16 research outputs found
An Explicit Analytic Solution to the Thomas-Fermi Equation by the Improved Differential Transform Method
In this paper, a newly proposed analytical scheme by the authors namely the improved differential transform method is employed to provide an explicit series solution to the Thomas-Fermi equation. The solution procedure is very straightforward, requiring merely elementary operations together with differentiation, and ends up in a recursive formula involving the Adomian polynomials to afford the unknown coefficients. Unlike many other methods, our approach is free of integration and hence can be of computational interest. In addition, a very good agreement between the proposed solution and the results from several well-known works in the literature is demonstrated
Batch removal of Pb (ΙΙ) ions from aqueous medium using gamma-Al 2
The aim of the present work is to study the efficiency of a biocompatible polymer-based adsorbent for the removal
of Pb (II) ions whose devastating effects on people’s health is a matter of great concern from aqueous solution.
In this study, ethyl cellulose and gamma-Al2 O3 nanoparticles/ethyl cellulose electrospun adsorbents were prepared
for the batch removal of Pb (II) ions from aqueous solution. Both samples were characterized using contact
angle analysis, N2 adsorption/desorption technique, FT-IR and SEM. The Freundlich model (R-square = 0.935
and RMSD (%) = 6.659) and the Dubinin-Radushkevich model (R-square = 0.944 and RMSD (%) = 6.145)
were found to be more reliable in predicting the experimental data from the adsorption of Pb (II) ions onto the
electrospun gamma-Al2 O3 nanoparticles/ethyl cellulose than the Langmuir model (R-square = 0.685 and RMSD
(%) = 14.61) and also the Temkin model (R-square = 0.695 and RMSD (%) = 14.38)