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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Natur Indonesia Seminar Nasional Teknik Kimia Kejuangan CHEMPUBLISH JOURNAL Science and Technology Indonesia Fullerene Journal of Chemistry Jurnal Sains dan Edukasi Sains Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN
Tien Setyaningtyas
Jurusan Kimia FMIPA Universitas Jenderal Soedirman
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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Isolasi, Pemurnian dan Karakterisasi Lipase Bakteri Hasil Skrining dari Tanah Tempat Pembuangan Akhir (TPA) Gunung Tugel Banyumas Zusfahair, Zusfahair; Setyaningtyas, Tien; Fatoni, Amin
Jurnal Natur Indonesia Vol 12, No 2 (2010)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.835 KB) | DOI: 10.31258/jnat.12.2.124-129

Abstract

A bacterial lipase producer was isolated from garbage dump soil and was identified its genus. Lipase was extractedaccording to production time optimized, purified using ammonium sulfate fractionation and gel chromatograph.Determination of enzyme characteristic studied were influence of pH, temperature, various metals to lipaseactivity. The result of this research shows that the genus of isolated bacteria which produced lipase wasAcinetobacter sp., the lipase optimum production time is about 18 hours with the activity is about 115 unit/mL. Thehighest activity of lipase fractionation using ammonium sulfate is about 45% and the highest activity of purifyingwith filtration gel chromatograph column using Sephadex G-150 at 24 th fraction. Lipase from crude extract andpurifying product at this fraction has optimum pH 6 and optimum temperature is about 40 oC. Lipase to be classifiedas metalloenzyme that shows with decreasing the activity after added the EDTA. Metals ion, such as Cu 2+ and Zn2+were inhibited the lipase activity. Ca 2+ ion could increase lipase crude extract activity but inhibited the activity oflipase purifying product. Hg2+ ion could increase the activity of lipase purifying product.
Pengaruh Pemanasan Tanah Diatome terhadap Kemampuan Adsorpsi Cd (II) dalam Pelarut Air Setyaningtyas, Tien; Sriyanti, Sriyanti
Jurnal Kimia Sains dan Aplikasi Vol 6, No 3 (2003): Volume 6 Issue 3 Year 2003
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2808.983 KB) | DOI: 10.14710/jksa.6.3.1-4

Abstract

Telah dilakukan penelitian tentang pengaruh pemanasan tanah diatome terhadap kemampuan adsorpsi logam kadmium (II) dalam pelarut air. Parameter eksperimen meliputi temperatur pemanasan, waktu kesetimbangan dan kapasitas adsorpsi.Kapasitas adsorpsi ditentukan melalui penggunaan isoterm adsorpsi Langmuir yang menekankan pembentukan lapisan monomolekuler sebagai konsekwensi interaksi kimia antara ion logam dan gugus aktif adsorben. Peranan gugus siloksan dipelajari dengan membandingkan perilaku adsorpsi ion logam pada permukaan tanah diatome dengan jumlah relatif gugus siloksan yang berbeda. Secara eksperimen langkah ini dilakukan dengan menggunakan sistem “batch shaker”.Hasil eksperimen menunjukkan bahwa pemanasan tanah diatome mempengaruhi jumlah gugus siloksan. Jumlah gugus siloksan bertambah dengan naiknya temperatur pemanasan tanah diatome dan menurunkan kapasitas adsorpsi kadmiun (II). Temperatur pemanasan tanah diatome pada 100 oC mempunyai kapasitas adsorpsi paling besar yaitu 39,34 mg/g. Kapasitas adsorpsi kadmium (II) pada tanah diatome alam dan pada pemanasan 500 oC, 900 oC masing-masing adalah 29,22 mg/g ; 23,18 mg/g ; 12,3 mg/g.
Sintesis dan Karaterisasi CuO/rGO Maulana, M Sifal; Riyani, Kapti; Setyaningtyas, Tien
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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

