Plasma Technology for Phosphogypsum Treatment
| Autor: | Ibrahim A. Alshunaifi, Ahmed A. Al-Harbi, Miqad S. Albishi, Imed Ghiloufi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization Renewable Energy Sustainability and the Environment Magnesium Phosphorus thermal plasma Radiochemistry Energy Engineering and Power Technology chemistry.chemical_element Phosphogypsum Sulfur characterization techniques Waste treatment chemistry waste treatment phosphogypsum Chlorine Electrical and Electronic Engineering Inductively coupled plasma Engineering (miscellaneous) Pyrolysis Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 5813, p 5813 (2021) Energies; Volume 14; Issue 18; Pages: 5813 |
| ISSN: | 1996-1073 |
| Popis: | The phosphate industry generates a large amount of waste called phosphogypsum (PG). Generally, this waste is discharged without any treatment, and it causes considerable environmental problems. Hence, the objective of this study is the treatment of phosphate waste using thermal plasma technology. First, the waste is characterized using different techniques, such as X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and inductively coupled plasma (ICP). Such characterization shows that the waste contains different toxic elements, such as heavy metals, fluorine, chlorine, sulfur, and phosphorus. For this reason, a plasma reactor is used to separate toxic elements from metals, such as silicon, aluminum, and magnesium, with a pyrolysis/combustion plasma system. In this work, the influence of different parameters, such as time of treatment and plasma current, on the volatility of toxic elements is studied. The obtained results show that after 40 min of treatment and at a plasma current of 160 A, the phosphogypsum completely melts, and the most toxic elements, namely Pb, Cd, V, Cr, and As, are completely vaporized. |
| Databáze: | OpenAIRE |
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