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THE EFFECT OF NaOH CONCENTRATION AND TEMPERATURE ON ZEOLITE SYNTHETIS FROM FLY ASH BY HIDROTHERMAL ALKALI Jumaeri, Jumaeri; Sutarno, Sutarno; Kunarti, Eko Sri; Santosa, Sri Juari
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
Publisher : Jurnal Zeolit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (803.518 KB)

Zeolite synthesis from coal fly ash PLTU Tanjung Jati Japara was conducted by hydrothermal alkali. Preparation was done on fly-ash that has been refluxed with 1M of HCl and without refluxed. NaOH with certain concentration (2, 3, and 4M) was mixed with coal fly-ash by ratio 10 ml each 1 gram of fly ash into Teflon tube 100 ml at autoclave stainless-steel. Then, autoclave was heated on the oven at temperature of 120-1600C. Synthetic zeolite ouput was qualitative tested by using infrared spectroscopy, X-Ray diffraction, and SEM. The result showed that NaOH concentration, temperature, and hydrothermal alkali period of coal fly ash was affecting characterization of zeolite ouput. The temperature which use for optimally hydrothermal processes exist on range 140 â160oC. The increase of temperature causes improving crystallization of zeolite products. Hydrothermal synthetic product from fly ash is alumina-silica compound which are a mixture of some crystals such as P zeolite, Y zeolite, sodalite, mullite, and quartz.

KAJIAN ADSORPSI Ag(S2O3)23- DALAM LIMBAH FOTOGRAFI PADA ADSORBEN KITIN DAN ASAM HUMAT TERIMOBILISASI PADA KITIN Khoerunnisa, Fitri; Santosa, Sri Juari; Kunarti, Eko Sri
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 9, No 2 (2007): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v9i2.327

This work was started with isolation of humic acid from peat soil and chitin from crab shell, immobilization of humic acid on chitin, and characterization of adsorbents of C and HAC. Optimum condition was studied by interacting the adsorbents with Ag(S2O3)23- in a synthetic solution on variousÂ of pH from 2 to 10. Adsorption rate was studied by interacting the adsorbent with Ag(S2O3)23- in the synthetic solution on various time from 2 to 120 minutes. The determination of the energy and the capacity of adsorption were studied by interacting the adsorbent with Ag(S2O3)23- on various initial concentration from 2 to 75 ppm. Moreover, the mechanism of adsorption was studied by applying a sequential desorption using H2O, Na2EDTA 0.1 M, KSCN 0.5 M, and KOH 1 M. The adsorption of Ag(S2O3)23- in photography wastewater on C and on HAC were studied at the same condition as obtained for the synthetic solution. The result showed that pH 2 was the optimum adsorption condition for Ag(S2O3)23- in the synthetic solution on both C and HAC adsorbents. Ag(S2O3)23- in the synthetic solution was chemically adsorbed on C and on HAC, involving energy adsorption of 22.74â23.30 kJ/mole, respectively. Adsorption of Ag(S2O3)23- on C was faster than that on HAC with the rate constants for adsorbent C and HAC were 73 x 10-4 and 46 x 10-4 minute-1, respectively. Adsorption capacity of Ag(S2O3)23- on C and on HAC were 2.107 x 10-4 and 1.818 x 10-4 mole/g, respectively. The amount of Ag(S2O3)23- in photography wastewater that was adsorbed on C and on HAC were 13.52 and 12.47 mg/L, respectively. The hydrogen bonding and ion exchange were the dominant mechanism of adsorption.Key words: Ag(S2O3)23-, adsorption, chitin, immobilization, humic acid.

PENERAPAN FREUNDLICH MODEL PADA ADSORPSI-REDUKTIF ISOTHERM AUCL4Â¯ DENGAN ASAM HUMAT Ismillayli, Nurul; Santosa, Sri Juari; Siswanta, Dwi
Jurnal PIJAR Vol 10, No 2 (2015)
Publisher : Jurnal PIJAR

