Hexavalent Chromium Leaching Influenced Factors in the Weathering Chrome Slag
Факторы, влияющие на выщелачивание шестивалентного хрома в подвергшемся выветриванию хромовом шлаке
2013-01-01
SCID: 54.1/8afphuwj
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chrome slag weatheringchromium leachinghexavalent chromiumliquid-solid ratio 20:1particle size 100–200 mesh
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Abstract (AI)
The distribution of hexavalent chromium in the weathering slag was studied, as well as the influenced factors of aqueous agent leaching chromium. Results showed an optimal leaching condition: the chromium particle size is 100– 200 mesh, the liquid-solid ratio is 20:1, the leaching time is 4h–8 h. Enhanced temperature and reduced pH value are benefit to hexavalent chromium leaching. Considering the equipment corrosion of low pH, the optimal pH value is 3–4.
Key Findings
1
Considering equipment corrosion, an optimal leaching pH range is 3–4.
2
Higher temperature increases hexavalent chromium leaching from weathered chrome slag.
3
Lower pH enhances hexavalent chromium leaching, but equipment corrosion at very low pH limits practicality.
4
Optimal leaching conditions for hexavalent chromium: particle size 100–200 mesh, liquid-solid ratio 20:1, leaching time 4–8 hours.
Research Object
Weathering chrome slag
Research Subject
Factors influencing hexavalent chromium (Cr(VI)) leaching from the weathering chrome slag, including particle size, liquid–solid ratio, leaching time, temperature, and pH
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2013-01-01
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