Selected heavy metal biosorption by compost of Myriophyllum spicatum—A chemometric approach

• Biosorption of multimetal onto the compost of Myriophyllum spicatum were examined.
• The parameters of Pb(II), Cu(II), Cd(II), Ni(II) and Zn(II) sorption were tested.
• Compost as biosorbent was characterized by SEM and TG-DTA analysis.
• Chemometric analysis was employed to optimize the experimental parameters.

In this study adsorption characteristics of lead, copper, cadmium, nickel and zinc ions onto the compost of Myriophyllum spicatum were examined. The effects of sorbent dose, duration of sorption and solution concentration on the sorption of heavy metals have been investigated. Scanning electron microscope (SEM) and thermogravimetric and differential thermal analysis (TG-DTA) were used for the characterization of this biosorbent. Low coefficients of variation have been obtained for each applied assay, which confirmed the high accuracy of measurements. Principal component analysis (PCA) was applied for differentiation of samples. Mathematical models (form of second order polynomials) were developed for prediction of adsorption. Score analysis is being useful for accessing the effect of process parameters and the tool for determination of sorption quality. On the basic of experimental results and model parameters, it can be concluded that compost has a high biosorption capacity can be utilized for the removal of selected metals from wastewater.

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