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Color removal from acid and reactive dye solutions by electrocoagulation and electrocoagulation/adsorption processes.
S Bellebia1, S Kacha, Z Bouberka
1Laboratory of Materials and Reactive Systems, University of Djillali Liabes, Sidi Bel Abbes, Algeria.
Summary
This study combined electrocoagulation and activated carbon adsorption to remove acid and reactive dyes from water. The optimized process effectively treated dye concentrations, offering a cost-effective solution for wastewater treatment.
Area of Science:
- Environmental Chemistry
- Water Treatment Technologies
- Applied Electrochemistry
Background:
- Industrial wastewater often contains recalcitrant acid and reactive dyes.
- Effective dye removal is crucial for preventing water pollution.
- Conventional treatment methods can be energy-intensive and costly.
Purpose of the Study:
- To investigate the efficacy of electrocoagulation and adsorption for removing specific dyes.
- To determine optimal operating parameters for a combined dye removal process.
- To evaluate the cost-effectiveness of the proposed treatment method.
Main Methods:
- Electrocoagulation using aluminum electrodes.
- Adsorption using granular activated carbon (GAC).
- Systematic examination of parameters: current density, loading charge, pH, conductivity, stirring velocity, contact time, and GAC concentration.
Main Results:
- Optimal electrocoagulation loading charges determined for reactive (7.46 F/m3) and acid dyes (1.49 F/m3) at 200 mg/L.
- Complete removal of residual reactive dye achieved with 700 mg/L GAC.
- Demonstrated feasibility of a combined electrocoagulation-adsorption process.
Conclusions:
- The combined electrocoagulation and GAC adsorption process is effective for removing significant concentrations of recalcitrant dyes.
- The method offers a cost-effective approach by utilizing moderate energy and material consumption.
- Provides valuable data for developing sustainable industrial wastewater treatment strategies.
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