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All Journal Jurnal Ilmu Dasar Journal of Indonesian Tourism and Development Studies Jurnal Ilmu Kimia Universitas Brawijaya Bioedukasi: Jurnal Pendidikan Biologi Journal of Innovation and Applied Technology Journal of Environmental Engineering and Sustainable Technology Natural B The Journal of Pure and Applied Chemistry Research JURNAL INTEGRASI PROSES Bio Ilmi: Jurnal Pendidikan Chemistry in Education Science and Technology Indonesia DIDAKTIKA BIOLOGI: Jurnal Penelitian Pendidikan Biologi Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Diklabio: Jurnal Pendidikan dan Pembelajaran Biologi CARADDE: Jurnal Pengabdian Kepada Masyarakat International Journal of Community Service Learning Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Molekul: Jurnal Ilmiah Kimia JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) English Focus: Journal of English Language Education Cakrawala: Jurnal Pendidikan Tri Dharma Mandiri: Diseminasi dan Hilirisasi Riset Kepada Masyarakat (Jurnal Pengabdian Kepada Masyarakat) International Journal of Social Science, Education, Communication and Economics PKM Linggau: Jurnal Pengabdian dan Pemberdayaan Masyarakat Proceeding Seminar Nasional IPA Riwayat: Educational Journal of History and Humanities International Journal of Renewable Energy Development Biodik: Jurnal Ilmiah Pendidikan Biologi Didaktika Biologi: Jurnal Penelitian Pendidikan Biologi JP2N: Jurnal Pengembangan Dan Pengabdian Nusantara

Sri Wardhani

Universitas Brawijaya

Author-ID : 412795

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Interpersonal, Inkuiri Terbimbin EFEKTIFITAS MEDIA CHEMGAME BERINTEGRASI INKUIRI TERBIMBING UNTUK MENINGKATKAN KEMAMPUAN INTERPERSONAL Sambodo, Agung Dono; Wardhani, Sri; Sunarto, Wisnu
Chemistry in Education Vol 7 No 2 (2018): Terbit bulan Oktober 2018
Publisher : Universitas Negeri Semarang

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

ABSTRAK Penelitian ini bertujuan untuk mengetahui efektifitas media chemgame dalam materi redoks pada pembelajaran kimia dan meningkatkan kemampuan interpersonal siswa. Lokasi penelitian di salah satu SMA kota Semarang, motode penelitian adalah pengembangan kuantitatif, pengumpulan data diakukan dengan lembar observasi, angket tanggapan, penilaian antar teman dan soal pretest-posttest. Hasil penelitian menunjukan bahwa terdapat tanggapan positif siswa terhadap media chemgame yang ditunjukan dengan rata-rata skor tanggapan sebesar 89,91 yang termasuk dalam kriteria sangat tinggi, penilaian antar teman menunjukan rata-rata skor 18 yang termasuk dalam kriteria sangat tinggi, nilai n-gain kemampuan interpersonal didapatkan skor sebesar 0,7845 yang termasuk dalam kriteria sangat tinggi dengan ketuntasan klasikal siswa sebesar 81,85% dengan hal ini menunjukan bahwa media chemgame layak untuk digunakan dan efektif meningkatkan kemampuan interpersonal siswa, sehingga siswa memiliki minat belajar yang tinggi

STUDY EFFECT OF ADDING ZEOLITE AND BANANA STEM ON THE QUALITY OF ORGANIC FERTILIZER FROM CHICKEN MANURE sri wardhani; Darjito Darjito; Nurul Indahsari
Journal of Innovation and Applied Technology Vol 2, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Brawijaya

