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All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar BERKALA SAINSTEK Alchemy Jurnal Penelitian Kimia UNEJ e-Proceeding ALCHEMY Jurnal Penelitian Kimia Indonesian Chimica Letters Molekul: Jurnal Ilmiah Kimia InSTEM Bulletin of Chemical Reaction Engineering & Catalysis
Tanti Haryati
Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Jember
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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Improvement of Acid-Base Materials Understanding SMAI Gumukmas Students with Simple Practicum Haryati, Tanti; Zulfikar, Zulfikar; Indarti, Dwi
Jurnal Inovasi Sains dan Teknologi untuk Masyarakat Vol. 1 No. 2 (2023): November
Publisher : Faculty of Mathematics and Natural Sciences, University of Jember. Jl. Kalimantan No.37, Krajan Timur, Jemberlor, Kec. Sumbersari, Jember Regency, East Java 68121

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/instem.v1i2.465

Abstract

SMAI Gumukmas is a privately-funded high school situated in Purwoasri Village, Gumukmas District, Jember, with a B accreditation status. The absence of laboratory resources challenges devising inventive, uncomplicated, and pragmatic classroom learning, such as Chemistry. Collaboration between SMAI Gumukmas and the Chemistry Department lecturers to conduct community service is a mutually beneficial initiative that fosters curriculum innovation and practicum subjects. Acid-base is a chemistry topic with material relevant to all grade levels and can be easily visualized through practical examples from everyday life. The methodology involves delivering a lecture or theoretical framework on acid-base, followed by practical work. The acid-base practical is designed to commence with comprehension of the acid-base concept, including everyday life examples, before progressing to classroom implementation. The acid-base theme learning activities and practicum at SMAI Gumukmas proceeded seamlessly and successfully. The initial class consisted of 40 students from grades 11 and 12, while the subsequent consisted of 33 grade 10 students. The students exhibited a positive response as their studies progressed with exemplifications derived from everyday life.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (514.618 KB) | DOI: 10.19184/icl.v1i1.5

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (716.495 KB) | DOI: 10.19184/icl.v1i2.205

Abstract

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.
Hydrothermal Synthesis of Hematite (α-Fe2O3) from Indonesia Iron Sand Furqonul Hakin Al Hadi; Tanti Haryati; Novita Andarini; Suwardiyanto; Sulistiyo, Yudi Aris
Indonesian Chimica Letters Vol. 2 No. 1 (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.v2i1.367

Abstract

High potency of Indonesian iron sand can be optimized by transforming to valuable iron oxide product namely Hematite (α-Fe2O3). Hydrothermal synthesis was carried out to transform iron oxide phase to hematite that can be analyzed by x-ray diffraction method. Utilization of ion sand as raw material produced multyphase in product reaction, while  the usage of Fe(OH)x that extracted from iron sand attained high purity of hematite. The best conditions of reaction were at 160 oC for 24 h. Higher temperature and longer time reaction transformed α- α-Fe2O3 to be γ-Al2O3 and Fe3O4 as more stable phase.
Synthesis and Characterisation of Bentonite/Poly(Acrylic Acid) Hybrid Material for Its Application as A Catalyst in Esterification of Glycerol with Acetic Acid Sholehah, Hidayati Nur Mohammad; Suwardiyanto; Tanti Haryati; Novita Andarini; Sulistiyo, Yudi Aris
Indonesian Chimica Letters Vol. 3 No. 1 (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.v3i1.798

Abstract

Bentonite/poly(acrylic acid) (BTAA) hybrid material commonly applied as superabsorbent was prepared via intercalation method coupled with in situ polymerisation of partially neutralised acrylic acid monomers. The structural characteristics of various BTAA ratios and their constituents were scrutinised using XRF, XRD, and FTIR. Basal spacing of BTAA hybrid materials decreased as a result of intercalation with polyacrylic acid. Interaction between bentonite and polyacrylic acid was also observed in the shifting and reduced intensity of O–H, C=O, and Si–O–Al absorption bands. Catalytic activity of BTAA was investigated through its ability to facilitate the esterification reaction of glycerol with acetic acid. The result suggests that catalytic activity is present in BTAA hybrid materials, as evidenced by the production of monoacetin and triacetin.
Synthesis of Zeolite A From Coal Fly Ash with Variation of Si/Al Molar Ratio Andarini, Novita; Haryati, Tanti; Lutfia, Zuhrotul
Jurnal ILMU DASAR Vol 19 No 2 (2018)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.921 KB) | DOI: 10.19184/jid.v19i2.5910

