Fabrication, Characterization, and Dye Adsorption Capability of Recycled Modified Polyamide Nanofibers

Metwally, Bahaa S.; El-Sayed, Amr Atef; Radwan, Emad K.; Hamouda, Asmaa S.; El-Sheikh, M. N.; Salama, Mohamed

doi:10.21608/ejchem.2018.3967.1367

Fabrication, Characterization, and Dye Adsorption Capability of Recycled Modified Polyamide Nanofibers

Document Type : Original Article

Authors

¹ Textile technology department, Faculty of industrial education, Beni-Suef University, Beni-Suef, Egypt

² Textile Research Division, National Research Centre, El Bohouth St, Dokki, Giza, Egypt 12622

³ Department of Water Pollution Research, National Research Centre, El Bohouth St, Dokki, Giza, Egypt 12622

⁴ Environmental Sciences and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef, Egypt

⁵ Mechanical Engineering Department, Beni-Suef University, Beni-Suef, Egypt

⁶ Textile Research Division, National Research Centre, Cairo, Egypt.

10.21608/ejchem.2018.3967.1367

Abstract

Utilization of electrospinning technique accompanied by chemical modification as well as, the production of low-cost adsorbent based on polyamide nanofibers is the aim of our current work. The electrospinning parameters (polymer conc., applied voltage, and collector distance) have been studied. The obtained polyamide nanofiber mats were modified with citric acid at various conditions (concentration, temperature and catalyst concentration). The optimum conditions of this modification were investigated by MB uptake efficiency. The obtained data illustrate a positive relationship between citric acid concentration and MB uptake using the modified polyamide nanofiber. The produced adsorbent was well characterized using SEM, ATR-FTIR, and surface area measurement. Scanning Electron Microscopy clarifies minor swelling of nanofibers during the modification process which attributed to the increase in fiber diameter and therefore reduction in the fiber surface area. The adsorption performance of the nanofiber mat was assessed as a function of pH, nanofiber mat dosage, contact time, and initial dye concentration. Kinetics and isotherms analysis were investigated as well. The MB separation capability of the modified PA-nanofiber was considerably higher than that of the PA-nanofiber. The kinetic data of both nanofiber mat was better fitted with the pseudo-second-order model. Also, the equilibrium data of PA-nanofiber was better fitted with Freundlich model and Langmuir model in case of the modified PA-nanofiber. The adsorption behavior was favorable chemisorption process as inferred from the kinetics, and the isotherms studies. The results of this study promote the modified PA-nanofiber as a potential adsorption filters for dyeing wastewater decolourization.

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