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Effect of PEG-2000 on saturation magnetization Fe3O4 particles synthesized with coprecipitation method Dwi Puryanti; Dori Andani; Merry Thressia
Journal of Physics: Theories and Applications Vol 1, No 1 (2017): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (840.763 KB) | DOI: 10.20961/jphystheor-appl.v1i1.4712

Abstract

Synthesis of Fe3O4 particles was performed using coprecipitation method. Iron sand base material obtained by processing the iron rocks by means of destruction and extraction. Iron rocks were taken from the village Surian, South Solok of West Sumatera. Iron sand that has been extracted reacted with HCL and NH4OH. Furthermore, the PEG-2000 were added to see its effect on the resulting magnetization saturation. Variations in the composition ratio of iron sand and PEG-2000 are 1:0, 1:1, 1:2 and 1:4. The crystal structure of the sample was confirm using x-ray diffraction method. Characterization of magnetic properties carried out using vibrating Sample Magnetometer (VSM). The results of magnetic properties show that the saturation magnetization decreases with increasing of PEG-2000 content in the range of 99.50emu/g - 0,84 emu/g.
Karakterisasi Struktur Kristal dan Sifat Magnetik Magnet Stronsium Ferit Pasir Besi Batang Sukam Kabupaten Sijunjung Sumatera Barat Arif Budiman; Dwi Puryanti; Sri Mulyadi Dt. Basa; Muhammad Rizki; Helfi Syukriani
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2016: Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2016
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4310.763 KB) | DOI: 10.20961/prosidingsnfa.v1i0.4500

Abstract

Abstract: The synthesis and characterization of the crystal structure and magnetic properties of strontium ferrite magnets (SrO.6Fe2O3) has been done. Hematite (Fe2O3) is synthesized from iron sand of Batang Sukam Sijunjung Sumatera Barat through the oxidation process by temperature 700ºC for 3.0 hours. Strontium carbonate (SrCO3) was obtained from Merck product with a purity of more than 99%. Synthesis of strontium ferrite magnets are made through a process of solid-solid mixing and sintering at a temperature of 1000ºC for 3.0 hours. The results of characterization of X-ray diffraction indicates that it has formed a single phase strontium ferrite magnets with a hexagonal crystal structure. The result of measurement of the magnetic properties shows that an average magnetic susceptibility of strontium ferrite magnet is 266.7 × 10-8 m3 /kg. Keywords: strontium ferrite magnet, iron sand, crystal structure and magnetic susceptibility. Abstrak: Telah dilakukan sintesis dan karakterisasi struktur kristal dan sifat magnetik magnet stronsium ferit (SrO.6Fe2O3). Hematit (Fe2O3) disintesis daripasir besi Batang Sukam Kabupaten Sijunjung Sumatera Barat melalui proses oksidasi dengan temperatur 700ºC selama 3,0 jam. Stronsium karbonat (SrCO3) diperoleh dari produk Merck dengan kemurnian lebih dari 99 %. Sintesis magnet stronsium ferit dibuat melalui proses solid-solid mixing dan disintering pada suhu 1000ºC selama 3,0 jam. Hasil karakterisasi difraksi sinar-X menunjukkan bahwa telah terbentuk single phase magnet stronsium ferit dengan struktur kristal heksagonal. Hasil pengukuran sifat magnet menunjukkan bahwa magnet stronsium ferit memiliki suseptibilitas magnetik rata-rata 266,7 × 10-8 m3/kg. Kata Kunci: magnet stronsium ferit, pasir besi, struktur kristal dan suseptibilitas magnetik.
THE EFFECT OF SYNTHETIC ZEOLITES ON SENSITIVITY AND STABILITY OF URIC ACID BIOSENSOR USING CYCLE VOLTAMETRY METHOD Iza Faizah; Dwi Puryanti; Afdhal Muttaqin
Spektra: Jurnal Fisika dan Aplikasinya Vol 3 No 3 (2018): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 3 Issue 3, December 2018
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (285.882 KB)

