Adsorption Kinetics Study of Cr (III) Metals Using Activated Natural Zeolite

Abstract

Several methods have been developed to reduce and minimize the presence of copper heavy
metals that pollute waters, such as by adsorption method, is one of the natural  zeolite
material is widely used as an adsorbent. Natural zeolites have potential as adsorption heavy
metals in waste water treatment due to adsorption capacity and high selectivity, long-lived,
and the numbers are abundant in Indonesia. Research studies of metal adsorption kinetics of
Cr  (III) with activated natural zeolite aims to determine a suitable kinetic model for metal
adsorption kinetics of Cr  (III) with activated zeolite  adsorption evaluate the metal Cr  (III)
and the effect of temperature on the adsorption rate constant. This study begins with the
activation of natural zeolite in physics and chemistry and to be continued to Cr  (III) metal
adsorption by activated natural zeolite with a variety of contact time and temperature.
Results spectrophotometer adsorption measured using atomic absorption (AAS). From the
research that has been done shows that a suitable model for the kinetics of adsorption of
metal Cr  (III) with zeolite activated following the model of first  order with a value of k=
0,011  min-1
for a temperature variation of 300
C, 400
C, 500
C. From the results obtained
conclude that the higher the temperature will be faster the rate of adsorption and the amount
of activation energy values obtained in the amount of 296,73 J/mole, which means that  the
adsorption process takes place in physics.


Keyword: adsorption kinetics, Cr (III) metal, natural zeolites, adsorption
.