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All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar BERKALA SAINSTEK Alchemy Jurnal Penelitian Kimia Jurnal Kimia Riset Indonesian Chimica Letters Molekul: Jurnal Ilmiah Kimia InSTEM Bulletin of Chemical Reaction Engineering & Catalysis

Novita Andarini

Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Jember

Author-ID : 2975902

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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Synthesis of Zeolite Y from Lapindo Mud with the Comparative Variation of the Weight of NaOH/Mud and Molar SiO2/Al2O3 Andarini, Novita; Haryati, Tanti; Suwardiyanto, Suwardiyanto; Sulistiyo, Yudi Aris
Indonesian Chimica Letters Vol. 1 No. 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Lapindo mud is a waste that can be used as a zeolite formation material. Zeolite is a mineral there are silica and alumina. The zeolite synthesized was the zeolite Y. The synthesis of zeolite Y is carried out the melting method followed by hydrothermal process. The ratio of NaOH/sludge weight varied the weight of NaOH added to the sludge weight which was made constant, there were 1.1 gram of NaOH/1 gram of sludge; 1.3 gram of NaOH/1 gram of sludge; 1.5 gram of NaOH/1 gram of sludge; and 1.7 gram of NaOH/ 1 gram of sludge. The sludge was pretreated using HCl in the leaching process and NaOH for smelting. The melted sludge from the four variations was characterized using XRF. The results of characterization are used as the basis for determining the mass of SiO2 and NaOH that need to be added in the synthesis. The melted sludge was added with water, SiO2, and NaOH and cured for 48 hours at room temperature. The mixture that has been brooded is then filtered, the result of the filtering is the filtrate of sodium silicate and sodium aluminate solution. The filtrate was hydrothermal 100-105 °C for 24 hours. The resulting crystals were filtered and neutralized using aquademine. The resulting synthetic zeolite was white, then characterization was carried out using XRF and XRD. The characterization results on the variation of NaOH/sludge weight ratio could be seen from the XRF results. Zeolite Y varies the weight ratio of NaOH/sludge based on the character of the best zeolite produced at a weight ratio of NaOH/sludge 1.5.

Solid State Transformation of TiO2 Rutile and its Photocatalytic Activity Sulistiyo, Yudi Aris; Kamila, Wilda; Andarini, Novita; Suwardiyanto, Suwardiyanto; Sunnardianto, Gagus Ketut; Haryati, Tanti
Indonesian Chimica Letters Vol. 1 No. 2 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Transformation phase TiO2 Rutile was conducted to improve the photocatalytic activity. This study evaluated the transformation phase of TiO2 rutil using solid state rection method and tested for gycerol conversion reaction. a semiconductor material that can be applied for glycerol conversion. The solid state reaction using a mixture of TiO2 Rutile and sodium titanate in mole rasio 1:4 that was heated in 750 oC. XRD analysis evaluated the transformation phase of the solid state reaction product, while band gap energi was calculated following UV-Vis diffuse reflectance data. The photoactivity of glycerol was exposed by UV-Light in various time (5, 10, 15 h) that of the liquid product was analyzed by gas chromatography. Solid state reaction transformed TiO2 rutil to polymorph structure (TiO2 rutile, TiO2 anatase, and sodium titanate Na4O12Ti5). The band gap energy of the product was 3.2 eV. The optimum photocatalytic activity was 62.7% in glycerol concentration 0.25 M for 15 h time reaction.

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

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%.

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

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.

Co-Authors Asnawati Asnawati Asnawati Assiddiq, Mustafid A’yun Bambang Piluarto Denny Trias Utomo, Denny Trias Dewi, Widya Puspita Diana, Alvina Nur Dwi Indarti Kamila, Wilda Lutfia, Zuhrotul Maziyyah, Deys Sya’fatul Mellisa Ika Febrianti Nelumbium, Tusiana Putri 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 Siti Mardhiyah Sofiyah, Ovy Sunnardianto, Gagus Ketut Sutisna Sutisna Suwardiyanto Suwardiyanto Suwardiyanto Suwardiyanto, S. Tanti Haryati Vici Saka Dirgantara, Vici Saka Wuryanti Handayani Yeni Maulidah Muflihah Yudi Aris Sulistiyo, Yudi Aris Yusril Ihza Mahendra Zakaria, Helmy Ahmad Zulaicha, Siti Zulfikar Zulfikar

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