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KARAKTERISTIK WETTABILITY (CONTACT ANGLE) PADA NANOFIBER PANI/PVA/GO SEBAGAI SEPARATOR BATERAI LITHIUM-ION: Kata Kunci: nanofiber, wettability (contact angle), separator baterai. Putri, Abrinda Radika; Kusumawati, Diah Hari; Suaebah, Evi
Inovasi Fisika Indonesia Vol. 13 No. 3 (2024): Vol 13 No 3
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v13n3.p33-39

Laser-Induced Graphene Oxide on Polyimide Sheet: The Effect of Current Regulation on the Laser Power Stability Martila, Lenny Intan; Suryadi, Suryadi; Nursidik Yulianto; Yuliati Herbani; Isnaeni, Isnaeni; Supardi, Zainul Arifin Imam; Suaebah, Evi; Iyon Titok Sugiarto
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p100-112

Graphene oxide is a two-dimensional substance that shares the same structure as graphene and can be produced using several methods. The difficulty for green technology lies in developing a cost-effective and efficient method to produce graphene and graphene oxide without relying on chemical processes. A highly sustainable technology involves the use of a laser diode, which is both cost-effective and environmentally friendly. This technique produces a material known as laser-induced graphene/graphene oxide (LIG/LIGO). From a commercial standpoint, the laser diode is typically purchased without an electronic stabilizer component. Nevertheless, laser stability is crucial for the production process of LIG/LIGO. The objective of our study is to examine the impact of laser current management on the production of graphene on a polyimide (PI) sheet utilizing a 450 nm diode laser. The laser controller we utilize is the National Instruments (NI) PXIe-1085 device. The optical power of the laser diode was measured between 0.21 and 0.79 W. After the laser current was stabilized, the power slightly shifted, ranging from 0.18 to 0.86 W. Both experiments were conducted with a current range of 0.3 to 1 A. Before regulation, the laser diode experiences current fluctuations in the range of around 0.01 to 0.03 A. The study findings highlight the significance of laser current management in manufacturing LIG/LIGO by ensuring a consistent and precise laser power output, hence minimizing flaws in the final product. However, the analysis reveals that graphene oxide is the predominant yield in this characterization. This fact is caused by the presence of a graphene layer not exposed to the surface during measurement. This approach provides several benefits, such as the capacity to produce graphene/GO in a targeted, non-chemical, and fast manner, as well as its potential for diverse applications.

ANALISIS KANDUNGAN (Fe) DAN (Mn) PADA INSTALASI PENGOLAHAN AIR (IPA) 1 DAN 3 PT HANARIDA TIRTA BIRAWA SIDOARJO: Kata Kunci: Kadar Fe, Kadar Mn, Instalasi Pengolahan Air, Industri Air alfan, mohamad wafiq nafii alfan; Adiono, Muchammad; Suaebah, Evi; Fitriana, Fitriana; Rohmawati, Lydia
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p33-42

Penelitian ini bertujuan untuk menganalisis kinerja sistem instalasi pengolahan air (IPA) 1 dan 3 di PT Hanarida Tirta Birawa dalam menurunkan kadar besi (Fe) dan mangan (Mn). Penelitian ini sangat penting dilakukan untuk memberikan informasi mengenai berbagai bahaya logam berat yang terdapat dalam air pra olahan yang dapat memicu berbagai gangguan kesehatan, sekaligus memberikan informasi hasil pengolahan air yang dilakukan di PT Hanarida Tirta Birawa. Sampel air diambil dari kedua IPA kemudian dilakukan pengujian kadar Fe dan Mn skala laboratorium. Hasil analisis menunjukkan bahwa rata-rata kadar Fe pada IPA 1 dan 3 masing-masing adalah 0,11 Mg/L dan 0,09 Mg/L, sedangkan untuk Mn adalah 0,044 Mg/L dan 0,046 Mg/L. Setelah melalui proses pengolahan, kadar Fe dan Mn mengalami penurunan yang sangat signifikan, mencapai efisiensi penurunan sebesar 94-96% untuk Fe dan 97-98% untuk Mn. Kadar Fe dan Mn pada air olahan jauh di bawah batas maksimum yang ditetapkan dalam Peraturan Menteri Kesehatan Republik Indonesia No 2 Tahun 2023, yaitu 0,2 Mg/L untuk Fe dan 0,1 Mg/L untuk Mn. Hasil ini menunjukkan bahwa sistem pengolahan air di PT Hanarida Tirta Birawa telah beroperasi dengan sangat baik dan menghasilkan air minum yang memenuhi standar kualitas air minum yang berlaku serta telah memenuhi standar internasional ISO 9001:2000. Kata Kunci: Kadar Fe, Kadar Mn, Instalasi Pengolahan Air, Industri Air Abstract This research aims to analyze the performance of water treatment installation systems (IPA) 1 and 3 at PT Hanarida Tirta Birawa in reducing iron (Fe) and manganese (Mn) levels. This research is very important to carry out information about the various dangers of heavy metals contained in pre-treated water which can trigger various health problems, as well as providing information on the results of water treatment carried out at PT Hanarida Tirta Birawa. Water samples were taken from both IPAs and then tested for Fe and Mn levels on a laboratory scale. The analysis results show that the average Fe content in IPA 1 and 3 is 0.11 Mg/L and 0.09 Mg/L respectively, while for Mn it is 0.044 Mg/L and 0.046 Mg/L. After going through the processing process, Fe and Mn levels decreased very significantly, reaching a reduction efficiency of 94-96% for Fe and 97-98% for Mn. The levels of Fe and Mn in processed water are far below the maximum limits stipulated in the Regulation of the Minister of Health of the Republic of Indonesia No. 2 of 2023, namely 0.2 Mg/L for Fe and 0.1 Mg/L for Mn. These results indicate that the water treatment system at PT Hanarida Tirta Birawa has operated very well and produces drinking water that meets applicable drinking water quality standards and meets the international standard ISO 9001:2000 Keywords: Fe content, Mn content, water treatment plant, water industr

