Adsorption of H2S Gas by Modified Diatomite and Leonardite


Article Preview

This research aimed to modify of diatomite and leonardite for adsorption of hydrogen sulfide (H2S) gas. The effect of chemical loading on surface modification was studied. Natural diatomite and leonardite were obtained through the natural deposits in Lampang Province, Thailand. Diatomite and leonardite were modified using chemical methods with calcination at 450 °C. The chemical composition and phase structure of adsorbents were characterized by X–Ray fluorescence spectroscopy (XRF) and X–ray diffraction (XRD), respectively. The morphology and disperse energy of the elements were investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The functional group was identified by Fourier transform infrared spectroscopy (FT–IR). The efficiency of adsorption of H2S gas was studied. H2S gas in this study was synthesized by the chemical reaction between sodium sulfide (Na2S) and sulfuric acid (H2SO4). The concentration of hydrogen sulfide was measured by an H2S gas detector. The performance of the modified diatomite and leonardite for adsorption of H2S was compared. It was found that modified diatomite has better efficiency than modified leonardite for the adsorption of H2S gas. After modification process, the adsorption efficiency increased while the adsorption time decreased.



Edited by:

Ruangdet Wongla




W. Chomkitichai et al., "Adsorption of H2S Gas by Modified Diatomite and Leonardite", Applied Mechanics and Materials, Vol. 886, pp. 130-137, 2019

Online since:

January 2019




* - Corresponding Author

[1] H. Wu, Y. Zhu, S. Bian, J.H. Ko, S. Fong, Y. Li, Q. Xu, H2S adsorption by municipal solid waste incineration (MSWI) fly ash with heavy metals immobilization, Chemosphere. 195 (2018) 40–47.


[2] B. Bajaj, H.–I. Joh, S.M. Jo, J.H. Park, K.B. Yi, S. Lee. Enhanced reactive H2S adsorption using carbon nanofibers supported with Cu/CuxO nanoparticles, Appl. Surf. Sci. 429 (2018) 253–257.

[3] Z. Al–Qodah, W.K. Lafi, Z. Al–Anber, M. Al–Shannag, A. Harahsheh, Adsorption of methylene blue by acid and heat treated diatomaceous silica, Desalination 217 (2007) 212–224.


[4] A. Ausavasukhi, C. Kampoosaen, O. Kengnok, Adsorption characteristics of Congo red on carbonized leonardite, J. Clean. Prod. 134 (2016) 506–514.


[5] Y. Chammui, P. Sooksamiti, W. Naksata, S. Thiansem, O. Arqueropanyo, Removal of arsenic from aqueous solution by adsorption on leonardite, Chem. Eng. J. 240 (2014) 202–210.


[6] A. Terdputtakun, O.A. Arqueropanyo, S. Janhom, P. Sooksamiti, W. Naksata, Removal of arsenic from aqueous solution by adsorption on leonardite, International Journal of Environmental Science and Development 8(6) (2017) 393–398.


[7] P. Pookmanee, A. Wannawek, S. Satienperakul, R. Putharod, N. Laorodphan, S. Sangsrichan, S. Phanichphant, Characterization of diatomite, leonardite and pumice, Mater. Sci. Forum 872 (2016) 211–215.


[8] A.R. Rahmani, S. Jorfi, G. Asgari, F. Zamani, H. Almasi, A comparative study on the removal of pentachlorophenol using copper impregnated pumice and zeolite, J. Environ. Chem. Eng. 6 (2018) 3342–3348.


[9] A.A. Helal, G.A. Murad, A.A. Helal, Characterization of different humic materials by various analytical techniques, Arab. J. Chem. 4(1) (2011) 51–54.


[10] L. Pospišilova, N. Fasurova, 2009. Spectroscopic characteristics of humic acids originated in soils and lignite, Soil Water Res. 4(4) (2009) 168–175.


[11] B.J. Saikia, G. Parthasarathy, Fourier transform infrared spectroscopic characterization of kaolinite from Assam and Meghalaya, Northeastern India, Journal of Modern Physics 1(04) (2010) 206–210.


[12] S. Li, J. Hao, P. Ning, C. Wang, K. Li, L. Tang, X. Sun, D. Zhang, Y. Mei, Y. Wang, Preparation of Cu–Fe nanocomposites loaded diatomite and their excellent performance in simultaneous adsorption/oxidation of hydrogen sulfide and phosphine at low temperature, Sep. Purif. Technol. 180 (2017).


[13] M.A.M. Khraisheh, M.A. Al–Ghouti, S.J. Allen, M.N. Ahmad, Effect of OH and silanol groups in the removal of dyes from aqueous solution using diatomite, Water Res. 39 (2005) 922–932.


[14] D. Paules, S. Hamida, R.J. Lasheras, M. Escudero, D. Benouali, J.O. Cáceres, J. Anzano, Characterization of natural and treated diatomite by Laser–Induced Breakdown Spectroscopy (LIBS), Microchem. J. 137 (2018) 1–7.