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Optimasi Konsentrasi Larutan H2O2 Pada Wet Peroxide Oxidation (WPO) untuk Identifikasi Mikroplastik Polyethylene (PE) Khairi, Jumadil; Dewata, Indang
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Identifikasi mikroplastik dapat dilakukan menggunakan metode ekstraksi dengan penambahan Wet Peroxide Oxidation (WPO) yang memanfaatkan hidrogen peroksida (H2O2) dan katalis Fe2+. Mikroplastik jenis PE banyak ditemukan dalam kehidupan sehari-hari, yang mencemari lingkungan perairan dan berbahaya jika tertelan oleh makhluk hidup. Penelitian ini bertujuan untuk menentukan kondisi optimum dalam metode identifikasi mikroplastik menggunakan WPO dengan memvariasikan konsentrasi larutan H2O2 20%, 25%, 30%, 35%, dan 40%. Hasil dari penelitian ini didapatkan kondisi optimum konsentasi larutan H2O2 pada konsentasi 30%. Karakteriasi mikroplastik menggunakan mikroskop didapatkan bentuk mikroplastik jenis PE yaitu fragment dan fiber. Pengujian menggunakan FTIR terdapat ciri khas gugus fungsi polimer PE yaitu terdapat gugus C-H dan CH2.
Studi Efektivitas Metode Wet Peroxide Oxidation Dalam Mengidentifikasi Mikroplastik Poliamida di Perairan Muara Kota Padang Frida Rahmades, Windi; Dewata, Indang; Mulia, Melindra
Jurnal Pendidikan Tambusai Vol. 9 No. 2 (2025): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i2.30728

Abstract

Sampah plastik di perairan dapat terfragmentasi menjadi mikroplastik berukuran <5 mm, yang berpotensi tertelan oleh organisme air. Poliamida (PA) merupakan jenis mikroplastik yang sering ditemukan di lingkungan perairan. Penelitian ini bertujuan untuk mengidentifikasi mikroplastik PA pada air muara di Kota Padang dengan metode Wet Peroxide Oxidation (WPO). Metode ini dianggap efektif karena lebih murah dan sederhana. Penelitian ini menggunakan variasi suhu pengovenan (70–110°C), konsentrasi Fe2+ (0,025–0,125 M), dan H₂O₂ (10–50%). Identifikasi dilakukan dengan mikroskop dan FTIR. Hasil menunjukkan kondisi optimal pada suhu 90°C, Fe2+ 0,1 M, dan H₂O₂ 20%. Identifikasi FTIR menunjukkan bilangan gelombang khas PA pada 2916, 3293, 1632, dan 1535 cm⁻¹. Tidak ditemukan mikroplastik pada sampel air muara yang diuji, diduga karena faktor lingkungan.
Identifikasi Mikroplastik Jenis Polystyrene (PS) Dengan Metode Wet Peroxide Oxidation (WPO) Pada Perairan Disekitar Pantai Kota Padang Yulia Pertiwi, Sari; Dewata, Indang
Jurnal Pendidikan Tambusai Vol. 9 No. 2 (2025): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i2.30867

Abstract

Pencemaran lingkungan, khususnya di wilayah perairan, menjadi salah satu permasalahan utama di Indonesia. Sampah plastik yang terdegradasi menghasilkan partikel mikroplastik, yakni fragmen plastik berukuran kurang dari lima milimeter. Penelitian ini bertujuan untuk mengidentifikasi keberadaan mikroplastik jenis polistirena (PS) di perairan sekitar Pantai Kota Padang. Metode yang digunakan adalah Wet Peroxide Oxidation (WPO) karena efisien secara biaya dan memiliki prosedur sederhana. Penelitian ini memvariasikan tiga parameter utama, yaitu suhu pengovenan, konsentrasi larutan Fe(II) sebagai katalis, dan konsentrasi H₂O₂ sebagai oksidator. Proses identifikasi dilakukan melalui observasi mikroskopis untuk melihat morfologi partikel serta karakterisasi jenis polimer menggunakan Fourier Transform Infrared Spectroscopy (FTIR). Hasil optimum diperoleh pada suhu 100°C, konsentrasi Fe(II) 0,075 M, dan H₂O₂ 40%. Tidak ditemukan mikroplastik secara signifikan dalam sampel perairan, namun pengamatan mikroskopis menunjukkan morfologi berbentuk foam, sedangkan analisis FTIR mengidentifikasi puncak serapan khas polistirena pada 752,57 cm⁻¹, 2917,87 cm⁻¹, dan 1600,57 cm⁻¹. Nilai ini sangat dekat dengan puncak standar PS, menunjukkan keberhasilan metode WPO dalam proses isolasi dan identifikasi. Metode ini memiliki efektivitas sebesar 98,7%, menandakan bahwa WPO merupakan metode yang efektif untuk deteksi mikroplastik dalam sampel lingkungan perairan.
Development of Guided Discovery Based Stoichiometry E-Modules to Improve Students' Science Literacy Harnas, Dolla Mulyana; Oktavia, Budhi; Azhar, Minda; Dewata, Indang; Pikoli, Masrid
Jurnal Pendidikan MIPA Vol 23, No 3 (2022): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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Abstract

