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Effect of pH and Coexisting Anions on Removal of Phosphate from Aqueous Solutions by Inorganic-Based Mesostructures

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This study investigated the effect of pH and the presence of coexisting (competitive) anions on the removal of phosphate by titanium mesostructures synthesized using do- or hexadecyltrimethylammonium bromide. To address these research objectives, experiments were conducted (1) under controlled initial pH values (2 to10); and (2) through injection of nitrate, fluoride, chloride, or sulfate anions into a phosphate solution. Based on the experimental results, an initial of pH of 2 was found to be optimal for use of titanium mesostructures. The presence of fluoride anions in solution significantly decreased the removal efficiency of phosphate removal (3.56% at 3.95 mg/g). However, the addition of nitrate, chloride, and sulfate anions did not affect phosphate removal.
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Keywords: coexisting ion; mesostructure; pH; phosphate; titanium

Document Type: Research Article

Affiliations: 1: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Seoul 2: Department of Earth and Environmental Sciences, Korea University, Seoul

Publication date: 2012-07-01

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