Abstract

The synthesis of synthetic zeolite modified biosensor material has been carried out to detect uric acid. This study aims to look at the effect of synthetic zeolite on uric acid biosensor material on sensor stability and sensitivity. The biosensor was use to measure uric acid using uricase produced Lactobacillus plantarum. Modification of biosensor material using synthetic zeolite content of Sodalit is added in a mixture of graphite and paraffin. Carbon paste electrode (EPK) was made with graphite and paraffin comparison 70 mg : 30 mg, while zeolite modified carbon paste electrode (EPKZ) with graphite, paraffin and zeolite comparison 50 mg: 30 mg: 20 mg. In each electrode, 7.5 μl of L.plantarum pellet (EPKZLP) was dropped. Electrode performance testing was carried out using Cyclic Voltammetry. Modification results affect biosensor performance such as sensitivity and stability. The highest current is produced by EPKZLP with a current range of 0.0143 - 0.0592 mA. The best sensitivity is produced in EPKZLP with a value of 0.031 mAcm-2mM-1. The best stability was found in EPKZLP with a percentage of stability on day 14 was 30.9%. The average standard deviation generated in this study is 0.0024 mA with a relative error value was 7.8%. Addition of zeolite to biosensor material produced in this study has met several criteria to be used as a sensor. Keywords: uric acid biosensor, zeolite, sodalit, sensitivity, stability.
SYNTHESIS OF SODALITE ZEOLITE FROM COAL BOTTOM ASH WITH VARIATION OF NaAlO2 CONCENTRATION USING ALKALI MELTING HYDROTHERMAL METHOD Rahmatul Hanifah; Dwi Puryanti; Afdhal Muttaqin
Spektra: Jurnal Fisika dan Aplikasinya Vol 3 No 3 (2018): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 3 Issue 3, December 2018
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (157.873 KB)

Abstract

Synthesis of zeolites from bottom ash using alkali melting hydrothermal method with variation concentration of NaAlO2 solution had been done. Concentration of NaAlO2 solution was varied for 2,5 M (Z1), 2 M (Z2), 1,5 M (Z3) and 1 M (Z4). The bottom ash and NaOH are melted for 3 hours at 750C. Then, the sample is heated through a hydrothermal process with NaAlO2 crystallization medium. Then the sample is neutralized with aquades up to pH 9-10. Characterization of sample includes characterization zeolite type using of. The results of characterization using XRD show that the zeolite formed on samples Z1, Z2, and Z3 are zeolites of sodalite type and on Z4 sample of zeolite type are sodalit, nosean, and megakalsilit. The highest sodalite purity was obtained in Z3 sample, which is 73%.
Penentuan Kualitas Air Muara Sungai Batang Arau Melalui Pengujian Total Dissolved Solid (TDS), Total Suspended Solid (TSS), dan Kandungan Logam Berat Charlie Ofiyen; Dwi Puryanti
Jurnal Fisika Unand Vol 11 No 3 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.144 KB) | DOI: 10.25077/jfu.11.3.278-284.2022