The purpose of this study was to determine the character of a zeolite, knowing the ratio of the addition of zeolites and zeolite activation on levels of N from organic fertilizers, determine the effect of banana stems against K content of manure and know the quality of the organic fertilizer produced. Research has been done that is activated zeolite with HCl 0.4 m. Natural zeolites and activated zeolite characterization has been done using XRF, AAS and SAA. Organic fertilizer production is done by adding the zeolite and the banana stems in 500 grams of chicken manure with the addition of zeolite variation by 5, 10, 15, 20 and 25 grams. The addition of banana stem variations of 100, 150, 200 and 250 grams. Organic fertilizer analysis contains N, P, and K. The results showed that the zeolite contains elements Si, Al, Ca and Fe. AAS results showed that the zeolites contain elements K of 0.258% and 0.405% respectively for natural zeolites and zeolite activation. SAA results showed that the zeolite is a mesoporous material with a surface area, pore diameter and volume respectively was 244.2 m2 / g, 6.008 nm, 0.099 mL / g for natural zeolites and zeolite activation was 251.7 m2 / g, 6.046 nm and 0,088mL / g. The addition of zeolite can increase the levels of N fertilizer. The addition of zeolite activation in the manufacture of manure increases the levels of N and K but lower levels of P. The addition of a banana tree in the manufacture of organic fertilizer can increase the levels of N, P and K fertilizer. Increasing the ratio of banana stems not affect the K value of manure produced. Quality of the manure generated from livestock manure to 500 grams, 250 grams and 25 grams of banana stem zeolite activation had higher levels of N 4.90%, 1.08% P2O5, K2O 0.62%, 9.31% water content, organic-C 33.48% and C / N ratio of 6.83%.

AKTIVITAS FOTOKATALITIK BEADS TiO2-N/ZEOLIT-KITOSAN PADA FOTODEGRADASI METILEN BIRU (KAJIAN PENGEMBANAN, SUMBER SINAR DAN LAMA PENYINARAN) Sri Wardhani; Akhmad Bahari; Muhammad Misbah Khunur
Journal of Environmental Engineering and Sustainable Technology Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Photodegradation is the decomposition of the compound semiconductor with light. This study aims to determine the photocatalytic activity of TiO2-N / zeolite-chitosan granules by studying the effect of TiO2-N impregnation on zeolites, light source, and the effect of exposure time on the photodegradation of Methylene Blue (MB). Zeolites are activated with HCl 0.4 M. TiO2-N synthesized by the method of sonication with urea as N source, then TiO2-N impregnated into the zeolite. Beads photocatalyst TiO2-N/zeolite-chitosan synthesized by mixing chitosan / acetic acid with a photocatalyst then dripped by syringe pump into 0.4 M NaOH to form granules. The energy band gap of the photocatalyst was determined by Reflactance Diffuse Spectroscopy (DRS). Beads photocatalyst TiO2-N/zeolite-chitosan tested their activity by adding 0,1g beads photocatalyst TiO2-N/zeolite-chitosan with 25 mL MB 20 mg / L and irradiated with sunlight/UV for 1-5 hours. The characterization results DRS beads photocatalyst TiO2-N/zeolite-chitosan has an energy band gap of 2.4 eV. The results showed that impregnation on zeolites can increase photodegradation MB. Light source also affects the catalytic activity of TiO2-N / zeolite-chitosan beads, sunlight provides greater activity than UV rays. The longer the exposure to the sun for up to 5 hours, TiO2-N/zeolite-chitosan granules can degrade MB amounted to 55.08%.Keywords: beads, TiO2-N, Methylene Blue, zeolite, chitosan.

The Effect of Phosphatation and Granulation Zeolite in the Adsorption of Cr(VI) Sri Wardhani; Reno Sunarinda Endrayana; Danar Purwonugroho
The Journal of Pure and Applied Chemistry Research Vol 6, No 3 (2017): Edition of September - December 2017
Publisher : Chemistry Department, The University of Brawijaya

The purpose of this research to study effect of contact time on adsorption of Cr(VI) ion using Granules Alumino Silico Phosphate (GASP) and the effect of Cr (VI) concentration on adsorption capacity at GASP. The GASF synthesis process is carried out in several main stages: 1) activation of zeolite with addition of HCl, 2) zeolite phosphatation with addition of NH4H2PO4 ratio Si/P = 1/6 at 235ᴼC for 5 hours, 3) how make GASP with addition of zeolite phosphate (Alumino Silicone Phosphate) and chitosan gel with a syringe pump speed of 50 mL/min. GASP is characterized using XRF, FT-IR and SAA. The contact time effect is tested using 0.1 g of GASF in K2CrO4 100 mg/L with a contact time variation of 0.5; 1.0; 1.5; 2.0 and 2.5 hours. The concentration effect on adsorption capacity is tested out using 0.1 g of GASP in K2CrO4 with concentration variation 25, 50, 75, 100 and 150 mg / L for 2 hours (optimum contact time). The adsorption capacity can be determined using the Langmuir equation. XRF characterization results showed a decrease in SiO2 levels of 18.10% and Al2O3 by 2.2% after phosphatation process. FTIR characterization results indicate the presence of O-H, N-H and C-H chitosan on absorption bands 1-3. The success of the phosphatation process was evidenced by the shift of wave numbers to the lower regions in the bands 7, 9 and 12 the absorption of tetrahedral silica and alumina shifted to bands 8, 10 and 13 tetrahedral phosphate uptake in accordance with Hooke's law. The result of the research showed that the optimum contact time occurred in the adsorption process for 2 hours. The concentration variation was directly proportional to the increase of the adsorbed Cr (VI) ion mass. The presence of phosphatation and chitosan addition process can increase the value of adsorption capacity by 48,077 mg / g.

