article · Heliyon
Ultrasound-assisted adsorption using a zirconium(IV)-based metal-organic framework, UiO-66-NH2, offers an effective method for removing organic dyes from real water samples. The process targets three specific dyes: methylene blue, malachite green, and congo red. Structural, elemental, thermal, and morphological characterisation of the material confirmed its features prior to performance testing. Across varied experimental parameters including adsorbent dose, contact time, temperature, pH, and initial dye concentrations, maximum adsorption capacities reached 938 mg per gram for methylene blue, 587 mg per gram for malachite green, and 623 mg per gram for congo red. The uptake occurs via an endothermic monolayer chemisorption mechanism following pseudo-second-order kinetics. Regeneration tests demonstrated that the framework maintains its adsorption performance across three consecutive cycles without substantial loss of efficiency, providing a potential strategy for water decontamination and environmental protection.
Synthetic dye pollution poses a serious threat to water quality and natural ecosystems. Finding reusable, high-capacity adsorbents that work efficiently in real water conditions is critical for environmental remediation. Demonstrating that UiO-66-NH2 effectively captures multiple classes of dyes using ultrasound assistance and retains performance across multiple operational cycles highlights a practical method for treating contaminated water supplies.
This technology is relevant to industrial wastewater treatment facilities and water remediation operators seeking methods to capture organic dyes. The work demonstrates effective removal in real water samples and confirms material reusability over three cycles. Because the evaluation remains at laboratory scale with small-scale batch conditions, the technology appears to be applied and tested early-stage research requiring pilot-scale validation and cost-benefit assessments before industrial adoption.
AI-generated from the published abstract. Always read the original work before citing.
The utilization of dye adsorption through metal-organic frameworks represents an eco-friendly and highly effective approach in real water treatment. Here, ultrasound assisted adsorption approach was employed for the remediation of three dyes including methylene blue (MB), malachite green (MG), and congo red (CR) from real water samples using zirconium(IV)-based adsorbent (UiO-66-NH 2 ). The adsorbent was characterized for structural, elemental, thermal and morphological features through XRD, XPS, FTIR, thermogravimetric analysis, SEM, BET , and Raman spectroscopy. The adsorption capacity of adsorbent to uptake the pollutants in aqueous solutions was investigated under different experimental conditions such as amount of UiO-66-NH 2 at various contact durations, temperatures, pH levels, and initial dye loading amounts. The maximum removal of dyes under optimal conditions was found to be 938, 587, and 623 mg g −1 towardMB, MG, and CR, respectively. The adsorption of the studied dyes on the adsorbent surface was found to be a monolayer and endothermic process. The probable mechanism for the adsorption was chemisorption and follows pseudo-second-order kinetics. From the findings of regeneration studies, it was deduced that the adsorbent can be effectively used for three consecutive cycles without any momentous loss in its adsorption efficacy. Furthermore, UiO-66-NH 2 with ultrasound-assisted adsorption might help to safeguard the environment and to develop new strategies for sustainability of natural resources.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1016/j.heliyon.2023.e22001
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.