This research aims to create e-modules based on guided discovery learning that are effective, practical, and support student learning. The research type uses research and development (R&D) using a 4-D model with four steps: definition, design, development, and dissemination. This tool is in the form of a questionnaire on effectiveness and feasibility. Elastic modulus is verified by her 6 validators. Data were analyzed according to the Aikens V formula and percent utility. In the analysis of content validity and technical rating, the average V of Aikens with high valid categories was 0.85 and 0.83. Teacher and student ratings of the practicality questionnaire data were 82% and 83% in the highly practical category. Data analysis shows that young's modulus has high validity and practicality. Therefore, it can be concluded that e-modules based on guided discovery learning are effective, practical, and categorized as teaching materials that improve students' scientific literacy.Keywords: e-module, stoichiometry, guided discovery learning, science literacy.
Development of Structured Inquiries-based Live Workssheet with Chemical Representations to Improve Students’ Higher Order Thinking Skills Dewi, Suci Firma; Azhar, Minda; Dewata, Indang; Yerimadesi, Yerimadesi; Sovia, Eka; Nofrianto, Nofrianto
Jurnal Pendidikan MIPA Vol 23, No 3 (2022): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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Abstract

Twenty-first century learning means learning designed for millennials to keep up with modern technology. as a result, it requires students to master four learning skills (4Cs), namely: critical thinking, creativity, communication and collaboration. These four skills support students in the learning process now. This study aims uncover the validity, practicality and effectiveness of structured inquiry-based e-modules that use representation to improve student HOTS. The research means research and development (R&D) and the Plomp development model. The query-based E-Module buffer solution is structured and a 3-layer representation is created based on the Plomp development example, which is divided into 3 stages, namely: preliminary research; prototyping; and the assessment stage. The validity test was analyzed using aiken's V derived formula from which validity will occur obtained 0.85 with the category valid. what will happen is that the structured inquiry-based buffer solution module is valid and easy to use for chemical learners. Keywords: e-modules, buffer solutions, live worksheets, multiple representations, structured inquiry DOI: http://dx.doi.org/10.23960/jpmipa/v23i3.pp792-803
Analysis of Palm Oil Industry Liquid Waste Management at PT. Citra Putra Kebun Asri in South Kalimantan Province Putra, Surya Eka; Barlian, Eri; Syah, Nurhasan; Umar, Iswandi; Dewata, Indang
Jurnal Penelitian Pendidikan IPA Vol 9 No 9 (2023): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i9.5101

Abstract

Oil palm plantations are currently experiencing quite rapid growth; this has resulted in a large number of oil palm fruit processing industriespalm oil (crude palm oil) and palm kernel (palm kernel). The more oil palm fruit that is processed, the more liquid waste it produces. Liquid waste generated during the production process can harm the environment because of the high organic matter contained therein. The purpose of this study was to analyze the management of palm oil industrial wastewater at PT Citra Putra Kebun Asri.The method used in this study is an exploratory method and the collection and testing of data is done by graph sampling. The results of the analysis contained in the palm oil industrial wastewater, namely the pH content ranges from 4-8.5. The content of BOD and COD in the first pool had quite high levels, this was due to (human error) during testing, factory measuring instruments that had not been calibrated and inaccurate sampling by factory staff. While the BOD and COD in the application pond have values ​​that are in accordance with the liquid waste quality standards with BOD values ​​below 100 mh/L and COD values ​​below 250 mg/L
Effectiveness of Acid Mine Water Testing Using Sparing at PT. Bara Alam Utama Herfien; Barlian, Eri; Dewata, Indang; Gusman, Mulya; Efendi, Nur
Jurnal Penelitian Pendidikan IPA Vol 10 No 1 (2024): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i1.5803

