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All Journal Jurnal Ilmiah Farmasi EKSAKTA: Journal of Sciences and Data Analysis Jurnal Ilmu Dasar Jurnal Sains dan Teknologi Indonesian Journal of Chemistry IJCER (International Journal of Chemistry Education Research) Akta Kimia Indonesia Indonesian Journal of Chemical Analysis (IJCA) Jurnal Teknik Kimia dan Lingkungan International Journal of Renewable Energy Development Jurnal Polimesin
Tri Esti Purbaningtias
Universitas Islam Indonesia
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology

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ADSORPSI FENOL DENGAN HIDROTALSIT Mg/Al 4:1 TERMODIFIKASI SODIUM DODECYLSULFATE (SDS) IN SITU DAN EX SITU Kurniawati, Puji; Wiyantoko, Bayu; Purbaningtias, Tri Esti
JST (Jurnal Sains dan Teknologi) Vol 6, No 1 (2017)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1096.715 KB) | DOI: 10.23887/jst-undiksha.v6i1.9438

Abstract

Hidrotalsit (HT) telah disintesis dengan menggunakan Al(NO­3)3·9H2O dan Mg(NO­3)2·6H2O pada pH 10±0,5 dengan ratio molar Mg/Al adalah 4:1. Material tersebut dimodifikasi dengan Sodium Dodecylsulfate (SDS) dengan teknik sintesis ex situ dan in situ yang dinyatakan dengan HTDS ex situ  dan HTDS in situ. Hasil karakterisasi FTIR menunjukkan munculnya puncak spektra infrared yang tajam pada 2920, 2851 dan 1065 cm-1 yang menunjukkan adanya gugus metil, metilen dan –OSO3- pada HTDS. Karakterisasi XRD pada HT, HTDS ex situ dan HTDS in situ menunjukkan pola difraktogram yang khas untuk material hidrotalsit. Adsorpsi fenol berlangsung optimum pada pH 3, 5 dan 3 untuk HT, HTDS ex situ dan HTDS in situ. Ketiga adsorben juga mengikuti model kinetika adsorpsi pseudo orde dua dan model isoterm Langmuir. Kapasitas maksimum HT, HTDS ex situ dan HTDS in situ masing-masing adalah 27,55; 17,64 dan 29,94 mg/g.
PENGARUH WAKTU AGING PADA MODIFIKASI PORI ZEOLIT ALAM DENGAN CTABR purbaningtias, tri esti; Kurniawati, Puji; wiyantoko, bayu; prasetyoko, didik; suprapto, suprapto
JST (Jurnal Sains dan Teknologi) Vol 6, No 2 (2017)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (851.024 KB) | DOI: 10.23887/jst-undiksha.v6i2.9322

Abstract

Penelitian bertujuan untuk melihat pengaruh waktu aging pada sintesis material mesopori. Material mesopori hasil sintesis dikarakterisasi dengan XRD, FTIR dan fisisorpsi nitrogen. Analisis XRD menunjukkan bahwa variasi waktu aging berpengaruh pada struktur mesopori dari zeolit alam (MZ). Spektrum FTIR menunjukkan adanya silanol dan siloksan pada sampel MZ dan MMZ. Hal ini membuktikan bahwa sampel MZ dan MMZ pada semua variasi waktu aging merupakan material kaya silika. Analisis fisisorpsi nitrogen memberi informasi bahwa penambahan waktu aging menyebabkan diameter pori yang lebih besar dan luas permukaan spesifik yang lebih kecil serta dibandingkan dengan bahan baku (zeolit alam, MZ) karena keterlibatan surfaktan kationik (CTABr) selama sintesis.
Kinetic study of Cr(VI) Adsorption on Hydrotalcite Mg/Al with Molar Ratio 2:1 Puji Kurniawati, Bayu Wiyantoko, Angga Kurniawan, Tri Esti Purbaningtias
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 13, ISSUE 1-2, August 2013
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol13.iss1-2.art2

Abstract

Chromium(VI) is one of the metals that is harmful to biota and humans if large amount present in environments. One method for reducing metal contamination of Cr(VI) inaqueous is by adsorption using Mg/Al hydrotalcite with molar ratio 2:1. This study is determined the effect of contact time and adsorption models of Cr(VI) adsorption on Mg/Al hydrotalcite with molar ratio 2:1. Capacity of Cr(VI) adsorption on Mg/Al hydrotalciteoccursat the optimum contact time of 180 minutes with 93.81% percent adsorption. Adsorption kinetics model equations are analyzed with first order, second order, pseudo first order, pseudo second order, Elovich equation, the equation Dumwald-Wagner and Weber-Morris equation. Analysis model of adsorption kinetics of Cr(VI) followed pseudo second order models are characterized by the highest coefficient of determination, which is 0.998.Keywords: adsorption, Mg/Al hydrotalcite, Cr(VI), adsorption kinetic models
Adsorption Isotherm of Cr(VI) Using Mg/Al Hydrotalcite with Molar Ratio 2:1 Bayu Wiyantoko; Puji Kurniawati; Tri Esti Purbaningtias
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 14, ISSUE 1, February 2014
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Abstract

