Introduction of α-MnO2nanosheets to NH2graphene to remove Cr6+from aqueous solutions

RSC Advances ◽  
2015 ◽  
Vol 5 (55) ◽  
pp. 44096-44106 ◽  
Author(s):  
Li Zhang ◽  
Yaxi Tian ◽  
Yaopeng Guo ◽  
Hui Gao ◽  
Haizhen Li ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Planar Structure ◽  
Chromium Ions

The planar structure of the designed α-MnO2–NH2–RGO hybrid was prepared and characterized and used to remove hexavalent chromium ions (Cr6+) from aqueous solutions.

Elaboration of novel polyaniline@Almond shell biocomposite for effective removal of hexavalent chromium ions and Orange G dye from aqueous solutions

2020 ◽  
Vol 27 (13) ◽  
pp. 15245-15258 ◽  
Author(s):  
Abdelghani Hsini ◽  
Abdelilah Essekri ◽  
Nouh Aarab ◽  
Mohamed Laabd ◽  
Abdelaziz Ait Addi ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Almond Shell ◽  
Chromium Ions ◽  
Effective Removal ◽  
Orange G

Synthesis and Characterization of γ-Fe2O3/Carbon Hybrids and Their Application in Removal of Hexavalent Chromium Ions from Aqueous Solutions

Langmuir ◽  
2012 ◽  
Vol 28 (8) ◽  
pp. 3918-3930 ◽  
Author(s):  
Maria Baikousi ◽  
Athanassios B. Bourlinos ◽  
Alexios Douvalis ◽  
Thomas Bakas ◽  
Dimitrios F. Anagnostopoulos ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Synthesis And Characterization ◽  
Chromium Ions

Application of dolochar in the removal of cadmium and hexavalent chromium ions from aqueous solutions

2011 ◽  
Vol 192 (2) ◽  
pp. 822-831 ◽  
Author(s):  
L. Panda ◽  
B. Das ◽  
D.S. Rao ◽  
B.K. Mishra
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Chromium Ions

scholarly journals Hexavalent Chromium Uptake from Aqueous Solutions using Raw Biomass of the Invasive Brown Seaweed Sargassum muticum from the Moroccan Shorelines: Kinetics and Isotherms

2016 ◽  
Vol 12 (30) ◽  
pp. 243
Author(s):  
Samir El Atouani ◽  
Soufiane Tahiri ◽  
Abdeltif Reani ◽  
Fouad Bentiss ◽  
Mohammed El Krati ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Atlantic Coast ◽  
Brown Seaweed ◽  
Sargassum Muticum ◽  
Maximum Sorption Capacity ◽  
Chromium Ions ◽  
Biosorption Process ◽  
Isotherm Equations ◽  
Kinetics And Isotherms

Raw biomass of the invasive Japanese brown seaweed Sargassum muticum, recently introduced to the Atlantic coast of Morocco, has been applied for the removal of hexavalent chromium Cr(VI) from aqueous solutions. Various parameters such as biomass dose, initial pH, contact time and initial Cr(VI) concentration were studied to reveal their effects on the biosorption process. At optimum values of the above mentioned parameters, total removal of Cr(VI) can be achieved within 10 min at pH 2, adsorbent dose of 0.5 g/100 mL for initial chromium ions concentration of 50 mg/L. Cr(VI) biosorption follows pseudo second-order kinetics. Adsorption isotherms were determined at room temperature and the experimental data were modelled with the Langmuir, Freundlich and Temkin isotherm equations. The isotherm data were found to be well fitted by linear Langmuir equation. The maximum sorption capacity calculated from Langmuir isotherm was estimated to be about 143 mg per gram of dry biosorbent. Thus, the biomass used in this study can be considered a promising and valuable natural adsorbent for the treatment of aqueous solution containing toxic hexavalent chromium ions.

Photocatalytic Reduction of Hexavalent Chromium Ions from Aqueous Solutions Using Polymeric Microfibers Surface Modified with ZnO Nanoparticles

2021 ◽  
Author(s):  
Graciela Morales ◽  
Andrés Castro-Ruiz ◽  
Heriberto Rodríguez-Tobías ◽  
Gustavo A. Abraham ◽  
Guadalupe Rivero ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Zno Nanoparticles ◽  
Photocatalytic Reduction ◽  
Chromium Ions ◽  
Surface Modified

Adsorption characteristics of modified sand for the removal of hexavalent chromium ions from aqueous solutions: Kinetic, thermodynamic and equilibrium studies

CATENA ◽  
2013 ◽  
Vol 100 ◽  
pp. 120-127 ◽  
Author(s):  
Sandeep Yadav ◽  
Varsha Srivastava ◽  
Sushmita Banerjee ◽  
Chih-Huang Weng ◽  
Yogesh C. Sharma
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Equilibrium Studies ◽  
Adsorption Characteristics ◽  
Chromium Ions

scholarly journals A theoretical and experimental study of the adsorptive removal of hexavalent chromium ions using graphene oxide as an adsorbent

2020 ◽  
Vol 18 (1) ◽  
pp. 936-942
Author(s):  
Ardhmeri Alija ◽  
Drinisa Gashi ◽  
Rilinda Plakaj ◽  
Admir Omaj ◽  
Veprim Thaçi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hexavalent Chromium ◽  
Adsorption Energy ◽  
Density Functional ◽  
Noncovalent Interactions ◽  
Theoretical Calculations ◽  
Chemical Oxidation ◽  
Chromium Ions ◽  
Adsorption Sites ◽  
Vis Spectroscopy

AbstractThis study is focused on the adsorption of hexavalent chromium ions Cr(vi) using graphene oxide (GO). The GO was prepared by chemical oxidation (Hummers method) of graphite particles. The synthesized GO adsorbent was characterized by Fourier transform infrared spectroscopy and UV-Vis spectroscopy. It was used for the adsorption of Cr(vi) ions. The theoretical calculations based on density functional theory and Monte Carlo calculations were used to explore the preferable adsorption site, interaction type, and adsorption energy of GO toward the Cr(vi) ions. Moreover, the most stable adsorption sites were used to calculate and plot noncovalent interactions. The obtained results are important as they give molecular insights regarding the nature of the interaction between GO surface and the adsorbent Cr(vi) ions. The found adsorption energy of −143.80 kcal/mol is indicative of the high adsorptive tendency of this material. The adsorption capacity value of GO toward these ions is q = 240.361 mg/g.

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