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- Title
Green synthesis of novel silver nanocomposite hydrogel based on sodium alginate as an efficient biosorbent for the dye wastewater treatment: prediction of isotherm and kinetic parameters.
- Authors
Karthiga Devi, G.; Senthil Kumar, P.; Sathish Kumar, K.
- Abstract
This paper is focused on simple, cost-effective and one-step green synthesis of silver nanocomposite hydrogel (SNC) based on sodium alginate toward the removal of methylene blue (MB) dye from aqueous solutions.Mukia maderaspatnaplant extract was used as a reducing agent and the reaction occurred at room temperature. The novel SNC was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electronic microscope (SEM), transmission electron microscope (TEM), thermogravimetric analysis (TGA), and X-ray diffraction (XRD) analyses. The FTIR results observed indicated the presence of silver ions in the inside of the hydrogel composite. The XRD results revealed that the SNC are crystalline in nature. It was observed from the TEM results that the particle size of Ag nanoparticles was around 19 nm. Furthermore, the prepared SNC was found to exhibit excellent adsorbent properties for the removal of MB dye from the aqueous solution. This has been experimentally studied through Langmuir, Freundlich, Redlich–Peterson, and Sips adsorption isotherms. The maximum Langmuir monolayer adsorption capacity was calculated as 213.7 mg of MB dye/g of SNC. The pseudo-first-order, pseudo-second-order, and Elovich kinetic models were used to fit the adsorption kinetics data. The prepared SNC can be effectively utilized for the removal of dyes from the industrial wastewater.
- Subjects
NANOCOMPOSITE materials; HYDROGELS; SODIUM alginate; WASTEWATER treatment; ATMOSPHERIC temperature; METHYLENE blue; FOURIER transform infrared spectroscopy; THERMOGRAVIMETRY
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 57, p27686
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2016.1178178