Treatment of Cr(VI) WasteWater with Modified Coal Fly Ash

Abstract:

In this work, modified fly ash by Na₂CO₃ was prepared and used to remove the Cr (VI) in simulate wastewater, which was rarely reported in domestic and foreign. In the meantime, every single-factor experiment, which maybe influenced the removal ratio of Cr (VI), was done. The major-minor order of test factors and the optimum combination processing conditions influencing the treatment effects of Cr (VI) were determined according to the orthogonal experiment. The results showed that the major-minor order was initial concentration of Cr (VI), dosage of modified fly ash, adsorption duration, temperature and pH values. And the optimum combination of above discussed factors was 15 mg/L, 5 g, 90 min, 30 oC and 2.5, respectively. Under this optimum condition, the removal rate of Cr (VI) can reach more than 74.86%, approximately 1.35 times compared to that of original fly ash.

• Periodical: Applied Mechanics and Materials (Volume 768)
• Pages: 561-566
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.768.561
• Online since: June 2015
• Authors: Jing Wang*, Hui Yang Yu, Jun Fa Lin
• Keywords: Cr (VI) Wastewater, Fly Ash, Modification, Orthogonal Experiment, Single-Factor Experiment

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