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All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar BERKALA SAINSTEK Jurnal Kimia Riset ALCHEMY Jurnal Penelitian Kimia Indonesian Chimica Letters Molekul: Jurnal Ilmiah Kimia InSTEM Bulletin of Chemical Reaction Engineering & Catalysis
Novita Andarini
Jurusan Kimia, FMIPA, Universtas Jember Jl. Kalimantan 37 Kampus Tegalboto Jember 68121 Telp. (0331)334293 Fax. (0331)330225
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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Sintesis Lapis Tipis Zn1-XNiXO sebagai Material Fotokatalis Pendegradasi Pewarna Tekstil Roziqin, Achmad Zainur; Haryati, Tanti; Andarini, Novita
BERKALA SAINSTEK Vol 6 No 2 (2018)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v6i2.9228

Abstract

Limbah cair zat warna dapat didegradasi dengan menggunakan teknik fotodegradasi katalitik menggunakan material semikonduktor dengan bantuan paparan sinar ultraviolet (UV). Salah satu material semikonduktor yang digunakan untuk proses pendegradasian adalah zink oksida (ZnO). Metode sintesis lapis tipis Zn1-xNixO adalah sistem deposisi larutan. Pengaruh dari variasi jumlah penambahan ion dopan Ni 2+ pada sintesis lapis tipis Zn1-xNixO terhadap struktur dan komposisi dikarakterisasi menggunakan X-Ray Diffraction (XRD) dan X-Ray Fluoresence (XRF). Kinerja dari lapis tipis Zn1-xNixO sebagai fotokatalitik dipelajari melalui % degradasi limbah zat cair dalam hal ini menggunakan Procion Red MX8-B. Berdasarkan hasil karakterisasi diperoleh hasil semakin tinggi persentase ion dopan Ni2+ maka semakin tinggi kristanilitas dan semakin kecil ukuran kristal dari lapis tipis Zn1-xNixO. Begitu pula pada aktivitas fotokatalisnya semakin tinggi persentase ion dopan Ni2+ maka semakin tinggi pula persen degradasinya. Aktivitas fotokatalis optimum didapatkan pada lapis tipis dengan komposisi 5% Ni yaitu sebesar 34.5%. Kata Kunci: Lapis tipis Zn1-xNixO, fotodegradasi katalitik, limbah cair zat warna.
Synthesis Zeolite Y From Lapindo Mud With Variations Filling Autoclave And Ratio Molar Si/Al Andarini, Novita; Maziyyah, Deys Sya’fatul; Haryati, Tanti; Sulistiyo, Yudi Aris; Suwardiyanto, S.
BERKALA SAINSTEK Vol 11 No 3 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i3.39422

Abstract

Lapindo mud contains Silicate (SiO2), and Aluminum oxide (Al2O3) that can be utilized to synthesize zeolite Y. Zeolite Y was synthesized from Lapindo mud via the smelting and hydrothermal method, respectively. The thermal activation of Lapindo mud was achieved by leaching smelting at 550oC for 2 hours with NaOH to achieve thed desire adding SiO2, NaOH and aging for 48 hours. The effects of various parameters on the synthesis were investigated. The samples were characterized with X-ray Fluorescence (XRF), X-Ray Diffraction (XRD), Fourier Transformation Infrared Spectroscopy (FTIR) and Gas Sorption Analyzer (GSA). Zeolite Y with high crystallinity was synthesized under optimized conditions, such as filling autoclave 90% and a SiO2/ Al2O3 molar ratio of 15.
Effectiveness of Gold Extraction with Thiourea Solution from Gold Rocks in Mount Tumpang Pitu Pasanggaran Banyuwangi Andarini, Novita; Ramadhani, Ferlia Suci; Haryati, Tanti; Suwardiyanto
Indonesian Chimica Letters Vol. 3 No. 2 (2024)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v3i2.4107

Abstract

This research aims to determine the effect of adding an oxidizing solution in the gold extraction process using thiourea solution. The oxidizing agent used in thiourea leaching solution is FeCl3. Variations of additional volume of oxidizing solution are 0 mL, 10 mL, 20 mL, 30 mL, and 40 mL. Based on the results obtained, the addition of 30 mL oxidant FeCl3 can get optimal results. The thiourea leaching solution can extract gold as much as 46.7%.
Enhancing Water Quality: Application of Coconut Shell Activated Charcoal for Sulfide and Ammonia Removal from Tofu Industry Wastewater Asnawati, Asnawati; Novita Andarini; Mulyono, Tri; Maimunah Noer Aini; Nur Fitriyah; Siswoyo; Zulfikar; Yeni Maulidah Muflihah
Indonesian Chimica Letters Vol. 3 No. 2 (2024)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v3i2.4284

