SINTESIS Fe3O4/SiO2 TERMODIFIKASI (N-(2-AMINOETIL)-3- AMINOPROPIL) UNTUK ADSORPSI-DESORPSI ANIONIK [AuCl4]-
Main Authors: | , MIGHFAR SYUKUR, , Prof. Dr.rer.nat Nuryono, MS. |
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Format: | Thesis NonPeerReviewed |
Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2014
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Subjects: | |
Online Access: |
https://repository.ugm.ac.id/133676/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74440 |
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133676 |
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fullrecord |
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<dc schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><relation>https://repository.ugm.ac.id/133676/</relation><title>SINTESIS Fe3O4/SiO2 TERMODIFIKASI (N-(2-AMINOETIL)-3- AMINOPROPIL) UNTUK ADSORPSI-DESORPSI
ANIONIK [AuCl4]-</title><creator>, MIGHFAR SYUKUR</creator><creator>, Prof. Dr.rer.nat Nuryono, MS.</creator><subject>ETD</subject><description>The synthesis of Fe3O4/SiO2 modified with N-(2-aminoethyl)-3-
aminopropyl group (Fe3O4/SiO2/ED) and investigation Au(III) recovery in the
multimetal system Au(III)/Cu(II)/Cr(VI) have been conducted. Fe3O4/SiO2/ED
was synthesized via Stöber�s modifications method with methanol as dispersant of
magnetite. Precursor sodium silicate and N-(2-aminoethyl)-3-aminopropyl
trimethoxy silane (EDS) was added as aminosilica shell shaper. The synthesized
samples were characterized by X-ray diffraction (XRD), Fourier transform
infrared (FT-IR) spectrophotometer and transmission electron microscopy (TEM).
Experimental parameter affecting Au(III) adsorption onto Fe3O4/SiO2/ED such as
pH, contact time, initial concentration were studied. Study of kinetic data was
analyzed using first-order, second-order, pseudo-first-order and pseudo-second
order. Furthermore, the Langmuir and Freundlich isotherm models were used to
determine it�s capacity and adsorption energy. Desorption by thiourea-HCl 2%
and the reusability of adsorbents were done by adsorption-desorption cycle.
The characterization with XRD, FT-IR and TEM proved that SiO2 and N-
(2-aminoethyl)-3-aminopropyl group was successfully covered the magnetite
particle to form Fe3O4/SiO2/ED adsorbent. Study of kinetic data showed that the
adsorption of Au(III) on Fe3O4/SiO2/EDS fits to pseudo-second order model with
rate constant of adsorption is 0.710 g mmol L-1min-1. The best interpretation for
the experimental data was given by Langmuir isotherm model. The maximum
adsorption capacity for Au(III) is 142.85 mg/g and the energy of adsorption is
25,052 kJ/mol. Gold loaded on the adsorbent could be easily desorbed by 0,2
mol/L HCl containing 2% of thiourea with 99,82% efficiency. The reusability
Fe3O4/SiO2/ED shows the high stability of the adsorbent within 5 times
adsorption-desorption cycle with more than 90% efficiency. Adsorbent also shows
selectivity in adsorbing Au(III) in the multimetal system Au(III)/Cu(II)/Cr(VI)
with the coefficient selectivity �Au-Cu (227.473) and �Au-Cr (12.261).</description><publisher>[Yogyakarta] : Universitas Gadjah Mada</publisher><date>2014</date><type>Thesis:Thesis</type><type>PeerReview:NonPeerReviewed</type><identifier> , MIGHFAR SYUKUR and , Prof. Dr.rer.nat Nuryono, MS. (2014) SINTESIS Fe3O4/SiO2 TERMODIFIKASI (N-(2-AMINOETIL)-3- AMINOPROPIL) UNTUK ADSORPSI-DESORPSI ANIONIK [AuCl4]-. UNSPECIFIED thesis, UNSPECIFIED. </identifier><relation>http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74440</relation><recordID>133676</recordID></dc>
|
format |
Thesis:Thesis Thesis PeerReview:NonPeerReviewed PeerReview |
author |
, MIGHFAR SYUKUR , Prof. Dr.rer.nat Nuryono, MS. |
title |
SINTESIS Fe3O4/SiO2 TERMODIFIKASI (N-(2-AMINOETIL)-3- AMINOPROPIL) UNTUK ADSORPSI-DESORPSI
ANIONIK [AuCl4]- |
publisher |
[Yogyakarta] : Universitas Gadjah Mada |
publishDate |
2014 |
topic |
ETD |
url |
https://repository.ugm.ac.id/133676/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74440 |
contents |
The synthesis of Fe3O4/SiO2 modified with N-(2-aminoethyl)-3-
aminopropyl group (Fe3O4/SiO2/ED) and investigation Au(III) recovery in the
multimetal system Au(III)/Cu(II)/Cr(VI) have been conducted. Fe3O4/SiO2/ED
was synthesized via Stöber�s modifications method with methanol as dispersant of
magnetite. Precursor sodium silicate and N-(2-aminoethyl)-3-aminopropyl
trimethoxy silane (EDS) was added as aminosilica shell shaper. The synthesized
samples were characterized by X-ray diffraction (XRD), Fourier transform
infrared (FT-IR) spectrophotometer and transmission electron microscopy (TEM).
Experimental parameter affecting Au(III) adsorption onto Fe3O4/SiO2/ED such as
pH, contact time, initial concentration were studied. Study of kinetic data was
analyzed using first-order, second-order, pseudo-first-order and pseudo-second
order. Furthermore, the Langmuir and Freundlich isotherm models were used to
determine it�s capacity and adsorption energy. Desorption by thiourea-HCl 2%
and the reusability of adsorbents were done by adsorption-desorption cycle.
The characterization with XRD, FT-IR and TEM proved that SiO2 and N-
(2-aminoethyl)-3-aminopropyl group was successfully covered the magnetite
particle to form Fe3O4/SiO2/ED adsorbent. Study of kinetic data showed that the
adsorption of Au(III) on Fe3O4/SiO2/EDS fits to pseudo-second order model with
rate constant of adsorption is 0.710 g mmol L-1min-1. The best interpretation for
the experimental data was given by Langmuir isotherm model. The maximum
adsorption capacity for Au(III) is 142.85 mg/g and the energy of adsorption is
25,052 kJ/mol. Gold loaded on the adsorbent could be easily desorbed by 0,2
mol/L HCl containing 2% of thiourea with 99,82% efficiency. The reusability
Fe3O4/SiO2/ED shows the high stability of the adsorbent within 5 times
adsorption-desorption cycle with more than 90% efficiency. Adsorbent also shows
selectivity in adsorbing Au(III) in the multimetal system Au(III)/Cu(II)/Cr(VI)
with the coefficient selectivity ð��1⁄4Au-Cu (227.473) and ð��1⁄4Au-Cr (12.261). |
id |
IOS2744.133676 |
institution |
Universitas Gadjah Mada |
institution_id |
19 |
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library:university library |
library |
Perpustakaan Pusat Universitas Gadjah Mada |
library_id |
488 |
collection |
UGM Repository |
repository_id |
2744 |
subject_area |
Karya Umum |
city |
SLEMAN |
province |
DAERAH ISTIMEWA YOGYAKARTA |
repoId |
IOS2744 |
first_indexed |
2016-09-14T18:34:50Z |
last_indexed |
2016-09-22T21:48:58Z |
recordtype |
dc |
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1765816672740966400 |
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17.538404 |