Adsorption of Hexavalent Chromium Ions by Organic-Inorganic Hybrid Mesoporous Material in Aqueous Solution

2012 ◽  
Vol 518-523 ◽  
pp. 854-859
Author(s):  
Yan Yan Zhang ◽  
Dong Quan Du ◽  
Liu Yi Zhang ◽  
Cai Yun Han ◽  
Si Wei Xu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Mesoporous Material ◽  
Orthogonal Experiment ◽  
Organic Component ◽  
Experimental Conditions ◽  
Inorganic Hybrid ◽  
Chromium Ions

This paper reports the adsorption of Cr(VI) ions from aqueous solution by organic-inorganic hybrid mesoporous material. Adsorbents were prepared with the DTAB,TTAB,CTAB and STAB for organic component synthesis organic-inorganic hybrid mesoporous material(HM), namely HMD, HMT, HMC and HMS. The best adsorption hexavalent chromium experimental conditions is obtained after having orthogonal experiment.

Catalytic Degradation of Azo Dye Congo Red in Aqueous Solution by LiMn2O4

2013 ◽  
Vol 634-638 ◽  
pp. 500-503
Author(s):  
Yun Hui Long ◽  
Jun Ming Guo ◽  
Du Shu Huang ◽  
Gui Yang Liu
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Azo Dye ◽  
Orthogonal Experiment ◽  
Catalytic Degradation ◽  
Spinel Limn2o4 ◽  
Experimental Conditions ◽  
Initial Ph ◽  
Degradation Of Azo Dye

Catalytic degradation of azo dye Congo red in aqueous solution by spinel LiMn2O4 was studied. Degradation conditions were also optimized by orthogonal experiment. The results showe that the optimal degradation experimental conditions are: The initial pH is 3.0; The amount of catalyst is 10.0 mg; The amount of 30% H2O2 is 2.00 mL. The decolourization ratio of 20 mL 20 mg/L Congo red solution is 85.95%.

Removal of hexavalent chromium ions from aqueous solution by amidoxime functionalized wool fibers

2017 ◽  
Vol 58 ◽  
pp. 137-143 ◽  
Author(s):  
Qiaoyu Li ◽  
Zhonglong Yin ◽  
Min Chen ◽  
Sheng Hu ◽  
Haiming Cheng
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Chromium Ions ◽  
Wool Fibers

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.

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