Application of dendrimer/titania nanohybrid for the removal of phenol from contaminated wastewater

Abstract

In this study, polyamidoamine dendrimer of generation 4 was successfully immobilized on titania nanoparticles to synthesize a new nanohybrid (Den/TiO 2 ) with the capability of encapsulation for phenol removal from the polluted effluents. Characterizations of the adsorbent using SEM, TEM, XRD, and FTIR analyses indicated the successful immobilization of dendrimers onto the surface of titania. The effect of important parameters on removal efficiency such as retention time, pH, phenol concentration, Den/TiO 2 dosage, and temperature was investigated. The isotherm, kinetic, and thermodynamic parameters of the removal process were demonstrated, and the experimental data followed the Langmuir and pseudo-second-order model with high correlation coefficients. The calculated thermodynamic parameters showed that the removal of phenol using Den/TiO 2 was an endothermic and spontaneous process. The obtained results indicate that the prepared nanohybrid can be effectively used for the removal of phenol from industrial wastewaters.

Biopolymeric Nanocomposites for Wastewater Remediation: An Overview on Recent Progress and Challenges

“…Similarly, a stable chitosan-TiO 2 nanocomposite (CTNC) was synthesized for the quantitative and selective elimination of Rose Bengal dye from industrial wastewater with a 79.365 mg/g adsorption capacity [ 174 ]. A polyamidoamine dendrimer was successfully mounted on titania nanoparticles to create a novel nanohybrid with encapsulation potential for phenol removal from industrial wastewater [ 175 ]. Paleos and coworkers produced and characterized a variety of poly(propylene imine) dendrimers functionalized with extended aliphatic chains.…”

Current trends in nanotechnology for bioremediation

“…Polyamidoamine (PAMAM) dendrimers with extraordinary structure and properties are used as efficient and non-toxic water treatment agents (Figure 2). Researchers have developed a simple filtration unit for the expulsion of organic pollutants by using TiO 2 porous ceramic filters of which the pore was immobilised with an alkylated poly(propylene imine) dendrimer, poly(ethyleneimine) hyperbranched polymer, or cyclodextrin, therefore resulting in hybrid organic/inorganic filter modules of high mechanical strength and high surface area (DeFever et al, 2015;Hayati et al, 2016).…”

Silk/Polyamidoamine Membranes for Removing Chromium VI from Water

“…In this regard, amine groups have been extensively studied for their strong interactions with Cr(VI) ions [32][33][34]. Several amine-functionalized adsorbents have been developed, among them composite adsorbents combining PAMAM dendrimers with organic [35][36][37] or inorganic solids [38][39][40]. However, all these treatments are not always sufficiently efficient to satisfy the severe requirements for drinking water.…”