Garuda - Garba Rujukan Digital

Conversion of Glycerol to Ethanol by Integrating Ultrasonic and Ni/ZSM-5 Catalyst Devi Indrasari Mustopa Putri; Sumari Sumari; Handoko Darmokoesomo; Ganden Supriyanto; Nur Arief Nugroho
Eksergi Vol 20, No 1 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i1.8167

The increased production of biodiesel which is used as an alternative fuel has led to an increase in the by-product in the form of glycerol. This glycerol byproduct can be utilized by converting it into other compounds such as ethanol. The production of ethanol from glycerol requires a catalyst that can break down the molecular size of glycerol, one of which is zeolite. One type of zeolite that is good to use is ZSM-5, because this type of zeolite has a high degree of thermal stability, acid stability and selectivity. The catalytic properties of ZSM-5 can be improved by impregnating metals from the transition group, in this study using Ni (nickel). The results obtained that the catalyst Ni/ZSM-5 has a total acidity value of 0.920 mmol/g and has a specific surface area of 138.754 m2/g. The highest ethanol product was produced at 4 hours of sonication, which was 20.362%.

Pemanfaatan Teknologi Digital sebagai Media Pembelajaran untuk Guru SMA-SMP Muhammadiyah Gresik Alfa Akustia Widati; Fatiha Khairunnisa; Satya Candra Wibawa Sakti; Ganden Supriyanto; Mochamad Zakki Fahmi; Imam Siswanto; Hartati Hartati; Ali Rohman
Bubungan Tinggi: Jurnal Pengabdian Masyarakat Vol 5, No 2 (2023)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/btjpm.v5i2.6873

Guru mempunyai kewajiban besar memastikan anak didik memahami materi pelajaran. Namun, waktu belajar di kelas yang terbatas dan beragamnya kemampuan siswa menyebabkan metode pembelajaran tatap muka di kelas menjadi kurang efektif dalam meningkatkan pemahaman siswa. Tantangan dunia pendidikan menuntut guru harus memiliki kompetensi penguasaan teknologi digital. Video pembelajaran yang disajikan secara virtual adalah salah satu metode pembelajaran efektif untuk siswa. Oleh karena itu, guru seyogyanya memiliki kemampuan membuat video digital secara mandiri. Pengenalan jenis teknologi digital, instalasi dan penggunaan aplikasi pembuatan video telah dilakukan ke 45 orang Guru SMP-SMA Muhammadiyah Gresik pada tanggal 21 Juni 2022 untuk meningkatkan kompetensi guru terhadap pemanfaatan teknologi digital dalam pembelajaran. Metode pelaksanaan kegiatan meliputi pemberian materi oleh tenaga ahli, praktik peserta didampingi oleh mentor, dan pembuatan video secara mandiri. Berdasar hasil analisis nilai pre-test dan post-test saat kegiatan, terdapat peningkatan nilai peserta dari sebelum pelatihan (pre-test) adalah 76,8 dan setelah mengikuti pelatihan (post-test), nilai peserta menjadi 97,2. Peserta mendapatkan peningkatan pemahaman dalam membuat video pembelajaran yang ditunjukkan dengan hasil karya video pembelajaran yang dibuat secara individu oleh peserta. Video pembelajaran yang dihasilkan peserta juga telah memenuhi kriteria video digital yang baik. Data evaluasi kegiatan menunjukkan workshop ini diperlukan dan tepat sasaran untuk pengembangan profesional khususnya Guru SMP-SMA Muhammadiyah Gresik. Konsep kegiatan juga sesuai untuk menyelesaikan permasalahan yang ada di pendidikan tingkat SMP-SMA. Dengan demikian, pelatihan ini berhasil meningkatkan kompetensi peserta tentang penggunaan video dan teknologi digital sebagai salah satu inovasi pembelajaran.Teachers are responsible for ensuring students catch on to the subject matter. However, the limited study time in class and students' varying abilities cause face-to-face learning methods to be less effective in increasing student understanding. The global challenge of education demands teachers become competent in digital mastering technology. Learning videos that are presented virtually are an effective learning method for students. Consequently, teachers should have the ability to make digital videos independently. This study introduced digital technology types, installation, and video-making applications for teachers in Muhammadiyah's junior and senior high schools in Gresik (SMP-SMA Muhammadiyah Gresik) on June 21, 2022, increasing teacher competency in using digital technology in learning. The implementation method includes providing material by experts, having participants practice accompanied by mentors, and making videos independently. Based on the analysis of the pre-test and post-test scores during the activity, there was an increase in the participant's score from before the training (pre-test), which was 76.8. After participating in the training (post-test), the participant scored 97.2. Participants gain an increased understanding of making learning videos, as shown by the results of learning videos made individually by participants. The learning videos produced by the participants also met the criteria for good digital videos. Activity evaluation data show that this workshop is necessary and right on target for professional development, especially for SMP-SMA Muhammadiyah Gresik Teachers. The activity concept is also suitable for solving problems in junior high school level education. Thus, this training succeeded in increasing the competence of participants regarding the use of video and digital technology as one of the learning innovations.