Abstract

Penelitian ini bertujuan untuk menentukan konsentrasi logam berat, suhu, pH, konduktivitas listrik, total padatan terlarut (TDS) dan total padatan tersuspensi (TSS) pada sampel air muara Sungai Batang Arau. Nilai konsentrasi logam berat diukur menggunakan alat inductively coupled plasma (ICP), suhu diukur menggunakan termometer, pH diukur menggunakan pH meter, konduktivitas listrik diukur menggunakan konduktiviti meter, TDS dan TSS ditentukan menggunakan metode gravimerti. Dari hasil penelitian diperoleh nilai rata-rata rata-rata suhu sebesar 28,52 ℃. Nilai rata-rata pH sebesar 6,76. Nilai rata-rata konduktivitas listrik sebesar 176,43 µS/cm. Nilai rata-rata TDS sebesar 1040,5 ppm. Berdasarkan PP. No. 82 Tahun 2001 nilai rata-rata TDS di muara Sungai batang Arau telah melebihi standar baku mutu air kelas II yaitu sebesar 1000 mg/l. Nilai rata-rata TSS sebesar 204,9 ppm, nilai rata-rata TSS juga telah melebihi baku mutu PP. No. 82 Tahun 2001 kelas II yaitu sebesar 50 mg/l. Nilai kosentrasi logam berat Cd, Cu, dan Hg di muara Sungai Batang Arau telah melebihi baku mutu yang ditetapkan PP. No. 82 Tahun 2001. Dari hasil yang didapatkan dapat disimpulkan bahwa kualitas air di muara Batang Arau telah terjadi pencemaran. This study aims to determine the concentration of heavy metals, temperature, pH, electrical conductivity, totally dissolved solids (TDS) and totally suspended solids (TSS) in the estuary samples of the Batang Arau River. The value of heavy metal concentration was measured using an inductively coupled plasma (ICP), temperature was measured using a thermometer, pH was measured using a pH meter, electrical conductivity was measured using a conductivity meter, TDS and TSS were determined using the gravimerity method. From the results of the study, the average value of the temperature was 28.52. The average value of pH is 6.76. The average value of electrical conductivity is 176.43 S/cm. The average value of TDS is 1040.5 ppm. Based on PP. No. 82 of 2001 the average TDS value at the estuary of the Batang Arau River has exceeded the class II water quality standard, which is 1000 mg/l. The average TSS value is 204.9 ppm, the TSS average value has also exceeded the PP quality standard. No. 82 of 2001 class II that is equal to 50 mg/l. The concentration values of Cd, Cu, and Hg heavy metals in the Batang Arau River estuary have exceeded the quality standards set by PP. No. 82 of 2001. From the results obtained, it can be concluded that the water quality in the Batang Arau estuary has been polluted.
Optimalisasi Pemanfaatan Media Online Phet Simulation Untuk Upaya Peningkatkan Pemahaman Konsep Fisika di SMA N 2 Harau Ramacos Fardela; Dedi Mardiansyah; Meqorry Yusfi; Elistia Liza Namigo; Afdal; Mutya Vonnisa; Muldarisnur; Harmadi; Imam Taufiq; Ahmad Fauzi Pohan; Astuti; Afdhal Muttaqin; Dian Fitriyani; Dwi Pujiastuti; Sri Handani; Dwi Puryanti; Trengginas Eka Putra Sutantyo; Zulfi; Feriska Handayani Irka; Alimin Mahyudin; Nini Firmawati; Dian Milvita; Sri Oktamuliani; Sri Rahayu Alfitri Usna; Rico Adrial
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 2 No. 2: December 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (561.748 KB) | DOI: 10.33369/icomes.v2i2.24459

Abstract

Fisika menganut metodologi ilmiah (sains) yang memuat tiga kegiatan terpadu dan membentuk daur (cycles) empirico-logico-verification yang pertama kali dirintis oleh I. Newton yaitu (1) pengamatan gejala-gejala alam (kegiatan empiris melalui fisika eksperimen), (2) Penalaran untuk menjelaskan hasil pengamatan tersebut dan ekstensinya sehingga mampu menghasilkan ramalan mengenai gejala baru (kegiatan berlogika melalui fisika teori) dan (3) pengujian mengenai kesesuaian ramalan tersebut dengan realitas alam (kegiatan verifikasi melalui fisika eksperimen). Keberadaan laboratorium di sekolah-sekolah menjadi kunci keberhasilan dalam memperkenalkan tiga kegiatan terpadu tersebut. Sekolah Menengah Atas Negeri (SMAN) 2 Harau, Kabupaten Lima Puluh Kota merupakan sekolah di bawah naungan Provinsi Sumatera Barat dengan jarak sekitar 138 km dari Jurusan Fisika FMIPA Universitas Andalas tepatnya berada di Kecamatan Harau. Dari informasi yang diperoleh masih terbatasnya sarana dan prasarana seperti jumlah peralatan praktikum. Berdasarkan hal tersebut, tim pengabdian Jurusan Fisika FMIPA Universitas Andalas akan melaksanakan rangkaian kegiatan pengabdian masyarakat di SMA N 2 Harau dengan pemanfaatan media online salah satunya Phet- Simulation. Hasil pengabdian menunjukkan 90 % siswa mengatakan setuju dan sangat setuju bahwa kegiatan seperti ini memberikan manfaat bagi pemahaman materi di bidang Fisika. Kegiatan seperti ini perlu dilakukan lebih banyak oleh Tim Pengabdian sehingga masyarakat merasakan keberadaan perguuruan tinggi yang ada didaerahnya. Kata kunci: PhET Colarado; Simulasi Fisika; dan Pengabdian Masyarakat
Remediation of Heavy Metals in the Leachate of the Final Waste Processing Site Using Magnetite Nanoparticles Iswandi Iswandi; Dwi Puryanti; Elvaswer Elvaswer
Eduvest - Journal of Universal Studies Vol. 2 No. 5 (2022): Journal Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1990.733 KB) | DOI: 10.59188/eduvest.v2i5.438