Ozone Determination: A Comparison of Quantitative Analysis Methods Rachmat Triandi Tjahjanto; Dhesy Galuh R.; Sri Wardhani
The Journal of Pure and Applied Chemistry Research Vol 1, No 1 (2012)
Publisher : Chemistry Department, The University of Brawijaya

A comparison of ozone quantitative analysis methods by using spectrophotometric and volumetric method has been studied. The aim of this research is to determine the better method by considering the effect of reagent concentration and volume on the measured ozone concentration. Ozone which was analyzed in this research was synthesized from air, then it is used to ozonize methyl orange and potassium iodide solutions at different concentration and volume. Ozonation was held for 20 minutes with 363 mL/minutes air flow rates. The concentrations of ozonized methyl orange and potassium iodide solutions was analyzed by spectrophotometric and volumetric method, respectively. The result of this research shows that concentration and volume of reagent having an effect on the measured ozone concentration. Based on the results of both methods, it can be concluded that volumetric method is better than spectrophotometric method.

The Effect of Acidity and Aging Time in The Synthesis of Al(OH)3 from The Anodized-waste with a Sol-Gel Method Sri Wardhani; Danar Purwonugroho; Deka Permatasari; Darjito Darjito
The Journal of Pure and Applied Chemistry Research Vol 8, No 3 (2019): Edition September-December 2019
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2019.008.03.477

Synthesis of alumina has been carried out by utilizing anodized waste as raw material. Anodized waste is a by-product of metal anodizing processes such as aluminium. This study aims to determine the effect of acidity (pH) and aging time on the mass of Al(OH)3 and the property of Al(OH)3 as well as Al2O3 that produced. Anodized waste was deposited into Al(OH)3 and then purified. Alumina synthesized by the sol-gel method with pH variations of 7, 8, 9, and 10 and aging times of 24, 48, and 72 hours. The Al(OH)3, which has been produced, was characterized by PSA and powder XRD spectrophotometer. The results showed that the synthesis of Al(OH)3 was influenced by pH and aging time. It affects the yield and particle size of Al(OH)3. The optimum condition of the synthesis was pH 7 and aging time of 24 hours with yield of 1.85 grams. Characterization by PSA at a current diameter of 90% indicate that higher pH value and longer aging time produces smaller particle size. Characterization by powder XRD shows that the Al(OH)3 has gibbsite crystal phase with d values of 3.360, 3.217, 2.252, 2.029, and 1.649 Å.

NPK Fertilizer With Slow Release Fly Ash Nadhira Izzatur Silmi; Fidela Azaria Antasari; Della Afriyana; Ridha Dini Rahmawati; Ilham Sidik; Sri Wardhani
The Journal of Pure and Applied Chemistry Research Vol 7, No 1 (2018): Edition January-April 2018
Publisher : Chemistry Department, The University of Brawijaya

Fly ash is the solid of the remaining coal combustion carried along with the exhaust gas and captured by the air controller. Fluids in fly ash are Al2O3, SiO2, Fe2O3, CaO, MgO, Na2, and SO3 which are similar to zeolites. So that fly ash can be used as a substitute for zeolite for various carrier of fertilizer. The result of slow release test is known that N element has higher release level. The NPK fertilizer activity test of Fly Ash Slow Release was done on chilli plant with parameter of variation of fertilizer composition and plant height. Based on research result, fly ash-TSP 2: 1 fertilizer has the best result.

