Informatics Publishing Limited

Francis Andrade ¹, H. B. Aravinda ², E. T. Puttaiah ³

Affiliations
1 Dept. of Environmental Science, Kuvempu University, Shankeraghatta, Shimoga-577 451, Karnataka, IN
2 Dept. of Civil Engineering, Bapuji Institute of Engineering and Technology, Davangere-577 004, Karnataka, IN
3 Gulbarga University, Gulbarga-577 451, Karnataka, IN

Abstract

Mangalore coast is a stretch of about 22 Kms at the western part of the Western Ghats of the Indian peninsula. This area is receiving huge quantity of pollution load from the major industries and factories located nearby. This pollution load is discharged into the sea either directly or through the major west flowing rivers of the region, Nethravathi and Gurupura. The pollution load includes runoff of the sediment, waste from oil refineries, nutrients and pesticides, iron ore residues from the nearby iron are company and chemicals from the chemical factory from the point source. Water quality is also altered due to the addition of municipal and sewage wastes discharged into the sea. The pollutants encountered include both the biodegradable (vegetable waste&dead fish) and non-biodegradable (plastic bags, cans and metal materials). The samples analyzed for the various physico-chemical parameters revealed the alkaline condition and low in dissolved oxygen concentration. The concentration of these components were compared with WHO standards and found to be deviated highly.

Keywords

Mangalore, Coastal Pollution, Sediment, Pesticide, Water Quality, Human Environment

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Francis Andrade ¹, H. B. Aravinda ², E. T. Puttaiah ¹

Affiliations
1 Deptt. of Environmental Science, Kuvempu University, Shankeraghatta-577 451, Distt. Shimoga, Karnataka, IN
2 Deptt. of Civil Engineering, Bapuji Institute of Engineering and Technology, Davangere-577 004, Karnataka, IN

Abstract

Mangalore coast is present at the western part of the Western Ghats of the Indian peninsula located at 12°49'N and stretched to about 22 kms. This region is meant for many useful and convenient sources for the development of the country's economy. Because of its scenic beauty, it attracts huge crowd of tourists across the globe. Along with the tourism, this coastal region also receives pollution load from the various industries located nearby. The preliminary study carried out at the coastal region of Mangalore by considering six randomly selected study sites, located at points where river water enters the sea. Various parameters of water analysis in these study sites have revealed differences from one site to the other. The mean values of the estimated characteristics were represented graphically. These values prompt to carry out further research to substantiate using statistical methods.

Keywords

Mangalore Coastal Waters, Physicochemical, Characterisrics, Pollution.

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H. Karibasappa ¹, H. B. Aravinda ¹, S. Manjappa ¹

Affiliations
1 Department of Civil Engineering, Adhiyamaan College of Engineering, Hosur-635 109, T.N., IN

Abstract

The present concern for eutrophication relates to the rapidly increasing quantities of nitrogen and phosphorus which are otherwise present at fairly low concentrations in unmodified natural waters to limit the algal growth and biomass. In the present study an attempt has been made to measure the level of eutrophication in Hosur town lakes. Three lakes namely Chandrakudi lake, Doddan lake and Kelavarapalli dam were selected for the study. The samples were collected and analysed for soluble orthophosphate, chemical oxygen demand, organic nitrogen, free ammonia, inorganic nitrogen, total phosphorus and dissolved oxygen, etc. The onsite study like transparency, fish kill information and impairment of lakes, etc. was also conducted. The level of eutrophication in the lakes was calculated by using Wetzel's scheme. The results revealed that the eutrophication level in all the three lakes is very high, i.e., hypereutrophic to very eutrophic.

Keywords

Eutrophication, Nutrients, Nitrogen, Phosphorus, Hosur Town Lakes.

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M. Mamatha ¹, H. B. Aravinda ², E. T. Puttaiah ³, S. Manjappa ⁴

Affiliations
1 Department of Chemical Engineering, Bapuji Institute of Engineering and Technology, Davangere, Karnataka, IN
2 Department of Civil Engineering, Bapuji Institute of Engineering and Technology, Davangere, Karnataka, IN
3 Gulbarga University, Gulbarga, IN
4 Department of Chemistry, Bapuji Institute of Engineering and Technology, Davangere, Karnataka, IN

Abstract

In the recent years, Pongamia pinnata trees are widely grown at farms for its seeds utilised for biofuel activities. Due to the easy availability of this tree bark, it is used as a viable adsorbent for removing some heavy metals from aqueous and waste water. In this context, the adsorption of Zinc on prepared adsorbent is very effective. In this study, investigations were made for the adsorption of zinc ions from aqueous and waste water. Batch adsorption studies to determine the optimum conditions of zinc ion removal were conducted to know the influence of experimental conditions such as pH of the solution, metal ion concentration, amount of adsorbent and contact time at room temperature. The results obtained show that the optimum pH range for the zinc removal is 5 – 5.4 and adsorption percent is higher than 95 %. Kinetic study was also made to determine rate constants.

Keywords

Adsorbent, Adsorption Isotherms, Effluent, Kinetics, Pongamia pinnata, Zinc.

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