Chromium(VI) removal from aqueous medium by maize cane and agave bagasse biomasses

2016 ◽  
Vol 35 (6) ◽  
pp. 704-711 ◽  
Author(s):  
M. J. Marín-Allende ◽  
E. T. Romero-Guzmán ◽  
J. J. Ramírez-García ◽  
L. R. Reyes-Gutiérrez
Keyword(s):  
Aqueous Medium ◽  
Chromium Vi

Use of polyethylene films photografted with 2-(dimethylamino)ethyl methacrylate as a potential adsorbent for removal of chromium (VI) from aqueous medium

2016 ◽  
Vol 133 (18) ◽  
pp. n/a-n/a ◽  
Author(s):  
Hiromichi Asamoto ◽  
Yuji Kimura ◽  
Yohei Ishiguro ◽  
Hiroaki Minamisawa ◽  
Kazunori Yamada
Keyword(s):  
Aqueous Medium ◽  
Polyethylene Films ◽  
Ethyl Methacrylate ◽  
Chromium Vi

Enhanced adsorption of chromium (VI) from aqueous medium by basic nanohydroxyapatite/chitosan composite based on egg shell

2020 ◽  
Vol 206 ◽  
pp. 235-249
Author(s):  
Asaad F. Hassan ◽  
Gehan A. El-Naggar ◽  
Amany G. Braish ◽  
Mohamed F. Amira ◽  
Laila M. Alshandoudi
Keyword(s):  
Aqueous Medium ◽  
Chromium Vi ◽  
Egg Shell ◽  
Enhanced Adsorption ◽  
Chitosan Composite

scholarly journals Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Ilyasse Loulidi ◽  
Fatima Boukhlifi ◽  
Mbarka Ouchabi ◽  
Abdelouahed Amar ◽  
Maria Jabri ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Cost Estimation ◽  
Aquatic Ecosystems ◽  
Adsorption Equilibrium ◽  
Low Cost ◽  
Optimum Conditions ◽  
Spent Coffee Grounds ◽  
Order Model ◽  
Chromium Vi ◽  
Coffee Grounds

Industrial discharges loaded with heavy metals present several problems for aquatic ecosystems and human health. In this context, the present study aims to evaluate the potential of raw spent coffee grounds to remove chromium from an aqueous medium. A structural and textural study of coffee grounds was carried out by FTIR, XRD, and TGA analysis. The optimum conditions for the removal of Cr(VI), for a solution with an initial concentration of 100 mg/l, were adsorbent dose 2.5 g/l, pH 4.0, and contact time 90 min. The adsorption equilibrium results show that the Langmuir isotherm best describes the process with an adsorption capacity of 42.9 mg/g and that the adsorption kinetics follows the pseudosecond-order model. The calculated thermodynamic parameters showed that the adsorption is exothermic and spontaneous. The activation energy value (Ea) indicated that the retention is physisorptive in nature. The regeneration of the adsorbent was carried out by three eluents, among which HCl was the best. Finally, a brief cost estimation showed the great potential of coffee grounds as a low-cost adsorbent.

scholarly journals Confluence of montmorillonite and Rhizobium towards the adsorption of chromium(vi) from aqueous medium

RSC Advances ◽  
2019 ◽  
Vol 9 (49) ◽  
pp. 28478-28489
Author(s):  
T. Sathvika ◽  
Akhil Raj Kumar Saraswathi ◽  
Vidya Rajesh ◽  
N. Rajesh
Keyword(s):  
Aqueous Medium ◽  
Oxidation State ◽  
Chromium Vi ◽  
Sources Of Pollution

Chromium in its hexavalent oxidation state is carcinogenic and wastewater from the electroplating industry is one of the principal sources of pollution.

Chromium(vi) grafted mesoporous polyaniline as a reusable heterogeneous catalyst for oxidation reactions in aqueous medium

RSC Advances ◽  
2014 ◽  
Vol 4 (30) ◽  
pp. 15431 ◽  
Author(s):  
Usha Mandi ◽  
Malay Pramanik ◽  
Anupam Singha Roy ◽  
Noor Salam ◽  
Asim Bhaumik ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Heterogeneous Catalyst ◽  
Oxidation Reactions ◽  
Chromium Vi

Synthesis of highly visible light active TiO2-2-naphthol surface complex and its application in photocatalytic chromium(vi) reduction

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 39752-39759 ◽  
Author(s):  
Peramaiah Karthik ◽  
Ramalingam Vinoth ◽  
Sundaram Ganesh Babu ◽  
Meicheng Wen ◽  
Takashi Kamegawa ◽  
...  
Keyword(s):  
Visible Light ◽  
Aqueous Medium ◽  
Surface Complex ◽  
Chromium Vi ◽  
Photocatalytic System ◽  
Visible Light Active

Visible light active 2-naphthol functionalized TiO2 (TiO2-2-NAP) photocatalytic system is developed for the 100% reduction of Cr(vi) in aqueous medium.

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