Preparation and Characterization of a Novel Activated Carbon@Polyindole Composite for the Effective Removal of Ionic Dye from Water

Abstract

The present study is aimed at the synthesis and exploring the efficiency of a novel activated carbon incorporated polyindole (AC@PIN) composite for adsorptive removal of Malachite Green (MG) dye from aqueous solution. An AC@PIN hybrid material was prepared by in situ chemical oxidative polymerization. The physico-chemical characteristics of the AC@PIN composite were assessed using Fourier-transform infrared spectrometer, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, ultraviolet visible spectroscopy, and determination of point of zero charge (pHPZC). A series of adsorption studies was conducted to evaluate the influence of operational parameters such as pH, contact time, initial dye concentration, AC@PIN dosage, and temperature on dye adsorption behavior of developed composite. A maximum dye removal percentage (97.3%) was achieved at the pH = 10, AC@PIN dosage = 6.0 mg, initial dye concentration 150 mg L−1, and temperature = 20 °C. The kinetic studies demonstrated that the adsorption of MG on AC@PIN followed pseudo-second-order model (R2 ≥ 0.99). Meanwhile, Langmuir isotherm model was founded to be the best isotherm model to describe the adsorption process. Finally, the recyclability test revealed that the composite exhibits good recycle efficiency and is stable after 5 cycles. The obtained results suggest that AC@PIN composite could be a potential candidate for the removal of MG from wastewater.

Enhanced Adsorption of Rhodamine B on Biomass of Cypress/False Cypress (Chamaecyparis lawsoniana) Fruit: Optimization and Kinetic Study

“…This is shown in Figure 10. Additionally, the pseudo-second-order model's experimental Qe value is quite close to the predicted Qe, indicating that this model is the one that best fits our adsorption experimental data [38].…”

Hydrotropically Engineered Polyindole-Encapsulated Flower Shape Nanostructured MoS2 Conductive Framework for Asymmetric Supercapacitors

“…PIN is uniquely positioned as an electrode material with a wide variety of applications attributable to this characteristic. Water treatment, electrochemical charge storage devices (ESDs) like supercapacitors, corrosion prevention, sensors, and even the development of light-emitting diodes (LEDs) are just a few applications of its versatility. PIN’s outstanding electrochemical properties have drawn a lot of interest, especially in the area of supercapacitors, where its superior efficiency is readily apparent .…”

Removal of Anionic Methyl Orange Dye from Water by Poly[2-methyl-1H-indole] Derivatives: Investigation of Kinetics and Isotherms of Adsorption

“…The maximum percentage of dye removal was 97%. 31 Therefore, the creation of sorbents based on poly-(indole) is an urgent task.…”

“…There is also one paper that examined the adsorption of polyindole composite toward malachite green. The maximum percentage of dye removal was 97% . Therefore, the creation of sorbents based on poly­(indole) is an urgent task.…”