Efficient Removal of Reactive Blue 19 Dye by Co-Electrospun Nanofibers

Abstract

The present work demonstrates the new nanofiber mats prepared through co-electrospinning of two different polymers i.e. corn protein namely Zein and Nylon-6. The composite nanofiber membrane was used as an effective adsorbent material for the removal of toxic reactive dye i.e. Reactive Blue 19 (RB 19) from water solution. These co-electrospun nanofibers had good mechanical strength compared to zein nanofibers alone. Experimental results suggested that zein/nylon nanofibers have greater potential for total removal of RB19 at room temperature within 10 min of contact time from aqueous solution. The maximum capacity was found to be 70 mg/g of nanofibers. The mechanism of RB19 removal on proposed nanofibers is mainly through hydrogen bond and electrostatic means.

Thermodynamic and Kinetic Studies for Adsorption of Reactive Blue (RB-19) Dye Using Calix[4]arene-Based Adsorbent

“…The value of n reveals the favorability and degree of heterogeneity. Calculated from the Freundlich model, n > 1 suggests favorable adsorption conditions …”

“…Calculated from the Freundlich model, n > 1 suggests favorable adsorption conditions. 17 The Dubinin−Radushkevich (D−R) isotherm model is applied to describe and distinguish the physical and chemical adsorption nature of the adsorption mechanism. An important factor in the D−R model, the polynie potential (ε) can be calculated as follows: 34…”

“…Conventionally, different techniques were used for the removal of azo dyes such as adsorption, photodegradation, membrane separation, electrolytic chemical treatment, catalytic processes, and ozone treatment . The adsorption process has got much more attention for the treatment of dye-contaminated water due to easy application, low cost, higher efficiency, and reproducibility. − Therefore, different types of inexpensive, reproducible, and environmentally favorable adsorbents have been produced. In this regard, calixarene-functionalized adsorbents with different solid supports have been efficiently used for the removal of azo dyes.…”

Optimization of toxic metal adsorption on DEA-calix[4]arene appended silica resin using a central composite design

“…Importantly, n 4 1 indicates that adsorption conditioning is favorable. 50 Consequently, the adsorption of metal ions onto the DEAcalix [4]arene resin shows values of n 4 1, which are 7.06, 8.85 and 13.2 for Pb 2+ , Cd 2+ and Hg 2+ , respectively, suggesting that adsorption is auspicious with respect to the Freundlich isotherm. Also, the value of the separation factor (R L ) is indicated as R L 4 1 (greater than 1), as shown in Table 6, which demonstrates that the Langmuir isotherm is unfavorable for metal ions in this adsorption.…”

Trypan blue removal from water with zein sorbents and laccase

“…While Reactive Blue 19 has been sorbed onto nylon-zein fibers [38], zein was not used before for the removal of Trypan blue from water. The effectiveness of laccase in degrading Trypan blue pre-sorbed onto zein sorbents was also not investigated in previous studies.…”