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

Tanti Haryati

Unknown Affiliation

Author-ID : 277496

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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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 : My Home

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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.

Dye-Sensitized Solar Cells (Dssc) Using Natural Dyes Extracted From Red Cabbage And Counter Electrode Based Tio2-Graphite Composites Haryati, Tanti; Mulyono, Tri; Oktavianawati, Ika; Badrianto, Wawan
UNEJ e-Proceeding Indonesian Protein Society (IPS), International Seminar and Workshop 2014
Publisher : UNEJ e-Proceeding

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Dye sensitized solar cells (DSSC) has been a popular research topic which benefits in high energy conversion efficiency and less cost in fabrication process. The components of DSSC consist of photoanode, electrolyte, and counter electrode that are arranged as sandwich. The photoanode contains ITO (indium tin oxide) glass covered by TiO2 particles, while the counter electrode contains ITO glass covered by composite of TiO2-graphite as counter electrode and red cabbage extract, as a dye agent. The cell was fabricated in various amount of graphite, i.e 10%; 30%; and 50 %, and time of soaking i.e 2; 13; 24; and 48 hours. The performance of the solar cell per active area of ââ1 cm2 was tested on irradiation of 75 Watt halogen lamp (distance 15 cm) and measured by multimeter and rheostat. The optimum synthesis condition of DSSC was obtained with composition of TiO2:graphite on the counter electrode is 70%:30 %, and soaking time in dye agent is for 24 hours. This cell results in an optimum performance, Isc = 0.028 mA ;Voc = 0.344 mV, FF = 0.29 and = 0.0055 % efficiency. Keywords: DSSC, Red Cabbage, Counter Electrode

Isolasi Emas dari Larutan Kompleks Emas Thiourea Hasil Ekstraksi dengan Metode Elektrolisis Nursiah, N.; 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.v7i1.9917

Emas merupakan logam mulia dan memiliki nilai ekonomi yang tinggi. Metode pemisahan emas dari campurannya yang biasa digunakan yaitu amalgamasi dan sianidasi, namun keduanya menghasilkan limbah yang dapat merugikan lingkungan dan makhluk sekitarnya. Metode isolasi alternatif yang dapat digunakan yakni dengan leaching menggunakan 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. Kata Kunci: elektrolisis, emas, leaching, thiourea.

The Effect of Different Precursor Concentration on The Synthesis of CaO Nanoparticles with Coprecipitation Methods for Palm Oil Transesterification Catalysis Novita Andarini; Ria Sherly Farida; Tanti Haryati
Reaktor Volume 21 No. 2 June 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Calcium oxide nanoparticles was prepared by coprecipitation method using calcium acetate as precursor and calcined at 800 °C for 6 hours. This work studied the effect of different precursor concentrations on the size of calcium oxide obtained and its applicated for palm oil transesterification catalysis. Characteristics of samples were measured by XRD and SEM et al techniques. The results showed that the diffraction pattern of CaO has the same diffraction pattern as the XRD standard diffraction pattern from the Joint Committee on Powder Diffraction Standard (JCPDS). Calcium oxide analysis using SEM shows the morphology of particles that agglomerate almost all variations in precursor concentration. The particle size increases with increasing precursor concentration. The smallest particle size of 55.758 nm was produced on solid CaO from the lowest precursor concentration of 0.05 M. The catalytic activity of activated calcium oxide nanoparticle compound was tested in the production of methyl esters. The conversion of triglycerides in palm oil into methyl esters was 90.34%.Keywords: nanoparticles, calcium oxide, coprecipitation, precursor, catalys, metyl ester

Dye-Sensitized Solar Cells (Dssc) Using Natural Dyes Extracted From Red Cabbage And Counter Electrode Based Tio2-Graphite Composites Tanti Haryati; Tri Mulyono; Ika Oktavianawati; Wawan Badrianto
UNEJ e-Proceeding Indonesian Protein Society (IPS), International Seminar and Workshop 2014
Publisher : UPT Penerbitan Universitas Jember

