Mahmoud M. Fouad, Ahmed S. El-Gendy
The water treatment industry produces significant quantities of sludge and consumes vast amounts of coagulants like alum, leading to environmental and economic concerns. This study aims to explore the recovery of aluminum coagulants from sludge through acidification, focusing on the leaching of iron, manganese, and chromium. Sludge samples were collected from the El-Sheikh Zayd water treatment plant in Egypt, then dried and ground. The effects of various parameters, including acid concentration, sludge mass, temperature, mixing speed, and time on metal leaching efficiency were investigated. Results demonstrated that sulfuric acid was more effective in leaching iron, manganese, and chromium compared to hydrochloric acid. Moreover, higher concentrations of sulfuric acid, elevated temperatures, and increased rotational speeds led to enhanced leaching efficiencies. Despite the leaching of these metals, their concentrations in the recovered coagulants remain sufficiently low, thus not limiting their application in water and wastewater treatment processes. This research highlights the potential for enhancing coagulant recovery from water treatment sludge while maintaining treated water quality.
@article{92008781-1a92-4507-b78a-74ba1c2f0283,
title={Evaluation of leached metals in recovered aluminum coagulants from water treatment slurry},
author={Mahmoud M. Fouad and Ahmed S. El-Gendy},
year={2017},
language={en}
}TY - JOUR TI - Evaluation of leached metals in recovered aluminum coagulants from water treatment slurry AU - Mahmoud M. Fouad AU - Ahmed S. El-Gendy PY - 2017 LA - en ER -
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