Hydrotalcite is a material which is used in various application and one of them as an adsorbent of Cr(VI). Hydrotalcite was synthesized using co-precipitation method with Al(NO­3)3.9H2O and Mg(NO3)2.6H2O as raw materials. This research aim to study the initial concentration and adsorption isotherm of Cr(VI) by using Mg/Al hydrotalcite in 180 minutes contact time. The Optimum initial concentration of Cr(VI) was 675 mg/L with 55,57 mg/g adsorption capacity. Isotherm adsorption was studied using Langmuir and Freundlich model. Based on the result, the adsorption of Cr(VI) fitted well with Langmuir isotherm model by 0,997 coefficient of determination
Adsorption Isotherm of Cr(VI) Using Mg/Al Hydrotalcite with Molar Ratio 2:1 Bayu Wiyantoko; Puji Kurniawati; Tri Esti Purbaningtias
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 14, ISSUE 1, February 2014
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Hydrotalcite is a material which is used in various application and one of them as an adsorbent of Cr(VI). Hydrotalcite was synthesized using co-precipitation method with Al(NO­3)3.9H2O and Mg(NO3)2.6H2O as raw materials. This research aim to study the initial concentration and adsorption isotherm of Cr(VI) by using Mg/Al hydrotalcite in 180 minutes contact time. The Optimum initial concentration of Cr(VI) was 675 mg/L with 55,57 mg/g adsorption capacity. Isotherm adsorption was studied using Langmuir and Freundlich model. Based on the result, the adsorption of Cr(VI) fitted well with Langmuir isotherm model by 0,997 coefficient of determination
Decreasing in Acid Number of Patchouli Oil by Different Natural Adsorbent and Variation of Contact Time Tri Esti Purbaningtias; Bayu Wiyantoko; Puji Kurniawati; Mustika Kusuma Sari
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 14, ISSUE 1, February 2014
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Abstract

One way for improving (of improving atau to improve) the quality of patchouli oil was to reduce the acid number. Acid number could be reduced with the use of natural adsorbents. The decreasing percentage acid number of patchouli oils using adsorbents zeolites, bentonite, rub ash, and activated carbon, respectively 4.71 %; 1.45%; 7,84%; and 4.64%. The contact time could influence the decrease in acid number of patchouli oil. The longer the contact between adsorbent and oil could caused a decrease in acid number. Maximum contact time for rub ash was 15 hours with a maximum adsorption capacity of 14,34% for 0.1 gram adsorbent
Decreasing in Acid Number of Patchouli Oil by Different Natural Adsorbent and Variation of Contact Time Tri Esti Purbaningtias; Bayu Wiyantoko; Puji Kurniawati; Mustika Kusuma Sari
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 14, ISSUE 1, February 2014
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

One way for improving (of improving atau to improve) the quality of patchouli oil was to reduce the acid number. Acid number could be reduced with the use of natural adsorbents. The decreasing percentage acid number of patchouli oils using adsorbents zeolites, bentonite, rub ash, and activated carbon, respectively 4.71 %; 1.45%; 7,84%; and 4.64%. The contact time could influence the decrease in acid number of patchouli oil. The longer the contact between adsorbent and oil could caused a decrease in acid number. Maximum contact time for rub ash was 15 hours with a maximum adsorption capacity of 14,34% for 0.1 gram adsorbent
Pore Structure and Morphology Characterizations of Mesoporous ZSM-5 Synthesized at Various Aging Time Djoko Hartanto; Tri Esti Purbaningtias; Hamzah Fansuri; Didik Prasetyoko
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.394 KB)

Abstract

Mesoporous ZSM-5 has been successfully synthesized at various aging time of 6, 12 and 24 h. Mesoporous ZSM-5 was synthesized using cetyltrimethylammonium bromide (CTABr) as a template. Synthesis was carried out hydrothermally with aging and crystallization temperature at 60oC and 150oC. XRD patterns of the resulted material showed diffraction lines at 2θ = 23o and at small angle (2θ < 5o) which is characteristic of the structure of ZSM-5 and the existing of the mesoporous material. It was found that crystallinity of the sample increased at longer aging time. The result of nitrogen gas sorption analysis showed that all samples have pore size about 3,8 nm. The porosity of ZSM-5 decreased with shorter of aging time. ZSM-5 synthesized at 6 h aging time has the highest porosity of 72.57%. Aging time also affected the particle size, the longer the aging time, the smaller the particle size. The particle size was ranging 1.25 – 1.0 μm.
PENGARUH PENAMBAHAN SURFAKTAN PADA MODIFIKASI MATERIAL ALAM Tri Esti Purbaningtias; Puji Kurniawati; Bayu Wiyantoko; Didik Prasetyoko; Suprapto Suprapto
Akta Kimia Indonesia Vol 4, No 2 (2019)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (830.994 KB) | DOI: 10.12962/j25493736.v4i2.5536

