Removal of Chromium from Synthetic Wastewater Using Modified Maghemite Nanoparticles

Abstract

The main aim of this study was to ascertain the removal of chromium ions from synthetic wastewater using modified maghemite nanoparticles (MNPs). Commercially available maghemite nanoparticles (NPs) (< 50 nm) were modified using sodium dodecyl sulfate (SDS). The MNPs were characterized using a powder X-ray diffractometer (XRD) and Fourier transform infrared spectrophotometer (FTIR). Statistically designed batch experiments were carried out to evaluate the effects of various parameters, namely the pH of the solution, initial chromium concentration, and adsorbent dose, on the chromium removal efficiency (RE). The results from this study showed that the adsorbent dose had a synergistic effect on chromium RE, while pH and initial chromium concentration had antagonistic effects on the RE. An optimal chromium RE of 95.8% was obtained at pH = 2.6, adsorbent dose = 5 g/L, and initial chromium concentration = 20 mg/L. The analysis of variance (ANOVA) results showed that the model was significant, with high F value (F = 80.07) and low P value (P = < 0.001). Based on the results obtained from the experiments, the MNPs could be exploited as an efficient adsorbent for chromium removal from wastewater.

Covalent and Non-covalent Functionalized Nanomaterials for Environmental Restoration

“…Behera et al [353] studied the removal of hexavalent chromium based on sodium dodecyl sulfate (SDS)-modified maghemite nanoparticles. The highest removal efficiency of 95.8% was obtained for chromium at a pH of 2.6.…”

The effect of synthesis parameters on the hexavalent chromium adsorption of magnetic adsorbents from aqueous solutions

“…Pollutants have been released into water from the anthropogenic activities and the consuming polluted water has many disastrous effects on our health. This has created an excessive demand for an effective water treatment technology, adsorption is one of the most effective and powerful purification technique especially for heavy metal ions due to its ease of handling, low cost and high efficiency [1][2][3] . Research work in nanoscale science and engineering has suggested that nanomaterials have a great potential to improve the capability of this technique to reduce water pollutants [4] .…”

“…Research work in nanoscale science and engineering has suggested that nanomaterials have a great potential to improve the capability of this technique to reduce water pollutants [4] . Magnetic iron oxides is one type of metallic nanomaterials, that have superior characteristic properties for water treatment 5 especially magnetite (Fe3O4) nanoparticles due to their adsorption/reduction activities, magnetic properties, availability, and susceptibility to modification [2] however, magnetite particles tend to aggregate easily and oxidized in air generally resulting in reduce of adsorption /reduction activities and loss of magnetism and dispersibility. In order to provide the proper solutions to these problems different materials with a high specific surface area were used including clay minerals, zeolites, activated carbon etc.…”

Biosorption of hexavalent chromium from aqueous solution by pristine and CaCl2-modified erythromycin production residues

“…Chromium (Cr) is a common metallic element in wastewater released from various industries, like electroplating, leather tanning, metal nishing, battery and textiles, etc. (Miretzky et al 2010;Behera SK et al 2020). Although chromium can exist in different oxidation states (from -2 to +6).…”