Study on Arsenic Removal Efficiency and Mechanism of Titanium Modified Manganese Ore

Abstract:

Natural manganese ore is a kind of arsenic removal mineral. It is low-cost and widely available. In order to enhance its removal efficiency and adsorption quantity of arsenic, this paper adopted TiCl₄ to modify natural manganese ore and optimized the conditions of modification. The results showed that the best modification condition was: TiCl₄ at a concentration of 10 mg•L^-1, dipping time of 18h, pH 3.05, reaction time of 60 min; under these conditions, the removal rates of As (Ⅲ) and As (Ⅴ) respectively reached 94.87% and 99.31%, much higher compared with natural manganese ore (82.95% and 77.93%). The saturated adsorption quantity of As (Ⅲ) and As (Ⅴ) reached 3.48 mg•g^-1 and 3.27 mg•g^-1, each increasing 1.25 mg•g^-1 and 1.21 mg•g^-1. The adsorption of As (Ⅲ) by modified manganese ore fits the Freundlich adsorption isotherm, while As (Ⅴ) fits the Langmuir adsorption isotherm best.

• Periodical: Advanced Materials Research (Volumes 356-360)
• Pages: 1061-1065
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.356-360.1061
• Online since: October 2011
• Authors: Yong Bing Huang, Xiu Ying Liu, Li Li Wang, Xiao Juan Li, Shu Xin Tu
• Keywords: Arsenic Removal, Manganese Ore, Mechanism, Modification, TiCl₄

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