article · Applied Surface Science Advances
Four solid nano-adsorbents were synthesised using nanohydroxyapatite derived from sea scallop shells, potassium kappa-carrageenan, and calcium alginate. Among these materials, the triple biocomposite beads demonstrated a high specific surface area of 722.62 square metres per gram, small particle size of 26 nanometres, thermal stability, and a low swelling ratio of 0.3 percent. Testing for the removal of methylene blue dye from wastewater under various conditions revealed that the triple biocomposite achieved a maximum adsorption capacity of 529.1 milligrams per gram. The uptake process was determined to be spontaneous, endothermic, and physical in nature, showing close agreement with standard adsorption isotherms and kinetic models. Regeneration experiments demonstrated that one molar hydrochloric acid effectively desorbed the dye, achieving an efficiency of approximately 86 percent.
Industrial wastewater containing synthetic dyes poses environmental risks if released without treatment. Utilising bio-derived components and seafood by-products such as sea scallop shells provides a method to fabricate functional solid adsorbents. Achieving high pollutant uptake alongside good desorption efficiency demonstrates how renewable and recycled materials can contribute to wastewater remediation strategies.
The material could enable cleaner effluent management for industrial operators discharging dye-contaminated wastewater. Industrial treatment facilities and environmental remediation firms are potential users of such solid adsorbents. Based on the reported laboratory synthesis, batch adsorption, and chemical desorption trials, this work is at an early experimental stage and requires testing in continuous flow systems and real industrial effluents to determine practical feasibility.
AI-generated from the published abstract. Always read the original work before citing.
In this work, four nano-solid adsorbents were synthesized namely: nanohydroxyapatite based on sea scallop shells (NHAP), potassium kappa-carrageenan (KG), potassium kappa-carrageenan/nanohydroxyapatite (KPC), and potassium kappa-carrageenan/calcium alginate/nanohydroxyapatite as triple biocomposite (TBC) beads. These fabricated materials were used as solid adsorbents for methylene blue removal from wastewater under different conditions. Based on our experimental results, TBC particles were characterized by higher specific surface area (722.62 m2/g), mesoporosity (pore radius, 3.77 nm), smaller particle size (TEM particle size, 26 nm), the presence of abundant chemical functional groups, thermal stability, and lower swelling ratio (0.3%). TBC exhibited the maximum adsorption capacity (529.1 mg/g) towards methylene blue (MB) with endothermic, spontaneous, favorable, and physical adsorption process as reported by thermodynamic studies. Adsorption of MB fits well Freundlich, Langmuir, Dubinin-Radushkevich, and Temkin adsorption models with correlation coefficients reached about 0.9999. MB adsorption onto all the solid adsorbents shows the good suitability of Elovich and pseudo-second order kinetic models. Desorption investigation proves that hydrochloric acid (1 mol/L) is the most suitable desorbing agent with desorption efficiency that reached about 86%.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1016/j.apsadv.2023.100388
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
