Results
Title

A cyclodextrin/glycine-functionalized TiO<sub>2</sub> nanoadsorbent: Synthesis, characterization and application for the removal of organic pollutants from water and real textile wastewater.

Authors

Mousaui, Seyed Hossein; Mohammadi, Asadollah

Abstract

In this paper, β-cyclodextrin-glycine-modified Ti02 nanoparticles (Ti02/Gly//i-CD NPs) as a nano-adsorbent were prepared and employed for the removal of some organic pollutants from aqueous solutions. Results from FT-IR, FESEM, TEM, XRD, EDX and BET surface area measurement showed that the Ti02 NPs was modified with Gly and peta-cyclodextrin [pCD). The effect of environmental factors, including pH, contact time, adsorbent dosage, temperature, and initial dye concentration on the adsorption ability of the Ti02/Gly/β-CD were investigated in detail. The results of this study showed that TiC/Gly/β-CD has high adsorption efficiency toward organic dyes, and were comparable with other adsorbents. The adsorption capacities of MB, MO, AB113, and DR1 onto Ti02/Gly/β-CD NPs are found to be 81.97 mg/g, 384.62 mg/g, 76.92 mg/g, and 138.89 mg/g, respectively. In addition, the adsorbent presented can be used in several adsorption-desorption cycles. The dye adsorption kinetics, thermodynamics and isotherms were also investigated. The results indicated that pseudo-second-order kinetic model with correlation coefficients greater than 0.9971, and Freundlich isotherm model with correlation coefficients greater than 0.991 well describe the adsorption of MB, MO, AB113, and DR1 on the Ti02/Gly/β-CD NPs. Moreover, the thermodynamic parameters indicated that the adsorption process for all types of organic dyes was exothermic. Additionally, the adsorbent was successfully applied to remove industrial dyes from real textile wastewater with satisfactory results.

Subjects

TITANIUM dioxide; SORBENT manufacturing; CYCLODEXTRIN derivatives; ORGANIC compounds removal (Sewage purification); TEXTILE waste

Publication

Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B, 2018, Vol 114, Issue Part B, p1

ISSN

0957-5820

Publication type

Academic Journal

DOI

10.1016/j.psep.2017.12.004