Removal of Trace Sulfuric Acid Radical in Aqueous Solution with Foam Fractionation
SONG Wei-guang WU Zhao-liang LU Ke ZHENG Hui-jie
School of Chemical Engineering, He Bei University of Technology Departmen of Biochemical Engineering，Heibei University of Technology Departmen of Biochemical Engineering，Heibei University of Technology Departmen of Biochemical Engineering，Heibei University of Technology
Abstract：Separation of SO42- from simulated aqueous solution with the technology of foam fractionation was studied by using (1-hexadecyl)trimethyl ammonium hydroxide as the surfactant. The effects of pH, gas flow rate, surfactant dosage and volume of the solution on the separation were investigated. The experimental results showed that (1-hexadecyl)trimethyl ammonium hydroxide had good foam performance and removed SO42- effectively from aqueous solutions. Efficient separation of SO42- was achieved (enrichment ratio reached 22.4 and removal rate 94.1%) under the conditions of pH=10, gas flow rate 0.036 m3/h, surfactant dosage 0.13 g/L and volume of the solution 900 mL. In contrast with the commonly used cation surfactants, this technology would not introduce new acid radical ions in the aqueous solution by using (1-hexadecyl)trimethyl ammonium hydroxide, thus a new method was put forward for removing salts by foam fractionation.
2008, Vol. 8 
