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Multifunctional self-assembled adsorption microspheres based on waste bamboo shoot shells for multi-pollutant water
Jie Yang1, Qianxin Long1, Yan Zhu1
1Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education & Guangxi Key Laboratory of Information Materials & School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China.
Multifunctional bamboo shoot shell biochar microspheres effectively purify polluted water by adsorbing heavy metals like Palladium(II) and Silver(I), antibiotics, and dyes. This sustainable adsorbent offers a low-cost solution for wastewater treatment and resource recovery.
Area of Science:
- Materials Science
- Environmental Science
- Nanotechnology
Background:
- Wastewater often contains a complex mixture of pollutants including heavy metals, antibiotics, and dyes.
- Developing efficient, selective, and cost-effective adsorbents is crucial for environmental remediation.
- Valorization of waste materials like bamboo shoot shells into functional adsorbents is an area of active research.
Purpose of the Study:
- To prepare multilayer self-assembled multifunctional bamboo shoot shell biochar microspheres (BSSBM).
- To investigate the adsorption performance of BSSBM for heavy metals (Ag(I), Pd(II)), antibiotics (Tetracycline), and dyes (Methylene Blue).
- To evaluate the selectivity and potential application of BSSBM in real polluted water treatment.
Main Methods:
- Fabrication of BSSBM using bamboo shoot shell biochar as a carrier, titanium dioxide as an intermediate medium, and chitosan as an adhesion layer.
- Systematic analysis of adsorption behavior, including adsorption capacity, kinetics, and selectivity.
- Testing BSSBM performance in a multi-ion coexistence system and simulated polluted water.
Main Results:
- BSSBM exhibited high adsorption capacities: 417.3 mg/g for Pd(II), 222.5 mg/g for Ag(I), 97.2 mg/g for Tetracycline, and 42.9 mg/g for Methylene Blue.
- Adsorption kinetics followed pseudo-first order for Pd(II), MB, and TC, and pseudo-second order for Ag(I).
- BSSBM demonstrated remarkable selectivity for Ag(I) and Pd(II) in a mixed-ion system.
Conclusions:
- BSSBM is a promising, low-cost, and renewable multifunctional adsorbent for treating multi-polluted water.
- The material facilitates the high value-added utilization of waste bamboo shoot shells.
- BSSBM shows potential for efficient removal of target pollutants and recovery of precious metals.
