Treatment of Reactive Dyes Using Amberlite Resin Functionalized with Amine‐Based Solvent – Batch and Continuous Studies

Abstract

The azo dyes Reactive Orange‐16 and Reactive Green‐19 were removed using Aliquat‐336‐incorporated Amberlite XAD7HP resin in batch and in a continuous stirrer vessel. The prepared resin was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Brunauer‐Emmett‐Teller method, and X‐ray photoelectron spectroscopy. The effect of dosage, initial dye concentration, time, pH, and temperature on the removal efficiency of both dyes was evaluated. Equilibrium, kinetic, and diffusion models were fitted to the batch data. Design calculations for single‐stage batch adsorption were done to scale up the process industrially. The resin was regenerated using ethanol. To intensify the process further, continuous studies were performed in a recirculating stirred vessel at different flow rates and stirring speeds.

Study of the Preparation and Performance of TiO2-Based Magnetic Regenerative Adsorbent

“…Moreover, the repeated use of adsorbents after separation and recovery can improve the utilization rate of adsorbent materials, thus preventing secondary pollution and reducing adsorption costs [15]. Commonly used adsorbents include activated carbon [16], natural minerals [17], resin materials [18], nanomaterials [19], etc. Magnetic separation is a method that utilizes the different magnetic properties of various pollutants in dye wastewater, allowing the pollutants to undergo heterogeneous phase transfer under a magnetic field, thereby achieving separation and recovery.…”