Application of magnetic extractant for the removal of hexavalent chromium from aqueous solution in high gradient magnetic separator

2012 ◽  
Vol 183 ◽  
pp. 339-348 ◽  
Author(s):  
Qiang Wang ◽  
Yueping Guan ◽  
Xiufeng Ren ◽  
Mingzhu Yang ◽  
Xiang Liu
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Magnetic Separator ◽  
High Gradient

A High-Gradient Magnetic Separation System for Separating Magnetic Nanobeads from Aqueous Solution

2012 ◽  
Vol 505 ◽  
pp. 39-43
Author(s):  
Xiao Fei Yan ◽  
Jian Han Lin ◽  
Rong Hui Wang ◽  
Mao Hua Wang ◽  
Dong An ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Magnetic Separation ◽  
Flow Rate ◽  
Separation System ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Separation Time ◽  
Electronic Timer ◽  
Magnetic Nanobeads

Magnetic separation is an emerging and promising technology in biological sample preparation. In this paper, a high-intensity and high-gradient magnetic separation system was developed to separate magnetic nanobeads from aqueous solution. This system mainly consisted of a magnetic separator, a micropump and an electronic timer. The magnetic separator was designed by placing two columns of permanent magnets in an aluminum holder. Two magnets in each column were laid out in repelling mode and a hole between the two columns was used to accommodate a 1.5 ml tube. Working with the electronic timer, the micropump was employed to remove waste solution at a certain rate after magnetic nanobeads captured onto the sides of the tube wall. The experiments for separation of magnetic nanobeads with diameters of 150 nm and 50 nm using the developed magnetic separation system were conducted to optimize the key parameters of the system including nanobeads concentration, separation time and flow rate. The separation efficiencies of magnetic nanobeads increased as the nanobeads concentration and the separation time increased, whereas decreased when the flow rate was increased. Experimental results proved that the proposed magnetic separation system was able to separate magnetic nanobeads (diameters of 150 nm and 50 nm) with separation efficiencies of 99% and 90% in 30 min and 150 min respectively.

Breakthrough analysis for hexavalent chromium removal from drinking water in a fixed bed column

2009 ◽  
Vol 9 (6) ◽  
pp. 661-670 ◽  
Author(s):  
S. P. Dubey ◽  
K. Gopal
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Fixed Bed ◽  
Entropy Change ◽  
Spectroscopic Technique ◽  
Fixed Bed Column ◽  
Chromium Vi ◽  
Fixed Bed Adsorption ◽  
Optimal Column ◽  
Eucalyptus Bark

The activated carbon of Eucalyptus globulus was tested for their effectiveness in removing hexavalent chromium from aqueous solution using column experiments. Result revealed that adsorption of chromium(VI) on eucalyptus bark carbon was endothermic in nature. Thermodynamic parameters such as the entropy change, enthalpy change and Gibbs free energy change were found to be 1.39 kJ mol−1 K−1, 1.08 kJ mol−1 and −3.85 kJ mol−1, respectively. Different chromium concentrations were used for the fixed bed adsorption studies. The pre- and post-treated adsorbents were characterized using a FTIR spectroscopic technique. It was concluded that Eucalyptus bark carbon column could be used effectively for removal of hexavalent chromium from aqueous solution at optimal column conditions. This study showed that this biological material is potential adsorbent of Cr(VI) from water.

Biosorption of hexavalent chromium from aqueous solution using chemically modifiedSpirulina platensisalgal biomass: an ecofriendly approach

2015 ◽  
Vol 57 (18) ◽  
pp. 8504-8513 ◽  
Author(s):  
Shubha M. Hegde ◽  
R.L. Babu ◽  
E. Vijayalakshmi ◽  
Rajeshwari H. Patil ◽  
M. Naveen Kumar ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium

scholarly journals Development of A Continuous Chamber High-Gradient Magnetic Separator With A Strong Field

2002 ◽  
Vol 11 (1-2) ◽  
pp. 93-105
Author(s):  
V. I. Karmazin ◽  
V. V. Karmazin ◽  
V. A. Bardovskiy ◽  
O. V. Zamytskiy
Keyword(s):  
Strong Field ◽  
Magnetic Separator ◽  
High Gradient
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