scholarly journals Sequestration of Hexavalent Chromium from Aqueous Medium Using Biochar Prepared from Water Hyacinth Biomass

2018 ◽  
Vol 22 (3) ◽  
pp. 1-15
Author(s):  
R Premalatha ◽  
E Parameswari ◽  
P Malarvizhi ◽  
S Avudainayagam ◽  
V Davamani
Keyword(s):  
Aqueous Medium ◽  
Hexavalent Chromium ◽  
Water Hyacinth

Photocatalytic degradation of hexavalent chromium and different staining dyes by ZnO in aqueous medium under UV light

2021 ◽  
pp. 100508
Author(s):  
Mrunal V. Kangralkar ◽  
J. Manjanna ◽  
Naeemakhtar Momin ◽  
K.S. Rane ◽  
G.P. Nayaka ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Aqueous Medium ◽  
Hexavalent Chromium ◽  
Uv Light

Aggregation of Surfactants: Catalytic Reinforcement in Oxidation of Unsaturated E-Crotonaldehyde

2021 ◽  
Vol 58 (4) ◽  
pp. 293-302
Author(s):  
Atanu Rakshit ◽  
Suman Chowdhury ◽  
Animesh Acharjee ◽  
Kuheli Dome ◽  
Kripasindhu Karmakar ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Hexavalent Chromium ◽  
Aliphatic Aldehyde ◽  
Product Formation ◽  
Order Reaction ◽  
Spectrophotometric Measurement ◽  
Reaction Condition ◽  
Mechanistic Approach ◽  
Kinetics Of ◽  
Catalyzed Oxidation

Abstract In this work, the kinetics of the micellar catalyzed oxidation of the unsaturated aliphatic aldehyde, E-crotonaldehyde in aqueous medium under pseudo 1st-order reaction condition was spectrophotometrically investigated at 25 °C. In the spectrophotometric measurement, the rate of the reaction was recorded by the decreasing intensity of the metallic oxidant, hexavalent chromium [Cr(VI)], in acidic aliquots at 450 nm with varying concentration of surfactants and/or heteroaromatic promoters. Spectral evidences have been produced in favour of the mechanistic approach and the product formation.

scholarly journals Kinetics and Isotherm Studies on Adsorption of Hexavalent Chromium Using Activated Carbon from Water Hyacinth

2021 ◽  
Vol 15 (1) ◽  
pp. 1-8
Author(s):  
Angelica Macalalad ◽  
◽  
Quennie Rose Ebete ◽  
Dominic Gutierrez ◽  
Madelaine Ramos ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Hexavalent Chromium ◽  
Water Hyacinth ◽  
Freundlich Isotherm ◽  
Second Order ◽  
Order Kinetic ◽  
Adsorbate Concentration ◽  
Order Kinetic Model ◽  
Pseudo Second Order

The present study is focused on the use of activated carbon derived from water hyacinth (WH-AC) as adsorbent for the removal of Cr(VI) from aqueous solution. The optimized WH-AC was found to be mesoporous and considered as granular. The surface area of 11.564 m2/g was found to have a good adsorption capacity. The adsorption data of the optimized WH-AC followed a pseudo-second order kinetics and the Freundlich isotherm model. Based on the correlation coefficient obtained from pseudo-second-order kinetic model, the R2 values were all above 0.99, which is closer to unity of one (1) indicating that it followed a chemisorption process. The adsorption capacity of WH-AC increased from 1.98 to 4.68 mg/g when adsorbate concentration increased from 20 to 50 mg/l. The overall study proved that the adsorption by activated carbon derived from water hyacinth can be an alternative and efficient technique in hexavalent chromium removal.

scholarly journals Biosorption of Hexavalent Chromium from Aqueous Medium with the Antibiotic Residue

2015 ◽  
Vol 7 (2) ◽  
pp. 120-128 ◽  
Author(s):  
Sun Xining ◽  
Mi Jingjing ◽  
Zhang Zengqiang ◽  
Zhang Zhiyong
Keyword(s):  
Aqueous Medium ◽  
Hexavalent Chromium ◽  
Antibiotic Residue

scholarly journals Environmental Remediation of Hexavalent Chromium in Aqueous Medium Using Fe(II)-Montmorillonite as Reductant

2015 ◽  
Vol 11 ◽  
pp. 275-283 ◽  
Author(s):  
M. Vinuth ◽  
H.S. Bhojya Naik ◽  
K. Chandra sekhar ◽  
Jayappa Manjanna ◽  
B.M. Vinoda
Keyword(s):  
Aqueous Medium ◽  
Hexavalent Chromium ◽  
Environmental Remediation

Reduction of Hexavalent Chromium in Aqueous Medium with Zerovalent Iron

2010 ◽  
Vol 82 (2) ◽  
pp. 138-146 ◽  
Author(s):  
Ratnadeepa Dutta ◽  
Sk. Saker Mohammad ◽  
Sampa Chakrabarti ◽  
Basab Chaudhuri ◽  
Sekhar Bhattacharjee ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Hexavalent Chromium ◽  
Zerovalent Iron
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