Synthesis of Calcium Peroxide Microparticles in Aqueous at Room Temperature and its Application in Heavy Metal Ions Removal from Waste Liquid of COD Determining

Abstract:

The calcium peroxide microparticles were synthesized and evaluated as an innovative oxidant to remove Fe (III) and Cr (III) from waste liquid of COD determining samples. The CaO₂ microparticles were 0.1-0.3 μm in diameter and the average CaO₂ content was 80%. Experiments were performed to investigate the influence of contact time, pH of solution and CaO₂ microparticles dosage on the efficiency of Fe (III) and Cr (III) removal. Up to 100.0% and 99.8% removal efficiency for Fe (III) and Cr (III) respectively was obtained by microparticles dosage of 10000 mg/L at 30 min and pH 7.46. It could be concluded that the removal efficiency was enhanced by increasing CaO₂ microparticles dosage and reaction time, but decreased by increasing pH. These results suggest that CaO₂ microparticles may be used to develop a simple and efficient removal method for waste liquid of COD determining samples.

• Periodical: Advanced Materials Research (Volumes 864-867)
• Pages: 648-653
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.864-867.648
• Online since: December 2013
• Authors: Jian Zhai, Chun Hua Jiang
• Keywords: Heavy Metal Ion, Micro CaO₂, Waste Liquid of COD Determining

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