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Study on Removing Methanthiol with Chlorine Dioxide
Corresponding Author(s) : Xueping Song
Asian Journal of Chemistry,
Vol. 26 No. 15 (2014): Vol 26 Issue 15
Abstract
In this paper, the experimental device of chlorine dioxide (ClO2) solution removing methanthiol (CH3SH) gas was designed and the removal process was studied. The absorbent of residual ClO2, the amount of ClO2, the reaction temperature, the pH value of ClO2 solution and the air flow effect on the removal rate of CH3SH were studied. The optimum conditions of removing CH3SH are as follows: the mixed lye of NaOH and Na2S as the absorbent of residual ClO2 and the molar ratio of NaOH and Na2S 1:1, the molar ratio of CH3SH and ClO2 1:2.5, the temperature 35 °C, the pH value of ClO2 solution 2, the compressed air flow 0.75 m3/h. Under this conditions, the results show that the concentration of CH3SH is reduced from the initial 1.457 g/m3 to 0.032 mg/m3, the removal rate of CH3SH attains to 99.8 %, which meets level 3 national emission standards.
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References
C. Bangwei, The Pulp and Paper Industry's Environmental Governance, China Light Industry Press, Beijing, pp. 169-170 (2008).
H.F. Shulan, Detection and Analysis of Pulp and Paper, China Light Industry Press, Beijing (2009).
National Environmental Protection Agency of Science, Technology and Standards Division, GB/T 14678-1993 Air Quality of Hydrogen Sulfide, Methanthiol, Dimethyl Sulfide and Dimethyl Disulfide by Gas Chromatography, Standards Press of China, Beijing (1993).
W. Shuangfei and H. Lijie, Chlorine Dioxide Preparation and Application, China Light Industry Press, Beijing, vol. 8 (2010).
H.X. Wu and K. T. Wang, A Deal with the Pharmaceutical Industry Wastewater Malodorous Gases: Patent 101703882A (2010).
Z. Lijiang, Headspace Chromatography Mercaptans, Thioethers Material Research, North China Electric Power University, Baoding (2005).
S. Li and Z. Jiayu, Pract. Prev. Med., 6, 390 (1999).