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Nanoparticles are iron oxides that are used in various fields of life, one of which is to absorb heavy metals. In this study, magnetite (Fe3O4) nanoparticles were synthesized using the correspirate method and magnetite nanoparticle templates with PEG-6000. Synthesis of magnetite nanoparticles was carried out to obtain magnetite nanoparticles to be used to remediate heavy metals Cu, Ni and Mn in waste leachate. The susceptibility analysis of the leachate sample type showed that the type of magnetic material. The calculation results from the XRD diffractogram obtained that the crystal size of Fe3O4 nanoparticles is 56.35 nm. By varying the mass of 0.4 grams of Fe3O4, 0.8 grams of Fe3O4 and coating Fe3O4 using PEG 6000, it is known that the reduction in the concentration of heavy metal Cu is 7.71%, 23.09% and 42.31%, respectively. The percentage reduction in the concentration of heavy metal Ni was 6.29%, 9.45% and 7.09%, respectively.The percentage reduction in the concentration of heavy metal Mn was 25.369%, 19.98% and 4.05%, respectively. This indicates that Fe3O4 and PEG-6000 nanoparticles are able to reduce the concentration of heavy metals in waste leachate contained in the leachate sample
Profil Kualitas Air Sumur Akibat Intrusi Air Laut di Kawasan Pantai Air Manis Kota Padang Nabila Qathrunnada; Dwi Puryanti; Eko Purwanto
Jurnal Fisika Unand Vol 12 No 1 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (722.412 KB) | DOI: 10.25077/jfu.12.1.144-150.2023

Abstract

Penelitian ini bertujuan untuk mengetahui kualitas dan tingkat pencemaran air sumur akibat intrusi air laut di kawasan Pantai Air Manis melalui pengujian beberapa parameter pencemaran. Pengujian nilai konduktivitas listrik dan Total Dissolved Solid (TDS) dilakukan untuk menentukan tingkat keasinan air sumur. Pengujian Total Suspend Solid (TSS), pH dan temperatur dilakukan untuk mengetahui kualitas air sumur. Nilai konduktivitas listrik yang didapatkan dari 15 sumur berkisar antara 47,33 µS/cm - 719,67 µS/cm dimana nilai ini termasuk kategori air tawar. Dari hasil pengujian TDS, terdapat 2 sampel yang melebihi standar air tawar menurut Panitia Ad Hoc Intrusi Air Asin (PAHIAA) yaitu sampel 1 (1265,5 mg/L) dan sampel 2 (1028 mg/L) dimana lokasi sampel ini sangat dekat dengan pantai di arah barat.  Kecilnya indikasi adanya intrusi air laut dikarenakan lokasi yang dekat dengan perbukitan yang dapat menjadi daerah resapan sehingga air tanah mengalir ke arah laut dengan tekanan tinggi. Hasil pengujian nilai TSS menunjukkan terdapat 1 sampel yang melebihi standar mutu air bersih. Sedangkan berdasarkan hasil pengujian pH dan temperatur, 15 sampel air sumur masih memenuhi standar mutu air bersih. Nilai Indeks Pencemaran (IP) rata-rata air sumur pada lokasi penelitian adalah 0,6050 sehingga dapat dikategorikan dalam kondisi tidak tercemar.
Pengaruh Penambahan Serat Daun Nanas terhadap Sifat Fisis dan Mekanik Papan Semen Gipsum Siska Oktaviani; Dwi Puryanti
Jurnal Fisika Unand Vol 9 No 1 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.383 KB) | DOI: 10.25077/jfu.9.1.31-37.2020