Synthesis of precipitated Calcium Carbonate (PCC) From Lime Rock Nature Methods Caustic Soda (Studies Concentration HNO3) Noor Isnaini Azkiya; Fanny Prasetia; Elsa Desyta Putri; Anggita Rosiana; Sri Wardhani
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

The limestones was abundant in Tuban, East Java and have high calcium mineral content. Nevertheless, in the economic value, limestone have low price. Aim the research is prepare Precipitated Calcium Carbonate (PCC) by caustic soda method. In this method, calcium was dissolved in HNO3 with different concentration (2, 4,6, 8 M). The Filtrate obtained then was added by Na2CO3 1 M to get PCC. As the results, The white PCC obtained with the highest rendement is 64,7% when added HNO3 6M. Analysis of functional group by FTIR show that there were strong absorption in the 844,76; 912,27 dan 1411,40 cm-1 that indicated carbonate group. Analysis of Cristallinity by XRD show that there were the peak characteristic of 2 on 29,50˚; 36,07˚ dan 39,50˚that representative calcite structure. SEM-EDX Analysis show that PCC have a mixing structure of calcite and vaterite. Keywords: limestone, PCC, caustic soda

Study of Ozone Synthesis With Methods of Plasma Discharge Rachmat Triandi Tjahjanto; Sri Wardhani; Ulfa Anggraini
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

In this research an ozonator prototype has been built to produce ozone, consists of air pump, gas flowmeter, an ozone reactor, and a glass pipe of nozzle. The most important part of the device is the reactor which consisting three main parts; 5 mm alloy electrode connected to a high voltage generator in the form of electrical gas stove lighter, 1 mm copper negative electrodes connected to the ground and a glass plasma discarge. The ozone gas formed is flowed to a container consisting of methyl orange solution 20 ppm at wave lenght of 470 nm. The concentration of ozone is determined by spectrophotometry method. The ozonator is characterized by ozonation periode variation of 5, 10, 15, 20, 25, and 30 minutes with the voltage used 3,5 volt, voltage variation of 3, 4, and 5 volts and flow rate variation of 227, 363, 464, 662, 864, and 1060 mL/min at the voltage used 3.5 volt. The result showed that the longer period and the higher voltage used for ozonation, the higher the ozone gas produced. The concentration of ozone obtained in this research is 0.76 ppm reached at 363 mL/min with 20 minutes ozonation duration.

Photocatalytic Degradation of Methylene Blue Using TiO2-Natural Zeolite as A Photocatalyst Sri Wardhani; Moh. Farid Rahman; Danar Purwonugroho; Rachmat Triandi Tjahjanto; Christiana Adi Damayanti; Ika Oktavia Wulandari
The Journal of Pure and Applied Chemistry Research Vol 5, No 1 (2016)
Publisher : Chemistry Department, The University of Brawijaya

TiO2 - zeolite photocatalyst has been prepared by impregnation of TiO2 onto acid -activated natural zeolite. The XRD data confirmed that natural zeolite used in this work is predominated with mordenite and clinoplitolite types, whereas anatase type can be attributed to TiO2. The highest performance of TiO2 – zeolite, which is indicated by surface area of 13.304 m2/g and band gap energy of 3.15 eV, is obtained when 10 mmol of TiO2 is impregnated onto the zeolite. The ability of this photocatalyst is evaluated by examining degradation of methylene blue (MB) in the presence of UV source. The effects of MB concentration, pH and UV irradiation time on the degradation are studied in a batch reactor. It is interesting since the addition of H2O2 can improve the degradation effeciency of MB. The optimum result is achieved at pH 11, duration of UV irradiation of 50 min, showing degradation amount of 98.25 %. Surprisingly, the chemical oxygen demand (COD) in the degraded MB aqueous solution can be reduced about 77.9%, exhibiting the improvement of water quality. No loss of the activity of the degradation efficiency after reusability of this TiO2 - zeolite photocatalyst for at least 4 times.