Abstract

This study investigates the optimization of an adsorption process using activated coconut shell charcoal to reduce sulfide and ammonia levels in tofu industry wastewater. These pollutants pose significant environmental risks due to their biodegradable nature. Experimental parameters, including adsorbent particle size (50, 60, and 70 mesh), heating temperature (40, 80, 120 °C, and ambient), and contact time (15-60 minutes for sulfide, 20-100 minutes for ammonia), were systematically varied to determine optimal conditions. The initial sulfide and ammonia concentrations in the wastewater exceeded regulatory limits at 0.169 mg/L and 8.177 ppm, respectively. The results indicate that 70-mesh activated charcoal at ambient temperature achieved maximum pollutant removal: 93.46% for sulfide with a 30-minute contact time and 93.693% for ammonia with a 40-minute contact time. These findings offer a promising approach to mitigating the environmental impact of tofu industry wastewater.
Two-Stage Hydrothermal Synthesis of TiO₂ Nanotubes with Variation of Precursor Type for Diazinon Photodegradation Haryati, Tanti; Assiddiq, Mustafid A’yun; Suwardiyanto, Suwardiyanto; Andarini, Novita; Sulistiyo, Yudi Aris
Jurnal Kimia Sains dan Aplikasi Vol 28, No 4 (2025): Volume 28 Issue 4 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.4.195-199

Abstract

TiO2 is commonly used as a photocatalyst for the photodegradation of harmful chemical compounds, such as diazinon. Its photocatalytic properties can be enhanced by fabricating it into nanotubes. TiO2 nanotube (TNTs) has a large surface area with good photon absorption and electron transport. This study aims to determine the effect of precursor type on the morphology, crystal structure, and photocatalytic activity of the resulting TNTs against diazinon. TNTs synthesis was carried out through a two-stage hydrothermal method using TiO2 micro powder precursors in anatase and rutile phases. The photocatalytic activity of TNTs was tested against diazinon photodegradation. The morphology of TNTs resulting from the first and second hydrothermal processes was fiber-shaped for anatase TNP precursor (TNPa) and rutile TNP precursor (TNPr). TEM characterization showed that the TNT particles were tubular with an outer diameter of 2.27-10.92 nm and an inner diameter of 1.10-4.2 nm. Some impurities, such as sodium titanate and hydrogen titanate, still appear in the diffraction patterns of TNTa and TNTr. The TNTr photocatalyst underwent crystal phase transformation into anatase, which was compared with the JCPDS data. The percentage of degradation for TNTa photocatalyst is slightly greater than TNTr, reaching 85.9% and 82.4%, respectively.
Synthesis of TiO2-Activated Carbon from Coffee Dregs by Hydrothermal Method for Photodegradation of Diazinon Haryati, Tanti; Zakaria, Helmy Ahmad; Sutisna, Sutisna; Suwardiyanto, Suwardiyanto; Sulistiyo, Yudi Aris; Andarini, Novita
Molekul Vol 20 No 1 (2025)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2025.20.1.13714

Abstract

ABSTRACT. The photocatalytic activity of TiO₂ can be enhanced by binding it to materials with high adsorption capacity. The synthesis began with the mixture of 5 mL TTIP, 30 mL ethanol, and H₂O 30 mL stirred for 1 hour. Activated carbon made from coffee grounds in varying amounts (5 g, 10 g, and 15 g) was then added to the TTIP solution, and the mixture was stirred for 2 hours. The mixture was then placed in an autoclave, heated at 180°C for 12 hours, dried, and then calcined at 500°C for 3 hours. SEM morphological analysis showed that TiO₂ particles were attached to the surface of the activated carbon, which was further confirmed by EDX data showing the presence of Ti and O elements in the synthesized material. Furthermore, crystallinity and gap analyses demonstrated that the material was exclusively in the anatase phase. The largest surface area, 286.10 m²/g, was observed on titanium dioxide-activated carbon/10 (TiO₂-AC/10), exhibiting a mesoporous structure and microporous features. Photocatalytic tests for diazinon degradation demonstrated that TiO₂-AC/10 exhibited the most significant photocatalytic activity of 65.18%. The composite material's degradation capability diminished by 9-13% from the initial to the third cycle. The residual titanium elements within the composite material maintained stability, suggesting the integrity and durability of TiO₂ particles affixed to the surface of activated carbon. Keywords: TiO2-AC, Coffee Dregs, Diazinon, Photocatalysis, Reusability
Extraction of Aluminium (Al) Metal from Coal Fly Ash of PLTU-Paiton with NaOH Solvent Puspa, Aranca Nindya; Haryati, Tanti; Andarini, Novita
Indonesian Chimica Letters Vol. 2 No. 2 (2023)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v2i2.5616

