The structure of electrical double layer formed on the kaolinite surface in the mixed system of cationic polyacrylamide and lead(II) ions
 
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1
Maria Curie-Skłodowska University
2
Institute of Agrophysics, Polish Academy of Sciences
CORRESPONDING AUTHOR
Gracja Fijałkowska   

Maria Curie-Skłodowska University
 
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ABSTRACT
The bioavailability of toxic heavy metals for organisms depends mainly on the soil physicochemical properties, i.e. type and granulometric composition, pH value, redox potential, individual fractions content and microorganisms presence. The addition of artificial fertilizers rich in humic substances or polyacrylamide soil flocculants may also affect the content of easily absorbed heavy metal forms. Due to their chelating properties, the added substances can bind metal ions in the form of complexes characterized by low mobility in soil environment. As a consequence, the immobilization process takes place, which is a desirable phenomenon for organism health. The aim of the study was to determine the structure of electrical double layer formed on the kaolinite surface in the mixed system of cationic polyacrylamide and lead(II) cations. The influences of cationic PAM presence on the Pb(II) ions sorption on the kaolinite surface as well as heavy metal ion addition on the polymer adsorbed amount on the same clay mineral were studied. The adsorption and electrokinetic properties of studied kaolinite/CT PAM/Pb(II) systems were determined based on the spectrophotometric study, zeta potential measurements as well as potentiometric titration.
eISSN:2084-4735
ISSN:1643-1049