ANALISIS PENAMBAHAN DOSIS ALUMINIUM SULFAT TERHADAP PH AIR DENGAN METODE JAR-TEST DI PT. HANARIDA TIRTA BIRAWA: Kata Kunci: Jar-test, Koagulan, pH Lala, Lailatus Syafa'ah; Adiono, Muchammad; Suaebah, Evi; Rohmawati, Lydia
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p27-32

Metode Jar Test merupakan suatu metode pengujian untuk mengetahui kemampuan suatu koagulan dan menentukan kondisi operasi dosis optimum pada proses penjernihan air. Jar Test biasanya digunakan untuk menentukan konsentrasi dari koagulan. Koagulan yang digunakan yaitu aluminium sulfat. Besaran yang diukur dan dicatat dalam Jar Test meliputi pH dan NTU (Nephelometric Turbidity Unit). Namun, parameter yang di ukur pada penelitian ini yaitu pH. pH merupakan parameter penting untuk menentukan kadar asam atau basa dalam air. pH air yang di produksi oleh PT. Hanarida Tirta sekitar >7. pH yang sesuai akan meningkatkan efisiensi pengolahan air dengan mengurangi kekeruhan dan kandungan zat-zat terlarut. Berdasarkan hasil pengujian jar-test, pemberian bahan kimia yaitu aluminium sulfat dapat mengurangi nilai pH kadar air baku di PT. Hanarida Tirta Birawa dengan penurunan sebesar 5%. Dari hasil tersebut menunjukkan bahwa nilai PH dengan penambahan koagulan telah memenuhi standart SNI 698911.2019. Adanya dosis yang optimal dalam penggunaan aluminium sulfat dapat mengurangi potensi risiko kesehatan akibat penggunaan koagulan yang berlebihan. Kata Kunci: Jar-test, Koagulan, pH Abstract The Jar Test method is a test method to determine the ability of a coagulant and determine the optimum dosage operating conditions in the water purification process. Jar Test is usually used to determine the concentration of the coagulant. The coagulant used is aluminum sulfate. The quantities measured and recorded in the Jar Test include pH and NTU (Nephelometric Turbidity Unit). However, the parameter measured in this study is pH. pH is an important parameter for determining acid or base levels in water. The pH of water produced by PT Hanarida Tirta is around >7. The appropriate pH will increase the efficiency of water treatment by reducing turbidity and solute content. Based on the results of jar-test testing, the provision of chemicals, namely aluminum sulfate, can reduce the pH value of raw water levels at PT Hanarida Tirta Birawa with a decrease of 5%. These results indicate that the PH value with the addition of coagulants has met the SNI 698911.2019 standard. The existence of an optimal dose in the use of aluminum sulfate can reduce potential health risks due to excessive coagulant use. Keywords: Jar-test, coagulant, pH.

