Nature Environment and Pollution Technology

M. Vasanthy ¹, A. Geetha ¹, M. Jeganathan ¹, A. Anitha ¹

Affiliations
1 Department of Environmental Sciences, Government Arts College, Ariyalur-621 703, Tamil Nadu, IN

Abstract

The present study deals with the evaluation of quality of groundwater at different locations of Ariyalur town, Tamil Nadu. Groundwater samples were collected from ten different locations of the town. The groundwater quality parameters such as pH, EC, temperature, dissolved oxygen, alkalinity, acidity, hardness, calcium, magnesium, silicate, phosphate, nitrate and sulphate were estimated in the samples to evaluate their quality. The results indicate that the waters have grossly high values of hardness and alkalinity, which reduces the quality of water for drinking.

Keywords

Drinking Water Quality, Ariyalur Area, Groundwater, Drinking Water Standards.

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M. Vasanthy ¹, A. Geetha ¹, G. Seethadevi ¹

Affiliations
1 PG & Research Department of Environmental Sciences, Government Arts and Science College, Ariyalur-621 713, T. N., IN

Abstract

Removal of reactive dyes from aqueous solution was investigated using bacterial species from dyeing industry effluents. The decolorization was achieved at different dye concentrations, pH and temperature. It was caused by bacterial species such as Enterobacter sp. (GS5), Escherichia coli (GS3) and Bacillus sp. (GS10) and their consortia. More reliable and effective decolorization rates were obtained with 100% Enterobacter sp. (GS5) after 96 hours at 10 and 20 ppm. Decolorization has been maximum in the static experimental conditions.

Keywords

Dyeing Industry Effluent, Reactive dye (Red RB), Enterobacter sp. (GS5), Escherichia coli (GS3), Bacillus sp. (GS10), Decolourisation.

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M. Vasanthy ¹, S. Murugavel ², A. Geetha ¹

Affiliations
1 PG & Research Deptt. of Environmental Sciences, Government Arts College, Ariyalur-621 713, T.N., IN
2 Department of Environmental Management, Jawahar Science College, Neyveli, T.N., IN

Abstract

Though industries promote economy of the country, the pollution caused by them has to be controlled in order to save the environment from degradation. The present work has been aimed for the removal and reduction of chemical oxygen demand (COD) and total dissolved solids (TDS) of the dyeing industry effluent using oxidizing and coagulating agents, and adsorbent individually and in different combinations. About 0.25, 0.50, 0.75 and 1.00 g of oxidizing agent (sodium hypochlorite), coagulating agent (alum) and adsorbent (commercial activated carbon, CAC) were added separately and in combinations. The COD (92.3%) and TDS (80%) were removed using 0.25g of oxidizing agent within one hour, and with 1 g of coagulating agent the COD and TDS were removed 98.4 % and 90% respectively. For CAC it has been reported that the dosage of 0.75 g has resulted in 87.6 % and 80% of COD and TDS removal respectively. With the combination of sodium hypochlorite, CAC and alum, the percentage reduction of COD and TDS are 87% and 79% respectively. The statistical analysis revealed a positive correlation between reduction and the time.

Keywords

Dyeing Industry Effluent, Treatment Methods, Oxidizing Agent, Coagulant, Adsorbent, Sodium Hypochlorite, Activated Carbon, Alum.

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M. Vasanthy ¹, A. Geetha ¹

Affiliations
1 P.G. and Research Department of Environmental Sciences, Govt. Arts College, Ariyalur-621 713, Tamil Nadu, IN

Abstract

Phytoremediation refers to a set of technologies that use different plants as a containment technique. This technology is receiving attention lately. As the results from field trials, it indicates that it is a cost saving technique compared to conventional treatment. The present investigation has helped to understand about the phytoremediation capacity of Hydrilla verticillata to remove colour from the aqueous dye solution. The colour has been completely removed from 10 and 20 ppm aqueous Direct Black E solution after 96 hrs, and from 50 ppm solution after 5 days. Thus, the study helps us to understand the possibility of bioremediation of dyeing industry effluent using Hydrilla verticillata. The recycling and reuse of Direct dye containing dyeing industry effluents would be possible in the days to come.

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