Modified Bamboo Charcoal as a Bifunctional Material for Methylene Blue Removal
Qian Liu1, Wen-Yong Deng1, Lie-Yuan Zhang2
1Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China.
Materials (Basel, Switzerland)
|February 25, 2023
Summary
Modified bamboo charcoal effectively removes methylene blue dye. NaOH impregnation and magnetization significantly boost adsorption capacity and catalytic degradation efficiency, offering a sustainable solution for wastewater treatment.
Area of Science:
- Materials Science
- Environmental Chemistry
- Catalysis
Background:
- Wastewater contamination by dyes like methylene blue poses environmental risks.
- Bio-adsorbents offer a sustainable approach for pollutant removal.
- Developing efficient catalysts for dye degradation is crucial.
Purpose of the Study:
- To fabricate and evaluate modified bamboo charcoals as adsorbents and Fenton-like catalysts for methylene blue removal.
- To investigate the effects of NaOH impregnation and magnetization on bamboo charcoal properties and performance.
- To elucidate the synergistic mechanism between adsorption and catalytic degradation.
Main Methods:
- Preparation of raw bamboo charcoal (BC), NaOH-impregnated BC (BC-I), and magnetic BC (BC-IM).
- Characterization of surface area, pore size distribution, and functional groups.
- Adsorption experiments to determine methylene blue uptake capacity.
- Catalytic degradation experiments using H2O2 for Fenton-like reactions.
Main Results:
- NaOH impregnation increased specific surface area from 1.4 to 63.0 m²/g.
- Magnetization further enhanced surface area to 84.7 m²/g and enabled easy recycling.
- Maximum adsorption capacities at 328 K were 135.13, 220.26, and 497.51 mg/g for BC, BC-I, and BC-IM, respectively.
- Pseudo-first-order rate constants for catalytic degradation at 308 K were 0.198, 0.351, and 1.542 h⁻¹ for BC, BC-I, and BC-IM.
Conclusions:
- Modified bamboo charcoals exhibit superior performance in methylene blue removal compared to raw biochar.
- A synergistic mechanism involving adsorption and radical processes enhances degradation efficiency.
- These materials show promise for effective and recyclable wastewater treatment.