Abstract

Penelitian tentang pengaruh penambahan serat daun nanas terhadap sifat fisis dan mekanik papan semen gipsum telah dilakukan dalam bentuk komposit laminat. Persentase serat daun nanas yang digunakan adalah 0%, 2%, 4%, 6%, 8%. Sifat fisis yang diuji meliputi densitas dan daya serap air. Nilai densitas terendah diperoleh pada persentase serat daun nanas 8% yaitu 1,41 kg/cm3. Nilai densitas berbanding terbalik dengan nilai daya serap air. Persentase serat daun nanas 8% memiliki nilai densitas terkecil tetapi daya serap air yang besar. Nilai daya serap air pada persentase serat daun nanas 8% yaitu 39,17%. Pengujian mekanik yang diuji meliputi kuat tekan dan kuat lentur. Alat uji yang digunakan untuk kuat tekan dan kuat lentur adalah Universal Testing Machine (UTM). Nilai kuat tekan 5 kg/cm2 hingga 11,67 kg/cm2 telah memenuhi SNI 03-3449-2002. Nilai kuat lentur tertinggi pada persentase serat 2% dan 6% yaitu 21 kg/cm2 telah memenuhi SNI 01-4449-2006. The research on the effect of pineapple leaf fiber addition to the physical and mechanical properties of gypsum cement board has been carried out in the form of laminate composites. The percentage of pineapple leaf fiber used is 0%, 2%, 4%, 6%, 8%. Physical properties that were tested including density and water absorption. The lowest density value obtained at pineapple leaf fiber percentage of 8% that is 1.41 kg / cm3. The value of density inversely proportional to the value of water absorption. Percentage of 8% pineapple leaf fiber has the smallest density value but large water absorption. The value of water absorption at pineapple leaf fiber percentage 8%, that is 39.17%. Mechanical properties that were tested including compressive strength and flexural strength. The compressive strength and flexural strength were measured using Universal Testing Machine (UTM). The value of compressive strength that is           5 kg/cm2 to 11.67 kg/cm2 meets SNI 03-3449-2002. Highest flexural strength at fiber percentage 2% and 6%, that is 21 kg / cm2 meat SNI 01-4449-2006. 
Mapping of Sensing Performance of Concentric and Non-Concentric Silver Nanoring Mulda Muldarisnur; Ilham Perdana; E. Elvaswer; Dwi Puryanti
Emerging Science Journal Vol 7, No 4 (2023): August
Publisher : Ital Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/ESJ-2023-07-04-04

