Preparation and Characterization of Sulfonic Acid Functionalized Activated Carbon for Applications in Water and Wastewater Treatment

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7th World Congress on Civil, Structural, and Environmental Engineering, CSEE 2022, Virtual, Online, 10 - 12 April 2022 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.11159/iceptp22.201
  • City: Virtual, Online
  • Keywords: Activated carbon, adsorption, characterization, modification, sulfonic acid
  • Kayseri University Affiliated: No


© 2022, Avestia Publishing. All rights reserved.Activated carbon (AC) has been considered one of the oldest and most widely used adsorbents for the removal of organic and inorganic pollutants in water and wastewater treatment. The physical and chemical structure of AC can be altered by various modification methods, especially to improve the treatment performance for specific pollutants. The modification can be classified into three categories namely, chemical, physical and biological which are further subdivided into their related treatment techniques (such as acidic, basic, heat etc.). The aim of this study is to modification and characterization of the original powder activated carbon (PAC) with sulfonic acid. Original AC and modified AC characterization analysis were performed based on morphological properties, pore size distributions and structural properties such as scanning electron microscope (SEM), brunauer–emmett–teller (BET), fourier transform infrared spectrophotometer (FTIR) and dynamic light scattering (DLS). The sulfonic acid modification method was effective in alteration the porous structure and surface properties of PAC. As a result of the sulfonic acid modification, the BET surface area increased from 273.56 m2/g to 868.48 m2/g. It was observed that AC-S had lower pHPZC values than the original adsorbent. In the FTIR spectrum of ACS adsorbent, it was observed that 1993.6 cm-1 band was added to the structure, unlike the original AC. This peak indicates S=O groups and SO3H group, which indicates that the AC surface is functionalized with sulfonic groups. Overall, the results showed that sulfonic acid functionalized activated carbon can be used effectively in adsorption studies depending on the properties of the targeted pollutants.