Page 81 - tmp

Physical - chemical properties of kaolinite and influence on the adsorption of heavy metals

Snežana Karanović
Glasinačka 11
Introduction

Effect of immobilization (%)
100
The most common source of water pollution by heavy metals is the
industry. Kaolinite is a natural, stable and cheap substance. It has a
hexagonal structure which is consisted of alternating layers of silicon 50
and aluminum. It is very affordable and swells in contact with water.

0
Method of operations 0,1 0,2 0,3 0,4 0,5
Amount of kaolinite (g)
Copper 0,3 KS Iron 0,3 KS
The experiment was consisted of three parts: Copper 0,5 KS Iron 0,5 KS
Copper 0,3 KG Iron 0,3 KG
1) Physical - chemical characterization of materials which is
Copper 0,5 KG Iron 0,5 KG
performed by XRD and SEM analysis. Chart 1 - The effect of immobilization for solutions of copper and iron in
3
3
2) Examination of the adsorption power of kaolinite – Two series of concentration of 0.3 mol/dm and 0.5 mol/dm treated with KS and KG
solutions of iron and copper were made in concentrations of 0.3 and
3
0.5 mol/dm . In 6 bottles with solutions were added various
amounts of kaolinite from Serbia (KS) and Germany (KG). After
one hour of sedimentation, samples were filtered, and sent for
analysis by AAS.

3)Mechanochemical treatment – Milled kaolinite from Serbia (MKS)
3
and a solution of lead in concentration of 3 mol/dm were used in
the third part of the experiment. In 7 bottles with solutions MKS was Chart 2 - The effect of immobilization for solution of lead in concentration of
3
3 mol/dm treated with MKS
added which is milled in varying lengths. After 24 hours of
sedimentation, the samples were filtered, and sent for analysis by
AAS. Conclusion

The effect of immobilization is higher with lower concentrations of
Research results
heavy metals and decreases with increasing of amounts of kaolinite.
Milling of kaolinite positive affects on the effect of immobilization.
Based on results, effect of immobilization was calculated. Kaolinite
This experiment demonstrated that kaolinite can be used for water
best adsorb copper, which has the smallest ions and shows better
purification and that its properties can be improved.
effect of immobilization in smaller quantities of metals (Figure 1).
The highest efficiency showed kaolinite which is milled for the
longest period of time as a result of increasing the contact surface of Literature
kaolinite and ions from the solution (Figure 2).
[1] S. S. Nenadović, (2014) Mechanochemical treatment and
structural properties of lead, Belgrade
[2] J. Karanović (2014) geopolymers and their application to the
filtration of heavy metals from water, Beograd