Abstract

Penelitian ini berkaitan dengan pengembangan bahan alam dari zeolit alam, sekam padi dan ampas tebu. Modifikasi bahan alam dilakukan dengan menggunakan cetyltrimethyllammonium bromide (CTAB) sebagai surfaktan kationik untuk templat mesopori. Karakter fisikokimia bahan alam yang termodifikasi dan tanpa modifikasi diselidiki dengan menggunakan XRF, XRD, FTIR, fisisorpsi nitrogen, dan SEM-EDX. Kandungan utama dari bahan alam adalah Silika (Si) yang dibuktikan dari analisis XRF. Analisis XRD menunjukkan bahwa modifikasi dengan penambahan surfaktan dapat menyebabkan penurunan kristalinitas zeolit alam dan ampas tebu, sedangkan kristalinitas sekam padi meningkat. Munculnya pita serapan spesifik pada hasil karakterisasi menggunakan FTIR menunjukkan adanya gugus silanol dan siloksan pada semua material yang membuktikan bahwa semua jenis material alam tersebut merupakan material ekonomis yang kaya akan silika. Sementara itu profil fisisorpsi nitrogen memberikan informasi bahwa modifikasi pori oleh surfaktan hanya berhasil pada ampas tebu. Morfologi bahan alam yang dimodifikasi dan tidak dimodifikasi serta komposisi kimia dari partikel ditunjukkan oleh SEM-EDX.
Condensation of Indole with Isatin over AlCl3/Mesoporous Aluminosilicate Tri Esti Purbaningtias; Didik Prasetyoko; Hasliza Bahruji; Yusuf Muhammad Zein; Sugeng Triwahyono; Arief Fadlan; Imroatul Qoniah
Indonesian Journal of Chemistry Vol 15, No 1 (2015)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.91 KB) | DOI: 10.22146/ijc.21224

Abstract

Aluminium chloride immobilized on mesoporous aluminosilicate was investigated as catalysts in the condensation of isatin with indole. AlCl3/mesoporous aluminosilicate (AlCl3/AM) catalysts were prepared by impregnation of 1, 5, 10 and 15 wt% AlCl3 on the surface of mesoporous aluminosilicate. A maximum conversion of isatin was achieved using 15% AlCl3/AM catalyst whereas the highest selectivity of 68.97% towards trisindoline was obtained using pure AM. The activity of the catalysts was depended on their acid site number and surface area. The number of Brønsted acid and the surface area affected to the conversion of isatin while the total acidity and the number of Lewis acid influenced the selectivity.
Co-Authors Abdul Hamid Abdullah, Mohammad Aishah Abdul Jalil Amin Jakfar, S.T.,M.T., Lukman Hadiwijaya, S.T.,M.T. Arief Fadlan Armansyah, Muhammad Doni Auliana Diah Wilujeng Aurista Miftahatul Ilmah Bagoes Wibowo Bayu Wiyantoko Bayu Wiyantoko Bayu Wiyantoko Che Ku Nor Liana Che Ku Hitam Cicik Herlina Yulianti Didik Prasetyo Didik Prasetyoko Dini, Sekti Kartika Djoko Hartanto Djoko Hartanto Faizatur Rohmah Fatah, Misbakhul Febriana, Ike Dayi Fikri, Mohammad Anas Hamzah Fansuri Hanik Alfanah Hasliza Bahruji Ida Ayu Putu Sri Widnyani Ike Dayi Febriana Ike Dayi Febriana Imroatul Qoniah Jakfar, Amin Kurniawati, Puji Kurniawati, Puji Mardatillah, Wahidatun Miranda, Suci Mohammad Abdullah Mustika Kusuma Sari Mutiara Herawati, Mutiara Oktavia Indrati, Oktavia Puji Kurniawati Rahmadani, Yusi Rahmawati, Zeni Ratna Ediati Reni Banowati Istiningrum, Reni Banowati Rofi'atun Nashriyah ROHMAH, FAIZATUR Romadhonsyah, Fitra Rudy Syahputra Saiful, S. Sandy Septian Dwi Wijaya Sugeng Triwahyono Suprapto Suprapto Syafa, Muhammad Badrus Thorikul Huda tri wahyuni Wiyantoko, Bayu Wiyantoko, Bayu Yorfan Ruwindya Yoshifumi Chisaki Yusuf Muhammad Zein Zeni Rahmawati