Preparation and characterization of a clam shell powder/carrageenan composite for methylene blue adsorption
- 1The University of Danang - University of Science and Education Danang Vietnam [email protected].
- 2The University of Danang - University of Technology and Education Danang Vietnam [email protected] [email protected] [email protected].
- 3Le Quy Don Technical University Ha Noi Vietnam [email protected].
Abstract
The valorization of biological by-products into sustainable adsorbents has gained significant attention as an effective approach for waste management and wastewater treatment. A carrageenan/clam shell powder (CSP@Car) composite was developed as a low-cost, environmentally friendly adsorbent with potential for dye removal from wastewater. The composite was successfully prepared and evaluated for its ability to adsorb methylene blue (MB) from aqueous solutions. FT-IR and PXRD analyses confirmed the physical combination of carrageenan (Car) and clam shell powder (CSP), while SEM observations indicated that CSP@Car-1 (CSP : Car = 0.05 : 1, w/w) exhibited the most porous microstructure. Compared to other composites, CSP@Car-1 demonstrated lower moisture content and water solubility, as well as the highest adsorption capacity. Batch adsorption experiments identified optimal conditions at room temperature, with an adsorption time of 2 hours, an adsorbent dosage of 10.0 g L⁻¹, an initial MB concentration of 80 mg L⁻¹, and pH approximately 7, resulting in a removal efficiency of 49.7% and an adsorption capacity of 401 mg g⁻¹. The adsorption process followed the pseudo-second-order kinetic model, and the equilibrium data were best described by the Langmuir isotherm model. Furthermore, CSP@Car-1 maintained adsorption activity after five adsorption-desorption cycles, although adsorption performance gradually decreased with repeated regeneration. These findings indicate that CSP@Car-1 is a promising low-cost and eco-friendly adsorbent for dye removal from wastewater, although further enhancement of its regeneration stability is necessary for practical applications.
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BibTeX
@article{van2026preparation,
title = {{Preparation and characterization of a clam shell powder/carrageenan composite for methylene blue adsorption}},
author = {Do Thi Thuy Van and Danthy Nguyen and Ngocbich Huynh and Minhdong Le and Chiuyen Phan},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra07910e},
url = {https://europepmc.org/article/PMC/PMC13717506},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Preparation and characterization of a clam shell powder/carrageenan composite for methylene blue adsorption
AU - Do Thi Thuy Van
AU - Danthy Nguyen
AU - Ngocbich Huynh
AU - Minhdong Le
AU - Chiuyen Phan
PY - 2026
DA - 2026/10/29
JO - RSC advances
DO - 10.1039/d6ra07910e
UR - https://europepmc.org/article/PMC/PMC13717506
AB - The valorization of biological by-products into sustainable adsorbents has gained significant attention as an effective approach for waste management and wastewater treatment. A carrageenan/clam shell powder (CSP@Car) composite was developed as a low-cost, environmentally friendly adsorbent with potential for dye removal from wastewater. The composite was successfully prepared and evaluated for its ability to adsorb methylene blue (MB) from aqueous solutions. FT-IR and PXRD analyses confirmed the physical combination of carrageenan (Car) and clam shell powder (CSP), while SEM observations indicated that CSP@Car-1 (CSP : Car = 0.05 : 1, w/w) exhibited the most porous microstructure. Compared to other composites, CSP@Car-1 demonstrated lower moisture content and water solubility, as well as the highest adsorption capacity. Batch adsorption experiments identified optimal conditions at room temperature, with an adsorption time of 2 hours, an adsorbent dosage of 10.0 g L⁻¹, an initial MB concentration of 80 mg L⁻¹, and pH approximately 7, resulting in a removal efficiency of 49.7% and an adsorption capacity of 401 mg g⁻¹. The adsorption process followed the pseudo-second-order kinetic model, and the equilibrium data were best described by the Langmuir isotherm model. Furthermore, CSP@Car-1 maintained adsorption activity after five adsorption-desorption cycles, although adsorption performance gradually decreased with repeated regeneration. These findings indicate that CSP@Car-1 is a promising low-cost and eco-friendly adsorbent for dye removal from wastewater, although further enhancement of its regeneration stability is necessary for practical applications.
SN - 2046-2069
ER -