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ADELIA PERMATA SARI

NIM

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Abstrak (Bhs. Indonesia)

Telah dilakukan penelitian mengenai adsorpsi zat warna congo red
 menggunakan hidrotalsit Ni/Al-Benzoat. Tujuan penelitian ini yaitu untuk 
 mengetahui kemampuan hidrotalsit Ni/Al-Benzoat sebagai adsorben dalam 
mengadsorpsi zat warna congo red. Hidrotalsit Ni/Al-Benzoat disintesis 
 menggunakan metode kopresipitasi dengan perbandingan mol Ni2+:Al3+ yaitu 3:1. 
Hidrotalsit Ni/Al-Benzoat hasil sintesis dikarakterisasi menggunakan instrumen 
FTIR dan XRD. Kajian adsorpsi hidrotalsit Ni/Al-Benzoat terhadap congo red
 dilakukan dengan beberapa parameter, yaitu pH, waktu kontak, massa adsorben, dan konsentrasi adsorbat. Hasil analisis XRD menunjukkan hidrotalsit Ni/Al-NO3
 teridentifikasi pada sudut 11,15°. Hidrotalsit Ni/Al-NO3 terinterkalasi dengan anion 
benzoat membentuk hidrotalsit Ni/Al-Benzoat terlihat dari pergeseran sudut ke 
5,91°
. Hasil analisis FTIR hidrotalsit Ni/Al-Benzoat muncul pita serapan pada 
panjang gelombang 1597 cm-1
yang menunjukkan serapan C=C dari cincin
 aromatik ion benzoat. Hasil studi adsorpsi diperoleh kondisi optimum adsorpsi zat 
warna congo red oleh hidrotalsit Ni/Al-Benzoat pada pH 6, waktu kontak 60 menit,
 massa adsorben 0,05 gram dan konsentrasi adsorbat 80 ppm. Kinetika adsorpsi
 congo red menggunakan hidrotalsit Ni/Al-Benzoat mengikuti kinetika adsorpsi 
pseudo orde dua dan model isoterm adsorpsi mengikuti isoterm Freundlich.

Abtrak (Bhs. Inggris)

Research has been carried out on the adsorption of congo red dye using 
Ni/Al-Benzoate LDH. The purpose of this study was to determine the ability of 
Ni/Al-Benzoate LDH as an adsorbent in adsorption of congo red dye. Ni/Al-
Benzoate LDH was synthesized using the coprecipitation method with a mole ratio 
of Ni2+:Al3+ is 3:1. The synthesized Ni/Al-Benzoate LDH was characterized using 
FTIR and XRD instruments. Adsorption study of Ni/Al-Benzoate LDH on congo red 
was carried out with several parameters, among them are pH, contact time, 
adsorbent mass, and adsorbate concentration. The results of the XRD analysis 
showed that Ni/Al-NO3 LDH was identified at an angle of 11.15°. Ni/Al-NO3 LDH 
intercalates with benzoate anion to form Ni/Al-Benzoate LDH as seen from the 
angle shift to 5.91°. The results of the FTIR analysis of Ni/Al-Benzoate LDH show 
an absorption band at a wavelength 1597 cm-1 which indicates C=C absorption 
from the aromatic ring of the benzoate ion. The results of the adsorption study 
obtained optimum conditions for the adsorption of congo red dye by Ni/Al-Benzoate 
LDH at pH 6, contact time of 60 minutes, adsorbent mass of 0.05 gram and 
adsorbate concentration of 80 ppm. The adsorption kinetics of congo red using 
Ni/Al-Benzoate LDH follow the second order pseudo adsorption kinetics and the 
adsorption isotherm model follows the Freundlich isotherm.

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