Statistical Modeling of Lead (Pb) Adsorption on Van Pumice

Abstract

The aim of this study is to statistical modeling of lead (Pb) adsorption on Van
Pumice. Van Pumice was used for determination of lead (Pb) adsorption level. Modeling,
depending on time, was performed to determine for lead (Pb) adsorption level at fixed pH
5.5 for various concentration and temperatures in Van pumice. All adsorption
measurements were performed with the Thermo Scientific brand ICE spectrometer model
300 Series. One-way analysis of variance was used for comparison to various temperature
and concentration levels. Tukey’s multiple comparison test was also performed to
determine different groups. Logarithmic, quadratic, cubic and logistic models as well as
linear were used to determine adsorbed lead (Pb) amount at different temperature levels
and heavy metal concentration. Differences between various time and concentration levels
were found statistically significant; however, there were no significant differences between
temperature and concentration levels. In addition, cubic model had higher R2 values for
each concentration and temperature levels. Lead (Pb) concentration and amount of ions
have been increased in the solution. As a result, although all models were significant, cubic
model showed the best performance