Preparation and characterization of polyethylenimine-functionalized pyroxene nanoparticles and its application in wastewater treatment

被引:26
|
作者
Hethnawi, Afif [1 ]
Nassar, Nashaat N. [1 ]
Vitale, Gerardo [1 ]
机构
[1] Univ Calgary, Dept Chem & Petr Engn, Calgary, AB T2N 1N4, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Polyethylenimine; Pyroxene; Nanoparticles; Adsorption; Functionalization; Textile wastewater; Dye; ALPHA-FE2O3 HOLLOW SPHERES; ADSORPTIVE REMOVAL; ACTIVATED CARBON; AQUEOUS-SOLUTIONS; DYE; DEGRADATION; NANOTECHNOLOGY; NANOMATERIALS; PERFORMANCE; FILTRATION;
D O I
10.1016/j.colsurfa.2017.04.067
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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 10 nm and BET surface area (similar to 18 m(2)/g) that increased reasonably to similar to 119 m(2)/g by drying using lyophilizing method instead of conventional drying of the synthesized materials. The prepared PEI-PNPs showed an excellent adsorption capacity (similar to 340 mg/g) and fast adsorption kinetics (< 15 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 ( < 50 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.
引用
收藏
页码:20 / 30
页数:11
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