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Performance Evaluation and Optimization of Dyes Removal using Rice Bran-Based Magnetic Composite Adsorbent
Chih Ming Ma1, Gui Bing Hong2, Yi Kai Wang2
1Department of Cosmetic Application and Management, St. Mary's Junior College of Medicine, Nursing and Management, No. 100, Lane 265, San-Shing Rd., Sec. 2, San-Shing Shiang, YiLan 266, Taiwan.
Materials (Basel, Switzerland)
|June 24, 2020
Summary
This study developed a reusable rice bran/SnO2/Fe3O4 composite for removing reactive blue 4 and crystal violet dyes from water. The eco-friendly adsorbent shows high capacity and potential for sustainable wastewater treatment.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Agricultural waste valorization is crucial for sustainable development.
- Developing cost-effective and reusable adsorbents for dye removal is an environmental priority.
- Existing adsorbents often lack economic viability or reusability.
Purpose of the Study:
- To synthesize an environmentally friendly and economically viable adsorbent from rice bran, SnO2, and Fe3O4 nanoparticles.
- To evaluate the adsorption performance of the rice bran/SnO2/Fe3O4 composite for Reactive Blue 4 (RB4) and Crystal Violet (CV) dyes.
- To investigate the reusability and regeneration potential of the synthesized adsorbent.
Main Methods:
- Synthesis of rice bran/SnO2/Fe3O4 magnetic composites.
- Adsorption experiments for RB4 and CV dyes in aqueous solutions.
- Analysis of adsorption data using Langmuir isotherm and pseudo-second-order kinetic models.
- Optimization of dye removal using Response Surface Methodology (RSM).
Main Results:
- The rice bran/SnO2/Fe3O4 composite demonstrated high adsorption capacities for RB4 (218.82 mg/g) and CV (159.24 mg/g).
- Adsorption followed Langmuir isotherm and pseudo-second-order kinetics, indicating monolayer adsorption and chemisorption.
- Optimal conditions for 98% RB4 removal were achieved at pH 2.93, 60 °C, and 360 min.
- The composite exhibited excellent regeneration and reusability, outperforming other agricultural waste-based adsorbents.
Conclusions:
- The synthesized rice bran/SnO2/Fe3O4 composite is a highly promising, sustainable, and reusable adsorbent for efficient dye removal.
- The material's economic viability and high adsorption capacity make it suitable for practical environmental applications.
- This study highlights the potential of agricultural waste-derived magnetic composites in wastewater treatment and environmental protection.
