A novel hybrid material for the trace removal of hexavalent chromium [Cr(VI)] from contaminated water

2018 ◽  
pp. 221-228
Keyword(s):  
Hexavalent Chromium ◽  
Hybrid Material ◽  
Contaminated Water ◽  
Trace Removal

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.

Purification of Contaminated Water with Chromium (VI) Using Pseudomonas aeruginosa

2016 ◽  
Vol 721 ◽  
pp. 143-148 ◽  
Author(s):  
Nora Noureddine ◽  
Samia Benhammadi ◽  
Fouad Kara ◽  
Hakim Aguedal ◽  
Abdelkader Iddou ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Hexavalent Chromium ◽  
Contact Time ◽  
Culture Broth ◽  
Contaminated Water ◽  
Toxic Heavy Metals ◽  
Initial Concentration ◽  
Chromium Vi ◽  
Batch System ◽  
Uncontaminated Soil

A bacterial strain Pseudomonas aeruginosa isolated from an uncontaminated soil has been used for the removal of hexavalent chromium (Cr (VI)). The experiments were carried out in batch system in a culture broth. The results obtained have shown that 100% of Cr (VI) are removed. Contact time, initial concentration of the hexavalent chromium, temperature, as well as the nature of the culture broth have influenced this elimination. To the initial concentration of 20g/L of Cr (VI) the elimination rates are lower, while the reverse occurs for an initial concentration of 8g/L. This study allows considering the use of Pseudomonas aeruginosa in the treatment of water polluted by toxic heavy metals such as Cr (VI).

Application of Chattim tree (devil tree,Alstonia scholaris) saw dust as a biosorbent for removal of hexavalent chromium from contaminated water

2012 ◽  
Vol 91 (5) ◽  
pp. 814-821 ◽  
Author(s):  
Rumpa Saha ◽  
Indrajit Saha ◽  
Rumki Nandi ◽  
Aniruddha Ghosh ◽  
Ankita Basu ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Contaminated Water ◽  
Saw Dust ◽  
Alstonia Scholaris

Immobilization of vegetable tannins on tannery chrome shavings and their use for the removal of hexavalent chromium from contaminated water

2011 ◽  
Vol 174 (1) ◽  
pp. 310-317 ◽  
Author(s):  
L. Chabaane ◽  
S. Tahiri ◽  
A. Albizane ◽  
M. El Krati ◽  
M.L. Cervera ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Contaminated Water ◽  
Vegetable Tannins

Surfactant-assisted bioremediation of hexavalent chromium from contaminated water

2013 ◽  
Vol 53 (3) ◽  
pp. 746-751 ◽  
Author(s):  
K. Mukherjee ◽  
R. Nandi ◽  
D. Saha ◽  
B. Saha
Keyword(s):  
Hexavalent Chromium ◽  
Contaminated Water ◽  
Surfactant Assisted

Bioremediation of hexavalent chromium contaminated water in fixed-film upflow reactors - a south african first

2010 ◽  
Vol 150 ◽  
pp. 269-269
Author(s):  
E. Botes ◽  
R. Jordan ◽  
M.F. deFlaun ◽  
J. Howell ◽  
R. Borch ◽  
...  
Keyword(s):  
South African ◽  
Hexavalent Chromium ◽  
Contaminated Water ◽  
Fixed Film

scholarly journals Iron(II) modified natural zeolites for hexavalent chromium removal from contaminated water

2016 ◽  
Vol 42 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Antonio Lofù ◽  
Piero Mastrorilli ◽  
Maria Michela Dell’Anna ◽  
Matilda Mali ◽  
Raffaello Sisto ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Continuous Flow ◽  
High Flow ◽  
Contaminated Water ◽  
Natural Zeolites ◽  
Flow Rates ◽  
European Regulation ◽  
Different Types ◽  
Ph Range ◽  
Cr Removal

Abstract Three different types of Fe(II)-modified natural zeolites were tested as supports in continuous-flow columns for the treatment of Cr(VI) contaminated water. The natural zeolites chosen as support were commercially available Zeosand (80% clinoptilolite), ATZ (79% phillipsite/chabazite), and ZS-55RW (90% Chabazite). All the examined modified zeolites turned out active for hexavalent chromium abatement, lowering its concentration below the European regulation level, even at relatively high flow rates (40 mL/h, linear velocity 15 cm/h). Zeosand, having a broader pH range of stability, was found to be the best one in terms of both Fe(II) uptake (0.54 wt%) and Cr removal (90 mg Cr/Kg zeolite).

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