Abstract

Sparing is a remote monitoring tool (telemetry) and is carried out in real-time via various different devices, as well as storing and displaying it on many device options. This research uses a quantitative descriptive method, which aims to present data related to the research object. The data sources used in this research consist of primary and secondary data sources. Where primary data is obtained from direct observation and measurements regarding pH values, Total Suspended Solid (TSS), Iron (Fe) and Manganese (Mn) metal content. Secondary data was obtained through literature relevant to the research and documentation during the research. The results obtained in May 2022 were 31.0 and 32.2 mg/l, in November 2022 upstream and downstream, namely 19 and 26.8 mg/l. Meanwhile, the pH value of the water in May 2022 in the upstream river still met The quality book is 6.03, while the pH value in the upstream and downstream rivers is 7.3 and 7.1, while in November 2022 the upstream and downstream pH will be 6.43 and 7.11. The iron (Fe) and manganese content is also relatively small both upstream and downstream, namely in May 0.323 and 0.284 mg/l and in November 2022 0.612 and 0.124. Meanwhile, the results of the river pollution capacity are TSS on the Kungkilan River, namely (28.89 - 36.13 mg/L) and the Lematang River, namely (27.00 - 30.25 mg/L).
Water Quality Analysis in the Batang Ombilin River, Sawahlunto City Monica, Fitrya; Umar, Iswandi; Dewata, Indang; Barlian, Eri
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.6371

Abstract

The decline in water quality is caused by pollution pressure due to low environmental sanitation efforts. Water quality can be determined by carrying out certain tests on the water. This research was conducted on the Batang Ombilin River, Sawahlunto City. This research was conducted in October 2022. This research used survey methods and laboratory test methods. Activities carried out using the survey method are in the form of interviews related to research. Next, laboratory test methods are used to analyze water quality. Interview activities were carried out with people living around the Batang Ombilin River. Respondents were determined using random sampling. Samples were taken of 2 liters of water and carried using plastic bottles. The parameters used to see water quality are TDS, TSS, pH, DO, BOD and COD. Based on research that has been carried out, the results show that 65.25% of respondents stated that the existing water is suitable for consumption but must be filtered and purified first before cooking. Meanwhile, 30.75% of respondents stated that it was not suitable for consumption because the water was cloudy, dirty and smelly. Furthermore, in the water quality analysis, the average value of the TDS parameter was obtained with an average value of 108. TSS obtained an average value of 29.1. The pH got an average value of 8.1. DO got an average score of 7.3. BOD got an average score of 1.4 and COD got an average score of 15.2. From the results of tests carried out at 3 different points, an average value was obtained below the established class 2 water quality standards
Optimizing Digging Equipment Productivity Using Overall Equipment Effectiveness (OEE) Method in Coal Overburden Mining Activities Prabowo, Heri; Hutmi, Rahul; Dewata, Indang
invotek Vol 23 No 2 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i2.1097

Abstract

Coal companies have an overburden stripping production target of 95,000 bcm in January 2022, while the realization of production with the Sumitomo SH 350 LHD excavator and Hitachi Zaxis 350 H excavator is only 77,000 bcm or 82% of the production target. The purpose of this study was to obtain an analysis of the productivity of the Sumitomo SH 350 LHD Excavator (40) and Hitachi Zaxis 350 H Excavator (31) in the overburden stripping activity in January 2022, analyze the obstacle factors that caused the available working hours to be reduced by using the Fishbone diagram method, get an analysis of the Overall Equipment Effectiveness (OEE) value of the Sumitomo SH 350 LHD Excavator (40) and Hitachi Zaxis 350 H (31) Excavator before being optimized, and get the analysis and productivity of the Sumitomo SH 350 LHD Excavator (40) and the Hitachi Zaxis 350 H Excavator (31) which has been optimized with the implementation of Overall Equipment Effectiveness (OEE) to achieve the overburden stripping production target. After analysis and improvement efforts, the total overburden stripping production was 149,000 bcm, which means that it has reached the target and even exceeded the production target of 95,000 bcm/month with the OEE value of the digging equipment of 41% and 43%, respectively. However, the OEE value is still very low compared to the world-class standard OEE value, which is 85% and there is still room for improvement.
STUDY DETERMINATION OF AREA DESIGN OF DOMESTIC WASTE WATER IN THE REGIONAL SQUARE AREA OF KOTO TANGAH PADANG CITY riyanto, sugeng; razak, abdul; dewata, indang
Preventif : Jurnal Kesehatan Masyarakat Vol. 8 No. 2 (2017)
Publisher : Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/preventif.v8i2.96

