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Piriyakumar J.E.L.,Tranquebar Bishop Manickam Lutheran College | Vasuky M.,Seethalakshmi Achi College for Women
Neural, Parallel and Scientific Computations | Year: 2010

In this paper we introduce the notion of levelwise convergence of sequence of fuzzy random variables. We derive equivalent conditions for left quasi uniform convergence of fuzzy random variables. Conditions are obtained for eventually equi-right continuity for the sequence of fuzzy random variables. A necessary and sufficient condition is obtained under which for a sequence of fuzzy random variables (Xn) satisfying lim n → ∞ X n,αL = Vα and lim n → ∞ Xn,αU= Wα where Vα and W α are the pair of random variables for α ε [0,1] that determines a fuzzy random variable. © Dynamic Publishers, Inc. Source


Samu Solomon J.,Tranquebar Bishop Manickam Lutheran College | Martin Devaprasath P.,Tranquebar Bishop Manickam Lutheran College | Chandramohan M.,AVVM Sri Pushpam College
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2012

The studies on adsorption of Cu (II) were conducted by varying various parameters such as contact time, pH, and amount of adsorbent, concentration of adsorbate, mesh size and temperature. The kinetics of adsorption of Cu (II)) ion followed pseudo second order. Langmuir adsorption, Freundlich, Temkin, DKR, Harkin-jura, Redlich-peterson and Halsey isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. The adsorption capacity was found to be pH dependant. Cynodon dactylon was found to be very effective and reached equilibrium in 3 h (adsorbate concentration 150 mg l-1). The rate constant has been calculated at 303, 313, 323 and 333K and the activation energy (Ea) was calculated using the Arrhenius equation. Thermodynamic parameters such as standard Gibbs energy (ΔG°) and heat of adsorption (ΔH°) were calculated. The ΔG° and ΔH° values for Cu(II) adsorption on the Cynodon dactylon showed the process to be endothermic in nature. The percentage of adsorption increased with decrease in pH and showed maximum removal of Cu(II)in the pH range 5 for an initial concentration of 10 mg l-1. Source


Samu Solomon J.,Tranquebar Bishop Manickam Lutheran College | Martin Devaprasath P.,Tranquebar Bishop Manickam Lutheran College | Chandramohan M.,AVVM Sri Pushpam College
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2012

The studies on adsorption of Pb (II) were conducted by varying various parameters such as contact time, pH, and amount of adsorbent, concentration of adsorbate, mesh size and temperature. The kinetics of adsorption of Pb (II) ion followed pseudo second order. Langmuir adsorption, Freundlich, Temkin, DKR, Harkin-jura, Redlich-peterson and Halsey isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. The adsorption capacity was found to be pH dependant. Cynodon dactylon was found to be very effective and reached equilibrium in 3 h (adsorbate concentration 150 mg l.1). The rate constant has been calculated at 303, 313, 323 and 333K and the activation energy (Ea) was calculated using the Arrhenius equation. Thermodynamic parameters such as standard Gibbs energy (ΔG.) and heat of adsorption (ΔH.) were calculated. The ΔG. and ΔH. values for Pb (II) adsorption on the Cynodon dactylon showed the process to be endothermic in nature. The percentage of adsorption increased with decrease in pH and showed maximum removal of Pb (II) in the pH range 5 for an initial concentration of 10 mg l.1. Source

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