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<p>Leachate from urban landfills contains a complex mixture of organic contaminants and heavy metals, which makes it unsuitable for direct release into natural water bodies before preliminary treatment. The study's primary goal is to determine whether coconut shell activated carbon powder (CSACP) can effectively remove organic contaminants from landfill leachate through batch and isotherm adsorption experiments. The performance of CSACP was examined in a batch adsorption experiment using different shaking speeds and contact times ranging from 50 to 300&#xa0;rpm and contact times from 5 to 360&#xa0;min. The experiment's results demonstrated that the reduction effectiveness of COD and ammoniacal nitrogen (NH<sub>3</sub>-N) was enhanced by longer contact durations and higher shaking speeds (rpm). The removal efficiencies of COD and NH<sub>3</sub>-N using CSACP were 75% and 65% at a shaking speed of 200&#xa0;rpm, and 72% and 63% after 120&#xa0;min of contact time, respectively. Both COD and NH<sub>3</sub>-N were removed using CSACP with 75% and 65% efficiency at 200&#xa0;rpm and 72% and 63% efficiency after 120&#xa0;min, respectively. The respective adsorption capacity for each parameter was 5.129 and 0.3660 (mg/g). The isotherm study also demonstrated that, Langmuir fit the experimental results better than Freundlich, with values of 0.9981 and 0.9869 for COD and NH<sub>3</sub>-N. CSACP exhibited strong removal efficiency for landfill leachate treatment and shows potential as a sustainable, cost-effective, and efficient adsorbent for pollutant removal. Future investigations should focus on assessing adsorption kinetics, evaluating the material regeneration capacity, and conducting a cost–benefit analysis to support its applicability in real-scale treatment systems.</p>

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Batch and Isotherm Adsorption Study for Adsorption of Landfill Leachate Using Coconut Shell Activated Carbon Powder

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Amir Detho,
  • Aeslina Abdul Kadir,
  • Tariq Abdulsalam AlQubaysi,
  • Ahmed O. Alanazi,
  • Anwar Ahmed,
  • Tarek Salem Abdennaji,
  • Asif Ali Memon

摘要

Leachate from urban landfills contains a complex mixture of organic contaminants and heavy metals, which makes it unsuitable for direct release into natural water bodies before preliminary treatment. The study's primary goal is to determine whether coconut shell activated carbon powder (CSACP) can effectively remove organic contaminants from landfill leachate through batch and isotherm adsorption experiments. The performance of CSACP was examined in a batch adsorption experiment using different shaking speeds and contact times ranging from 50 to 300 rpm and contact times from 5 to 360 min. The experiment's results demonstrated that the reduction effectiveness of COD and ammoniacal nitrogen (NH3-N) was enhanced by longer contact durations and higher shaking speeds (rpm). The removal efficiencies of COD and NH3-N using CSACP were 75% and 65% at a shaking speed of 200 rpm, and 72% and 63% after 120 min of contact time, respectively. Both COD and NH3-N were removed using CSACP with 75% and 65% efficiency at 200 rpm and 72% and 63% efficiency after 120 min, respectively. The respective adsorption capacity for each parameter was 5.129 and 0.3660 (mg/g). The isotherm study also demonstrated that, Langmuir fit the experimental results better than Freundlich, with values of 0.9981 and 0.9869 for COD and NH3-N. CSACP exhibited strong removal efficiency for landfill leachate treatment and shows potential as a sustainable, cost-effective, and efficient adsorbent for pollutant removal. Future investigations should focus on assessing adsorption kinetics, evaluating the material regeneration capacity, and conducting a cost–benefit analysis to support its applicability in real-scale treatment systems.