Kinetics and Thermodynamics of Adsorption of Chromium (VI) on Starch Functionalized Iron Oxide Nanoparticles in Aqueous Medium

2015 ◽  
Vol 5 (2) ◽  
pp. 98-104
Author(s):  
Prakash Singh ◽  
Dhanesh Tiwary ◽  
Indrajit Sinha
Keyword(s):  
Iron Oxide ◽  
Aqueous Medium ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Kinetics And Thermodynamics ◽  
Thermodynamics Of Adsorption ◽  
Chromium Vi

Development of iron oxide nanoparticles using alginate hydrogel template for chromium (VI) ions removal

2020 ◽  
Vol 175 ◽  
pp. 229-243
Author(s):  
A.M. Omer ◽  
T.M. Tamer ◽  
W.M. Abou-Taleb ◽  
G.D. Roston ◽  
E.F. Shehata ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Alginate Hydrogel ◽  
Chromium Vi

Chromium (VI) removal using cerium doped iron oxide nanoparticles

2019 ◽  
Vol 6 (11) ◽  
pp. 115098 ◽  
Author(s):  
José Sabino da Silva Neto ◽  
Vivian Stumpf Madeira ◽  
Gicélia Rodrigues ◽  
Jerlan Alves da Silva ◽  
Mariana Fortini Moreira
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Chromium Vi

Graphene oxide impregnated with iron oxide nanoparticles for the removal of atrazine from the aqueous medium

2018 ◽  
Vol 54 (16) ◽  
pp. 2653-2670 ◽  
Author(s):  
Murilo B. Andrade ◽  
Tássia R. T. Santos ◽  
Marcela Fernandes Silva ◽  
Marcelo F. Vieira ◽  
Rosângela Bergamasco ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Iron Oxide ◽  
Aqueous Medium ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles

scholarly journals Supercritical CO2Assisted Synthesis of EDTA-Fe3O4Nanocomposite with High Adsorption Capacity for Hexavalent Chromium

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Gunjan Bisht ◽  
Sanjila Neupane ◽  
Rebika Makaju
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Adsorption Capacity ◽  
Iron Oxide Nanoparticles ◽  
Batch Adsorption ◽  
Oxide Nanoparticles ◽  
Maximum Adsorption Capacity ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Magnetic Iron Oxide ◽  
Chromium Vi

Efficiency of EDTA functionalized nanoparticles in adsorption of chromium (VI) from water was investigated in this study. Magnetic iron oxide nanoparticles (IONPs) were synthesized by a simple chemical coprecipitation route and EDTA coating onto IONPs was attained via supercritical carbon dioxide (Sc CO2), a technology with green sustainable properties. The obtained nanoparticles were then characterized by UV-Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and vibrating magnetometric analysis (VSM). The synthesized nanoparticle and its modified variant were evaluated as adsorbent for chromium (VI) removal from water through batch adsorption technique and the effect of analytic concentration; contact time and adsorbent concentration were studied at pH 2. The results showed higher removal efficiency for modified magnetic iron oxide nanoparticles (MIONPs) (i.e., 99.9%) than their nonmodified variant IONPs, that is, 34.06% for the same concentration after 18 hours of incubation. Also maximum adsorption capacity (qe= 452.26 mg/g) of MIONPs attained can be related to their preparation in Sc CO2asqecalculated from IONPs, that is, 170.33 mg/g, is lower than that of MIONPs. The adsorption data fit well with Freundlich isotherm equation while kinetic adsorption studies of chromium (VI) were modeled by pseudo-second-order model.

Simplified synthesis of new GO-α-γ-Fe2O3-Sh adsorbent material composed of graphene oxide decorated with iron oxide nanoparticles applied for removing diuron from aqueous medium

2020 ◽  
Vol 8 (4) ◽  
pp. 103903 ◽  
Author(s):  
Murilo Barbosa de Andrade ◽  
Ana Carolina Sestito Guerra ◽  
Tássia Rhuna Tonial dos Santos ◽  
Luís Fernando Cusioli ◽  
Rodrigo de Souza Antônio ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Iron Oxide ◽  
Aqueous Medium ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles
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