Abstract

Fly ash containing 30-36% silica and 14,52-23,78% alumina can be potentially as raw material for synthetic zeolite such as zeolite A. Zeolite A is an aluminosilicate mineral which is rich in alumina so that this zeolite has a good cation exchange capability. Zeolite A has been synthesized by hydrothermal treatment after NaOH fusion. Fly ash has been fused with NaOH at 550 0C for 40 minutes and hydrothermally treated at 1000C for 5 hours. The hydrothermal treatment was conducted in some various Si/Al molar ratios from 0.90; 1.00.; 1.05; to 1.24. The zeolite A was then analyzed using XRD and XRF. The best zeolite A based on XRD result is zeolite with Si/Al molar ratio of 1.1 with crystallinity of 96,80%. The x-ray fluorescence result showed that the Si/Al molar ratios of the four zeolite samples were close to of Si/Al molar ratios of 1, 1.1, 1.21.3 respectively.Keywords: Fly ash, Zeolite A, Hydrothermal Fusion
Synthesis and Characterization Thin Film TiO2 as Degrading Procion Red MX-8B Textile Dye Almu’minin, Achmad Sholikhudin; Haryati, Tanti; Mulyono, Tri
Jurnal ILMU DASAR Vol 17 No 2 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.367 KB) | DOI: 10.19184/jid.v17i2.2685

Abstract

TiO2 photocatalyst is one of type semiconductor that is often used in textile dyes photodegradationmethod which characteristics are influenced by the size of crytal. Synthesis of TiO2 photocatalystscan be done by several methods, one using the sol-gel method. By treating variations in thecomposition of the reactans and treatment of synthesis in sol-gel method, the size of the TiO2crystals can be controlled to produced the desired characteristics. This study has been made ofTiO2 photocatalysts in the form of thin-layer films using sol-gel method with annealing process ata temperature of 550oC. This study examines the effect of the concentration of precursor TTIP andhydrolysis ratio of the crystal structure, crystallinity, the band gap energy, and photocatalystactivity to degrade procion red mx-8b dye compound. The result obtained is known that the crystalsynthesized has structure of TiO2 anatase. Value crystal size, crystallinity, the band gap energy,and percent degradation has a value that depends on the composition of TTIP concentration andhydrolysis ratio. Although the results showed morphology of TiO2 particle indivcate that large sizeand crystallinity value is still low, but that is interesting each of the measurement results mutuallysupport each other.Keywords: photocatalyst, TiO2, Sol-gel, TTIP concentration, hydrolysis ratio
Variasi Penambahan CTABr Sebagai Template Terhadap Pembentukan TiO2 Anatase Dari Senyawa Natrium Titanat dan Aplikasinya Sebagai Fotokatalis Dewi, Widya Puspita; Haryati, Tanti; Suwardiyanto, Suwardiyanto; Sulistiyo, Yudi Aris; Andarini, Novita
BERKALA SAINSTEK Vol 7 No 2 (2019)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v7i2.12857

Abstract

TiO2 anatase mesopori (ukuran pori 2-50 nm) memiliki aktivitas fotokatalitik yang besar. Metode sintesis kimia padat dapat digunakan sebagai alternatif untuk memperoleh TiO2 anatase dari natrium titanat dengan menggunakan prekursor yang murah berupaTiO2 rutile komersial. Surfaktan CTABr (Cetyltrimethylammonium Bromide) mampu menghasilkan TiO2 anatase mesopori dengan kemampuannya sebagai template atau agen pembentuk pori. Penelitian ini bertujuan mengetahui pengaruh variasi penambahan CTABr terhadap distribusi ukuran pori, volume total pori, luas permukaan TiO2 dan dan aktivitas fotokatalitik TiO2 hasil sintetis. Sintesis dilakukan menggunakan metode reaksi kimia padat dengan penambahan variasi perbandingan mol CTABr dan tanpa penambahan CTABr sebagai pembanding. Karakterisasi menggunakan XRD (X- Ray Powder Difraction), SEM (Scanning Electron Microscopy) dan Gas Sorption Analyer (GSA) untuk mengetahui struktur, morfologi dan sifat pori TiO2. TiO2 anatase mesopori hasil sintesis diaplikasikan sebagai fotokatalis dalam mendegradasi metilen biru. Hasil penelitian ini menunjukkan bahwa TiO2 anatase mesopori berhasil didapatkan dengan morfologi partikelnya berbentuk seperti balok, sisi tidak seragam serta ukuran partikel berkisar 200-500 nm. Variasi penambahan CTABr tidak memberikan pengaruh yang signifikan terhadap distribusi ukuran pori, volume total pori, luas permukaan dan aktivitas fotokatalitik dari TiO2 anatase mesopori, dengan hasil distribusi pori mayoritas pada 2 nm dan aktivitas fotokatalitik sekitar 77%
Isolasi Emas dari Larutan Kompleks Emas Thiourea Hasil Ekstraksi dengan Metode Elektrolisis Nursiah, Nursiah; Haryati, Tanti; Andarini, Novita
BERKALA SAINSTEK Vol 7 No 1 (2019)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v7i1.9684