Co-Authors A.A. Ketut Agung Cahyawan W Afif Eka Rahma Setiyanto Akhmad Bahari Alfina, Bulan Tahta Andarini, Novita Rizqi Angga Fami Rayendra Anggita Rosiana Angraini, Erni Anin Eka Sulistyawati Anna Safitri Antoni Anugerah Dewi Harumsari, Anugerah Dewi Arief, Miftahudin Aryati, Ani Asan , Mat Asri Nurul Huda Astriani, Meli Asvic Helida, Asvic Ayu Fahimah Diniyah Wathi Ayu, Annisa Mustikaning Bagas Rasid Sidik Christiana Adi Damayanti Damayanti, Christiana Adi Danar Purwonugroho Danar Purwonugroho Danar Purwonugroho Danar Purwonugroho Danar Purwonugroho Danar Purwonugroho Danar Purwonugroho Darjito Darjito Darjito Darjito Darjito Darjito Darjito Darjito Darjito, Darjito Darmawan, Panji Rahmat Deka Permatasari Della Afriyana Dhesy Galuh R. Diah Mardiana Dwi Fungky Ratnasari, Dwi Fungky Dwiatmoko, Adid A. Eko Waluyo Ellya Indahyanti Elsa Desyta Putri Endang Sulistianingsih Erlaningtias Hutami Ardana Putri, Erlaningtias Hutami Ardana Ervina Mukharomah, Ervina Fanny Prasetia Fanny Prasetia Fatonah, Sri Ferik Antyo Agus Wibowo Fidela Azaria Antasari Fraditasari, Risca Gatrananda, Sayyid Izzudin Halim, Ravita Sari Harsuko Riniwati Helyati, Helyati Herdian Akbar Mardiansyah Hertiavi, Maria Agatha Ida Fitriani Ika Oktavia Wulandari Ilham Pratomo Ilham Sidik Ira Mardiana Istiani, Istiani Joni Prasetyo, Joni Karelius Karelius Katiza, Selza Komalasari, Fanny Komarasati, Qori Kumala, Diana Kumalasari, Linda Kurnia Saputri, Kurnia Kurniawan, Kezia F. Laksono Trisnantoro Layta Dinira Marlina Ummas Genisa Meirawati, Dian meli Astriani Miralda Syakirah Mohammad Abdul Ghofur Mohammad Farid Rahman Mohammad Misbah Khunur Mufidah Afiyanti Muhammad Misbah Khunur Muhammad Misbah Khunur Nadhir Dicky Perdana Nadhira Izzatur Silmi Nadifah, Umi Nino Rinaldi Nita Nuraini, Nita Noor Isnaini Azkiya, Noor Isnaini Nurul Indahsari Oda Silvia Permatasari Oktaria Ardika Pinangsih, Arum Candra Primasari Fitria Purwonugroho, Danar Purwonugroho, Danar Rachmat Triandi Tjahjanto Rahmanda, Deri Ramadhana, Al Kautsar Kurniawan Ranti, Ranti Rendy Muhamad Iqbal Reno Sunarinda Endrayana Ridha Dini Rahmawati Rizha Hardyansah Rohmawati, Lynna Rosalin, Sovia Safitri, Anna Safitri, M.Sc., Ph.D (Scopus ID : 57189988164 Saleh Hidayat Sambodo, Agung Dono Sambodo, Agung Dono Samsilayurni Sanday Jamaludin Sarosa, Yoang Enggaling Septiani, Dilla Eka Seruni Swasti Pundisari Shafa Yumna Salsabila, Nabila Siti Mutrofin Sovia Rosalin Sri Yanti Suhartati Suhartati Suharto Linuwih Suhernadi, Arif Sumah , Astrid Sri Wahyuni Sumah, Astrid Sri Wahyuni Suprihatin*, Suprihatin Tasya Salsabilah, Farah Taufiqulloh Taufiqulloh Tutik Setianingsih Ulfa Andayani, Ulfa Ulfa Anggraini Ummi Hiras Habisukan, Ummi Hiras Vivid Ayu Lestari, Vivid Ayu Wahdah, I'anatul Wahyu Lestari Wahyu Santoso Wibisono, Gilang Kopa Widjaya, Robert R. Wisnu Sunarto Wiyanto - Wulandari Saputri, Wulandari Yenny Kornitasari Yenny Kornitasari, Yenny Yoandra Nadya Yoniansyah Yulia Nur Ekawati Yuniar Ponco Prananto Yusnita, Dina Yuvita Yuvita

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