The Dependence of Boron Concentration in Diamond Electrode for Ciprofloxacin Electrochemical Sensor Application Ilmi Nur Indriani Savitri; Prastika Krisma Jiwanti; Ilmanda Zalzabhila Danistya Putri; Irkham Irkham; Yasuaki Einaga; Ganden Supriyanto; Yew Hoong Wong; Sachin Kumar Srivastava; Che Azurahanim Che Abdullah
Indonesian Journal of Chemistry Vol 23, No 3 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.82135

This study investigates the effects of boron concentration on boron-doped diamond (BDD) electrodes for electrochemical sensors of ciprofloxacin. The effects of boron concentration, scan rate, and pH of BDD electrodes with boron concentrations of 0.1, 0.5, and 1% were examined to determine the optimal conditions. Furthermore, square wave voltammetry (SWV) in phosphate buffer pH 7 was used to analyze the electrochemical behavior of ciprofloxacin. The results revealed a linear calibration curve in the concentration range of 30–100 μM with a recovery of 85–110%. Meanwhile, BDD electrode with the highest boron concentration in this experiment (1%) showed a very low limit of detection of 0.17 μM, meaning that 1% BDD gave a highly sensitive and significant measurement result for the electrochemical sensor of ciprofloxacin. With the results given, this study provides new insights for controlling boron concentrations in diamond electrodes for the electrochemical sensors of quinolone antibiotics.

Rapid Colorimetric Sensor Based on Gold Nanoparticles Functionalized 4-Amino-3-hydrazino-5-mercapto-1,2,4-triazole for Cortisol Detection in Saliva Sample Hanim Istatik Badi'ah; Ni Nyoman Tri Puspaningsih; Ganden Supriyanto; Nasronudin Nasronudin
Indonesian Journal of Chemistry Vol 23, No 4 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.80874

The rapid, simple, and selective colorimetric sensing method of cortisol has been successfully developed using AuNPs modified with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AuNPs-AHMT). The principle of this method is based on the color change from wine red to purple (redshift) when AuNPs-AHMT interacts with cortisol. The hydrogen bonding between the hydroxyl group from cortisol and the amine group from AHMT induces the aggregation of AuNPs. The modification of the AuNPs surface with AHMT aims to increase its stability. The properties of AuNPs and AuNPs-AHMT were characterized by UV-vis spectrophotometer. The interaction between AuNPs-AHMT and cortisol was studied by UV-vis and FTIR spectroscopies. The proposed method was optimized and validated. Au(III) was reduced to AuNPs at an optimum NaBH4 concentration of 1.0 mM. Validation of the proposed method showed good analytical performance with linearity from 1.0–50.0 nM, accuracy 91.07–102.77%, intra-day precision < 2.22% and inter-day precision < 2.17%, detection limit 0.76 nM, quantification limit 2.54 nM, and sensitivity 0.0112 nM/mL. The proposed method also showed good selectivity with the presence of some interferences in the sample. The proposed method was successfully applied for the determination of cortisol in the saliva by the standard addition method with acceptable recovery.

Applying Fluorescence Dissolved Organic Matter Spectra and Phytoplankton Biology Index for Assessing Urban River Quality Okik Hendriyanto Cahyonugroho; Sucipto Hariyanto; Ganden Supriyanto
Journal of Mathematical and Fundamental Sciences Vol. 54 No. 3 (2023)
Publisher : Directorate for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2023.54.3.3

The relationship between phytoplankton dynamics and dissolved organic matter (DOM) in aquatic systems based on fluorophore organic matter properties results in poor implementation of methods for water quality monitoring. This study aimed to investigate the relation between fluorophore organic matter and phytoplankton index and to estimate the phytoplankton index by fluorescent organic components for water quality assessment. The research was conducted by sampling urban river water, followed by measuring the biological phytoplankton index and dissolved organic matter during the wet and dry seasons. Fluorescence Excitation Emission Matrices (FEEMs) analysis combined with Parallel Factor (PARAFAC) analysis identified three main components of the fluorescence organic matter, i.e., a fulvic acid-like component (C1) and humic acid-like components (C2 and C3), in the aquatic system, whether in the dry season or the wet season. C1 was mainly generated by phytoplankton species, i.e., Nitzschia sp., Plectonema sp., Navicula sp., and Pinnularia sp., and C2 and C3 had a less signiﬁcant relationship with phytoplankton species. The diversity of Bacillariophyta had a stronger contribution to the release of DOM than the diversity of Cyanobacteria. The abundance index of a particular phytoplankton species can be used to determine the organic components of FEEM-derived fluorescence organic matter.

