Synthesis and Characterization of TiO2/Ag Adsorbents for H2S Removal from Industrial Wastewater

Articles in Press

Document Type : Original Article

Authors

• Seyed Mahdi Rafiaei
• Mahdi Soleimani

Isfahan University of Technology

10.22067/jmme.2025.94024.1211

Abstract

In this study, TiO2/Ag particles were synthesized using a reduction method for significant removal of hydrogen sulfide gas from refinery wastewater. Also, the processed TiO2/Ag particles were characterized using various techniques such as XRD, SEM, FTIR, UV-Vis and DSC. The XRD analysis confirmed the fact that the synthesized materials have a tetragonal crystal lattice and the processed materials are free of any other phases and impurities. The results of SEM images showed that the size of the processed TiO2/Ag particles was mainly in the range of approximately 120 to 160 nm and had a uniform distribution. In addition, according to the results of the EDX-Map test, it was observed that various elements, including silver, were distributed with desirable quality in the synthesized materials. Thermal analysis of the synthesized materials up to 1000 ֯C showed that the peaks formed at temperatures of 47 and 310 ꞌC were related to the evaporation of surface water and the removal of organic phases, respectively, and about 1.5% of their weight was reduced. Finally, UV-Vis analysis showed that by using the synthesized absorbent materials, the light transmission rate from the wastewater increased to an acceptable level and, in fact, the wastewater was treated to an appropriate extent. This phenomenon is attributed to the reaction between Ag and H2S in the wastewater and the formation of Ag2S.

Keywords

• Refinery wastewater
• hydrogen sulfide
• TiO2
• TiO2/Ag

Main Subjects

• Synthesis of Materials

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