Removal of Al, Ba and Mg from industrial wastewater using EAFDS and lime

Abstract

Wastewater treatment and removal of hazardous metals is imperative for the well-being of living things and the environment. Different methods for the removal of hazardous metals have been proposed and practiced with varying success. In this study, dust slag generated by electric arc furnace is utilized for the removal of aluminium, barium and magnesium from industrial effluent. Slag which is a waste generated during the process of steel production is alkaline by nature. It was able to raise the pH of the acidic effluent to 8.7 removing most of the metals and reducing the amount of commercial alkali required to raise the pH to the target pH of 12.5. EAFDS in conjunction with lime removed 98% of Al, 95.8% of Ba and 99.7% of Mg. The method was simple, efficient and cost-effective since it utilizes a material considered hazardous waste for the treatment.

Identifying Geogenic and Anthropogenic Aluminum Pollution on Different Spatial Distributions and Removal of Natural Waters and Soil in Çanakkale, Turkey

“…On the other hand, precipitation with pH adjustment and ion exchange are promising methods for Al removal considering their ease of application, relatively low costs, and considerably high removal efficiencies . Namely, by adjusting the pH to an alkaline level with the help of calcium carbonate and lime, Al from acidic effluents can often be removed from the water by forming an insoluble precipitate . Furthermore, the removal of heavy metals in waters using an ion-exchange process with different synthetic or natural resins is one of the most promising methods owing to its features of easily recoverable end-products, the possibility of reuse after the regeneration step, and effectiveness.…”

“…5 Namely, by adjusting the pH to an alkaline level with the help of calcium carbonate and lime, Al from acidic effluents can often be removed from the water by forming an insoluble precipitate. 82 Furthermore, the removal of heavy metals in waters using an ion-exchange process with different synthetic or natural resins is one of the most promising methods owing to its features of easily recoverable end-products, the possibility of reuse after the regeneration step, and effectiveness. Heavy metal removal by various ion-exchange resins has been examined by many previous studies.…”

Genotoxic effect of heavy metals on Astyanax lacustris in an urban stream

“…Regarding the chemical elements associated with genetic damage in A. lacustris , Ba can cause multiple harmful effects on the renal and respiratory systems of animals ( Lu et al., 2019 ). That element has been associated with rapid urbanization and, together with Mg, is one of the most common elements in pharmaceutical industrial effluents ( Forsido et al., 2020 ). Ca and Mg cations are essential for fish development.…”

Functionalization of Silica Nanoparticles by 5-Chloro-8-quinolinol as a New Nanocomposite for the Efficient Removal and Preconcentration of Al3+ Ions from Water Samples

“…According to the World Health Organization, the level of aluminum in water is between 0.001 and 0.05 mg/L. According to the United States Environmental Protection Agency, the secondary significant contaminant limit for the aluminum in drinking water is between 0.05 and 0.20 mg/L . Therefore, it is essential for removing aluminum from the sources of water.…”

“…According to the United States Environmental Protection Agency, the secondary significant contaminant limit for the aluminum in drinking water is between 0.05 and 0.20 mg/L. 5 Therefore, it is essential for removing aluminum from the sources of water. Irrespective of the recognition technique, the assessment of trace amounts of metals requires preconcentration and separation processes to eliminate interfering influences and ensure that the analyte concentration is quantifiable.…”