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

Dye sensitized solar cells (DSSC) has been a popular research topic which benefits in high energy conversion efficiency and less cost in fabrication process. The components of DSSC consist of photoanode, electrolyte, and counter electrode that are arranged as sandwich. The photoanode contains ITO (indium tin oxide) glass covered by TiO2 particles, while the counter electrode contains ITO glass covered by composite of TiO2-graphite as counter electrode and red cabbage extract, as a dye agent. The cell was fabricated in various amount of graphite, i.e 10%; 30%; and 50 %, and time of soaking i.e 2; 13; 24; and 48 hours. The performance of the solar cell per active area of 1 cm2 was tested on irradiation of 75 Watt halogen lamp (distance 15 cm) and measured by multimeter and rheostat. The optimum synthesis condition of DSSC was obtained with composition of TiO2:graphite on the counter electrode is 70%:30 %, and soaking time in dye agent is for 24 hours. This cell results in an optimum performance, Isc = 0.028 mA ;Voc = 0.344 mV, FF = 0.29 and = 0.0055 % efficiency. Keywords: DSSC, Red Cabbage, Counter Electrode

CHARACTERIZATION OF SULFONATED POLYSULFONE/BENTONITE HYBRID MEMBRANES Bambang Piluharto; Imam Syafi’i; R. Indahsari; Tanti Haryati
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Sulfonated polysulfone membrane is one of the alternative membranes as replacing Nafion membrane for the fuel cell application. This membrane was prepared by introducing sulfonic group in the polysulfone structure backbone, so that provides the ionic membrane. However, more ionic groups in the SPSF membrane lead to loss mechanical stability. This study aims to prepare the hybrid membrane from SPSF and bentonite. In here, various of bentonite concentrations were used as variable to study water uptake and ion-exchange capacity properties. As the results, increasing bentonite concentrations lead to increase water uptake and ion-exchange capacity. By the functional group analysis, proved that adding bentonite in SPSF did not change structure of SPSF, means that interaction between SPSF and bentonite were physical interactions.

SYNTHESIS THIN LAYER ZnO-TiO2 PHOTOCATALYSTS SOL GEL METHOD BY USING THE PEG (Polyethylene Glycol) AS SOLVENT Tanti Haryati; Novita Andarini; Mellisa Ika Febrianti
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

The incorporation of TiO and ZnO material as a composite, to increase the activity of the catalyst. Synthesis of ZnO-TiO2 thin layer made using a sol-gel method with a variation of PEG as a solvent. The purpose of this research was to investigate the structure and morphology of ZnO-TiO2 thin layer on the variation of PEG as a solvent by sol-gel method . Preparation of ZnO sol of the precursor , while the TiO2 sol synthesized by dissolving the anatase TiO2 structure into polyethilen glycol . Sol of ZnO and TiO2 sol do sol mixing to form ZnO–TiO2 after it coated on a glass substrate and then calcined . Products were then characterized by X-ray diffraction to determine the crystal structure and SEM to determine its morphology . The test results show the crystal structure by XRD based difaktogram intensity , the greater the molecular weight of the PEG peak intensity of ZnO-TiO2 showed the lower. While based on morphological examination , it can be seen that the larger molecular weight PEG , ZnO - TiO2 granular greater.

FLOW INJECTION POTENTIOMETRIC ANALYSIS OF ASPARTIC ACID, GLUTAMIC ACID AND ASCORBIC ACID USING PLATINUM ELECTRODES Yeni Maulidah Muflihah; Siswoyo Siswoyo; Tanti Haryati; Kiki Puji Setianingrum
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

The presence of weak acids in solution can be detected using a potentiometric detector. Platinum was used as a working electrode and Ag/AgCl as a reference electrode. Ascorbic, glutamic and aspartic acid were detected by a platinum electrode in a flow potentiometric system. The influence of pH, flow rate and concentration of phosphate buffers asa a carrier were studied and showed an optimum pH for the detection of ascorbic and glutamic acid at pH 6,5 and pH 7,0 for aspartic acid. Phosphate buffer concentration optimum at 1x10-4M and flow rate of 1,00 mL/min. Linear range for ascorbic and glutamic acid at 2,5 x10-4M to 5x10-2M, with a regression coefficient of 0,974 and 0,958, while for aspartic acid 5x10-4M to 5x10-2M with a regression coefficient 0,911. Detection limit for ascorbic and glutamic acids were 5x10-4M and 1x10-3M for aspartic acid. Sensor reproducibility obtained from variation coefficient (Kv). Variation coeffiecient (Kv) of ascorbic acids 1,32-1,69%, glutamic acids 0,69- 1,57% and aspartic acid 0,54- 1,29%.

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

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

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.

Co-Authors AA Sudharmawan, AA Afrianti, Lia Agus Wedi Pratama Almu’minin, Achmad Sholikhudin Asnawati Asnawati 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 Mintadi, Mukh Nasution, Annio Indah Lestari Nelumbium, Tusiana Putri 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 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

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