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Purification and Visualization of Lipopolysaccharide from Gram-negative Bacteria by Hot Aqueous-phenol Extraction
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Phenol removal from aqueous solution using Citrullus colocynthis waste ash.

Mehdi Qasemi1, Mojtaba Afsharnia1, Ahmad Zarei1

  • 1Department of Environmental Health Engineering, Faculty of Health, Gonabad University of Medical Sciences, Gonabad, Iran.

Data in Brief
|June 15, 2018
PubMed
Summary

Citrullus colocynthis waste ash effectively removes hazardous phenol through adsorption. This low-cost, natural adsorbent demonstrates high capacity and spontaneous, endothermic removal, making it a viable environmental solution.

Keywords:
AdsorptionCitrullus colocynthisPhenolThermodynamicWater

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Area of Science:

  • Environmental Science
  • Materials Science
  • Chemical Engineering

Background:

  • Phenol is a hazardous organic pollutant from industrial and pharmaceutical activities.
  • Effective phenol removal requires low-cost adsorbents for environmental remediation.
  • Citrullus colocynthis waste ash presents a potential natural adsorbent material.

Purpose of the Study:

  • To evaluate Citrullus colocynthis waste ash as a natural, low-cost adsorbent for phenol removal.
  • To investigate the adsorption mechanism, thermodynamics, and kinetics of phenol onto the ash.
  • To determine the maximum adsorption capacity of the adsorbent for phenol.

Main Methods:

  • Characterization of Citrullus colocynthis waste ash composition (SiO2, Al2O3, MgO).
  • Batch adsorption experiments varying adsorbent dose, pH, and initial phenol concentration.
  • Analysis of adsorption kinetics, isotherms, and thermodynamic parameters (ΔH°, ΔS°, ΔG°).

Main Results:

  • Phenol adsorption reached 70% within 30 minutes.
  • Adsorption efficiency increased with adsorbent dose and decreased pH.
  • Maximum adsorption capacity was 173.2 mg/g, indicating multilayer adsorption.
  • Thermodynamic data confirmed a spontaneous, endothermic adsorption process with high affinity.

Conclusions:

  • Citrullus colocynthis waste ash is a highly effective and economical adsorbent for phenol removal.
  • The adsorption process is spontaneous, endothermic, and follows chemisorption kinetics.
  • This natural adsorbent offers a promising solution for industrial wastewater treatment and environmental protection.