scholarly journals Activated biochars derived from wood biomass liquefaction residues for effective removal of hazardous hexavalent chromium from aquatic environments

GCB Bioenergy ◽  
2021 ◽  
Author(s):  
Dominika Janiszewska ◽  
Rafał Olchowski ◽  
Aldona Nowicka ◽  
Magdalena Zborowska ◽  
Krzysztof Marszałkiewicz ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Aquatic Environments ◽  
Wood Biomass ◽  
Effective Removal

Aerosol-Assisted Self-Assembly of Reticulated N-Doped Carbonaceous Submicron Spheres for Effective Removal of Hexavalent Chromium

2016 ◽  
Vol 8 (26) ◽  
pp. 16699-16707 ◽  
Author(s):  
Jiawei He ◽  
Yuan Long ◽  
Yiyan Wang ◽  
Chaoliang Wei ◽  
Jingjing Zhan
Keyword(s):  
Hexavalent Chromium ◽  
Self Assembly ◽  
Effective Removal

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

Metal–organic framework@silica as a stationary phase sorbent for rapid and cost-effective removal of hexavalent chromium

2018 ◽  
Vol 6 (6) ◽  
pp. 2742-2751 ◽  
Author(s):  
Worood A. El-Mehalmey ◽  
Ahmed H. Ibrahim ◽  
Arwa A. Abugable ◽  
Mohamed H. Hassan ◽  
Rana R. Haikal ◽  
...  
Keyword(s):  
Stationary Phase ◽  
Hexavalent Chromium ◽  
Metal Organic Framework ◽  
Cost Effective ◽  
Amino Derivative ◽  
Solid Sorbent ◽  
One Pot ◽  
Effective Removal ◽  
Metal Organic ◽  
Organic Framework

A one-pot synthesis is described to construct a composite of the amino-derivative Zr carboxylate metal–organic framework and silica gel (UiO-66-NH2@silica) as an efficient solid sorbent for hexavalent chromium.

scholarly journals Effective Removal of Hexavalent Chromium from Polluted Water using Phoenix sylvestris Seed Powder as Adsorbent

2019 ◽  
Vol 31 (6) ◽  
pp. 1327-1331
Author(s):  
P. KARUNASRI MEGHANA ◽  
K. VENKATA PRAVALIKA ◽  
P. JANAKI SRIRAM ◽  
K. RAVINDHRANATH
Keyword(s):  
Adsorption Capacity ◽  
Hexavalent Chromium ◽  
Extraction Method ◽  
Contact Time ◽  
Industrial Effluents ◽  
Polluted Water ◽  
Chromium Vi ◽  
Effective Removal ◽  
Maximum Extraction ◽  
Fold Excess

Phoenix sylvestris seed powder (PSSP) was investigated as an adsorbent for the removal of chromium(VI) ions from water using batch extraction method. The conditions for the maximum extraction were optimized. The adsorption capacity was found to be 22.5 mg/g at pH= 2, contact time: 60 min, PSSP dosage: 0.40 g/500mL, rpm: 300 and temp.: 28 ± 2 ºC and found to be more suitable adsorbant than compared to other reported adsorbents in the literature. Co-ions even in five-fold excess were less interfered. Regeneration studies revealed that Phoenix sylvestris seed powder can be used up to three cycles. The method developed was successfully applied to polluted water/industrial effluents samples.

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).

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