Volume 5, Issue 3 (21 2012)
ijhe 2012, 5(3): 355-366 |
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Massoudinejad M R, Sharifi H, Mazaheri Tehrani A. Investigation the Efficiency of Electrolysis Process using 3 Dimensional Graphite Electrodes for Decolonization of Phenolphthalein and Phenol red from Aqueous Environments. ijhe 2012; 5 (3) :355-366
URL: http://ijhe.tums.ac.ir/article-1-17-en.html
URL: http://ijhe.tums.ac.ir/article-1-17-en.html
1- , massoudi@sbmu.ac.ir
Abstract: (15068 Views)
MicrosoftInternetExplorer4 Background and Objectives: The presence of chemical dyes in the water resources not
only pollutes them, but also brings about death of organisms and serious
indemnities to the environment through stopping oxygen production and preventing
penetration of the sunlight. In this study, we investigated the efficiency of
the electrolysis process for decolonization of phenolphthalein and phenol red
from aqueous environment.
Materials and Methods: The experiments were conducted in an electrochemical reactor having a working volume of 1 liter equipped with 2 graphite electrodes. This study was conducted at laboratory scale. Samples were prepared by dissolving two phenol red and phenolphthalein dyes in drinking water. Then, the effect of operating parameters such as voltage, inter-electrode distance, and NaCl concentration on the complete dye removal was determined considering optimum retention time using Factorial variance analyses and the graphs were plotted using MS Excel software.
Results: the results showed that the optimum conditions for completely removal of phenolphthalein was achieved applying a voltage of 48 V, the retention time of 9 minutes, 5 cm inter-electrode distance, and the salt concentration of 1.5 g/l, whereas, complete removal of phenol red was achieved applying a voltage of 48 V, the retention time of 8 minutes, 5 cm inter-electrode distance, and the salt concentration of 2 g/l. Under these conditions, COD removal efficiency for phenol red and phenolphthalein was 85 and 80 percent respectively.
Conclusion: This study revealed that electrolysis process is an effective method to remove both phenolphthalein and phenol red dyes from effluent, because it can completely remove the dyes in a short time.
Materials and Methods: The experiments were conducted in an electrochemical reactor having a working volume of 1 liter equipped with 2 graphite electrodes. This study was conducted at laboratory scale. Samples were prepared by dissolving two phenol red and phenolphthalein dyes in drinking water. Then, the effect of operating parameters such as voltage, inter-electrode distance, and NaCl concentration on the complete dye removal was determined considering optimum retention time using Factorial variance analyses and the graphs were plotted using MS Excel software.
Results: the results showed that the optimum conditions for completely removal of phenolphthalein was achieved applying a voltage of 48 V, the retention time of 9 minutes, 5 cm inter-electrode distance, and the salt concentration of 1.5 g/l, whereas, complete removal of phenol red was achieved applying a voltage of 48 V, the retention time of 8 minutes, 5 cm inter-electrode distance, and the salt concentration of 2 g/l. Under these conditions, COD removal efficiency for phenol red and phenolphthalein was 85 and 80 percent respectively.
Conclusion: This study revealed that electrolysis process is an effective method to remove both phenolphthalein and phenol red dyes from effluent, because it can completely remove the dyes in a short time.
Type of Study: Research |
Subject:
General
Received: 2012/04/2 | Accepted: 2012/07/1 | Published: 2012/10/13
Received: 2012/04/2 | Accepted: 2012/07/1 | Published: 2012/10/13
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