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Ammonia (NH3) emissions from various agricultural and industrial activities pose significant environmental and health concerns, necessitating effective removal methods. This study focuses on utilizing waste materials, specifically fly ash (FA) derived from sugarcane bagasse incineration, combined with bamboo hydrochar (BH) or red mud (RM), for NH3 adsorption. The FA was physically activated to enhance its porosity and surface area, while BH and RM were incorporated to improve NH3 adsorption capabilities. The adsorbents were characterized using SEM and BET surface analysis. NH3 adsorption experiments were conducted, revealing that AFA-BH exhibited the highest adsorption capacity at 0.84 mL-NH3/g-adsorbent, attributed to chemical adsorption facilitated by functional groups in BH. AFA-RM also demonstrated significant NH3 adsorption at 0.75 mL-NH3/g-adsorbent due to the presence of iron oxide in RM. Steam activation increased micropore volume and specific surface area, enhancing NH3 adsorption of FA. This research offers a low-cost and environmentally friendly approach to NH3 removal, utilizing waste materials and avoiding chemical modifications.

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Surface-Modified Synthesis of Low-Cost Adsorbents Derived from Fly Ash for Removing Ammonia

  • 会议论文

  • 发表日期：

    2025年

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  • Tulakarn Ketwong,
  • Natchapon Cholwatthanatanakorn,
  • Chinnathan Areeprasert

摘要

Ammonia (NH3) emissions from various agricultural and industrial activities pose significant environmental and health concerns, necessitating effective removal methods. This study focuses on utilizing waste materials, specifically fly ash (FA) derived from sugarcane bagasse incineration, combined with bamboo hydrochar (BH) or red mud (RM), for NH3 adsorption. The FA was physically activated to enhance its porosity and surface area, while BH and RM were incorporated to improve NH3 adsorption capabilities. The adsorbents were characterized using SEM and BET surface analysis. NH3 adsorption experiments were conducted, revealing that AFA-BH exhibited the highest adsorption capacity at 0.84 mL-NH3/g-adsorbent, attributed to chemical adsorption facilitated by functional groups in BH. AFA-RM also demonstrated significant NH3 adsorption at 0.75 mL-NH3/g-adsorbent due to the presence of iron oxide in RM. Steam activation increased micropore volume and specific surface area, enhancing NH3 adsorption of FA. This research offers a low-cost and environmentally friendly approach to NH3 removal, utilizing waste materials and avoiding chemical modifications.