EFEKTIVITAS ALUMUNIUM SULFAT DALAM MENGURANGI KEKERUHAN AIR PADA UJI JAR TEST PT. HANARIDA TIRTA BIRAWA SIDOARJO: Kata Kunci: Air, Turbidity, Jar test Ella, Isbatus Sabillah; Adiono, Muchammad; Suaebah, Evi; Rohmawati, Lydia
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p21-26

Turbidity adalah ukuran dari tingkat kejernihan atau kekotoran air, yang disebabkan oleh partikel-partikel tersuspensi yang ada di dalamnya. Pengujian Turbidity dapat dilakukan melalui proses Jar test. Jar test adalah metode uji laboratorium yang digunakan dalam pengolahan air untuk menentukan dosis bahan kimia (seperti koagulan dan flokulan) yang optimal, dengan tujuan untuk menghilangkan partikel tersuspensi dan bahan organik yang menyebabkan kekeruhan dalam air. Dalam proses Jar test, terdapat tiga tahapan utama yang penting, yaitu koagulasi, flokulasi, dan sedimentasi. Ketiga tahapan ini merupakan langkah penting dalam menghilangkan partikel tersuspensi, bahan organik, dan kotoran lainnya dari air. Turbidity air pada konsentrasi optimum 90 ppm yang diperoleh setelah penambahan Alumunium Sulfat Al2(SO4)3 memenuhi standar kualitas air minum berdasarkan Permenkes RI No. 492/MENKES/X/2010 yang sesuai sistem manajemen baku mutu ISO 9001:2015 dan standar baku mutu air baku yang digunakan yaitu Peraturan Pemerintah RI No.22 Tahun 2021 tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup. Kata Kunci: Air, Turbidity, Jar test Abstract Turbidity is a measure of the level of clarity or dirtiness of water, caused by suspended particles in it. Turbidity testing can be done through the Jar test process. Jar test is a laboratory test method used in water treatment to determine the optimal dosage of chemicals (such as coagulants and flocculants), with the aim of removing suspended particles and organic matter that cause turbidity in water. In the Jar test process, there are three main stages that are important, namely coagulation, flocculation, and sedimentation. These three stages are important steps in removing suspended particles, organic matter, and other impurities from water. The turbidity of water at an optimum concentration of 90 ppm obtained after the addition of Aluminum Sulfate Al2(SO4)3 meets the drinking water quality standards based on the Regulation of the Minister of Health of the Republic of Indonesia No. 492/MENKES/X/2010 which is in accordance with the ISO 9001:2015 quality standard management system and the raw water quality standard used is Government Regulation of the Republic of Indonesia No. 22 of 2021 concerning the Implementation of Environmental Protection and Management. Keywords: Water, Turbidity, Jar test

Pelatihan Pembuatan Alat Peraga Termofisika Dan Pemodelan Percobaan Stirling Bagi Guru-Guru Fisika SMA Fahmi, Muhammad Nurul; Realita, Arie; Suaebah, Evi; Prastowo, Tjipto; madlazim, Madlazim; Sya'roni, Imam
Journal of Dedication in Community Vol. 1 No. 2 (2023)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA) Universitas Negeri Surabaya (UNESA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jodic.v1n2.p23-28

Studi ini mengevaluasi pelatihan pembuatan alat peraga termodinamika dan pemodelan percobaan Stirling bagi guru-guru Sekolah Menengah Atas (SMA) Kabupaten Tuban dengan tujuan memperkaya metode pembelajaran Fisika. Proses pelatihan berjalan efektif, memungkinkan guru-guru untuk memahami dan menerapkan pengetahuan teori dan praktik secara optimal. Hasil evaluasi mengungkapkan tingginya tingkat keberhasilan pelatihan, yang dibuktikan dari hasil rata-rata total persentase sebesar 81,56%. Integrasi pendekatan dari teori dengan praktik dalam metode pembelajaran memberikan implikasi positif, mendukung efektivitas pembelajaran di kelas, dan diharapkan dapat meningkatkan pemahaman dan minat siswa terhadap konsep-konsep Fisika secara interaktif. Penelitian ini berpotensi membantu para guru untuk dapat mengintegrasikan alat peraga termodinamika dalam proses pembelajaran Fisika tingkat SMA.

