AI Article Synopsis
- A novel chitosan-based magnetic composite (CTS@SnO@FeO) was developed to efficiently adsorb the anionic dye, RBR, from water using a water-in-oil emulsification method.
- The composite was characterized through various techniques, and it demonstrated significantly better adsorption of RBR compared to another composite (CTS@FeO), achieving a high capacity of 981.23 mg/g at pH 2, indicating the beneficial role of SnO in enhancing adsorption.
- The adsorption process was found to follow specific kinetic and isotherm models, with mechanisms involving the chelation between N atoms in the composite and RBR ions, and the material showcased easy magnetic separation and excellent reusability after multiple cycles.
Article Abstract
A novel chitosan-based magnetic composite CTS@SnO@FeO was prepared by water-in-oil emulsification for adsorbing anionic dye RBR in aqueous solution. The physicochemical properties of the obtained material were characterized by FTIR, XRD, VSM, TGA, SEM and N adsorption-desorption. Effects of contact time, solution pH, ionic strength, initial dye concentration and temperature on the adsorption of reactive brilliant red (RBR) were investigated via batch adsorption experiments. Compared with CTS@FeO, CTS@SnO@FeO showed better adsorption performance for RBR, represented by the adsorption capacity reaching a maximum of 981.23 mg/g at pH 2, illustrating that the introduction of SnO was beneficial for adsorption. The kinetic data and equilibrium adsorption behaviors were well depicted by pesudo-second-order kinetic model and Langmuir isotherm model, respectively. Evaluation of the thermodynamic parameters revealed that the adsorption process was spontaneous and endothermic. XPS analysis confirmed a potential adsorption mechanism that the N atoms on composite chelated with RBR ions in solution. In addition, CTS@SnO@FeO particles were easy to be magnetically separated and had outstanding reusability after five times recycling. All in all, CTS@SnO@FeO was proven to be an efficient and promising adsorbent for the dye removal due to its higher adsorption capacity compared with other adsorbents.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ijbiomac.2019.11.194 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spontaneous Catalytic Reaction of a Surfactant in the Interfacial Microenvironment of Colloidal Gold Nanoparticles.
J Am Chem Soc
January 2025
State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Center for Marine Environmental Chemistry and Toxicology, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
The performance of nanomaterials is significantly determined by the interfacial microenvironment, in which a surfactant plays an essential role as the adsorbent, but its involvement in the interfacial reaction is often overlooked. Here, it was discovered that citrate and ascorbic acid, the two primarily used surfactants for colloidal gold nanoparticles (Au NPs), can spontaneously undergo catalytic reaction with trace-level nitrogenous residue under ambient environment to form oxime, which is subsequently cleaved to generate CN or a compound containing the -CN group. Such a catalytic reaction shows wide universality in both reactants, including various carbonaceous and nitrogenous sources, and metal catalysts, including Au, Ag, Fe, Cu, Ni, Pt, and Pd NPs.
View Article and Find Full Text PDFComparative analysis of hospital laboratory wastewater treatment techniques in Syrian Arab Republic.
East Mediterr Health J
December 2024
Department of Basic Sciences, Faculty of Civil Engineering, University of Aleppo, Aleppo, Syria.
Background: Hospital wastewater poses a significant threat to human health due to the presence of difficult-to-degrade organic compounds, active pharmaceutical ingredients and multiple inorganic substances that can pollute water resources and ecosystems.
Aim: To compare the effectiveness of different techniques for removing organic load from hospital laboratory wastewater in Aleppo, Syria.
Methods: We treated wastewater samples from hospital laboratories at Aleppo University Hospital, Syria, using several techniques, including biological treatment with the rotating biological contactor, adsorption with Syrian natural clay, coagulation with aluminium sulphate, advanced oxidation with ultrasound, and a combined treatment using natural clay and ultrasound.
Adsorption Structure and Selectivity of Phenols in Water-Immersed Organomontmorillonite Investigated by Molecular Simulation.
Langmuir
January 2025
Department of Environmental Chemistry and Chemical Engineering, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Tokyo, Hachioji 192-0015, Japan.
The two-dimensional interlayer space of layered materials has been highlighted due to their adsorption property, whose nanostructure in the water-immersed state is scarcely understood by experiment. Recent developments in molecular simulation have enabled researchers to investigate the interlayer structure, but water content is necessary for accurate modeling. In the present study, we proposed a theoretical method to estimate the saturated water content and adsorption selectivity of trichlorophenol and phenol in montmorillonite modified with hexadecyltrimethylammonium ions.
View Article and Find Full Text PDFQuantitative Estimation of Effective Brønsted Acid Sites of Silica-Supported HSiWO Heteropoly Acid for Adsorption of Various Molecules.
Langmuir
January 2025
Institute for Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
The amount of incorporation of linear alcohols and ethers in HSiWO·6HO (HSiW·6HO, 50 wt %) supported on silica (SiO) was estimated by a conventional volumetric method and infrared (IR) spectroscopy, and the state of involved molecules was elucidated. First, the attribution of the key IR band at 2200 cm, which was observed for the water of crystallization of HSiW·6HO, to HO species (protons) was verified by coincident observation of thermogravimetric-differential thermal analysis, X-ray diffraction (XRD), and IR spectroscopy during thermal treatment in addition to the isotope exchange with DO. The 2200 cm band was gradually decreased in intensity by increasing the amount of adsorption of pyridine and was totally consumed at saturation, while the volumetric method provided the accurate number of included pyridine molecules.
View Article and Find Full Text PDFLow-temperature oxidation of ethanol to acetaldehyde over Mo-based catalysts.
RSC Adv
January 2025
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences Taiyuan 030001 China
The research and development of the green synthesis route of chemicals has become the focus of research in academia and industry. At present, the highly efficient oxidation of ethanol to acetaldehyde over non-precious metal catalysts under mild conditions is most promising, but remains a big challenge. Herein, the Mo-Sn oxide catalyst was designed to successfully realize low-temperature oxidation of ethanol to acetaldehyde, achieving an acetaldehyde selectivity of 89.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!