OPTIMASI WAKTU KONTAK DAN KONSENTRASI ADSORBAT PADA PENJERAPAN TIMBAL(II) OLEH LEMPUNG ALAM MAREDAN
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Date
2023-12
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Elfitra
Abstract
The application of Maredan natural clay as an adsorbent has several advantages,
such as lower cost, abundant availability and good adsorption efficiency. In this
research, Maredan natural clay was used to adsorb lead in water. The purpose of
this research was determine the optimum contact time and optimum
concentration of adsorbate, the adsorption isotherm and adsorption kinetics model
of the adsorbent in lead adsorption process using Maredan natural clay. The
adsorption used batch method with contact time variations of 10, 20, 30, 40 and
50 minutes and variations in adsorbate concentration of 40, 60, 80 and 100 ppm.
The concentration of adsorbate adsorbed was determined using AAS.
Characterization of the adsorbent before and after adsorption process was carried
out using a FTIR instrument to determine the bond vibrations and functional
groups of Maredan natural clay. The optimum contact time and adsorbate
concentration of this research was obtained at 20 minutes and adsorbate
concentration of 40 ppm, with adsorption efficiency of 77,02%. The adsorption
isotherm for lead adsorption using Maredan natural clay was found to follow the
Langmuir isotherm with R2 coefficient of 0,9314. The kinetic model of this
research followed a second pseudo order kinetic model with and R2 coefficient of
0,9992.
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Keywords
adsorption, lead, clay
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