Study on the physical and chemical characteristics of electric arc furnace dust from steel plant of Esfarayen and its reuse as an adsorbent
Journal of Health in the Field,
,
13 Farvardin 2020
Abstract
Background and Aims: EPA classifies dust from electric arc furnaces as hazardous waste. The purpose of this study was to measure the amount of heavy metals in dust and to investigate the removal of organic pollutants using this hazardous waste.
Materials and Methods: Dust samples were collected from the Esfarayen Steel Plant by coordinating the factory management. Following digestion of samples by Aqua regia solution in the laboratory, the concentration of heavy metals was measured using flame atomic absorption spectroscopy. To determine the rate of heavy metals recovery from the dust, distilled water was used with different pH of 11, 7, 5, 3, and 1. In addition, UV-spectrophotometry was used to investigate the ability of dust to adsorb organic pollutants. All stages of this research were conducted ethically.
Results: The average concentration of heavy metals in dust, in mg/kg, was obtained as iron> magnesium> zinc> manganese> nickel> lead> copper> cadmium> cobalt. The leaching study of this waste showed that cobalt metal ion has the highest leaching levels at different pH levels. Methylene Blue, Eriochrome Black T, Rhodamine, and Dexamethasone had the highest amount of adsorption by dust among the organic pollutants studied.
Conclusion: The present study showed that the recovery of iron concentrates in comparison with other metals is convenient and cost effective. Furthermore, the electric arc furnace dust can be used as a suitable inexpensive adsorbent.
Keywords: Dust Arc Furnace, Adsorbent, Heavy Metals, Organic Pollutants, Leaching
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