Batik Jumputan goes to Taiwan: Utilizing natural dyes to preserve local wisdom Putri, Nugrahani Primary; Munasir, Munasir; Kusumawati, Diah Hari; Suaebah, Evi
Journal of Dedication in Community Vol. 2 No. 2 (2024)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA) Universitas Negeri Surabaya (UNESA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jodic.v2n2.p8-16

This community service aims to introduce the local wisdom of Indonesia, especially typical Indonesian plants that can be used as natural dyes. The object of this activity is Indonesian students who study and live in Taiwan. In addition to introducing local wisdom, the community service team also intends to increase interest in learning science through training in making natural dyes. From the preparations that have been made, the team has succeeded in making natural dyes of yellow, red, and green. It has succeeded in making a video tutorial on making batik Jumputan with natural dyes. The batik Jumputan material was brought as training material on July 5, 2024, at NCU, Taoyuan, Taiwan, with participants from PPI Taiwan members and native Taiwanese students. The training participants were enthusiastic about the activities carried out, as evidenced by the positive response to this activity.

UJI KUALITAS FISIK GALON BARU DI PT. TIRTA INVESTAMA PABRIK KEBONCANDI: Kata Kunci: drop test, uji dimensi, uji ketebalan, uji visualisasi Asti, Yu'thiika; Suaebah, Evi
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p85-91

Air merupakan sumber air minum yang esensial untuk mendukung kesehatan dan kelangsungan hidup manusia, mengingat sebagian besar tubuh manusia terdiri dari cairan. PT. Tirta Investama Pabrik Keboncandi, sebagai salah satu industri Air Minum Dalam Kemasan (AMDK) terkemuka di Indonesia, berkomitmen untuk memproduksi air minum berkualitas. Kualitas menjadi aspek krusial yang diperhatikan oleh konsumen saat memilih produk, dan pengendalian kualitas menjadi langkah utama untuk memastikan bahwa produk AMDK tetap sesuai dengan standar yang telah ditetapkan. Artikel ini membahas pengujian kualitas, khususnya pada fisik galon baru sebagai kemasan utama AMDK. Metode pengujian dilaksanakan pada September 2023 di PT. Tirta Investama Pabrik Keboncandi, melibatkan empat tahap pengujian yakni drop test, uji dimensi, uji ketebalan, dan uji visualisasi. Sebagai sumber informasi komprehensif, artikel ini memberikan pemahaman lebih lanjut tentang proses pengendalian kualitas produk AMDK. Kata Kunci: drop test, uji dimensi, uji ketebalan, uji visualisasi Abstract Water is an essential source of drinking water to support human health and survival, considering that a significant portion of the human body consists of fluids. PT. Tirta Investama Pabrik Keboncandi, as one of the leading Packaged Drinking Water Industries (AMDK) in Indonesia, is committed to producing quality drinking water. Quality is a crucial aspect observed by consumers when choosing a product, and quality control is a primary step to ensure that AMDK products comply with established standards. This article discusses quality testing, particularly on the physical aspects of new gallon packaging in AMDK. The testing method was conducted in September 2023 at PT. Tirta Investama Pabrik Keboncandi, involving four stages of testing: drop test, dimensional test, thickness test, and visualization test. As a comprehensive source of information, this article provides a deeper understanding of the AMDK product quality control process. Keywords: drop test, dimensional test, thickness test, visualization test

ANALISIS KARAKTERISTIK KOMPOSIT PULP KERTAS DAN SERABUT KELAPA UNTUK PEMBUATAN BAHAN BAKU KERTAS RAMAH LINGKUNGAN Pratiwi; Rohmawati, Lydia; Suaebah, Evi
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p141-151

