Sintesis dan Karakterisasi Lempung Magnetik (Mg/Al-Fe Hydrotalcite) serta Aplikasinya Sebagai Adsorben Asam Fulvat

Authors

  • Irwan Agung Saputro Universitas Islam Negeri Sunan Kalijaga
  • Karmanto Karmanto Universitas Islam Negeri Sunan Kalijaga

DOI:

https://doi.org/10.19109/alkimia.v3i2.3804

Abstract

Synthesis of magnetic clay (Mg / Al-Fe Hydrotalcite) and its application as fulvic acid
adsorbent has been carried out. Mg / Al-Fe Hydrotalcite was synthesized by reacting
FeCl2.6H2O and FeSO4.7H2O (1: 1) solutions with Mg (NO3)2.6H2O and Al (NO3)3.9H2O (2:
1) using the coprecipitation method simultaneously at pH intervals 10-13. Synthesis studies
include the study of the characteristics of solids synthesized using X-ray diffractometer and
FTIR spectrometers, Mg / Al-Fe Hydrotalcite magnetism test using an external magnetic field
and Mg / Al-Fe Hydrotalcite stability test in various medium pH. Fulvic acid was isolated
using methanol solution and characterized using FTIR spectroscopy. The study of fulvic acid
adsorption and desortion was studied by studying the fulvic acid adsorption kinetics by Mg /
Al-Fe Hydrotalcite and the effect of time on the concentrated fulvic acid concentration of Mg
/ Al-Fe Hydrotalcite.
The characterization results showed the characteristics of the peak and the functional
group Mg / Al-Fe Hydrotalcite in X-ray diffractogram and FTIR spectra. The stability of Mg /
Al-Fe Hydrotalcite tends to be stable at pH above 3. Based on FTIR spectra data, Telukpanji
fulvic acid has the main functional groups namely -COOH (aliphatic and aromatic) and
phenoh-OH groups. The results of the adsorption pattern of fuvic acid by Mg / Al-Fe
Hydrotalcite are first order reaction kinetics that reach equilibrium with a reaction rate
constant (k1) of 24 x 10-4 minutes-1. The results of post-adsorption characterization showed
that fulvic acid entered into the inter-layer of Mg / Al-Fe Hydrotalcite as evidenced by the
increase in basal spacing prices in d003 which is a characteristic of hydrotalcite. The
influence of time on the concentrated fulvic acid concentration showed that the fulvic acid
could be desorbed from Mg / Al-Fe Hydrotalcite by 82.83% or 18.52 mg / L from a total
concentration of 22.3556 mg / L.

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Published

2020-02-06

Issue

Vol. 3 No. 2 (2019): ALKIMIA

Section

Articles

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How to Cite

Sintesis dan Karakterisasi Lempung Magnetik (Mg/Al-Fe Hydrotalcite) serta Aplikasinya Sebagai Adsorben Asam Fulvat. (2020). ALKIMIA : Jurnal Ilmu Kimia Dan Terapan, 3(2), 51-60. https://doi.org/10.19109/alkimia.v3i2.3804