Abstract
This study introduces a cost-effective approach to fabricating a porous and ionically surface-modified biochar-based alginate polymer networks composite (SBPC) through air drying. The study critically analyzes the role and concentrations of various components in the success of SBPC. Characterization techniques were employed to evaluate the microstructure and adsorption mechanism, confirming the ability of the adsorbent’s carboxyl and hydroxyl groups to eliminate various heavy metal ions in water simultaneously. The SBPC demonstrated high copper binding capacities (937.4 mg/g and 823.2 mg/g) through response surface methodology (RSM) and column studies. It was also influential in single and natural systems, exhibiting competitive behavior and efficient removal of Cu2+. The Langmuir isotherm and pseudo-second-order kinetics strongly correlate with experimental data, with R2 values of 0.98 and 0.99, respectively. SBPC showed remarkable stability, up to 10 desorption cycles, and achieved 98% Cu2+ adsorption efficiency and 91.0% desorption. Finally, the cost analysis showed a cost of 125.68 INR/kg or 1.51 USD/kg, which is very low compared to the literature. These results highlight the potential of SPBC and show that it provides an efficient and cost-effective solution for removing Cu2+ from a real system.
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Acknowledgements
The authors are thankful to HBL Power Systems Ltd., Hyderabad, India for their financial support. The authors also extend their appreciation to BITS Pilani Hyderabad Campus for facilitating this project.
To be represented in International Conference on Energy Transition: Challenges and Opportunities at Chemical Engineering Congress (CHEMCON-2023) – On the occasion of Platinum Jubilee Year of Indian Institute of Chemical Engineer December 27 to December 30, 2023, in association with Rajiv Gandhi Institute of Petroleum Technology, Jais, Jadavpur University and Heritage Institute of Technology. (Organizing Chairman: Prof. A. S. K. Sinha, Director, RGIPT).
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Sources of funding declared- CSIR under the scheme 22(0783)/19/EMR-II. Recipient: I. Sreedhar.
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Sadamanti Sireesha: investigation, data curation, methodology, analysis, characterization of samples, and writing the original draft. I. Sreedhar: project mentoring and monitoring.
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Sireesha, S., Sreedhar, I. Unleashing the potential of Cajanus cajun biochar polymer composite for Cu (II) removal: mechanism, modification, and application. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33551-z
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DOI: https://doi.org/10.1007/s11356-024-33551-z