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Abstrak: Telah dilakukan adsorpsi reduktif isotherm AuCl4Â¯ dengan menggunakan asam humat hasil isolasi tanah gambut Rawa Pening, Ambarawa. Isolasi dilakukan melalui perendaman alam 0,1 M NaOH dan dilanjutkan dengan pemurnian menggunakan 0,1 M HCl/0,3 M HF. Asam humat hasil isolasi dikarakterisasi menggunakan spektroskopi inframerah, ditentukan kadar abunya dan diaplikasikan untuk adsorpsi reduksi isotherm larutan AuCl4Â¯. Hasil karakterisasi menunjukkan bahwa asam humat hasil isolasi memiliki gugus âCOOH, -OH fenolik, hidrokarbon alifatik dan aromatis dengan kadar abu sebesar 1,13%. Data adsorpsi AuCl4Â¯ Â dengan menggunakan asam humat lebih menunjukkan kecocokan dengan persamaan Freundlich di banding Langmuir, dengan harga R=0,92, n=1,7184 dan log KF= 4,1707. Reduksi Au(III) menjadi Au(0) oleh asam humat dikonfirmasi dengan munculnya puncak tajam baru dengan nilai 2Î¸ =38, 44, 64 dan 77Â° yang merupakan puncak karakteristik dari partikel emas.Â Kata kunci: adsorpsi reduktif isotherm, AuCl4Â¯, asam humat, Freundlich.Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Abstract: Isotherm adsorption reductive of AuCl4Â¯ by using isolated humic acid of Rawa Pening peat soil, Ambarawa had been conducted. Isolation was done by soaking peat soil in 0.1 M NaOH and following by purification in 0.1M HCl/0.3 HF. The isolated humic acid was characterized using infrared spectroscopy, determined its ash contain and aplicated for isotherm adsorption reductive of AuCl4Â¯. FTIR spectra indicated that isolated humic acid consist of COOH group, phenolic âOH, aliphatic hydrocarbon and aromatic ring, its ash content was 1.13%. Asorption data of AuCl4Â¯Â showed more suitable for Freundlich model than Langmuir model, with R=0,92, n=1,7184 and log KF= 4,1707. Reduction of Au(III) to Au(0) was confirmed by appearance of sharp peak at 2Î¸ = 38, 44, 64 dan 77Â° as characteristic peak of gold particles.Keywords: Isotherm adsorption reductive, AuCl4Â¯ , humic acid, Freundlich.

PENGARUH PENGASAMAN PADA SPESIASI CU(II) DALAM SISTEM ASAM HUMAT-AIR Sunarsih, Sri; Santosa, Sri Juari; -, Mudasir
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The influences of acidify and humic acid (HA) weight on Cu(II) speciation in humic acid-water system has been studied. The HA was extracted from peatsoil in Siantan, Pontianak, West Kalimantan. The Cu(II) solution was made from Cu(SO)4.s H2O crystal of E.Merck for analytical grade. The acidify effect test carried out with 50 mL of Cu(II) solution in 100 ppm concentration then varied their pH level at 4, 5 ,6, 7 and 8. To each solution added with 30 mg of HA, be interacted in 1 hour, and then settled in 24 hour to be equilibrium. The same procedure were done to prepare the solutions for determining the effect of HA weight on Cu(II) speciation. The weight of HA varied at 20, 40, 60, 80 and 120 mg with pH solution 5,0. The concentration of total Cu and hydrated Cu(II) were determined using Atomic Absorption Spectrophotometer and Ionic Selective Electrode (ISE), respectively. Based on measurement of total Cu and hydrated Cu known that if the initial pH of solution higher, the absorption of Cu to HA became higher too. The fraction that was not absorbed distributed as hydrated Cu and Cu-AH complex that their concentration was in equilibrium at pH value of 5,0. The result of pH measurement at the equilibrium, the value of Ksp Cu(OH)2 and calculation of OH- indicated that there were no deposition of Cu(OH)2 formed. The measurement also indicated that if the more weight of HA applied on the interaction, the absorption to Cu became higher. The fraction that was not adsorbed increasingly as Cu-AH complex.

Application of Humic Acid Isolated From Kalimatan Peat Soil Modifying Magnetite for Recovery of Gold Rahmayanti, Maya; Abdillah, Guliston; Santosa, Sri Juari; Sutarno, Sutarno
Jurnal Bahan Alam Terbarukan Vol 8, No 2 (2019): December 2019 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v8i2.20392

Humic acid modifying magnetite particles (Mag-HA) were developed for recovery of gold from chloride solution (HAuCl4). The Mag-HA particles were prepared by co-precipitation procedure with Fe(III) and Fe(II) chloride salts, sodium hydroxide, and humic acid. FTIR characterization for Mag-HA after modification indicated the presence of the specific absorption for functional groups of humic acid and Fe-O bonds, though with lower intensity. The Mag-HA particles exhibited a typical superparamagnetic characteristic with a saturation magnetization of 66.99 emu/g. The Mag-HA particles were applied for AuCl4- adsorption and results showed that the optimum adsorption of [AuCl4]- onto Mag-HA was found at pH 3. The adsorption kinetics can be described by a pseudo-second order equation and the adsorption isotherm of the Mag-HA particles agreed well with Langmuir adsorption equation. The maximum adsorbed amount of [AuCl4]- was 0.62 mmol/g and the XRD analysis confirms that the adsorption of Au(III) by Mag-HA was accompanied by the formation of elemental gold.