Abstract

Fly ash, a solid waste product from the coal combustion process at the Paiton PLTU, contains 14.52-23.78% alumina (Al2O3). This can be extracted using NaOH for further utilization. The Al(OH)3 precipitate was obtained using a 4 M HCl solution with pH variations of 6 and 6.5. Meanwhile, Al metal was obtained using a reduction temperature variation of 600-700°C with an interval of 50°C using Mg metal reductant for 2.5 hours. The aluminum metal obtained was subjected to qualitative analysis by UV-Vis spectrophotometer and quantitative analysis by XRF and AAS. The Al(OH)3 precipitate obtained at a pH of 6.001 weighed 1.581 grams, with a yield of 61.83%, while at a pH of 6.500 it weighed 1.688 grams, with a yield of 66.02%. Applying a specific reagent for Al metal, alizarin, to qualitative analysis resulted in a maximum wavelength of 495 nm. A quantitative analysis was conducted utilizing the atomic absorption spectrophotometer (AAS) at a wavelength of 309.3 nm. The alumina content in fly ash was determined to be 14.52%, with an Al metal yield of 8.67% at a pH of 6 and 9.01% at a pH of 6.5, at an optimal reduction temperature of 650°C.
One-Step Hydrothermal Synthesis of TiO2 Nanotubes and Photodegradation Activity towards Diazinon Haryati, Tanti; Diana, Alvina Nur; Sofiyah, Ovy; Nelumbium, Tusiana Putri; Andarini, Novita; Sulistiyo, Yudi Aris; Suwardiyanto, Suwardiyanto
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 4 Year 2023 (December 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20056

Abstract

The study aimed to analyze how variations in TiO2/NaOH mole ratio, stirring time, and washing pH affect the formation process of TiO2 nanotubes (TNT) through one-stage hydrothermal. TiO2 micro powder was mixed with 10M NaOH with the variation of TiO2/NaOH mole ratio (0.005:1, 0.015:1, and 0.025:1). The hydrothermal process was then conducted at 130 ℃ in an autoclave for 24 h with stirring time intervals of 10, 15, and 20 minutes/h. The samples underwent 1 M HCl washing to produce diverse pH variations (pH = 2, pH = 3, and pH = 4). Characterization of the synthesized TNT was conducted using SEM, TEM, XRD, SAA, and UV-Vis DRS. After analysis of the micrographs revealed the fiber shape of the particles, it was noted that TNT particle size increased due to smaller mole ratio variation, longer stirring, and lower pH. The synthesized TNT featured a tubular morphology with an inner diameter of 3.30 nm, an outer diameter of 6.15 nm, and a wall thickness of 1.64 nm. The increase in sodium titanate content of the sample results in an increase in surface area. Additionally, small pore size contributes towards an increase in both surface area and total pore size. The best result of the TNT photocatalytic test against diazinon can be observed in the fifth sample with a mole ratio of 0.025:1, stirring time of 20 minutes/h, and washing pH of 3. With an irradiation time of 210 min, diazinon degradation reached 90%. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Optimization of Cyanidation Parameters in the Merrill-Crowe Method for Copper Recovery from Electroplating Wastewater Afrianti, Lia; Haryati, Tanti; Mintadi, Mukh; Asnawati, Asnawati; Oktavianawati, Ika; Andarini, Novita; Sulistiyo, Yudi Aris; Suwardiyanto, Suwardiyanto
Indonesian Chimica Letters Vol. 5 No. 1 (2026)
Publisher : Department of Chemistry, FMIPA, UNEJ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v5i1.60006

