In this study, chitosan/alginate-based adsorbent composites were successfully developed using activated carbon derived from tannery waste (ACTW) through a gelation method. The primary objective was to evaluate the performance of these composites in removing Remazol Brilliant Blue R (RBBR), a common anionic textile dye, from aqueous solutions. The addition of ACTW significantly enhanced the composite’s adsorption capacity, with the maximum equilibrium adsorption capacity reaching 300.96 mg/g—1.2 times higher than the theoretically expected value based on simple additive effects. This enhancement is attributed to a synergistic interaction between chitosan, sodium alginate, and ACTW, which reduces steric hindrance and increases accessibility to active adsorption sites. Scanning electron microscopy (SEM) revealed that the surface morphology evolved from smooth (AC00) to rougher and more porous (AC30), indicating improved textural properties due to the incorporation of porous ACTW. BET analysis confirmed a substantial increase in specific surface area—from 2.6 m²/g for AC00 to 48.56 m²/g for AC30—with total pore volume rising from 0.0045 cm³/g to 0.0404 cm³/g. The pore size distribution showed dominance of micropores (<20 Å) and mesopores (20–500 Å), which are favorable for dye molecule diffusion and retention. The adsorption behavior followed Langmuir-type isotherms, particularly for composites with higher ACTW content (AC20 and AC30), suggesting monolayer adsorption on homogeneous surfaces. However, the Liu model provided the best fit for all composites, indicating heterogeneous adsorption with varying site energies. The thermodynamic analysis revealed that the adsorption process was spontaneous (ΔG° < 0), exothermic (ΔH° < 0), and entropy-driven (ΔS° > 0), implying physical adsorption dominated by van der Waals forces. Kinetic studies indicated that the Elovich model best described the adsorption process, reflecting a heterogeneous surface and decreasing adsorption rate over time due to site saturation.ApoE Antibody Epigenetic Reader Domain Importantly, the composite demonstrated excellent reusability: after ten consecutive adsorption-desorption cycles using 0.05 mol/L NaOH, it retained over 70% of its initial removal efficiency, confirming its robustness and potential for practical application.TSFM Antibody medchemexpress
This research highlights the feasibility of upcycling tannery waste into high-performance adsorbents for wastewater treatment.PMID:35167390 The developed composite not only outperforms conventional materials in dye removal but also contributes to sustainable waste management. By combining biopolymers with waste-derived activated carbon, the material offers a cost-effective, eco-friendly solution for advanced treatment of textile effluents, addressing both environmental pollution and resource recovery challenges.MedChemExpress (MCE) offers a wide range of high-quality research chemicals and biochemicals (novel life-science reagents, reference compounds and natural compounds) for scientific use. We have professionally experienced and friendly staff to meet your needs. We are a competent and trustworthy partner for your research and scientific projects.Related websites: https://www.medchemexpress.com