DESORPSI ION EMAS(III) DALAM SISTEM MULTILOGAM AU/NI/AG DENGAN MENGGUNAKAN VARIASI TIOUREA-HCL Manuhutu, Julita; Nuryono, Nuryono; Santosa, Sri Juari
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Prodi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp56-63

Desorption of gold(III) in multi-metal system Au/Ni/Ag on amino silica hybrid (ASH) column have been studied. ASH was synthesized by sol gel process with sodium silicate (Na2SiO3) from rice husk ash (RHA) as precursor. ASH was synthesized by adding 3M of hydrochloride acid solution to the mixture of (3-aminopropyl)-trimethoxysilane and Na2SiO3 solution untill pH 7 (neutral). ASH was characterized by infrared spectroscopy (IR) and X-ray diffraction (XRD). Adsorption of multi-metal (Au/Ni/Ag) was carried out with a column technique. The adsorbed metal ions [Au(III), Ni(II), and Ag(I)] were quantitively using atomic absorption spectroscopy (AAS). Desorption of Au(III), Ni(II), and Ag(I) at ASH was conducted by using thioruea in hydrochloride solution with variation of concentration. Total desorption of metal ions was calculated based on AAS analysis. For desorption of multi-metal(Au / Ni / Ag), Au (III) was eluted using 1M HCL is 16,60%; using 0,5 M thiourea in 1M HCl is 57,45%, and with 1M thiourea in 1M HCl is 59,12%.

PENGARUH PENGASAMAN PADA SPESIASI CU(II) DALAM SISTEM ASAM HUMAT-AIR Sunarsih, Sri; Santosa, Sri Juari; -, Mudasir
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v6i1.592

The influences of acidify and humic acid (HA) weight on Cu(II) speciation in humic acid-water system has been studied. The HA was extracted from peatsoil in Siantan, Pontianak, West Kalimantan. The Cu(II) solution was made from Cu(SO)4.s H2O crystal of E.Merck for analytical grade. The acidify effect test carried out with 50 mL of Cu(II) solution in 100 ppm concentration then varied their pH level at 4, 5 ,6, 7 and 8. To each solution added with 30 mg of HA, be interacted in 1 hour, and then settled in 24 hour to be equilibrium. The same procedure were done to prepare the solutions for determining the effect of HA weight on Cu(II) speciation. The weight of HA varied at 20, 40, 60, 80 and 120 mg with pH solution 5,0. The concentration of total Cu and hydrated Cu(II) were determined using Atomic Absorption Spectrophotometer and Ionic Selective Electrode (ISE), respectively. Based on measurement of total Cu and hydrated Cu known that if the initial pH of solution higher, the absorption of Cu to HA became higher too. The fraction that was not absorbed distributed as hydrated Cu and Cu-AH complex that their concentration was in equilibrium at pH value of 5,0. The result of pH measurement at the equilibrium, the value of Ksp Cu(OH)2 and calculation of OH- indicated that there were no deposition of Cu(OH)2 formed. The measurement also indicated that if the more weight of HA applied on the interaction, the absorption to Cu became higher. The fraction that was not adsorbed increasingly as Cu-AH complex.

Modified Humic Acid from Peat Soils with Magnetite (Ha-Fe3O4) by Using Sonochemical Technology for Gold Recovery Rahmayanti, Maya; Santosa, Sri Juari; Sutarno, Sutarno
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.26131

Sonochemical technology is a technology that involves ultrasonic waves in chemical reactions. In this study, humic acid isolated from peat soil has been successfully modified with magnetite (HA-Fe3O4) using sonochemical technology. Characterization of the physical and chemical properties of HA-Fe3O4 was carried out using FTIR, XRD, SEM and VSM. HA-Fe3O4 was used for recovery of gold from simulated gold waste (HAuCl4). FTIR characterization showed that the interaction between HA and Fe3O4 was through hydrogen bonds. The crystal size of HA-Fe3O4 using the Debye-Scherrer equation based on the XRD diffractogram was 12.4 nm. The saturation magnetization value of HA-Fe3O4 obtained was 52.80 emu/g. Adsorption studies at various pH showed that HA-Fe3O4 has been successful in recovering of gold from simulated gold waste. The % recovery of gold was 99%. Gold recovery occurs through the adsorption process followed by reduction of Au (III) to Au(0).

