P Ravikumar - Profile on Academia.edu (original) (raw)

Papers by P Ravikumar

Quantification of radon concentration in groundwater around abandoned Gogi uranium mineralized zone, Yadagir district, Karnataka, India

Journal of Radioanalytical and Nuclear Chemistry, 2021

Radon activity concentrations have been measured by analysing a total of 93 bore well water sampl... more Radon activity concentrations have been measured by analysing a total of 93 bore well water samples, geographically spread over three taluks of Yadagir district. The analysis involved usage of Durridge’s RAD7 radon analyser equipment with RAD-H2O accessories by closed loop aeration concept. Having geometric mean concentrations of 37.0, 20.75 and 9.98 Bq/L, radon concentration in 5.71, 14.29 and 6.67% groundwater samples from Yadagir (8.88 Bq/L < Rn < 160 Bq/L), Shahapur (1.98 Bq/L < Rn < 591 Bq/L) and Surpur (0.586 Bq/L < Rn < 206 Bq/L) taluks respectively exceeded the alternative maximum contaminant level (AMCL) of the USEPA (148 Bq/L). Nearly 15% of the groundwater samples had radon concentrations higher than WHO reference level of 100 Bq/L. The calculated total annual effective dose in 38.71, 44.09, and 55.92% of the samples respectively for infants, children and adults was not in consistent with WHO recommended dose level of 100 µSv/y.

Radon in Chitradurga GW - final reprint

Radon concentration in groundwater of Varahi and Markandeya river basins, Karnataka State, India

Journal of Radioanalytical and Nuclear Chemistry, 2010

Page 1. Radon concentration in groundwater of Varahi and Markandeya river basins, Karnataka State... more Page 1. Radon concentration in groundwater of Varahi and Markandeya river basins, Karnataka State, India RK Somashekar • P. Ravikumar Received: 9 March 2010 / Published online: 1 May 2010 Ó Akadémiai Kiadó, Budapest, Hungary 2010 ...

Kathmandu University Journal of Science, Engineering and Technology, 2010

Cauvery River is the major river system of south India was studied for 19 prime physicochemical a... more Cauvery River is the major river system of south India was studied for 19 prime physicochemical and 2 bacteriological parameters at six locations of the Kollegal stretch, for a period of Two years (2006)(2007)(2008) at monthly intervals. Over the years of time, river has been subjected to human interference regularly and water quality was to be getting deteriorated profoundly. Major anthropogenic activities practiced in and around the stretch: agriculture, abstraction of water for irrigation and drinking, washing cloths and utensils, discharging of sewage waste, sand dredging, boating, fishing, open defecation and religious ritual activities along the stretch were generating serious threat to the biota of the river by altering the physicochemical and biological concentration of the river system. The seasonal and yearly trends were discussed to comprehend anthropogenic interferences on the river stretch. Correlation analysis was also been tried in between physico-chemical parameters. The pH, Conductance, Alkalinity and Hardness levels indicate the moderate quality of water. The values of DO, BOD and COD levels indicate the absence of major organic pollution sources. Seasonal and yearly averages of plant nutrients like phosphate, nitrates, potassium and also sulphates at drain out falls and mixing zones, were not showing any significant variation in their concentration indicate no sign of problems like eutrophication, which is generally raise due to agricultural and sewage wastes. The other possibility is that since there are no major industries in the project area, the major source of organic pollutants is only the domestic source. Population density spread over sparsely located villages like Dasanapura and Harle certainly contributes towards total and fecal coliforms as excreta of the villagers due to lack of toilets in their houses. Thus present study concludes that river water was not polluted; all results are within permissible limit when compared with Bureau of Indian Standards (BIS) and National River water quality standards.

Quantification of radon concentration in groundwater around abandoned Gogi uranium mineralized zone, Yadagir district, Karnataka, India

Journal of Radioanalytical and Nuclear Chemistry, 2021

Radon activity concentrations have been measured by analysing a total of 93 bore well water sampl... more Radon activity concentrations have been measured by analysing a total of 93 bore well water samples, geographically spread over three taluks of Yadagir district. The analysis involved usage of Durridge’s RAD7 radon analyser equipment with RAD-H2O accessories by closed loop aeration concept. Having geometric mean concentrations of 37.0, 20.75 and 9.98 Bq/L, radon concentration in 5.71, 14.29 and 6.67% groundwater samples from Yadagir (8.88 Bq/L < Rn < 160 Bq/L), Shahapur (1.98 Bq/L < Rn < 591 Bq/L) and Surpur (0.586 Bq/L < Rn < 206 Bq/L) taluks respectively exceeded the alternative maximum contaminant level (AMCL) of the USEPA (148 Bq/L). Nearly 15% of the groundwater samples had radon concentrations higher than WHO reference level of 100 Bq/L. The calculated total annual effective dose in 38.71, 44.09, and 55.92% of the samples respectively for infants, children and adults was not in consistent with WHO recommended dose level of 100 µSv/y.

Radon in Chitradurga GW - final reprint

Radon concentration in groundwater of Varahi and Markandeya river basins, Karnataka State, India

Journal of Radioanalytical and Nuclear Chemistry, 2010

Page 1. Radon concentration in groundwater of Varahi and Markandeya river basins, Karnataka State... more Page 1. Radon concentration in groundwater of Varahi and Markandeya river basins, Karnataka State, India RK Somashekar • P. Ravikumar Received: 9 March 2010 / Published online: 1 May 2010 Ó Akadémiai Kiadó, Budapest, Hungary 2010 ...

Kathmandu University Journal of Science, Engineering and Technology, 2010

Cauvery River is the major river system of south India was studied for 19 prime physicochemical a... more Cauvery River is the major river system of south India was studied for 19 prime physicochemical and 2 bacteriological parameters at six locations of the Kollegal stretch, for a period of Two years (2006)(2007)(2008) at monthly intervals. Over the years of time, river has been subjected to human interference regularly and water quality was to be getting deteriorated profoundly. Major anthropogenic activities practiced in and around the stretch: agriculture, abstraction of water for irrigation and drinking, washing cloths and utensils, discharging of sewage waste, sand dredging, boating, fishing, open defecation and religious ritual activities along the stretch were generating serious threat to the biota of the river by altering the physicochemical and biological concentration of the river system. The seasonal and yearly trends were discussed to comprehend anthropogenic interferences on the river stretch. Correlation analysis was also been tried in between physico-chemical parameters. The pH, Conductance, Alkalinity and Hardness levels indicate the moderate quality of water. The values of DO, BOD and COD levels indicate the absence of major organic pollution sources. Seasonal and yearly averages of plant nutrients like phosphate, nitrates, potassium and also sulphates at drain out falls and mixing zones, were not showing any significant variation in their concentration indicate no sign of problems like eutrophication, which is generally raise due to agricultural and sewage wastes. The other possibility is that since there are no major industries in the project area, the major source of organic pollutants is only the domestic source. Population density spread over sparsely located villages like Dasanapura and Harle certainly contributes towards total and fecal coliforms as excreta of the villagers due to lack of toilets in their houses. Thus present study concludes that river water was not polluted; all results are within permissible limit when compared with Bureau of Indian Standards (BIS) and National River water quality standards.