Photocatalytic Removal of Toxic Hg(II) Ions Using TiO2-Modified Bamboo Charcoal as Photocatalyst

Chang Bin Xia; Chun Hua Liu; Zhi Hua Liu; Dao Xin Wu

doi:10.4028/www.scientific.net/AMR.550-553.2182

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 550-553Photocatalytic Removal of Toxic Hg(II) Ions Using...

Photocatalytic Removal of Toxic Hg(II) Ions Using TiO₂-Modified Bamboo Charcoal as Photocatalyst

Abstract:

Photocatalytic removal of mercury was studied using TiO₂-modified bamboo charcoal prepared with Sol-Gel method as photocatalyst, and formate as hole scavengers under UV irradiation. In the absence of formate additives, approximately 95% of 30 mg/L Hg(II) ions was found to be removed from the solution by adsorption. Addition of formate resulted in the photoreduction of Hg(II) to its metallic form. The best conditions of Hg(II)-containing wastewater treatment were determined. The results show that the optimum amount of photocatalyst was 4 g/L,the optimum illumination time was 30 min,reached a plateau value at pH 6, the photocatalyst calcinated for 2h at 500°C. and the optimum formate addition amount was found to be 120mg/L, which doubled the adsorption capacity. Accordingly, it is believed that the method developed in this study is effective and practical in industrial wastewater treatment for Hg(II) disposal.

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Periodical:

Advanced Materials Research (Volumes 550-553)

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2182-2185

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.550-553.2182

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Online since:

July 2012

Authors:

Chang Bin Xia, Chun Hua Liu, Zhi Hua Liu, Dao Xin Wu

Keywords:

Bamboo Charcoal, Mercury, Photoreduction, Sol-Gel Method, Titanium Dioxide (TiO₂)

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