Abstract

Semiconductor material is a material that is widely used in the chemical industry, especially as a photocatalyst. CuO is a semiconductor material that is active in the visible light range. Semiconductor materials can undergo recombination, rGO was used as a composite material into CuO to reduce recombination in this study. This study aims to look at the characteristics of the synthesized CuO/rGO. The processes performed include synthesis of CuO/rGO and characterization of CuO/rGO. The XRD results show the peaks of the diffractogram indicating of rGO peaks interpreted (002), peaks at (110), (-111), (111), (-202), (020), (202), (-113), (- 331), (220), (311) and (004) indicate the monoclinic phase of CuO has been formed. FTIR results indicating Cu-OH absorption show peak at wave numbers 3441.0 cm-1 and 894.97 cm-1, O-C-O vibrations present in CuO/rGO indicating adsorption at 2360.8 cm-1, 1975.1 and 1512 .1 cm-1 appears due to the C=C stretching vibrations in the rGO layer, 1033.8 cm-1 absorbs C-O stretching vibrations and 609.51 and 439.77 cm-1 have relative peaks indicating Cu-O stretching vibrations. The DRS results show that CuO/rGO has band gap value of 1.54 eV.
Degradasi Zat Warna Congo Red Menggunakan Komposit TiO2 Termodifikasi Bentonit-Alginat Paramitha, Sylvia; Riyani, Kapti; Setyaningtyas, Tien
Jurnal Kimia Fullerene Vol 9 No 2 (2024): Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v9i2.705

Abstract

Congo red is a synthetic dye whose waste needs to be minimized using a photodegradation method with bentonite-alginate-modified TiO2 composite as a photocatalyst. This research aims to determine the characteristics of bentonite-alginate modified TiO2 composite and its effect as a photocatalyst in the degradation of congo red. The bentonite-alginate modified TiO2 composite has a characteristic band gap energy of 3.07 eV with TiO2 diffraction peaks in the anatase, bentonite, and semi-crystalline alginate phases with irregular sphere-like morphology. Bentonite-alginate modified TiO2 composite showed the best activity at pH 7 for 3 hours of irradiation with a TiO2-bentonite mass ratio of 2:4 which showed a degradation percentage of 38.86% in UV light and 44.95% in visible light.
Nigella Sativa-mediated Synthesis of BiVO4/g-C3N4 Composites for the Removal of Methylene Blue Dye Haryadinaru, Ghinatanitha Haqqu; Setyaningtyas, Tien; Riapanitra, Anung
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 2 Year 2025 (August 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20354

Abstract

This study investigates the synthesis and photocatalytic performance of BiVO4-Nigella Sativa/g-C3N4 composites for the degradation of methylene blue dye. The composites were synthesized using a coprecipitation method and characterized through various techniques, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), UV-Vis diffuse reflectance spectroscopy (DRS), Brunauer-Emmett-Teller (BET) surface area analysis, and scanning electron microscopy (SEM) to determine their crystal structure, chemical composition, morphology, adsorption and photocatalytic abilities. A variation of mass ratios of BiVO4 to g-C3N4 of 1:2, 1:3, and 1:4 was used in this investigation. The photocatalytic test results indicated that the composite with a mass ratio of 1:2 achieved the highest methylene blue degradation, reaching 91.73%, which was primarily attributed to an adsorption activity of 81.12% and a photocatalytic degradation of 10.60%. The photocatalytic activity was significantly enhanced under alkaline conditions, particularly at pH levels between 9 and 10, which facilitated the formation of reactive oxygen species (ROS). The study highlights the synergistic effects of the BiVO4 and g-C3N4 combination, which promotes efficient charge transfer, reduces electron-hole recombination, and expands light absorption due to a decrease in the effective bandgap energy. Overall, the findings indicate that BiVO4-Nigella Sativa/g-C3N4 composites have considerable potential for application in wastewater treatment, particularly for the remediation of organic dye pollutants. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Adsorption of Malachite Green Dye by Magnetic Carboxymethyl Chitosan Kurniasih, Mardiyah; Setyaningtyas, Tien; Riyani, Kapti; Luthfia, Adilla; Aghniya, Imtiyazul
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 2 (2024): Jurnal Rekayasa Kimia & Lingkungan (December, 2024)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i2.36424

Abstract

Malachite green dye is widely used in the textile industry. Wastewater contaminated with malachite green dye threatens aquatic life and human health. Therefore, adsorption is needed in the dye waste treatment process. This research aims to synthesize magnetic carboxymethyl chitosan as an adsorbent for malachite green dye. Magnetic carboxymethyl chitosan was synthesized via a coprecipitation method and analyzed using FTIR. Batch experiments were used to study the adsorption of malachite green dye under adsorption parameters, such as the effects of pH and time, adsorption kinetics, isotherms, and reusability. The research results show that at pH 4, malachite green adsorbed most effectively into magnetic carboxymethyl chitosan. The pseudo-second-order kinetic model and the Langmuir adsorption isotherm model describe the adsorption process. Reduction for malachite green chitosan, carboxymethyl chitosan, and magnetic carboxymethyl chitosan were 34.19, 83.24, and 91.34%, respectively.
Construction of Ternary Heterojunction g-C3N4 /BiVO4 /GQDs Nanocomposite and Its Methylene Blue Photodegradation Performance Arieveali, Heroldinho; Setyaningtyas, Tien; Riyani, Kapti; Riapanitra, Anung
Science and Technology Indonesia Vol. 10 No. 3 (2025): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.3.777-788

