Kuvempu University

About: Kuvempu University is a education organization based out in Shimoga, India. It is known for research contribution in the topics: Cyclic voltammetry & Carbon paste electrode. The organization has 1575 authors who have published 2210 publications receiving 39755 citations. The organization is also known as: KU.

Synthesis and characterization of organomodified Na-MMT using cation and anion surfactants

Abstract: The Sodium Montmorillonite (Na-MMT) is not susceptible to polymer due to its organophilic character and low basal spacing The primary objective of this study was to improve Na-MMT platelets separation by organically modifying it with cation and anion exchanges using Cetyl trimethyl ammonium bromide (CTAB) and Sodium dodecyl sulfate (SDS) respectively Basal spacing, presence of functional groups, Zetapotential with particle size analysis and thermal stability of the Organomodified Na-MMT (OMMT) were characterized using XRD, FTIR, zeta-potential analyzer and TGA respectively The basal spacing of CTAB modified OMMTincreased to 195 A from 110 A which corresponds to the basal spacing of Na-MMT The SDS modified OMMT did not show any increase in the basal spacing FTIR spectra of CTAB modified Na-MMT illustrated the attachment of CTAB functional groups to Na-MMT, while the same was absent in the case of SDS modified Na-MMT The zeta-potential of Na-MMT shifted from −2488 mV to 1566 mV in the case of CTAB modified Na-MMT and 1249 mV for SDS modified Na-MMT, indicating a greater surface potential of the modified nanoclay The TGA showed greater weight loss for CTAB modified Na-MMT than that for Na-MMT, indicating the effective Na+ ion exchange with alkyl amines

Measurement of radon concentration in drinking water of Shimoga district, Karnataka, India

Abstract: This paper presents the distribution of radon activity concentration in drinking water samples and their annual effective dose exposure in Shimoga district. The radon concentrations in 38 drinking water samples were measured by using Emanometry technique. The measured radon concentration in drinking water samples ranged between 3.10 ± 0.25 and 38.50 ± 1.54 Bq l−1 with an average value of 13.60 ± 1.12 Bq l−1. This study reveals that 44.8 % drinking water samples analyzed have radon levels in excess of the EPA recommended maximum contamination level of 11.1 Bq l−1. The total mean annual effective doses of all the samples are significantly lower than the reference level of 0.1 mSv y−1.