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Modeling Cu removal from aqueous solution using sawdust based on response surface methodology.

Xiaoxue Jiang1, Loghman Mostafa2

  • 1School of Political Science and Law, Tibet University, Lhasa, 850000, China. 17708913278@163.com.

Environmental Monitoring and Assessment
|January 16, 2024
PubMed
Summary
This summary is machine-generated.

Sawdust effectively removes copper (Cu) from water, achieving 94% efficiency in low-concentration solutions. This natural adsorbent is a cost-effective solution for heavy metal water purification.

Keywords:
Central composite design modelCu concentrationsPollutionSawdust

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Area of Science:

  • Environmental Science
  • Water Treatment
  • Adsorption Technology

Background:

  • Copper (Cu) is a prevalent heavy metal pollutant in water resources due to industrial and agricultural activities.
  • Effective removal of copper from aqueous solutions is crucial for water purification and environmental protection.

Purpose of the Study:

  • To investigate the efficacy of sawdust as a natural adsorbent for removing copper (Cu) from aqueous solutions.
  • To optimize copper removal parameters using a central composite design (CCD) model.

Main Methods:

  • Sawdust (260-600 μm diameter) was used as an adsorbent after washing and drying.
  • Copper absorption experiments were conducted under varying initial Cu concentrations (1-25 mgl⁻¹), pH (2-10), contact time (5-185 min), and sawdust dosage (5-25 gl⁻¹).
  • Central composite design (CCD) was employed for experimental design and analysis; copper concentration was measured using atomic absorption spectroscopy.

Main Results:

  • The CCD model accurately predicted copper removal efficiency (R²=0.90, RSME=3.34%).
  • Pareto analysis indicated that contact time, sawdust amount, and pH significantly influenced copper removal.
  • High removal efficiency (94%) was achieved for copper from low-concentration solutions, demonstrating sawdust's effectiveness.

Conclusions:

  • Sawdust is a cost-effective and readily available natural adsorbent for removing copper from water.
  • Optimized conditions using sawdust can lead to highly efficient copper removal, particularly from dilute solutions.
  • The study recommends sawdust for targeting copper and other heavy metal contaminants in water treatment processes.