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

scholarly journals Statistical analyses on effective removal of cadmium and hexavalent chromium ions by multiwall carbon nanotubes (MWCNTs)

Heliyon ◽  
2020 ◽  
Vol 6 (6) ◽  
pp. e04174 ◽  
Author(s):  
K.S. Obayomi ◽  
J.O. Bello ◽  
M.D. Yahya ◽  
E. Chukwunedum ◽  
J.B. Adeoye
Keyword(s):  
Carbon Nanotubes ◽  
Hexavalent Chromium ◽  
Multiwall Carbon Nanotubes ◽  
Statistical Analyses ◽  
Chromium Ions ◽  
Effective Removal ◽  
Multiwall Carbon

scholarly journals Sequestration of hexavalent chromium from aqueous solutions by activated carbon derived from Macadamia nutshells

2016 ◽  
Vol 75 (1) ◽  
pp. 196-206 ◽  
Author(s):  
V. E. Pakade ◽  
O. B. Nchoe ◽  
L. Hlungwane ◽  
N. T. Tavengwa
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Activated Carbons ◽  
Cost Effective ◽  
Sorption Process ◽  
Freundlich Model ◽  
Optimum Parameters ◽  
Effective Removal ◽  
Efficient Adsorbent

The purpose of this study was to investigate the feasibility of activated carbons prepared from Macadamia nutshells as an efficient adsorbent for the removal of hexavalent chromium (Cr(VI)) from aqueous solutions. The activated carbon was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), CHNS analyzer and Brunauer–Emmett–Teller (BET). For effective removal of Cr(VI), the optimum parameters found were pH 2, 120 min of contact time and 0.2 g of sorbent. The adsorption data fitted well into the Freundlich model, suggesting a multilayer sorption process. The results demonstrated that Macadamia activated carbon could be used as cost-effective biosorbent for the treatment of aqueous solutions contaminated by Cr(VI) with an adsorption capacity of 22.3 mg g−1. The mode of removal involved adsorption and reduction of Cr(VI) to Cr(III).

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

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.

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

Effective removal of hexavalent chromium from aqueous solutions by adsorption on mesoporous carbon microspheres

2016 ◽  
Vol 462 ◽  
pp. 200-207 ◽  
Author(s):  
Jianguo Zhou ◽  
Yuefeng Wang ◽  
Jitong Wang ◽  
Wenming Qiao ◽  
Donghui Long ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Mesoporous Carbon ◽  
Carbon Microspheres ◽  
Effective Removal

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
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