Advanced Mathematical Methods for Scientists and Engineers

The sorption of three divalent metal ions — copper, nickel and lead — from aqueous solution onto peat in single component systems has been studied and the equilibrium isotherms determined. The experimental data have been analysed using the Langmuir, Freundlich, Redlich-Peterson, Toth, Temkin, Dubinin-Radushkevich and Sips isotherm models. In order to determine the best fit isotherm for each system, six error analysis methods were used to evaluate the data: the coefficient of determination, the sum of the errors squared, a hybrid error function, Marquardt's percent standard deviation, the average relative error and the sum of absolute errors. The error values demonstrated that the Sips equation provided the best model for the three sets of experimental data overall.

http://dns2.asia.edu.tw/~ysho/YSHO-English/Publications/PDF/Wat%20Air%20Soi%20Pol141,%201.pdf

Equilibrium isotherm studies for the sorption of divalent metal ions onto peat: copper, nickel and lead single component systems

Chitin is the world's second most abundant naturally occurring polysaccharide. Much of this is disposed of as waste from seafood crustacean, mainly in shrimps, prawns, crabs, and lobsters, where it occurs as a significant component in the shells/exoskeletons of crustacea. Due to its widespread abundance, its chemical and physical versatility, and the problems of its disposal as a waste material, a wide range of value-added applications of chitin and chitosan is being initiated, investigated, and developed. The widely ranging value-added applications of chitin and chitosan are presented in this review. Chitin and its derivative, chitosan, both highly stable and difficult to degrade materials, can be obtained as 10–20% w/w from the waste seafood shells by suitable chemical processing. One of the significant developments in the new range of applications is the study of the ability of chitosan, as a potentially major environmental treatment material, to remove metal ions from wastewaters. Chitosan is the deac...

Application of Chitosan for the Removal of Metals From Wastewaters by Adsorption—Mechanisms and Models Review

Adsorption isotherm models for dye removal by cationized starch-based material in a single component system: Error analysis

Mass transfer in the membrane concentration polarization layer under turbulent cross flow

From the Publisher:
Presenting a clear, concise exposition of practical computational methods in chemical engineering, this book provides a bridge between introductory applications and more advanced levels of mathematics. Authors Owen Hanna and Orville Sandall include broad use of convergence acceleration techniques such as Pade approximation for series; Shanks transformation for series; linear and nonlinear systems of algebraic equations; systematic use of global Richardson extrapolation for integrals and ODE systems to monitor the overall error; and discussion of methods for the solution of stiff ODE. In addition, some 25 user-friendly microcomputer programs which are demonstrated and used for many of the problems are available in IBM format on the accompanying diskette in FORTRAN 77 and True BASIC.

Computational methods in chemical engineering

Le probleme du titre est decrit par un modele mathematique base sur une procedure d'approximation asymptotique pour des nombres de Schmidt eleves. Cette equation ne devie que de 1,7% par rapport a la solution numerique des equations differentielles qui decrivent le procede

Owen T. Hanna

Papers

Computational methods in chemical engineering

Mass transfer accompanied by first-order chemical reaction for turbulent duct flow

A new very simple explicit method for the integration of mildly stiff ordinary differential equations

New explicit and implicit «improved Euler» methods for the integration of ordinary differential equations

Heat and mass transfer in turbulent flow under conditions of drag reduction