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<p>Hydrocarbon contamination from petroleum-related activities poses significant risks to aquatic ecosystems and human health. This study evaluates the adsorption removal of diesel from aqueous solutions using two abundant Algerian natural geological materials: Oued Souf sand and Hassi Messaoud clay. Batch adsorption experiments were conducted at initial diesel concentrations ranging from 50 to 500&#xa0;mg/L under near-neutral pH conditions, using 1&#xa0;g of adsorbent per 100 mL of solution and contact times up to 60&#xa0;min. Adsorption performance was assessed through UV–Visible spectrophotometric analysis, removal efficiency, and adsorption capacity calculations. The results demonstrated high adsorption efficiencies for both materials, with Hassi Messaoud clay exhibiting superior performance. Average removal efficiencies reached 96.55% for clay and 95.05% for sand, while maximum adsorption capacities were 47.805 and 45.285&#xa0;mg/g, respectively. Kinetic studies revealed that the pseudo-first-order model best described the adsorption process, indicating rapid surface adsorption, whereas equilibrium data were better fitted by the Freundlich isotherm, suggesting heterogeneous adsorption behavior. These findings highlight the potential of locally available Algerian geological materials, particularly Hassi Messaoud clay, as efficient, sustainable, and low-cost adsorbents for the treatment of hydrocarbon-contaminated water.</p>

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Removal of diesel hydrocarbons from contaminated water using natural Algerian geological materials: adsorption performance, kinetics and isotherm analysis

  • 期刊论文

  • 发表日期：

    2026年7月17日

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  • Abdeslam Boughzel,
  • Omar Ben Mya,
  • Rayane Dhif,
  • Walaa Rahal

摘要

Hydrocarbon contamination from petroleum-related activities poses significant risks to aquatic ecosystems and human health. This study evaluates the adsorption removal of diesel from aqueous solutions using two abundant Algerian natural geological materials: Oued Souf sand and Hassi Messaoud clay. Batch adsorption experiments were conducted at initial diesel concentrations ranging from 50 to 500 mg/L under near-neutral pH conditions, using 1 g of adsorbent per 100 mL of solution and contact times up to 60 min. Adsorption performance was assessed through UV–Visible spectrophotometric analysis, removal efficiency, and adsorption capacity calculations. The results demonstrated high adsorption efficiencies for both materials, with Hassi Messaoud clay exhibiting superior performance. Average removal efficiencies reached 96.55% for clay and 95.05% for sand, while maximum adsorption capacities were 47.805 and 45.285 mg/g, respectively. Kinetic studies revealed that the pseudo-first-order model best described the adsorption process, indicating rapid surface adsorption, whereas equilibrium data were better fitted by the Freundlich isotherm, suggesting heterogeneous adsorption behavior. These findings highlight the potential of locally available Algerian geological materials, particularly Hassi Messaoud clay, as efficient, sustainable, and low-cost adsorbents for the treatment of hydrocarbon-contaminated water.