KAJIAN ADSORPSI Ag(S2O3)2 3- DALAM LIMBAH FOTOGRAFI PADA ADSORBEN KITIN DAN ASAM HUMAT TERIMOBILISASI PADA KITIN Khoerunnisa, Fitri; Santosa, Sri Juari; Kunarti, Eko Sri
Jurnal Pengajaran MIPA Vol 9, No 2 (2007): JPMIPA: Volume 9, Issue 2, 2007
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v9i2.35754

This work was started with isolation of humic acid from peat soil and chitin from crab shell, immobilization of humic acid on chitin, and characterization of adsorbents of C and HAC. Optimum condition was studied by interacting the adsorbents with Ag(S2O3)2 3- in a synthetic solution on various of pH from 2 to 10. Adsorption rate was studied by interacting the adsorbent with Ag(S2O3)2 3- in the synthetic solution on various time from 2 to 120 minutes. The determination of the energy and the capacity of adsorption were studied by interacting the adsorbent with Ag(S2O3)2 3- on various initial concentration from 2 to 75 ppm. Moreover, the mechanism of adsorption was studied by applying a sequential desorption using H2O, Na2EDTA 0.1 M, KSCN 0.5 M, and KOH 1 M. The adsorption of Ag(S2O3)2 3- in photography wastewater on C and on HAC were studied at the same condition as obtained for the synthetic solution. The result showed that pH 2 was the optimum adsorption condition for Ag(S2O3)2 3- in the synthetic solution on both C and HAC adsorbents. Ag(S2O3)2 3- in the synthetic solution was chemically adsorbed on C and on HAC, involving energy adsorption of 22.74â€“23.30 kJ/mole, respectively. Adsorption of Ag(S2O3)2 3- on C was faster than that on HAC with the rate constants for adsorbent C and HAC were 73 x 10-4 and 46 x 10-4 minute-1 , respectively. Adsorption capacity of Ag(S2O3)2 3- on C and on HAC were 2.107 x 10-4 and 1.818 x 10-4 mole/g, respectively. The amount of Ag(S2O3)2 3- in photography wastewater that was adsorbed on C and on HAC were 13.52 and 12.47 mg/L, respectively. The hydrogen bonding and ion exchange were the dominant mechanism of adsorption.

Synthesis, Characterization, and Application of Magnetite (Fe3O4) Particles as Gold Adsorbent from Simulation Waste Maya Rahmayanti; Sri Juari Santosa; Sutarno Sutarno; Hilmi Hamidi; Lingga Binagara
CHEMICA: Jurnal Teknik Kimia Vol 7, No 2 (2020): Desember 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v7i2.17957

There have been many magnetic adsorbents in solid phase extraction to recover gold metal known as Magnetic Solid Phase Extraction (MSPE). In this study, magnetite was synthesized using the reverse coprecipitation method with the precipitating agent NaOH. The synthesized material was characterized using a Fourier Transform Infrared (FTIR) spectrophotometer, X-Ray Diffraction (XRD), Vibrating Sample Magnetometer (VSM), and Scanning Electron Microscopy (SEM). The magnetite was then applied as a gold adsorbent from simulated waste (HAuCl4). The effect of acidity on the performance of magnetite as gold adsorbent was studied at various pH ranges. Based on the results of characterization using FTIR, magnetite has been successfully synthesized, marked by the appearance of a typical absorption for Fe-O bonds at a wave number of 578 cm-1. It is amplified with an XRD diffractogram, which gives peaks similar to a standard magnetite diffractogram. The value of the magnetite saturation magnetization was 93.90 emu/g. Based on application studies, [AuCl4] adsorption on magnetite was excellent in the pH range 3-5. The presumed interactions between [AuCl4]- and magnetite were through electrostatic (dipol-ion) interactions, hydrogen bonding, and redox reactions.

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