article · Journal of Hazardous Materials Advances
Chitosan-carbon nanotube hydrogel beads were synthesised and evaluated for the removal of three antibiotics, amoxicillin, ciprofloxacin, and sulfamethoxazole, from aqueous solutions at neutral pH. In single-contaminant tests, adsorption followed a non-linear pseudo-first-order kinetic model, achieving maximum capacities of 23.1 mg/g for amoxicillin, 23.7 mg/g for ciprofloxacin, and 25.17 mg/g for sulfamethoxazole. Rate-limiting analyses indicated that multiple processes govern overall uptake. When tested in binary and ternary mixtures, the adsorption data aligned with competitive extended Sips models, displaying both antagonistic and synergistic interactions among the co-existing antibiotics. Thermodynamic evaluations confirmed that the uptake of these pharmaceuticals is an endothermic process driven by a mixture of physical and chemical adsorption mechanisms. Overall, the hydrogel beads demonstrate potential as a green technology for treating antibiotic-contaminated water.
The presence of antibiotics in water sources fuels antimicrobial resistance, posing a severe threat to public health. Developing effective adsorption media such as chitosan-carbon nanotube hydrogels provides a targeted way to clean contaminated water bodies. Understanding how these materials behave when multiple pharmaceutical pollutants are present simultaneously helps guide the design of water purification techniques for complex real-world conditions.
This work represents early-stage laboratory research into green adsorbents for wastewater treatment. The material could eventually interest water treatment facilities, environmental remediation operators, or filtration equipment manufacturers seeking to eliminate pharmaceutical residues. However, because the study is limited to controlled bench-scale testing in aqueous solutions, significant further testing regarding scalability, regeneration, and real wastewater performance is required before commercial adoption.
AI-generated from the published abstract. Always read the original work before citing.
The removal of antibiotics in water receiving bodies is an integral part in eradicating antimicrobial resistance which has become a major threat to public health. Solid-liquid adsorption has demonstrated to be an effective technique in the removal of antibiotics from aqueous environments. Herein, chitosan-carbon nanotube (chitosan-CNT) hydrogel beads were synthesised for the adsorption of amoxicillin (AMX), ciprofloxacin (CIP) and sulfamethoxazole (SMX) from aqueous solution. Adsorption kinetics, isotherms and thermodynamic parameters were systematically investigated at a solution pH of 7. Single adsorption kinetics findings suggest that experimental data for AMX, CIP and SMX was better fitted by the nonlinear pseudo-first order model with calculated maximum adsorption capacities of 23.1 mg.g−1, 23.7 mg.g−1 and 25.17 mg.g−1, respectively. Moreover, findings from the Weber-Morris kinetic model suggest that multiple processes were limiting the overall adsorption rate of AMX, CIP and SMX on chitosan-CNT. Adsorption isotherm results indicated that single adsorption experimental data was better fitted by the nonlinear Freundlich isotherm model, while binary and ternary system experimental data were better fitted by the nonlinear competitive extended Sips adsorption isotherm models. Moreover, results for binary and ternary adsorption showed that multicomponent adsorption systems exhibited both antagonistic and synergistic adsorption of AMX, CIP and SMX. From the thermodynamics fundings, it was evident that the adsorption of AMX, CIP and SMX from solution is an endothermic process governed by both physical and chemical adsorption mechanisms. Based on the findings of the current study, it was concluded that chitosan-CNT has potential as a green technology for the removal of antibiotics from solution.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1016/j.hazadv.2024.100404
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.