Abstract

Background & Objective: Management of domestic wastewater to improve access of domestic wastewaterservices that are environmentally friendly, so as to achieve improved quality of life of society and a betterand healthier environment. This study aims to assess the risky areas of residential areas to improve accessand management of domestic waste water in districts Koto Tangah Padang City. Material and Method:This research use cross sectional design. Population and sample of 520 families. Analysis of data usedunivariate and bivariate. Results: The results of this study indicate that 8.74% of the non-accessed latrinesare categorized as having single defecation, 20% have no septic tanks, access to the lowest stool treatmentsystem in Kelurahan Koto Pulai, Batipuh Panjang and Padang Sarai at 37, 5%. 76.95% safe access to latrinesand no secure access in Kelurahan Balai Gadang.Penentuan wastewater area of domestic wastewatersanitation of domestic wastewater components in Kecamatan Koto Tangah Kota Padangyang included in thelevel of very high risk (risk 4) consists of Kelurahan Balai Gadang. Correlation test (p = 0.001) indicate asignificant relationship between education and community income with the support of Jamban and SPALDownership in districts Koto Tangah Padang City. Conclusion: It is necessary to increase the welfare of theprogram that touches directly to the rising public which has implications for the improvement of domesticsewage treatment system facilities.
Co-Authors Abdul Razak Abdul Razak Abdul Razak Afriyani, Ratih Agung Prayitno Ahmad Fasni Ahmad Fauzan Ahmad Juanda Akbarullah Al Asyary Aldri Frinaldi Alfitri Alfitri Ali Amran Alizar, Alizar Alwi Nofriandi Alya Fariani Amini, Aisyah Anaka, Dego Taftazani Ananda Putra Ananda Putra Andromeda Andromeda Annisa, Ananda Suci Aprizon Putra Arif Rahman Hakim Arif Setiawan Arif Setiawan Arman A Aswin, Zeus Marullah Atikah Muthmainnah Aturrahmah, Muthi Audia, Washilla Aulia Azhar Ayu Azizah Azzahra, Nabila Baqi, Ahmad Iqbal Barlin, Eri Berliana Salsabila Budhi Oktavia Budhi Oktavia Budhi Oktavia Catri, Indra Christina Lydia Makmur Damanhuri, Harfiandri Dasman Lanin Dedi Agustanto Dedi Hermon Defriani Dwiyanti, Defriani Deliani, Nur Farida Derjulita, Defika Desy Kurniawati Desy Kurniawati Dewi Fortuna Khairil Dewi Rahmadani Siregar Dewi, Suci Firma Dian Adhetya Arif dian rizky afriani Dinda Tri Pangesti Dipnorita Retno Dolla Mulyana Harnas Donny Fernandez Dwi Marsiska Driptufany Dwi Putri, Vika Trisna Eddy Suratman Edi Nasra Edwin Musdi Egidia Mayendra Eka Putri, Elinda Eka Sovia Elfandra Fadhli Rabbi Elinda Fithriana Elsa Yuniarti Elvinda, Reza Emra, Auliana Endrizal Endrizal Eni Kamal Eri arlian Eri Barlian Eri Berlian Erianjoni Erianjoni Exposto, Levi Anatolia S.M. Fadhilah Fadhilah Fadila Fadila Gusman Fajriah Azra Fajrin Fajrin Fardilla, Midratul Fatma, Winda Faulina Fatmawati Fatmawati Fatmawati, Rani Febrina, Suci Febryanti Febryanti Festiyed Fijri, Annisa Nurul Firya Afra Nisa ‘ Il Islam Fitra Arya Dwi Nugraha Fitri Sadilla Fitri Sadilla Fitri, Marisa Meliana Fitriandoni, Adisty Frida Rahmades, Windi Frinsis Warmansyah Frista, Nada Fuji Astuti Febria Geita Yulyan Firel Gustia Dona Maya Handayuni, Linda Hardeli Hardeli Hardeli Hardeli