Carbon Nanotubes for Removal of Fast Green Dye

Abstract

The adsorption of Fast Green (FG) dye on pristine multi-walled carbon nanotubes (CNTs) was investigated in this study. The adsorption was carried out under different operating conditions. The operating conditions were contact time, adsorbent dosage, initial dye concentration, the pH of the solution and temperature. The analysis of results found that the removal percentage of FG dye on CNTs decreases with increase in initial FG concentration. It was found that the increasing of CNTs dosage enhanced the efficiency of dye removal. It was also found that the increasing of temperature significantly enhanced the removal percent of FG dye and it is indicated that the adsorption of FG dye on CNTs was in endothermic nature. The study reports that the best pH of solution for the adsorption of FG on CNTs were 4. The adsorption data have been analyzed using Langmuir and Freundlich. Fitting the equilibrium adsorption data by Langmuir and Freundlich models shows that experimental data well explained by the Langmuir equation.

Application of Perovskite Strontium Doped Neodymium Manganite (Nd0.6Sr0.4MnO3) for Effective Removal of Fast Green Dye, A Toxic Wastewater Contaminant“

“…The kinetic studies for the present case were performed at various time intervals with an initial concentration of 100 mg/L of dye solution (20 mL) with 0.05 g of NSMO. The pseudo‐first‐order kinetic model is given by Equation 6. [24] $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm Ln}({q}_{e}-{q}_{t})={\rm \ }{\rm ln}{q}_{e\left(cal\right)}-{K}_{1}t\hfill\cr}}$$$ …”

“…Further, for all the studies mentioned above, the efficacy or % removal of the dye and the adsorption capacity were estimated using Equations 1 and 2, respectively [24] $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr \char37 \ removal\ of\ Fast\ Green\ \left(FG\right),\ \char37 R={{({C}_{i}-{C}_{f})}\over{{C}_{i}}}\times 100\hfill\cr}}$$$ $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr Adsorption\ capacity={{({C}_{i}-{C}_{f})}\over{m}}\times V\hfill\cr}}$$$ …”

“…Further, for all the studies mentioned above, the efficacy or % removal of the dye and the adsorption capacity were estimated using Equations 1 and 2, respectively. [24] % removal of Fast Green FG ð Þ;…”

“…[23] Salim et al have used carbon nanotubes for FG dye removal. [24] Gupta et al focused on removing Fast green, methylene blue, and Rhodamine B using red mud as an adsorbent with a removal rate of 71.1-94 %. [25] Given the broad applicability and ease of operation, adsorption studies for FG dye removal have been investigated in the present work using a well-studied, strongly correlated compound of the manganite family.…”

Oxygen Functionalized and Pristine Carbon Nanotubes Efficiency for Adsorption of Methyl Orange Dye

“…Recently, nano-structured materials have been extensively used to remove toxic substances. CNT scan served as excellent adsorbents and widely studied carbon nanomaterials due to their large specific surface area and hollow and layered structure [19][20][21].…”