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Separation of dye from aqueous solution by a new gravity compression and aeration system
Si Li1, Nana Xiong1, Guocheng Zhu1
1College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, People's Republic of China.
Environmental Technology
|June 22, 2022
Summary
A modified polyester fiber ball (MPFB) system effectively removes dye from industrial wastewater using gravity compression aeration. This filtration technology shows promise for treating large volumes of dye-contaminated water.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
- Materials Science
Background:
- Industrial wastewater often contains complex, hard-to-degrade dyes.
- Effective separation of suspended particles is crucial for water purification.
- Gravity compression filtration enhances separation efficiency.
Purpose of the Study:
- To evaluate a gravity compression aeration system using modified polyester fiber balls (MPFB) for dye separation from water.
- To optimize MPFB preparation and adsorption conditions for Congo red dye removal.
- To assess the adsorption kinetics and mechanism for dye wastewater treatment.
Main Methods:
- MPFB synthesized by adjusting alkali, β-cyclodextrin, temperature, and silane coupler concentrations.
- Characterization of MPFB using FTIR, SEM, and XPS.
- Adsorption experiments conducted with varying MPFB dose, pH, and aeration methods.
- Dye removal efficiency, adsorption capacity, and kinetics analyzed.
Main Results:
- MPFB preparation parameters significantly influenced dye separation.
- Optimal adsorption achieved at pH 8 with 48 g/L MPFB for 500 mg/L dye solution, reaching 100% removal.
- Maximum adsorption capacity reached 11.2 mg/g, following pseudo-first order kinetics and intraparticle diffusion.
- Circulation aeration yielded superior adsorption, dominated by electrostatic and hydrogen bonding interactions.
Conclusions:
- The gravity compression aeration system with MPFB is a promising technology for efficient dye wastewater treatment.
- Optimized MPFB and adsorption conditions ensure high dye removal rates.
- Understanding adsorption mechanisms aids in further system development for large-scale applications.
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