The Design Of The Experiments Of Arsenic
Removal From Aqueous Solutions Onto
Fe-XAD8-DEHPA
Author(s)
A. Negrea, P. Negrea, M. Ciopec, I. Grozav, L. Lupa
& C. M. Davidescu
Abstract
One of the main aims for a process is to find the optimum values of the
parameters which assure the desired values of the process responses. This
activity must be made in the minimum of the time and with the minimum use of
consumable resources. The design of the experiments (DoE) assisted by the
computer assures that this happens. In this paper, DoE was used to study the
adsorption performance of Fe-XAD8-DEHPA in the removal process of As(V)
ions from aqueous solutions. It was observed that the Adsorption Capacity and
the Efficiency in the removal process of As(V) from the aqueous solution was
significantly influenced by concentration and pH. The mathematical model of the
process is very good. It includes the experimental data of over 99% in the case of
adsorption capacity and over 97% in the case of efficiency. From the contour
plots of adsorption capacity and efficiency can be seen that the chemical process
is nonlinear. The DOE helped us to find the optimum values of the control
factors (pH, contact time and arsenic initial concentrations from solutions) in
order to obtain maximum values of Adsorption Capacity and Efficiency.
Keywords: arsenic adsorption, Fe-XAD8-DEHPA, design of experiments.
Keywords
arsenic adsorption, Fe-XAD8-DEHPA, design of experiments
Related Book
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