L-Arginine-Modified Silica for Adsorption of Gold(III)

Hastuti, Sri; Nuryono, Nuryono; Kuncaka, Agus

doi:10.22146/ijc.21203

Cited by 18 publications

(13 citation statements)

References 27 publications

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“…Silika memiliki beberapa sifat unik yang tidak dimiliki oleh senyawa anorganik lainnya seperti, sifat adsorpsi dan pertukaran ion yang baik, kestabilan mekanik dan termal tinggi, mudah dimodifikasi dengan senyawa kimia tertentu untuk meningkatkan kinerjanya (Sriyanti et al, 2005). Silika mampu digunakan sebagai adsorben karena memiliki gugus silanol (Si-OH) dan gugus siloksan (Si-O-Si) serta memiliki pori-pori yang luas dan luas permukaan yang khas (Buhani et al, 2009, Hastuti et al, 2015.…”

Section: Pendahuluanunclassified

Sintesis dan Karakterisasi Silika Abu Ampas Tebu Termodifikasi Arginin sebagai Adsorben Ion Logam Cu(II)

2018

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Telah dilakukan penelitian tentang sintesis dan karakterisasi silika dari abu ampas tebu termodifikasi arginin dengan senyawa penggandeng glisidoksipropiltrimetoksisilan (GPTMS) sebagai adsorben ion logam Cu(II). Penelitian ini bertujuan untuk mengetahui karakterisasi silika abu ampas tebu termodifikasi arginin dengan senyawa penggandeng GPTMS sebagai adsorben ion logam Cu(II). Sintesis silika termodifikasi arginin dengan senyawa penggandeng GPTMS dilakukan dengan metode sol-gel. Adsorben tersebut dikarakterisasi dengan XRD, FTIR dan SAA. Uji kemampuan adsorpsi dilakukan menggunakan metode batch dengan larutan ion logam Cu(II), variasi pH, waktu kontak dan konsentrasi. Hasil penelitian menunjukkan perubahan difraktogram XRD pada silika termodifikasi dan silika abu ampas tebu (silika AAT). Difraktogram menunjukkan puncak melebar pada 2θ sebesar 10-15° dan 20-25°. Analisis FTIR menunjukkan Serapan baru –CH, ̶ NH tekuk, ̶ CN berturut-turut pada daerah 2947, 1570, dan 1356 cm-1. Analisis SAA menunjukkan peningkatan luas permukaan pada silika termodifikasi arginin daripada silika dari 64,31 m2/g menjadi 382,67 m2/g. Kondisi terbaik adsorpsi ion logam Cu(II) dengan adsorben silika termodifikasi arginin terjadi pada pH 6 dengan waktu kontak 45 menit. Silika termodifikasi arginin mengalami peningkatan kapasitas adsorpsi dibandingkan silika dengan kapasitas adsorpsi yaitu dari 0,12 mg/g menjadi 0,52 mg/g. Isoterm adsorpsi ion logam Cu(II) lebih dominan mengikuti isoterm Langmuir dengan r = 0,997.Synthesis and Characterization of Arginine-Modified Silica from Baggase Ash as Cu(II) Ions Adsorbent. The synthesis and characterization of arginine modified silica from bagasse ash with crosslinker glycydoxypropyltrimethoxyxylane (GPTMS) as an adsorbent for Cu (II) ions has been studied. This research aimed to determine the characterization of arginine modified silica with crosslinker GPTMS as an adsorbent for Cu(II) ions. Synthesis arginine modified silica with crosslinker GPTMS was conducted using sol-gel method. The adsorbent was characterized by XRD, FTIR and SAA. Adsorption ability test conducted using the batch method with a solution of Cu(II) ions, variation of pH, contact time and concentration. The results showed the change in the XRD diffractogram of arginine modified silica from bagasse (silica ATT). XRD diffractogram releaved broad peaks at 2θ 10-15° and 20-25°. FTIR analysis showed a new absorption -CH, -NH bending, -C-N on area of 2947, 1570, and 1356 cm-1, respectively SAA analysis showed that the arginine-modified silica with crosslinker GPTMS has higher surface area than silica from 64.31 m2/g to 382.67 m2/g. The best conditions for copper adsorption with adsorbent arginine modified silica occured at pH 6 with a contact time of 45 minutes. Arginine modified silica has higher adsorption capacity than silica with a adsorption capacity from 0.12 mg/g to 0.52 mg/g. Adsorption of Cu (II) metal ions more dominantly follows Langmuir isotherms with r = 0.997.