Hardeli Hardeli Hardeli Hardeli Hari Asri, Hazqan Harika Harika Harmedi Yulian Saputra Harnas, Dolla Mulyana Hary Sanjaya Hary Sanjaya Hary Sanjaya Hary Sanjaya Haryeni Hayati, Neni Fitra Heldi heldi heldi Heldi Heldi, Heldi Henny Yulius Henny Yulius Herfien Heri Prabowo Hidayat S, Syaiful HudaAli, Haflatul Hurriyah Hurriyah Hutmi, Rahul I Made Arnawa Ikhsani, Anugrah Putri Ilahi, Afdal Indra Catri Insani, Munadia Isva Abdul Ghani Iswandi - Umar Iswandi U Jamika, Fadel Ikrar Jelibseda Jelibseda, Jelibseda Jon Efendi Juli Manda Sari Kasma Warni Khairi, Jumadil Kristianto, Aloysius Hari Kurniati Kurniati Kusnanda, Arif Juliari Latifa, Jheni Sriayu Latisma Dj Lindawati Lindawati Lisa Rahayu Lismomon Nata Mahalul Azam Maharani, Indah Kemala Mainita, Yosi Putri Maiyesi Yenti Marlini, Rahmida Maruf, Hidayatul Masrid Pikoli Mawardi Mawardi Mawardi Mawardi Meilindri, Rahmi Aulia Melisa Sri Hardianti Meria Ultra Gusteti Mery Delvina Meuraksa, Irawati Miftahul Khair Minda Azhar Minda Azhar Minda Azhar Minda Azhar Mira Hasti Hasmira Mona Gusfira Monica, Fitrya Monika Yulia Muchtar, Bustari Muhamad Sholichin Muhammad Fajri Muhammad Farhan Muhammad Habibul Ikhsan Muhammad Hidayat Muhammad Hiknul Ikhsan Muhayatul, Muhayatul Mulia, Melindra Mulya Gusman Munadia Insani Mutia Amran Nasution, Rani Sakila Nasyfrizal Carlo Nevy Sandra Niza Lian Pernadi Nizar, Umar Kalmar Nizwardi Azka Nofri Yuhelman Nofrianto Nofrianto Nofrianto Nofrianto Nur Azizah NUR EFENDI Nur Efendi Nurhasan Syah Nurlaeli Rachmawati Koerniawan, Rina NURUL HIDAYAH Oktavia, Elfitri Olivia Oktorie Onasis, Aidil Osronita Osronita Perdani, Agung Sandi Pernadi, Niza Lian Pramesta, Deasycha Novelidia Pudia M. Indika Puja Rizki Bahari Purnama Wirawan Purnama Wirawan Putra, Surya Eka Putri Ayu Rahadian Zainul Rahayu, Youngky Gerre Rahmadani Siregar, Dewi Rahman Rahman Rahmatika, Aljumaatul Rahmi Hidayanti Rahmi, Fathaniah Raviqa Rammadani Yusran Rapitos Sidiq Rasli, Amran Md. Rati, Nurila Rembrandit Rembrandt, Rembrandt Rindi Genesa Hatika Riri Rahmahwati Joni Rismiati Rismiati Robet Triarjunet Romy Dwipa Yamesa Away Rustian, Zikra Putri Ryanda Luthfi Zaim Sabrina, Joya Safitri, Aprilliana Sakdimah Sakdimah Salsabila, Ilham Sandi Perdani, Agung Sandrawati, Neny Sari, Trisna Kumala Sati’at, Nur Anisa Semeidi Husrin Septya Anggraini Serly Mutia Sari Sherly Kasuma Warda Ningsih Sherly Kasuma Warda Ningsih Sinaga, Barita Siregar, Dewi Rahmadani Siti Fatimah Siti Fatimah Skunda Diliarosta Skunda Diliarosta Sovia, Eka Sri Benti Etika Suci Atma Hardika Suci Firma Dewi Sugeng Riyanto Sugriarta, Evino Suhendrinal Suparno . Surya Eka Putra Suryani, Okta Suryelita . Susi Erienti Syafardi, Zulhendra Syafarman Syafri Anwar Syafrijon Syah, Nur Hasan Syamsi Aini Syamsul Amar B Syukria Teguh Widodo Trisna Kumala Sari Try Al Tanto Ulianas, Alizar Ulya Amanda Zeds, Dhea Umar Kalmar Nizar Umar Kalmar Nizar Umar Kalmar Nizar Umar, Genius Umar, Iswandi Veronita, Silvi Vina Novela vira maryati Vivi Chaniasi Wahyu Prasetyo Agus Susanto Wilson Novarino Yani, Akhmad Yaumal Arbi Yerimadesi Yerimadesi Yerimadesi Yerimadesi Yohandri Yollafebrisa Wizul Yollafebrisa Wizul Yudi Antomi Yulia Pertiwi, Sari Yuliana Yuliana Yulkifli Yulkifli Yunhendri Danhas Yusuf . Zul Amri Zuldani, Irwan