In the cities where the textile industry is flourishing, dye waste waters were being disposed on lands. Now, through leaching, it has reached aquifers and polluted them. All the hand pumps and well water being used for domestic/irrigation purposes is affected with colors. Can decoloration of these polluted aquifers be done?
Thanks Dr Roland Iosif Moraru, I appreciate your answer but my concern is for polluted aquifer. Thanks
Abstract: Dye wastes represent one of the most problematic groups of pollutants because they can be easily identified by the human eye and are not easily biodegradable. This literature review paper highlights and provides an overview of dye waste treatments performed over the three years period from 2008–2010. Noteworthy processes for the treatment of dye waste include biological treatment, catalytic oxidation, filtration, sorption process and combination treatments
Dye Waste Treatment
Siew-Teng Ong Pei-Sin Keng, Weng-Nam Lee,, Sie-Tiong Ha, and Yung-Tse Hung
Water 2011, 3, 157-176;
Hi Maddali V S Murali Krishna; Thanks for your reply. I will go through the link you sent. As you are talking about it seems that it may be for reclamation of dye waste waters available on surface. Here I am talking about a polluted aquifer. Thanks
I hope this paper will help you. Please, have a look an abstract, below...
Qamar M., Gondal M.A., Hayat K., Yamani Z.H., Al-Hooshani K. Laser-induced removal of a dye C.I. Acid Red 87 using n-type WO3 semiconductor catalyst. J. Hazard Mater. 2009. Vol. 170 (2-3). P. 584-549. doi: 10.1016/j.jhazmat.2009.05.099
Water contamination by organic substances such as dyes is of great concern worldwide due to their utilization in many industrial processes and environmental concerns. To cater the needs for waste water treatment polluted with organic dyes, laser-induced photocatalytic process was investigated for removal of a dye derivative namely Acid Red 87 using n-type WO3 semiconductor catalyst. The degradation was investigated in aqueous suspensions of tungsten oxide under different experimental conditions using laser instead of conventional UV lamp as an irradiation source. The degradation process was monitored by measuring the change in dye concentration as a function of laser irradiation time by employing UV spectroscopic analysis. The degradation of dye was studied by varying different parameters such as laser energy, reaction pH, substrate concentration, catalyst concentration, and in the presence of electron acceptors such as hydrogen peroxide (H2O2), and potassium bromate (KBrO3). The degradation rates were found to be strongly dependent on all the above-mentioned parameters. Our experimental results revealed that the dye degradation process was very fast (within few minutes) under laser irradiation as compared to conventional setups using broad spectral lamps (hours or days) and this laser-induced photocatalytic degradation method could be an effective means to eliminate the pollutants present in liquid phase. The experience gained through this study could be beneficial for treatment of waste water contaminated with organic dyes and other organic pollutants.
Dear Prof. Vladimir A. Kulchitsky; Thanks for your elaborated answer. regards
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