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All Journal Jurnal Penelitian Saintek JURNAL KIMIA SAINS DAN APLIKASI Jurnal Pengajaran MIPA Pharmaciana: Jurnal Kefarmasian Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Jurnal Zeolit Indonesia JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Chimica et Natura Acta Molekul: Jurnal Ilmiah Kimia Jurnal Ilmiah Berkala: Sains dan Terapan Kimia

Eko Sri Kunarti

UGM

Author-ID : 301057

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Education Engineering Environmental Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology

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SINTESIS SILIKA MCM-41 DAN UJI KAPASITAS ADSORPSI TERHADAP METILEN BIRU Ahda, Mustofa; Kunarti, Eko Sri
PHARMACIANA Vol 3, No 1: Mei 2013
Publisher : PHARMACIANA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (82.03 KB)

Telah disintesis MCM-41 dengan variasi waktu hidrotermal 18, 24, 36, 48 jam menggunakan agen pengarah struktur cetiltrimetilammonium bromida (CTAB). Hasil penelitian menunjukkan bahwa waktu hidrotermal mempengaruhi intensitas dan indeks bidang (ao). Sintesis MCM-41 dengan waktu hidrotermal 24 jam menghasilkan intensitas tertinggi yang menunjukkan bahwa MCM-41 memiliki kristalinitas terbaik.sedangkan uji kapasitas MCM-41 tersebut memiliki kemampuan adsorpsi terhadap metilen biru sebesar 37,037 mg/g.

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.

Carboxymethyl Cellulose Photocracking by Magnetic Recoverable Photocatalyst to Produce Biofuel in Ambient Condition Ramanda, Yudha; Thomas, Kevin; Aziz, Saifuddin; Mauludi, Kurniawan; Kunarti, Eko Sri
Chimica et Natura Acta Vol 5, No 2 (2017)
Publisher : Departemen Kimia

Synthesis of Fe3O4/SiO2/TiO2 nanocomposite and its application as photocatalyst in Carboxymethyl Cellulose (CMC) photocracking had been conducted. Magnetite preparation was carried out by sono-coprecipitation method. The deposition of SiO2 and TiO2 were performed by sol-gel method under ultrasonic irradiation. All material products were characterized by X-ray diffraction (XRD), Fourier transform infra-red spectrophotometry (FT-IR), and transmission electron microscopy (TEM). The final material product was also analysed by specular reflectance UV-Visible (SR-UV-Vis). The product of photocracking was analysed by gas chromatography â mass spectrometry (GC-MS).The XRD diffractogram and FT-IR spectra confirmed the presence of Fe3O4, SiO2, and anatase phase of TiO2. The TEM image revealed the presence of nanocomposite with core-shell structure. The SR-UV-Vis spectrum was used to determine band gap energy of the photocatalyst and it gave a result of 3.22 eV. The GC chromatogram of photocracking product indicated some major fractions. The MS spectra showed that some major fractions were smaller molecules including methanol, the component of biofuel.

PENGARUH WAKTU HIDROTERMAL DAN TMAOH DALAM SINTESIS LANGSUNG MCM-41 Ahda, Mustofa; Sutarno, Sutarno; Sri Kunarti, Eko
Pharmaciana Vol 5, No 1 (2015): Pharmaciana
Publisher : Universitas Ahmad Dahlan

The MCM-41processing synthesis with variation time hydrothermal and TMAOH at directsynthesis process has been done. The synthesis of MCMâ41 was used templating agents withcetiltrimetilammonium bromide (CTAB). The optimization of synthesis of MCM-41 was carried outto produce good material characteristics. Hydrothermal time variation performed in the synthesis ofMCM-41 for 18 hours, 24 hours, 48 hours and 88 hours has been done. So the study of effect TMAOHwas used CTAB/ TMAOH ratio: 1 and 1.25. The results showed that the 24- hour time hydrothermalwas able to produce the good crystallinity with 100% relative crystallinity. However, the best stabilityof MCM-41 materials synthesized in hydrothermal time during the 48 hours. So the effect ofTMAOH additions in the synthesis MCM-41 can bedecreased crystallinity of MCM-41.