Abstrak Penelitian ini bertujuan untuk menganalisis karakteristik komposit pulp kertas daur ulang dan serat kelapa sebagai bahan baku pembuatan kertas ramah lingkungan. Proses penelitian mencakup persiapan pulp kertas dari kertas bekas dan serat kelapa yang diproses menjadi serbuk, yang kemudian dicampur dengan berbagai rasio massa (0:100, 20:80, 30:70, dan 40:60). Pengujian dilakukan untuk mengukur tebal, gramatur, daya serap air, dan kekuatan tarik kertas dengan mengacu pada standar (SNI 7274:2008) dan (SNI-ISO-1924-2-2016). Hasil uji tebal kertas menunjukkan bahwa perbedaan rasio massa tidak memberikan pengaruh signifikan terhadap tebal kertas, sebagian besar hasil komposit memiliki tebal rata-rata 0.13 mm. Pengujian selanjutnya berupa uji gramatur yang memberikan hasil sebesar 108 – 200 g/mm2, dari dua uji tersebut dapat digunakan untuk menghitung nilai bulk kertas. Hasil perhitungan bulk kertas menyatakan bahwa semua sampel telah memenuhi standart (SNI 7274:2008) yang memiliki nilai dibawah 1.5 cm3/gr. Komposisi serat kelapa dan pulp kertas (20:80) pada penelitian ini memiliki kuat tarik sebesar 2.73 kN/m dan daya regang 1.37% menjadi pilihan komposisi rasio paling optimal sesuai standar (SNI-ISO-1924-2-2016). Penambahan serat kelapa pada pulp kertas dapat meningkatkan kekuatan tarik melalui efek penguatan, sedangkan pada rasio serat yang lebih tinggi (>30), terjadi penurunan kualitas akibat distribusi serat yang tidak merata dan ikatan yang lemah dalam pulp kertas. Dengan demikian, hasil penelitian ini dapat dijadikan alternatif produk kertas daur ulang yang ekonomis yang memiliki karakteristik yang sesuai dengan standar yang telah ditentukan. Abstract This study aims to analyze the characteristics of recycled paper pulp and coconut fiber composites as raw materials for environmentally friendly paper production. The research process includes the preparation of paper pulp from waste paper and coconut fibers processed into powder, which is then mixed in various mass ratios (0:100, 20:80, 30:70, and 40:60). Tests were conducted to measure the thickness, grammage, water absorption, and tensile strength of the paper, referring to the standards (SNI 7274:2008) and (SNI-ISO-1924-2-2016). The paper thickness test results indicate that variations in mass ratio do not significantly affect the paper thickness, with most composite samples having an average thickness of 0.13 mm. The grammage test results ranged from 108 to 200 g/mm², and these two tests were used to calculate the paper bulk value. The bulk calculation results show that all samples met the SNI 7274:2008 standard, which requires a bulk value below 1.5 cm³/g. The 20:80 composition of coconut fiber and paper pulp in this study exhibited a tensile strength of 2.73 kN/m and an elongation of 1.37%, making it the most optimal ratio according to the SNI-ISO-1924-2-2016 standard. The addition of coconut fiber to paper pulp enhances tensile strength through a reinforcement effect, while higher fiber ratios (>30) result in a decline in quality due to uneven fiber distribution and weak bonding within the paper pulp. Therefore, the findings of this study provide an economical alternative for recycled paper products that meet the specified standards.

ANALISIS RESPON LAPISAN TIPIS POLIANILIN TERHADAP AROMA KUNYIT Rahayu, Erfina Nur; Putri, Nugrahani Primary; Suaebah, Evi
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p163-170

AbstrakPenelitian ini telah berhasil mengeksplorasi potensi polianilin (PANI) sebagai material sensor, khususnya untuk aplikasi sensor aroma. PANI disentesis menggunakan metode elektrodeposisi untuk menghasilkan lapisan tipis yang terdeposisi pada permukaan kaca konduktif ITO. Lapisan tipis PANI kemudian dikarakterisasi untuk mengetahui performanya dalam mendeteksi aroma kunyit melalui perubahan nilai resistansi ketika berinteraksi dengan aroma kunyit. Data resistansi yang diperoleh dianalisis untuk menentukan sensitivitas, repeatabilitas, waktu respon, dan waktu pemulihan sensor. Untuk volume essential oil kunyit yang digunakan dalam pengujian adalah 0,5 ml. Hasil pengujian menunjukkan bahwa nilai sensitivitas PANI dalam mendeteksi aroma kunyit yaitu sebesar 7,64%. PANI juga menunjukkan repeatabilitas yang baik dalam mendeteksi aroma kunyit, karena nilai resistansi bisa kembali ke titik resistansi awal, selain itu dihasilkan waktu respon sebesar 152 s dan waktu pemulihan 130 s. Berdasarkan hasil penelitian dapat disimpulkan bahwa PANI menujukkan performa yang baik dalam mendeteksi aroma kunyit sehingga berpotensi untuk dikembangkan sebagai material sensor fungsional. AbstractThis study successfully explored the potential of polyaniline (PANI) as a sensor material, particularly for aroma sensor applications. PANI was synthesized using the electrodeposition method to produce a thin film deposited on the surface of conductive ITO glass. The PANI thin film was then characterized to evaluate its performance in detecting turmeric aroma through changes in resistance upon interaction with the aroma. The obtained resistance data were analyzed to determine the sensor's sensitivity, repeatability, response time, and recovery time. The volume of turmeric essential oil used in the test was 0.5 mL. The results showed that the sensitivity of PANI in detecting turmeric aroma was 7,64%. PANI also demonstrated good repeatability in detecting the aroma, as the resistance values were able to return to their initial point. In addition, a response time of 152 seconds and a recovery time of 130 seconds were obtained. Based on these findings, it can be concluded that PANI exhibits good performance in detecting turmeric aroma and has strong potential to be developed as a functional sensor material.

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