Penyisihan Ion Logam Cr(VI) dari Larutan Menggunakan Biosorben Berbasis Limbah Pertanian Bagase Sorgum Teraktivasi NaOH Mustopa Putri, Devi Indrasari; Darmokoesomo, Handoko; Supriyanto, Ganden; Female, Navillah Zahro; Widyaningrum, Bernadeta Ayu
Eksergi Vol 21, No 2 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i2.10783

Kontaminasi logam kromium sangat berbahaya bagi lingkungan perairan yang terjadi melalui aktivitas industri. Saat ini penyisihan logam kromium dalam perairan banyak dipelajari untuk mengurangi tingkat toksisitasnya. Pada penelitian ini, limbah pertanian bagase sorgum yang diaktivasi dengan NaOH digunakan untuk mengadsorpsi ion logam Cr(VI) dalam larutan. Bagase sorgum teraktivasi NaOH dikarakterisasi menggunakan uji pHpzc, FT-IR, SEM-EDX, XRD, dan metode BET untuk menganalisis gugus fungsi, morfologi permukaan, luas permukaan, serta ukuran pori pada material. Menggunakan sistem batch, parameter adsorpsi seperti massa adsorben, waktu kontak, konsentrasi awal ion logam, pH, dan suhu larutan diamati. Adsorpsi Cr(VI) memiliki kondisi optimum pada pH 2, waktu kontak 70 menit, massa adsorben 900 mg, konsentrasi awal larutan 10 mg/L, dan suhu larutan 30 °C. Persentase kapasitas adsorpsi maksimum yang diperoleh adalah 99,03%. Model orde dua semu cocok untuk mengidentifikasi kinetika adsorpsi ion Cr(VI). Model isoterm adsorpsi ion Cr(VI) sesuai dengan model Freundlich. Energi bebas Gibbs diperoleh nilai positif dan entalpi memiliki nilai negatif, hal ini menunjukkan bahwa adsorpsi ion Cr(VI) merupakan proses eksotermik. Oleh karena itu, upaya pengurangan kadar ion logam Cr(VI) di lingkungan perairan menggunakan adsorben bagase sorgum teraktivasi NaOH dapat dijadikan sebagai alternatif baru dengan perlakuan yang mudah dan bersifat ekonomis.

COMMUNITY DEVELOPMENT THROUGH EDUCATION ON THE PROCESSING OF HOUSEHOLD WASTE INTO COMMERCIAL PRODUCTS Widati, Alfa Akustia; Adiarto, Tokok; Zakki Fahmi, Mochamad; Budi Prasetyo, Antonius; Darmokoesoemo, Handoko; Supriyanto, Ganden; Sumarsih, Sri; Purwaningsih, Aning; Khasanah, Miratul; Hartati, Hartati; Baktir, Afaf; Hadi, Sofijan; Purkan, Purkan; Raharjo, Yanuardi; Khairunnisa, Fatiha; A'yuni, Qurrota; Tri Puspaningsih, Ni Nyoman; Hwei Voon, Lee
Jurnal Layanan Masyarakat (Journal of Public Services) Vol. 8 No. 3 (2024): JURNAL LAYANAN MASYARAKAT
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jlm.v8i3.2024.329-338

Community empowerment and household waste processing are two issues that need to be resolved by the government. An independent and educated society is an important pillar to support the development of country. Meanwhile, waste that continues to accumulate without processing has a negative impact on health and the environment. Public education about household waste processing can be a solution to the two problems above. Education was carried out at Junior High School YBPK Surabaya and residents of Dukuh Kupang Surabaya, and other participants who joined in a hibrid meeting with a total of 116 participants. Activities at YBPK Surabaya took place on 25 March and 5 August 2023 and activities at Dukuh Kupang Surabaya took place on 27 May and 26 August 2023. The types of waste processed are organic waste and used cooking oil, which are then converted into eco-enzymes and used cooking oil Activities are divided into 2 stages. there are community education activities and program sustainability monitoring activities. The community education activities includes presentation and workshop were hold in March 2023 at YBPK Surabaya Middle School and May 2023 at Dukuh Kupang Surabaya. The evaluation of sustainability program including individual practice and monitoring of activities was carried out in August 2023 at Dukuh Kupang Surabaya. Methods for implementing activities include presentation, practice accompanied by a mentor, individual practice, and monitoring program sustainability. Based on the analysis of participants' ability, the participant scores before and after the activity was increase. It means that this training succeeded in increasing participants' knowledge and skills in processing waste, especially organic waste and used cooking oil waste. A total of 72 out of 116 participants (62%) had processed household waste either individually or in groups. Activity evaluation data shows that these activities are necessary and on target to create an independent and creative society.