Abstract

Ternary heterojunction g-C3N4/BiVO4/GQDs (CBG) composite photocatalysts were successfully made by high-temperature solidstate method. The prepared CBG photocatalyst was used to degrade the methylene blue (MB) solution under the simulation of visible light irradiation. The analysis of photocatalytic activity was carried out in the parameters of mass variation of composite components, pH of MB solution, and kinetic rate measurement. The results showed that the adsorption-photocatalysis synergy effect occurred at its best in CBG-20 samples with pH 9 in MB solution with a degradation kinetic rate following the pseudo-first order within 150 min of removal time as the optimum condition that could degrade MB by 94.81%. The result showed that the photocatalytic activity of theternary composite was higher than that of pristine g-C3N4, BiVO4, or the binary composite of g-C3N4/BiVO4. Trapping experiments results support the direct dual Z-scheme which shows that ·O2- is the most significant radical for the photocatalytic degradation of MB. The prepared ternary composites show outstanding application prospects in wastewater treatment.
Modification of ZnO/Perlite for Methylene Blue Photodegradation Burhanudin; Setyaningtyas, Tien; Riyani, Kapti
Chempublish Journal Vol. 8 No. 2 (2024): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v8i2.37550

Abstract

Penggunaan Komposit ZnO/Perlite untuk Fotodegradasi Zat Warna Metilen Biru Burhanudin, Burhanudin; Setyaningtyas, Tien; Riyani, Kapti
Jurnal Sains dan Edukasi Sains Vol. 8 No. 2 (2025): Jurnal Sains dan Edukasi Sains
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/juses.v8i2p150-158

Abstract

Limbah pembuangan pada industri yang semakin berkembang menyebabkan pencemaran yang disebabkan oleh zat pencemar. Limbah cair yang berasal dari industri tekstil adalah salah satu limbah yang mengandung zat warna beracun seperti metilen biru yang tidak mudah terurai di lingkungan. Maka dari itu, perlu dilakukan suatu cara untuk mengatasi permasalahan tersebut dengan material fotokatalisis. Material fotokatalis yang sering digunakan yaitu oksida logam semikonduktor seperti ZnO. Namun, semikonduktor ZnO masih memiliki keterbatasan dalam aplikasinya. Untuk mengatasi keterbatasan tersebut, katalis ZnO akan dikombinasikan dengan material pendukung seperti perlite yang merupakan material berpori dan ringan. Penelitian ini bertujuan untuk menguji keefektifan ZnO/Perlite dalam mendegradasi zat warna metilen biru. Komposit ZnO/Perlite dengan komposisi 20% menunjukkan aktivitas fotokatalitik yang paling tinggi dibandingkan komposit ZnO/Perlite dengan komposisi 30% dan 10%. Kondisi optimum pada komposit ZnO/Perlite 20% dalam mendegradasi metilen biru dicapai pada kondisi pH 11 dengan massa 0,3 gram dan penyinaran sinar ultraviolet selama 2 jam, aktivitas fotokatalitik yang dihasilkan sebesar 47,59% serta gabungan adsorpsi dan aktivitas fotokatalitik sebesar 78,1%. Pada analisis XRD diperoleh karakteristik puncak kristal ZnO berstruktur wurtzite pada (100); (002); (101); (102); (110); (103); dan (112); sedangkan sudut difraksi 2θ (10o-30o) menunjukkan sifat amorf perlite. Pada hasil DRS diperoleh bahwa komposit ZnO/Perlite 20% memiliki nilai celah pita (band gap) sebesar 3,21 eV.
Co-Authors Aghniya, Imtiyazul Ali Djamhuri AMIN FATONI Anung Riapanitra Arieveali, Heroldinho Burhanudin Burhanudin Burhanudin Haryadinaru, Ghinatanitha Haqqu Kapti Riyani Luthfia, Adilla Mardiyah Kurniasih Maulana, M Sifal Paramitha, Sylvia Zusfahair Zusfahair