Abstract

Sensors play a critical role in improving overall human quality of life. They have been employed in most aspects of our lives. A recently emerging sensing platform is based on plasmonic resonance at the boundary of metals and dielectrics. Localized surface plasmon resonances–based sensors offer miniaturization, a simple setup, and relatively high sensitivity for real-time measurements. The reported figure of merit (FOM) of the LSPR-based sensor is generally limited, primarily due to its broad resonance peak. Nanorings composed of metal nanoparticles are known for their broad-range resonance tunability, high field localization, and large sensing area. Asymmetry of the nanoring with the introduction of core offset relaxes the selection rule for mode mixing, thus resulting in a narrower resonance peak. This may overcome broad resonance peak restriction. Concentric and non-concentric nanorings were simulated using the boundary element method implemented with the MNPBEM toolbox. We map the performance of nanoring sensors over a wide range of geometrical variations, namely, diameter, ring shell thickness, and the offset of the inner ring to the center of the outer ring wall (core offset). Sensitivity and FOM were found to rely substantially on the nanoring size parameters. The sensing performance map helps to obtain optimized nanoring parameters for the intended spectral range region. The obtained high sensitivity and FOM are much higher than the data available in the literature over visible and NIR ranges. The findings demonstrate the potential of nanorings for biosensing applications. Doi: 10.28991/ESJ-2023-07-04-04 Full Text: PDF
Co-Authors A. Fadhil Desafa A.A. Ketut Agung Cahyawan W Adrial, Rico Afdal Afdal Afdal, Afdal Afdhal Muttaqin Ahmad Fauzi Pohan Ahmad Furqan Alimin Mahyudin Ardian Putra Arif Budiman Arif Budiman Astuti Astuti Astuti Astuti Astuti Astuti Astuti Astuti Bukasir, Yennie Puspa Charlie Ofiyen Cinthia Gestarila Dahlianum Dahlianum Dahlianum Dahlianum Dahyunir Dahlan Damayanti, Elok Dedi Mardiansyah Della Amelia Dian Fitriyani Dian Fitriyani Dian Fitriyani Dian Milvita Dori Andani Dori Andani, Dori Dwi Pujiastuti Dwi Pujiastuti Eko Purwanto Eko Purwanto Elistia Liza Namigo, Elistia Elvaswer Elvaswer Elvaswer Faizah Faizah Faizah Musra Faizah Musra Febri Naldi Febriati Nanda Feriska Handayani Feriska Handayani Irka, Feriska Handayani Fiqi Diyona Frizky Norman Haldis Alvaro Harmadi Harmadi Harmadi Harmadi Helfi Syukriani Helfi Syukriani Hermansyah Aziz Herviya Herviya Herviyana Herviyana Ihsan Alamsah Ilham Perdana Imam Taufik Imam Taufiq Imam Taufiq Iqbal Ramadhan Iqbal Ramadhan Irfan Nursa Iswandi Iswandi Iza Faizah M. Ali Shafii Marzuki Marzuki Marzuki Marzuki Meqorry Yusfi Merry Thressia Mohammad Ali Shafii Mora Mora Mora Mora Muhammad Arif Muhammad Arif Muhammad Faisal Muhammad Faisal Muhammad Kahfi Muhammad Kahfi Muhammad Ridho Isdi Muhammad Ridho Isdi Muhammad Rinaldi Muhammad Rizki Muhammad Rizki Muldarisnur, Mulda Mustofa Mustofa Mutya Vonnisa Nabila Qathrunnada Nadya Eka Handayani Eldrin Naela Amalia Zulfa Naela Amalia Zulfa Nini Firmawati Nixcoriani Putri Nurul Hasanah Olly Norita Tetra Puteri Kartika Putri Putri Rahmad Rasyid Rahmad Rinanda Rahmat Rasyid Rahmat Rasyid Rahmatil Hayati Rahmatul Hanifah Rahmatul Hanifah Ramacos Fardela Rani Delvihardini Rani Delvihardini Repiani, Repiani RR. Ella Evrita Hestiandari Runi Sahara Santi Dewi Rosanti Santi Dewi Rosanti, Santi Dewi Siska Oktaviani Sisri Wahyu Nengsi Solly Aryza Sri Agustianingsih, Maharani Sri Handani Sri Mulyadi Dt. Basa Sri Oktamuliani Trengginas Eka Putra Trengginas Eka Putra Sutantyo Tria Rizki Safitri Tringginas Eka Putra Sutantyo Usna, Sri Rahayu Alfitri Veithzal Rivai Zainal Wargiyana, Sarah Widya Anggraini Widya Anggraini Wildian Wildian Yeni Fathatun Najihah Yennie Puspa Bukasir Yuli Yetri Yusrina Meydiyati Zozy Aneloi Noli Zulfi Zulfi Zulfi Zulfi Zulfi Zulfi