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Section: Pendahuluanunclassified

Sintesis dan Karakterisasi Silika Abu Ampas Tebu Termodifikasi Arginin sebagai Adsorben Ion Logam Cu(II)

2018

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“…Then the magnetite suspension was added with 6 mL sodium silicate solution (1:1) and sonicated for 15 min and followed by mechanical stirring for 30 min. After that, the mixture was added with 1 mL GPTMS and stirred for 30 min, and finally 1 mL of 1 M arginine was added and stirred mechanically for 1 h. The mixture was added with 2 M HCl drop wise up to pH 7 (Adapted from Hastuti et al [20]). The gel formed was aged and kept overnight at a room temperature, washed with distilled water and ethanol 3 times, and dried in an oven at 65°C to constant weight.…”

Section: Instrumentationmentioning

confidence: 99%

“…2d is observed absorption at 3474, 1092, 800, 469 cm (Fig. 2f) shows specific bands of silica at 3402, 1090, 795, and 451 cm -1 , assigned to -OH (Si-OH silanol) groups stretching vibration, asymmetric and symmetric stretching and bending vibration of siloxane Si-O(Si-O-Si), respectively [20,26].…”

Section: Functional Groups Of Fe 3 O 4 /Sio 2 -Gptms-argmentioning

confidence: 99%

Coating of L-Arginine Modified Silica on Magnetite through Two Different Sol-Gel Routes

2017

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“…The amino groups can act as an electron-pair donor to the metal ions. As a result, the amine group is able to adsorb metal ions [10][11][12]. The results showed that the adsorption capacity of Cu(II), Ni(II), Pb(II), Cd(II), and Zn(II) increases with increasing nitrogen atom number in the adsorbent [5].…”

Section: ■ Introductionmentioning

confidence: 99%

Coating of 2-Aminobenzimidiazole and 1-(o-Tolyl)biguanide Functionalized Silicas on Iron Sand Magnetic Material for Sorption of [AuCl4]–

et al. 2019

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Two novel materials of 2-aminobenzimidiazole (AB) and 1-(o-tolyl)biguanide (TB) modified silicas coated on the iron sand magnetic material (MM@SiO2/AB and MM@SiO2/TB) have been synthesized and were used to adsorb Au(III) from Au/Cu/Ni solution. Silica layering MM was modified with polyamino compounds via a sol-gel process using a sodium silicate solution, 3-chloropropyltrimethoxysilane (CPTS) and modifier compounds. Adsorption of Au(III) on MM@SiO2/AB and MM@SiO2/TB was investigated in a batch system by varying pH, initial concentration, contact time and the presence of other metal ions (Cu(II) and Ni(II)). The results showed that MM@SiO2/AB and MM@SiO2/TB were successfully synthesized through the sol-gel process using cross-linking agent CPTS. Adsorption of Au(III) on MM@SiO2/AB and MM@SiO2/TB decreased with the increase of pH and followed the Langmuir isotherm models with adsorption capacity of 17.15 and 9.44 mg/g, respectively. The adsorption kinetics fit to pseudo-second-order model with the rate constants of 1.16 × 10-2 and 1.46 × 10-2 g mg-1 min-1, respectively. MM@SiO2/AB and MM@SiO2/TB gave a high selectivity towards Au(III) in a mixture of Cu(II) and Ni(II). The desorption using thiourea 1 M solution in 1 M HCl of metal ions showed that percentage of Au(III) desorbed was higher than that of Cu(II) and Ni(II).

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L-Arginine-Modified Silica for Adsorption of Gold(III)

Cited by 18 publications

References 27 publications

Sintesis dan Karakterisasi Silika Abu Ampas Tebu Termodifikasi Arginin sebagai Adsorben Ion Logam Cu(II)

Sintesis dan Karakterisasi Silika Abu Ampas Tebu Termodifikasi Arginin sebagai Adsorben Ion Logam Cu(II)

Coating of L-Arginine Modified Silica on Magnetite through Two Different Sol-Gel Routes

Coating of 2-Aminobenzimidiazole and 1-(o-Tolyl)biguanide Functionalized Silicas on Iron Sand Magnetic Material for Sorption of [AuCl<sub>4</sub>]<sup>–</sup>

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