Preparation and characterization of iron oxide nanoparticles coated with chitosan for removal of Cd(II) and Cr(VI) from aqueous solution

Shalaby, Thanaa I.; Fikrt, N. M.; Mohamed, Moustafa M.; Kady, Marwa F. El

doi:10.2166/wst.2014.315

Cited by 26 publications

(11 citation statements)

References 2 publications

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“…This creates electrostatic attraction between the hydronium ions and chromium ions resulting in better adsorption. However, chromium ions also compete for the protons at the lower pH 44,45Figure 12Optimization of pH for chromium removal.…”

Section: Resultsmentioning

confidence: 99%

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

Samrot¹,

Sahithya²,

A³

et al. 2019

IJN

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BackgroundSuper-paramagnetic iron oxide nanoparticles (SPIONs) are widely used metal nanoparticles for various applications for its magnetic property and biocompatibility. In recent years, pollution of our environment especially with heavy metals in waterbodies has become a major threat and has left us very minimal sources of freshwater to drink. SPIONs or surface modified SPIONs can be used to remove these heavy metalsMethodsSPIONs were synthesized by co-precipitation method and further coated with a biopolymer, chitosan. Chromium solution was treated with the synthesized SPIONs to study the efficiency of chromium removal by surface adsorption. Later, the adsorption was analysed by direct and indirect analysis methods using UV-VIS spectrophotometry and isotherm studies.ResultsStable chitosan-coated SPIONs were synthesized and they adsorbed chromium better than the uncoated SPIONs, where it was adsorbing up to 100 ppm. Adsorption was found to be increasing with decrease in pH.ConclusionThe surface-modified SPIONs expressed cumulative adsorption action. Even after the adsorption studies, chitosan-coated SPIONs were possessing magnetic property. Thus, the surface-modified SPIONs can become an ideal nanotechnology tool to remove the chromium from groundwater.

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Section: Resultsmentioning

confidence: 99%

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

Samrot¹,

Sahithya²,

A³

et al. 2019

IJN

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“…Even the nanoparticles also adsorbs chromium; thus, chitosan-coated nanoparticles showed greater efficiency than the control. Even the applied acidic pH has its role in adsorption and removal of heavy metal from wastewater (Alzaidi et al 2016;Shalaby et al 2014).…”

Section: Chromium Metal Adsorption Studiesmentioning

confidence: 99%

“…9a-c). This suggested that the binding sites on the adsorbent were heterogeneous and multilayer adsorption of chromium could occur (Jiang et al 2013;Shalaby et al 2014).…”

Section: Chromium Metal Adsorption Studiesmentioning

confidence: 99%

Utilization of chitosan-coated superparamagnetic iron oxide nanoparticles for chromium removal

et al. 2018

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Superparamagnetic iron oxide nanoparticles (SPIONs) have been widely used for their versatility, while it is coated with a biopolymer like chitosan that adds attraction and also increases its applications. In this study, SPION was synthesized by chemical co-precipitation method, characterized using various analytical techniques like UV-Vis, FTIR, SEM, EDX, TEM, AFM, XRD, zeta potential and Raman spectroscopy analysis. Chitosan was coated onto the SPIONs and used for water treatment to remove chromium (450 ppm concentration). Chitosan-coated SPIONs were found to remove about 80% of chromium. Freundlich model was found to be fitting better for the current study.

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“…In addition, the surface charge of nanoadsorbents depends on the pH of solvent. The surface charge becomes neutral at pH 5.8 for iron oxide; further lowering the pH will render the adsorbent surface rich in positive charges and Cr(VI), resulting in better adsorption [37,38]. On the other hand, non-treated composite membrane and bare PVDF exhibited much lower removal efficiencies than that of pretreated Chi@Fe 2 O 3 -PVDF (Figure 5a).…”

Section: Effect Of Solution Phmentioning

confidence: 99%

Removal of Hexavalent Chromium(VI) from Wastewater Using Chitosan-Coated Iron Oxide Nanocomposite Membranes

Park

Shin

et al. 2022

Toxics

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Chromium is a toxic and carcinogenic heavy metal that originates from various human activities. Therefore, the effective removal of chromium from aqueous solutions is an extremely important global challenge. Herein, we report a chitosan-coated iron oxide nanoparticle immobilized hydrophilic poly(vinylidene) fluoride membrane (Chi@Fe2O3–PVDF) which can potentially be used for efficient removal of hexavalent chromium(VI) by a simple filtration process. Membrane filtration is an easy and efficient method for treating large volumes of water in a short duration. The adsorption experiments were conducted by batch and continuous in-flow systems. The experimental data showed rapid capture of hexavalent chromium (Cr(VI)) which can be explained by the pseudo-second-order kinetic and Langmuir isotherm model. The nanocomposite membrane exhibited high adsorption capacity for Cr(VI) (14.451 mg/g in batch system, 14.104 mg/g in continuous in-flow system). Moreover, its removal efficiency was not changed significantly in the presence of several competing ions, i.e., Cl−, NO3−, SO42−, and PO43−. Consequently, the Chi@Fe2O3-PVDF-based filtration process is expected to show a promising direction and be developed as a practical method for wastewater treatment.

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Preparation and characterization of iron oxide nanoparticles coated with chitosan for removal of Cd(II) and Cr(VI) from aqueous solution

Cited by 26 publications

References 2 publications

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

<p>Surface-Engineered Super-Paramagnetic Iron Oxide Nanoparticles For Chromium Removal</p>

Utilization of chitosan-coated superparamagnetic iron oxide nanoparticles for chromium removal

Removal of Hexavalent Chromium(VI) from Wastewater Using Chitosan-Coated Iron Oxide Nanocomposite Membranes

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