Abstract

Emas merupakan logam mulia dan memiliki nilai ekonomi yang tinggi. Metode pemisahan emas dari campurannya yang biasa digunakan yaitu amalgamasi dan sianidasi. Metode isolasi alternatif yang dapat digunakan yakni dengan leachingmenggunakan pelarut thiourea dilanjutkan dengan pemisahan kompleks yang terbentuk dengan elektrolisis. Penelitian ini bertujuan untuk menentukan waktu optimum dan luas permukaan katoda optimum menggunakan karbon selama elektrolisis berlangsung. Variasi waktu elektrolisis yang diterapkan sebesar 60; 90; 120; 150; 180; dan 210 detik. Waktu optimum yang diperoleh yaitu pada 150 detik dengan persentase penurunan Au dalam larutan sebesar 98,99% diikuti kenaikan massa katoda sebesar 0,02 mgram. Elektrolisis selanjutnya dilakukan dengan variasi luas permukaan katoda karbon 0,1256; 0,2462; dan 0,5064 cm2 dengan waktu 150 detik. Luas permukaan optimum yang diperoleh pada 0,2462 cm2 dengan hasil penurunan Au dalam larutan sebesar 98,459% dan kenaikan massa katoda 0,020 mgram.
PENGARUH EKSTRAK KASAR TANIN DARI DAUN BELIMBING WULUH (AVERRHOA BILIMBI L.) PADA PENGOLAHAN AIR Kristianto, Aries; Winata, I Nyoman Adi; Haryati, Tanti
BERKALA SAINSTEK Vol 2 No 1 (2014)
Publisher : Universitas Jember

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

Abstract

Penelitian tentang pengaruh ekstrak kasar tanin dari daun belimbing wuluh (Averrhoa bilimbi L.) pada pengolahan air telah dilakukan. Ekstrak kasar tanin diperoleh dengan cara maserasi dengan metanol 50% terhadap serbuk kering daun belimbing wuluh (A. bilimbi L.). Selanjutnya ekstrak kasar tanin dikombinasikan dengan koagulan FeCl3 dan FeSO4. Pada pengolahan air parameter yang diamati adalah pH, kekeruhan, padatan terlarut dan daya hantar listrik. Penambahan ekstrak kasar tanin dengan FeCl3 pada kondisi optimum (125 mg/L tanin dan 50 mg/L FeCl3) dapat menurunkan kekeruhan, pH, padatan terlarut dan daya hantar listrik berturut-turut sebesar 72,43%, 47,24%, 86,13% dan 5,44%. Penambahan ekstrak kasar tanin dengan FeSO4 pada kondisi optimum (150 mg/L tanin dan 60 mg/L FeSO4) dapat menurunkan kekeruhan, pH berturut-turut sebesar 6,98%, 25,20%, padatan terlarut tidak dapat didefinisikan dan daya hantar listrik mengalami kenaikan sebesar 5,81%. Pada penambahan tanin tanpa kombinasi koagulan pada kondisi optimum (125 mg/L) dapat menurunkan kekeruhan sebesar 19,14%, pH mengalami kenaikan sebesar 19,33%, dan menurunkan padatan terlarut dan konduktivitas berturut-turut sebesar 69,33% dan 2,70%. Kata kunci: Averrhoa bilimbi L., koagolan, tanin.
Co-Authors AA Sudharmawan, AA Agus Wedi Pratama Almu’minin, Achmad Sholikhudin Assiddiq, Mustafid A’yun Bambang Piluharto D. C, Hermawan Dewi, Widya Puspita Diana, Alvina Nur Dwi Indarti E., Supriyanto. Fachry Abda El Rahman Furqonul Hakin Al Hadi HARDIAN SUSILO ADDY I Nyoman Adi Winata Ika Oktavianawati Imam Syafi’i Kamila, Wilda Kiki Puji Setianingrum Lutfia, Zuhrotul Maziyyah, Deys Sya’fatul Mellisa Ika Febrianti Nasution, Annio Indah Lestari Nelumbium, Tusiana Putri Novita Andarini Novita Andarini Nursiah Nursiah, Nursiah Nursiah, N. Puspa, Aranca Nindya R. Indahsari Ramadhani, Ferlia Suci Ria Sherly Farida Rika Yulianti, Rika Roziqin, Achmad Zainur Sholehah, Hidayati Nur Mohammad Siswoyo Siswoyo Siti Mardhiyah Sofiyah, Ovy Sunnardianto, Gagus Ketut Sutisna Sutisna Suwardiyanto Suwardiyanto Suwardiyanto Suwardiyanto, S. Syamsul Arifin Tri Mulyono Wawan Badrianto Wawan Badrianto, Wawan Yeni Maulidah Muflihah Yudi Aris Sulistiyo, Yudi Aris Zakaria, Helmy Ahmad