The residue of alginate extraction from Sargassum muticum (Brown seaweed) as a low-cost adsorbent for hexavalent chromium removal from aqueous solutions

2017 ◽  
Vol 75 ◽  
pp. 107-114 ◽  
Author(s):  
Z. Belattmania ◽  
S. Tahiri ◽  
F. Bentiss ◽  
A. Sahibed-dine ◽  
C. Jama ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Low Cost ◽  
Brown Seaweed ◽  
Sargassum Muticum ◽  
Chromium Removal ◽  
Alginate Extraction

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.

scholarly journals Hexavalent Chromium Removal from Groundwater—A Low-Tech Approach

2020 ◽  
Vol 2 (1) ◽  
pp. 25
Author(s):  
Samiotis Georgios ◽  
Lefteri Lefteris ◽  
Mavromatidou Charoula ◽  
Tsioptsias Costas ◽  
Trikilidou Eleni ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Low Cost ◽  
Water Bodies ◽  
Contaminated Water ◽  
Chromium Removal ◽  
Chromium Reduction ◽  
Complete Understanding ◽  
Pump And Treat ◽  
Reduction Mechanisms ◽  
The Creation

Chromium occurs in nature mainly in its trivalent or hexavalent form. Hexavalent chromium Cr(VI) is particularly toxic to humans, animals, and plants. The extensive pollution of groundwaters with Cr(VI) necessitates the complete understanding of natural chromium oxidation and reduction mechanisms, both for assessing the risk of hexavalent chromium formation and for the development of techniques for the reduction and removal of Cr(VI) from contaminated water bodies. In this work, the possibility of hexavalent chromium reduction by discarded or low-cost materials, which contain reducing compounds, is investigated regarding the creation of a compact, pump-and-treat filter for Cr(VI) removal from groundwater.

scholarly journals Recent advances in hexavalent chromium removal from aqueous solutions by adsorptive methods

RSC Advances ◽  
2019 ◽  
Vol 9 (45) ◽  
pp. 26142-26164 ◽  
Author(s):  
Vusumzi E. Pakade ◽  
Nikita T. Tavengwa ◽  
Lawrence M. Madikizela
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Chromium Removal ◽  
Recent Advances

Despite the extensive existence of adsorbents for Cr(vi) removal from aqueous solutions, new adsorbents and modification of existing adsorbing materials are continuously sought after.

Hexavalent chromium removal from aqueous solutions by a novel powder prepared fromColocasia esculentaleaves

2016 ◽  
Vol 18 (8) ◽  
pp. 812-821 ◽  
Author(s):  
E. Nakkeeran ◽  
N. Saranya ◽  
M.S. Giri Nandagopal ◽  
A. Santhiagu ◽  
N. Selvaraju
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Chromium Removal

Core-Shell Bimagnetic Nanoadsorbents for Hexavalent Chromium Removal from Aqueous Solutions

2019 ◽  
Vol 362 ◽  
pp. 82-91 ◽  
Author(s):  
Alex Fabiano Cortez Campos ◽  
Helena Augusta Lisboa de Oliveira ◽  
Fabiana Narciso da Silva ◽  
Franciscarlos Gomes da Silva ◽  
Priscilla Coppola ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Core Shell ◽  
Chromium Removal

Porous stainless steel supported magnetite crystalline membranes for hexavalent chromium removal from aqueous solutions

2012 ◽  
Vol 392-393 ◽  
pp. 150-156 ◽  
Author(s):  
Wenzhi Tang ◽  
Zhichao Peng ◽  
Lixuan Li ◽  
Tianli Yue ◽  
Jianlong Wang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Chromium Removal ◽  
Porous Stainless Steel
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