کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4982064 | 1453848 | 2017 | 11 صفحه PDF | دانلود رایگان |
- Poly(ethylenimine)-functionalized nanopyroxene were synthesized successfully by hydrothermal technique.
- The PEI-PNPs were used for adsorptive removal of dye from textile wastewater.
- External mass transfer diffusion and Sips models were used for describing the adsorption.
In this study, polyethylenimine-functionalized pyroxene nanoparticles were successfully prepared in-house for the removal of commercial red dye (CRD) from an industrial wastewater. The functionalization was accomplished by anchoring polyethylenimine (PEI) onto the surface of pyroxene nanoparticles without surface modifications or preliminary coating. Characterization was followed out by textural properties, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), infrared (IR) spectroscopy, and thermogravimetric analysis (TGA). The prepared nanoparticles were successfully functionalized by the PEI and portrayed granulated-like morphologies with average crystaline domain sizes around 10Â nm and BET surface area (â¼18Â m2/g) that increased reasonably to â¼119Â m2/g by drying using lyophilizing method instead of conventional drying of the synthesized materials. The prepared PEI-PNPs showed an excellent adsorption capacity (â¼340Â mg/g) and fast adsorption kinetics (<15Â min) for the CRD from a textile wastewater in batch mode of adsorption compared with that of magnetite nanoparticles and a commercial activated carbon that had lower adsorption capacity of the dye (<50Â mg/g). Adsorption was not influenced by the solution pH owing to the wide range of PEI buffering capacity. The adsorption kinetics and isotherms could be well delineated using the external mass transfer diffusion and the Sips models, respectively.
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Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 525, 20 July 2017, Pages 20-30