Benzene Removal by Iron Oxide Nanoparticles Decorated Carbon Nanotubes

Abstract

In this paper, carbon nanotubes (CNTs) impregnated with iron oxide nanoparticles were employed for the removal of benzene from water. The adsorbents were characterized using scanning electron microscope, X-ray diffraction, BET surface area, and thermogravimetric analysis. Batch adsorption experiments were carried out to study the adsorptive removal of benzene and the effect of parameters such as pH, contact time, and adsorbent dosage. The maximum removal of benzene was 61% with iron oxide impregnated CNTs at an adsorbent dosage 100 mg, shaking speed 200 rpm, contact time 2 hours, initial concentration 1 ppm, and pH 6. However, raw CNTs showed only 53% removal under same experimental conditions. Pseudo-first-order kinetic model was found well to describe the obtained data on benzene removal from water. Initial concentration was varied from 1 to 200 mg/L for isotherms study. Langmuir isotherm model was observed to best describe the adsorption data. The maximum adsorption capacities were 987.58 mg/g and 517.27 mg/g for iron oxide impregnated CNTs and raw CNTs, respectively. Experimental results revealed that impregnation with iron oxide nanoparticles significantly increased the removal efficiency of CNTs.

Enhanced Adsorption of Selenium Ions from Aqueous Solution Using Iron Oxide Impregnated Carbon Nanotubes

“…In recent years, multiwalled carbon nanotubes (CNTs) have been explored widely due to their unique properties [24–26] and have been extensively used in nanotechnology, optics, electronics, material science, and water treatment [27]. CNTs were also reported for the adsorption of heavy metal ions [28–32] and organic compounds [33–36]. Despite the most recent comprehensive review articles and to the best of our knowledge, no studies were reported on the use of multiwalled carbon nanotubes for Se removal.…”

Synthesis of Patchouli Biochar Cr2O3 Composite Using Double Acid Oxidators for Paracetamol Adsorption

“…CrCl 3 , in the first step, then was continued by calcination of biochar-CrCl 3 composite to form biochar-Cr 2 O 3 composite. Some previous researchs have called this way of modification by term of impregnation [18,19,20].…”

Endohedral and exohedral complexes of 1‐benzene with carbon nanotubes and high‐density assembly of multiple benzenes inside of a carbon nanotube

“…CNTs are an important carbon‐based adsorptive material with exceptional adsorption capabilities and high adsorption efficiency for various organic pollutants . CNTs are particularly promising as a benzene adsorbent for environmental protection/remediation . For example, in the study of Abbas et al CNTs impregnated with iron oxide nanoparticles were employed for the removal of benzene from water.…”

“…CNTs are particularly promising as a benzene adsorbent for environmental protection/remediation . For example, in the study of Abbas et al CNTs impregnated with iron oxide nanoparticles were employed for the removal of benzene from water. Elsehly et al investigated the performance of CNT‐based filter for benzene removal from aqueous solutions, and they indicated that the filters were efficient for benzene removal.…”