Related Experiment Video
Updated: Sep 2, 2025
08:01
Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
Published on: June 28, 2019
7.6K
Cellulose-based aerogel beads for efficient adsorption- reduction- sequestration of Cr(VI)
Meng Li1, Chunxia Tang1, Shaohai Fu1
1Key Laboratory of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, China.
International Journal of Biological Macromolecules
|August 1, 2022
Summary
Amine functionalized cellulose-based aerogel beads (CGP) efficiently remove toxic hexavalent chromium (Cr(VI)) from water in a single step. This novel material demonstrates high adsorption capacity and stable immobilization, offering a promising solution for wastewater treatment.
Area of Science:
- Environmental Science
- Materials Science
- Chemistry
Background:
- Hexavalent chromium (Cr(VI)) poses significant environmental risks due to its toxicity.
- Effective methods for Cr(VI) reduction and sequestration in aqueous solutions are crucial for environmental remediation.
- Existing methods may involve multiple steps or lack efficiency in simultaneous removal and stabilization.
Purpose of the Study:
- To develop and evaluate amine functionalized cellulose-based aerogel beads (CGP) for the simultaneous adsorption, reduction, and sequestration of Cr(VI).
- To investigate the adsorption capacity, mechanism, and stability of CGP for Cr(VI) removal.
- To assess the practical applicability of CGP in wastewater treatment.
Main Methods:
- Synthesis of amine functionalized cellulose-based aerogel beads (CGP).
- Batch adsorption experiments to determine Cr(VI) adsorption capacity and evaluate the effects of pH, temperature, ionic strength, and interfering ions.
- Analysis of adsorption kinetics, XPS, and FTIR spectra to elucidate the removal mechanism.
- Evaluation of Cr immobilization stability under various pH conditions.
- Fixed-bed column adsorption studies for wastewater treatment simulation.
Main Results:
- CGP exhibited a high maximum Cr(VI) adsorption capacity of 386.40 mg/g at 25 °C, attributed to strong electrostatic attraction.
- The material demonstrated efficient simultaneous adsorption-reduction-sequestration of Cr(VI) across a wide concentration range.
- XPS and FTIR analyses provided insights into the Cr(VI) removal mechanism.
- CGP showed stable Cr immobilization under simulated neutral, acidic, and alkaline conditions.
- Batch and fixed-bed column studies confirmed the material's performance and potential for wastewater treatment.
Conclusions:
- Amine functionalized cellulose-based aerogel beads (CGP) are highly effective for the one-step removal of toxic Cr(VI) from aqueous solutions.
- CGP offers superior adsorption capacity and stable sequestration of Cr(VI), addressing key environmental concerns.
- The developed material shows significant potential for practical application in industrial wastewater treatment processes.