SINTESIS SILIKA MCM-41 DAN UJI KAPASITAS ADSORPSI TERHADAP METILEN BIRU ahda, Mustofa; Sutarno, Sutarno; Kunarti, Eko Sri
Pharmaciana Vol 3, No 1 (2013): Pharmaciana
Publisher : Universitas Ahmad Dahlan

Synthesis of MCM-41 with hydrothermal time variation 18, 24, 36, 48 hoursusing templating agent cetiltrimetilammonium bromide (CTAB) has been done. Theresults showed that the time of hydrothermal influence the intensity and the index field(ao). Synthesis of MCM-41 with a time of hydrothermal 24 hours produce the highestintensity which indicates that MCM-41 has the best crystallinity. While testing theadsorption capacity of MCM-41 has 37,037 mg/g for adsorption of the methylene blue.

STUDI KINETIKA ADSORPSI Al-MCM 41 TERHADAP METILEN BIRU Ahda, Mustofa; Sutarno, Sutarno; Kunarti, Eko Sri
Pharmaciana Vol 6, No 1 (2016): Pharmaciana
Publisher : Universitas Ahmad Dahlan

The synthesis and kinetics studies of Al-MCM 41 of the methylene blue adsorption have been done. The observations of the adsorption kinetics are very important parameter in the adsorption process. This is the higher of adsorption kinetics tend to faster adsorption process. The results of characterization of Al-MCM 41 have a wall thickness is 15.173 Ã, Pore Volume Pore is 0.584 cm3/g, Pore Diameter is 30.446 Ã, Surface Area is 995.513 m2/g. The results of the adsorption kinetics of Al-MCM 41 toÂ methylene blue adsorption follows pseudo second order with coefficient of determination (r2) value of 0.999 and the value of adsorption rate constant of Al-MCM 41 is 10-2 g.mg-1.min-1.

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.

STUDI KINETIKA ADSORPSI Al-MCM 41 TERHADAP METILEN BIRU Mustofa Ahda; Sutarno Sutarno; Eko Sri Kunarti
Pharmaciana Vol 6, No 1 (2016): Pharmaciana
Publisher : Universitas Ahmad Dahlan

The synthesis and kinetics studies of Al-MCM 41 of the methylene blue adsorption have been done. The observations of the adsorption kinetics are very important parameter in the adsorption process. This is the higher of adsorption kinetics tend to faster adsorption process. The results of characterization of Al-MCM 41 have a wall thickness is 15.173 Ã…, Pore Volume Pore is 0.584 cm3/g, Pore Diameter is 30.446 Ã…, Surface Area is 995.513 m2/g. The results of the adsorption kinetics of Al-MCM 41 toÂ methylene blue adsorption follows pseudo second order with coefficient of determination (r2) value of 0.999 and the value of adsorption rate constant of Al-MCM 41 is 10-2 g.mg-1.min-1.

PENGARUH WAKTU HIDROTERMAL DAN TMAOH DALAM SINTESIS LANGSUNG MCM-41 Mustofa Ahda; Sutarno Sutarno; Eko Sri Kunarti
Pharmaciana Vol 5, No 1 (2015): Pharmaciana
Publisher : Universitas Ahmad Dahlan

The MCM-41processing synthesis with variation time hydrothermal and TMAOH at directsynthesis process has been done. The synthesis of MCMâ€“41 was used templating agents withcetiltrimetilammonium bromide (CTAB). The optimization of synthesis of MCM-41 was carried outto produce good material characteristics. Hydrothermal time variation performed in the synthesis ofMCM-41 for 18 hours, 24 hours, 48 hours and 88 hours has been done. So the study of effect TMAOHwas used CTAB/ TMAOH ratio: 1 and 1.25. The results showed that the 24- hour time hydrothermalwas able to produce the good crystallinity with 100% relative crystallinity. However, the best stabilityof MCM-41 materials synthesized in hydrothermal time during the 48 hours. So the effect ofTMAOH additions in the synthesis MCM-41 can bedecreased crystallinity of MCM-41.

Co-Authors - Jumaeri Aziz, Saifuddin Bambang Rusdiarso Buhani Buhani Danar Danar Dwi Rasy Mujiyanti Endang Tri Wahyuni Feri Eka Hermawan, Feri Eka Fitri Khoerunnisa Gusrizal Gusrizal Holyness Nurdin Singadimedja Indi Annisa Hapsari Indriana Kartini Mauludi, Kurniawan Mustofa Ahda Mustofa Ahda Narsito Narsito Narsito Narsito Narsito Narsito Nuryono Nuryono Nuryono Nuryono Nuryono Nuryono Ramanda, Yudha Sampe Baralangi, Sampe Siti Sulastri Sri Juari Santosa Sri Juari Santosa Sutarno Sutarno Sutarno, Sutarno Thomas, Kevin

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