Removal of H2S gas by in situ generation of ferrate (VI) in aqueous alkaline solution

Document Type : Research Article

Authors

1 Department of Chemical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

2 Department of Chemistry, Najafabad Branch, Islamic Azad University, Najafabad, Iran

Abstract

This study demonstrated a new approach of odorous gas treatment in a wet scrubbing-oxidation system with in situ generation of ferrate(VI), in which gaseous H2S could be quickly absorbed by aqueous alkaline solution and rapidly oxidized by liquid ferrate(VI) generated through electrochemical synthesis in situ. Ferrate(VI) ion production in alkaline solution (NaOH) was studied and the results showed optimum temperature for producing ferrate(VI) ion in 14 molar electrolyte solution was 50°C, and increasing voltage in rang of 1 to 10 V leading to more ion production. From ferrate(VI) self-decomposition test, it was found that 80% of ferrate ion was decomposed in 100 minutes and the increase in the temperature from 23°C to 80°C result in self-decomposing of 57% of ferrate ion. In the second part of tests, in situ generated ferrate(VI) has been used to H2S removal. The effect of temperature, ferrate ion solution concentration and gas containing H2S flow rate on H2S removal efficiency was investigated and these results were found: the optimum temperature for H2S removal was 50 °C in the test conditions, at increasing of ferrate ion concentration from 0.6 to 1.65  , 98% of H2S was removed from the gas, as well as at increasing the solution by 1 , 95% of H2S was removed.

