste and to study the potential effects of radioactive waste, health risks and the effectiveness of S/S hardening/stabilization processes based on local cement. Toxic medical waste was used in this work as bottom ash, which includes large amounts of pollutants such as As, Co, Cr, and Hg. Ash samples were taken from the medical waste incinerators of the main hospital in the city. The heavy metal sludge is stabilized and solidified using this bottom ash. The curing matrix was between 7% and 25% local cement in varying amounts. Before arriving at the physical and chemical properties of the solid, it underwent six different periods of treatment. Filtration experiments using solid-liquid partitioning as a function of pH, the filtration method was deployed to determine treatment efficiency. The compressive strength confined to the forms was also measured to ensure the solidity and durability of the molds. After disposal, the most effective solid material with good strength was found, which contains 25% of local cement. In addition, the results of the study showed that the efficiency of treating the filtration method for toxicological properties Ranging from 85% to 100%. The range of treatment efficiency in liquid/solid technology was 75%-100%. The S/S process can be a very good, effective and safe treatment process for handling and disposing of toxic medical waste ash or the possibility of reusing the formwork in bridges and roads.

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References

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Pollution
Volume 10, Issue 4
September 2024
Pages 1227-1244

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