SINTESIS Fe3O4/SiO2 TERMODIFIKASI (N-(2-AMINOETIL)-3- AMINOPROPIL) UNTUK ADSORPSI-DESORPSI ANIONIK [AuCl4]-

Main Authors: , MIGHFAR SYUKUR, , Prof. Dr.rer.nat Nuryono, MS.
Format: Thesis NonPeerReviewed
Terbitan: [Yogyakarta] : Universitas Gadjah Mada , 2014
Subjects:
ETD
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
ctrlnum 133676
fullrecord <?xml version="1.0"?> <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 St&#xC3;&#xB6;ber&#xE2;&#xFFFD;&#xFFFD;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&#xE2;&#xFFFD;&#xFFFD;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 &#xF0;&#xFFFD;&#xFFFD;&#xBC;Au-Cu (227.473) and &#xF0;&#xFFFD;&#xFFFD;&#xBC;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&amp;sub=PenelitianDetail&amp;act=view&amp;typ=html&amp;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 Stöberâ��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 itâ��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
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
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