Abstract

Electroplating wastewater contains heavy metals (copper, chromium, zinc, and nickel) at concentrations that frequently exceed safe discharge limits, posing serious risks to aquatic ecosystems. This study examines whether the Merrill–Crowe process, conventionally used for gold and silver recovery, can be adapted to recover copper from industrial electroplating effluent. The wastewater tested carried an initial copper concentration of 235.7 ppm. Cyanidation conditions were optimized by varying pH (7-11) and contact time (5-25 hours) to generate copper–cyanide complexes, which were subsequently precipitated with zinc powder. Complex formation was monitored by UV-Vis spectrophotometry; copper concentrations were quantified by atomic absorption spectrophotometry. Optimal conditions were pH 8 and 20 hours of contact time. Under these parameters, copper recovery reached 58.5% from electroplating wastewater and 43.5% from a standard reference solution. The higher efficiency in the wastewater sample reflects the presence of pre-formed copper–cyanide complexes, which accelerated both cyanidation and cementation. These results suggest the Merrill–Crowe process is a viable, low-complexity recovery strategy, one that not only reduces copper discharge but returns it in elemental form with potential economic value.
The Effect of Sol-Gel Temperature and Solvent Polyethylene Glycol (PEG) in ZnO-TiO2 Photocatalyst Activity as Degrader of Textile Dyeing Liquid Waste Tanti Haryati; Novita Andarini; Siti Mardhiyah
ALCHEMY Jurnal Penelitian Kimia Vol 10, No 2 (2014): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.10.2.536.149-156

Abstract

The use of TiO2  powder  as photocatalyst still provides some disadvantages such as the difficulties in regenerate ion, the low adsorption and turbulence . These problems can be overcomed by providing the photocatalyst as a composite of ZnO-TiO2. This research aims to  investigate  the  effect  of  composition  of  solvent  and  temperatureof  synthesis  on  the quality  and  photocatalytic  activity  of  ZnO-TiO2  which  was  prepared  by  sol-gel  method. The  photocatalytic  activity  was  determined  by  applying  the  composite  in  degradation  of Procion  Red  MX-8B  under  irradition  of  UV  light  for  24  hours.  The  procion  red concentration after degradation was determined by UV-Vis spectrophotometer. Meanwhile the effect of synt hesis temperature on crystal structure  of composite  was studied by XRD. The results show that the composite which was prepared by PEG 1500 at 1:4 of moles ratio and at 70  °C of  synthesis temperature has  highest degradation  percentage,  i.e. 55.375 % and photocataltic activity of 3.561 x 10-7mg/cm2s.
Co-Authors Afrianti, Lia Asnawati Asnawati Asnawati Asnawati Assiddiq, Mustafid A’yun Bambang Piluarto Busroni, Busroni Denny Trias Utomo, Denny Trias Dewi, Widya Puspita Diana, Alvina Nur Donatus Setiawan Purwo Handoko Dwi Indarti Furqonul Hakin Al Hadi Ika Oktavianawati Kamila, Wilda Lutfia, Zuhrotul Maimunah Noer Aini Maziyyah, Deys Sya’fatul Mellisa Ika Febrianti Mintadi, Mukh Nelumbium, Tusiana Putri NUR FITRIYAH Nursiah Nursiah, Nursiah Nursiah, N. Purwo Handoko, Donatus Setyawan Puspa, Aranca Nindya Ramadhani, Ferlia Suci Ratno Budiyanto Resty Rukmi Kharismaningrum Ria Sherly Farida Rika Yulianti, Rika Roziqin, Achmad Zainur Sholehah, Hidayati Nur Mohammad SISWOYO Siti Mardhiyah Siti Mardhiyah Sofiyah, Ovy Sunnardianto, Gagus Ketut Sutisna Sutisna Suwardiyanto Suwardiyanto Suwardiyanto Suwardiyanto, S. Syamsiar, Syamsiar Tanti Haryati Tri Mulyono Vici Saka Dirgantara, Vici Saka Wuryanti Handayani Yeni Maulidah Muflihah Yeni Maulidah Muflihah Yudi Aris Sulistiyo, Yudi Aris Yudi Aris Sulistyo Yusril Ihza Mahendra Zakaria, Helmy Ahmad Zulaicha, Siti Zulfikar