Penyisihan Ion Logam Cr(VI) dari Larutan Menggunakan Biosorben Berbasis Limbah Pertanian Bagase Sorgum Teraktivasi NaOH Mustopa Putri, Devi Indrasari; Darmokoesomo, Handoko; Supriyanto, Ganden; Female, Navillah Zahro; Widyaningrum, Bernadeta Ayu
Eksergi Vol 21 No 2 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i2.10783

Kontaminasi logam kromium sangat berbahaya bagi lingkungan perairan yang terjadi melalui aktivitas industri. Saat ini penyisihan logam kromium dalam perairan banyak dipelajari untuk mengurangi tingkat toksisitasnya. Pada penelitian ini, limbah pertanian bagase sorgum yang diaktivasi dengan NaOH digunakan untuk mengadsorpsi ion logam Cr(VI) dalam larutan. Bagase sorgum teraktivasi NaOH dikarakterisasi menggunakan uji pHpzc, FT-IR, SEM-EDX, XRD, dan metode BET untuk menganalisis gugus fungsi, morfologi permukaan, luas permukaan, serta ukuran pori pada material. Menggunakan sistem batch, parameter adsorpsi seperti massa adsorben, waktu kontak, konsentrasi awal ion logam, pH, dan suhu larutan diamati. Adsorpsi Cr(VI) memiliki kondisi optimum pada pH 2, waktu kontak 70 menit, massa adsorben 900 mg, konsentrasi awal larutan 10 mg/L, dan suhu larutan 30 °C. Persentase kapasitas adsorpsi maksimum yang diperoleh adalah 99,03%. Model orde dua semu cocok untuk mengidentifikasi kinetika adsorpsi ion Cr(VI). Model isoterm adsorpsi ion Cr(VI) sesuai dengan model Freundlich. Energi bebas Gibbs diperoleh nilai positif dan entalpi memiliki nilai negatif, hal ini menunjukkan bahwa adsorpsi ion Cr(VI) merupakan proses eksotermik. Oleh karena itu, upaya pengurangan kadar ion logam Cr(VI) di lingkungan perairan menggunakan adsorben bagase sorgum teraktivasi NaOH dapat dijadikan sebagai alternatif baru dengan perlakuan yang mudah dan bersifat ekonomis.

Increasing Production, Improving Product Quality, and Empowering the Cracker Entrepreneur Group in Ngelom Pesantren Village A'yuni, Qurrota; Widati, Alfa Akustia; Raharjo, Yanuardi; Pudjiastuti, Pratiwi; Adiarto, Tokok; Harsini, Muji; Prasetyo, A. Budi; Supriyanto, Ganden; Darmokoesoemo, Handoko; Izzah, Adiba Naila; Haula', Hamizah; Hermawan, Hamzah Hilmy; Rizqullah, Almaysh Haidar
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 12 No. 1 (2026): Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.12.1.139-150

This community service aims to assist by disseminating technology related to production equipment, which will help increase both the quantity and quality of products. Additionally, the program offers training on oil quality and teaches how to process waste cooking oil into soap. This community service activity is a way to achieve SDGs in the Decent Work and Economic Growth category through Small Entrepreneur and the Rural Economy. The activities were held in Ngelom Pesantren Village from April until September 2023 to overcome the priority problems that exist in the cracker entrepreneur group. The participants of this activity were a group of cracker entrepreneurs in Ngelom Pesantren Village, totaling 30 participants. Activities were carried out through research methods, workshops, and procurement of tools to improve the production process and quality of cracker products. The workshop topics covered halal certification of food products, oil quality standards, and making soap from waste cooking oil. The survey results showed that participants had a satisfaction level of 92% towards the activities and 93% towards the procurement of tools provided, and the production increased by 202.78%. In addition, the crackers are less greasy and the packaging is well-sealed, which can improve the quality of cracker products.

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