Keywords

Main Subjects

References

[1] Chou S., "Toxicological Profile for Hydrogen Sulfide", Public Health Service Agency for Toxic Substances and Disease Registry. Georgia USA(2004).
[2] Wiheeb A.D., Shamsudin I. K., Ahmad M. A., Murat M. N., Kim J., Othman M. R., Present Technologies for Hydrogen Sulfide Removal from Gaseous Mixtures, Rev. Chem. Eng., 29(6): 449–470 (2013).
[3] Chou C.H., Selene J., "World Health Organization & International Programme on Chemical Safety. Hydrogen Sulfide: Human Health Aspects". World Health Organization, Georgia USA(2003).
[4] Pourzolfaghar H., Mohd Halim, S. I., Izhar S., Review of H2S Sorbents at Low-Temperature Desulfurization of Biogas,  International Journal of Chemical and Environmental Engineering, 5(1): 22-28 (2014).
[5] Sánchez J. M., Ruiz E., Otero J., Selective Removal of Hydrogen Sulfide from Gaseous Streams Using a Zinc-Based Sorbent, Ind. Eng. Chem. Res., 44(2): 241–249 (2005).
[6] Ikeda H., Asaba H., Takeuchi Y.,  Removal of H2S, CH3SH and (CH3)3N from Air by use of Chemically Treated Activated Carbon, J. Chem. Eng. Jap., 21(1): 91-97 (1988).
[7] Kasperczyk D., Urbaniec K., Barbusinski K., Rene E. R.,  Colmenares-Quintero R. F., Application of a Compact Trickle-Bed Bioreactor for the Removal of Odor and Volatile Organic Compounds Emitted from a Wastewater Treatment Plant, Journal of Environmental Management, 236: 413-419 (2019).
[8] Gabriel D., Deshusses M. A., Retrofitting Existing Chemical Scrubbers to Biotrickling Filters for H2S Emission Control, PNAS, 100(11): 6308–6312 (2003).
[9] Chu H., Lee W., Horng K., Tseng T.K., The Catalytic Incineration of (CH3)2S and its Mixture with CH3SH Over a Pt/Al2O3 Catalyst, Journal of Hazardous Materials, 82(1): 43-53 (2001).
[10] Do J., Chen C.-P., In Situ Oxidative Degradation of Formaldehyde with Electrogenerated Hydrogen Peroxide, J. Electrochem. Soc. 140(6):1632 (1993)
[11] Kao C.M., Huang K. D., Wang J. Y., Chen T. Y., Chien H. Y., Application of Potassium Permanganate as an Oxidant for in Situ Oxidation of Trichloroethylene-Contaminated Groundwater: A Laboratory and Kinetics Study, J. Hazard. Mater, 153(3): 919–927(2008).
[12] Saravanathamizhan R., Soloman P.A., Balasubramanian N., Ahmed-Basha C., Optimization of In-Situ Electro-Oxidation of Formaldehyde by the Response Surface Method, Chemical and Biochemical Engineering Quarterly, 22(2): 213-220 (2008).
[13] Sharma V. K., Oxidation of Inorganic Contaminants by Ferrates (VI, V, and IV)-Kinetics and Mechanisms: A Review, J. Environ. Manage., 92(4): 1051–1073 (2011).
[14] Jiang Y., Goodwill J.E., Tobiason J.E., Reckhow D.A., Effect of Different Solutes, Natural Organic Matter, and Particulate Fe(III) on Ferrate(VI) Decomposition in Aqueous Solutions, Environ. Sci. Technol., 49(5): 2841–2848 (2015).
[15] Han Q., Wang H., Dong W., Liu T., Yin Y., Fan H., Degradation of Bisphenol A by Ferrate(VI) Oxidation: Kinetics, Products and Toxicity Assessment, Chem. Eng. J., 262: 34–40 (2015).
[16] Sharma V.K., Luther G.W., Millero F.J., Mechanisms of Oxidation of Organosulfur Compounds by Ferrate(VI), Chemosphere, 82(8): 1083–1089 (2011).
[17] Stanford C., Jiang J.-Q., Alsheyab M., Electrochemical Production of Ferrate (Iron VI): Application to the Wastewater Treatment on a Laboratory Scale and Comparison with Iron (III) Coagulant, Water, Air, Soil Pollut., 209(1–4): 483–488 (2010).
[18] Licht S., Yu X., Electrochemical Alkaline Fe(VI) Water Purification and Remediation, Environ. Sci. Technol., 39(20): 8071–8076 (2005).
[19] Yan X., Sun J., Kenjiahan A., Dai X., Ni B.-J., Yuan Z., Rapid and Strong Biocidal Effect of Ferrate on Sulfidogenic and Methanogenic Sewer Biofilms, Water Research, 169: 115208 (2020).
[20] Xia D., He C., Zhu L., Huang Y., Dong H., Su M., Abou Asi M., Bian D., A Novel Wet-Scrubbing Process Using Fe(vi) for Simultaneous Removal of SO2 and NO, J. Environ. Monit., 13(4): 864–870 (2011).
[21] Yu X., Licht S., Advances in Electrochemical Fe(VI) Synthesis and Analysis, J. Appl. Electrochem., 38(6): 731–742 (2008).
[22] Luo Z., Strouse M., Jiang J.-Q., Sharma V.K., Methodologies for the Analytical Determination of Ferrate(VI): A Review, J. Environ. Sci. Heal. Part A, 46(5): 453–460 (2011).
[23] Mácová Z., Bouzek K., Híveš J., Sharma V.K., Terryn R.T., Baum J.C., Research Progress in the Electrochemical Synthesis of Ferrate(VI), Electrochim. Acta, 54(10): 2673–2683 (2009).
[24 Sharma V.K., Oxidation of Nitrogen-Containing Pollutants by Novel Ferrate(VI) Technology: A Review, J. Environ. Sci. Heal. Part A, 45(6): 645–667 (2010).
[25] Sharma V.K., Cabelli D., Reduction of Oxyiron(V) by Sulfite and Thiosulfate in Aqueous Solution, J. Phys. Chem. A, 113(31): 8901–8906 (2009).
Nashrieh Shimi va Mohandesi Shimi Iran
Volume 41, Issue 3 - Serial Number 105
September 2022
Pages 357-364

Files

Share

How to cite

Statistics