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All Journal Teknika BERKALA SAINSTEK Biology, Medicine, & Natural Product Chemistry KOVALEN: Jurnal Riset Kimia Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) JOURNAL ONLINE OF PHYSICS Jurnal Manajemen & Supervisi Pendidikan Jurnal Penelitian Sains Indonesian Journal of Pure and Applied Chemistry IJEMS (Indonesian Journal of Environmental Management and Sustainability) Share : Journal of Service Learning AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Jurnal Inovasi Teknik Kimia INTEGRITAS : Jurnal Pengabdian Studi Kasus Inovasi Ekonomi Jurnal Abdi Insani Reswara: Jurnal Pengabdian Kepada Masyarakat Hydrogen: Jurnal Kependidikan Kimia CHEDS: Journal of Chemistry, Education, and Science Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan Makara Journal of Technology Jurnal Teknik Terapan (J-TETA) Jurnal Ilmu dan Inovasi Fisika Sainteks: Jurnal Sain dan Teknik Babakti : Journal of Community Engangement Helium: Journal of Science and Applied Chemistry
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Universitas Singaperbangsa Karawang
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Adsorption of Nitrite (NO2-) Using Natural Zeolite and Natural Zeolite Modified with Cetyl Trimethylammonium Bromide (CTAB) Hanan, Ihsan Sofyan; Hakim, Muhammad Fahmi Hakim; Pambudi, Teguh
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 1 (2025): February 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i1.14643

Abstract

Nitrite contamination in water is a critical environmental and public health concern due to its toxicity and persistence. This study investigates the adsorption of nitrite using activated natural zeolite and CTAB-modified zeolite through batch experiments. Natural zeolite was activated with 1M HCl to enhance its surface area, while modification with cetyl trimethylammonium bromide (CTAB) was performed to improve anion adsorption capacity. Adsorption experiments were conducted at different pH levels (2, 4, 6, 8) and contact times (10–90 minutes) using a 100 ppm nitrite solution, with 0.2 g of adsorbent in 50 mL solution. Residual nitrite concentrations were analyzed using UV-Vis spectrophotometry. The results showed that the optimum pH for activated zeolite was 4, with a residual nitrite concentration of 0.108 mg/L, whereas CTAB-modified zeolite performed best at pH 2, reducing nitrite to 0.005 mg/L. The optimal adsorption times were 60 minutes for activated zeolite (0.0106 mg/g) and 75 minutes for CTAB-modified zeolite (0.0156 mg/g). Kinetic analysis indicated that activated zeolite followed a pseudo-first-order model (R² = 0.950), while CTAB-modified zeolite was influenced by intraparticle diffusion (R² = 0.764). These findings highlight the potential of zeolites as efficient and cost-effective adsorbents for nitrite removal in wastewater treatment.
Karakteristik ZnO Nanorod Berstruktur Seperti Landak Sebagai Fotoanoda Pada Dye-Sensitized Solar Cell (DSSC) Yuliasari, Fitri; Aeni, Alfieta Rohmaful; Wahyuningtyas, Aulia; Umam, Hilman Imadul; Perdani, Meka Saima; Pambudi, Teguh; Hidayat, Rahmat
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 8, No 1 (2024)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v8i1.49327

Abstract

Penelitian ini bertujuan membuat sel surya jenis Dye-sensitized solar cell  (DSSC) dengan memanfaatkan ZnO nanorod (ZnO-NR) berstruktur seperti landak sebagai lapisan fotoanoda. Fotoanoda ZnO-NR dibuat dari lapisan penumbuh (seed layer) ZnO nanopartikel (ZnO-NP) diatas substrat ITO menggunakan metode hidrotermal dengan variasi perbandingan konsentrasi larutan penumbuh (growth solution) hexamethylenetetramine (HMTA):Zn(NO3)2·6H2O adalah 0,1 : 0,1 M dan 0,25 : 0,05 M. Morfologi ZnO nanorod dipelajari melalui karakterisasi Scanning Electron Microscopy (SEM) yang menunjukan bahwa penambahan ZnO-NP pada lapisan penumbuh akan menghasilkan ZnO-NR berstruktur seperti landak. Karakterisasi X-Ray Diffraction (XRD) menunjukkan bahwa ZnO-NR menghasilkan pola puncak difraksi yang sesuai dengan bidang ZnO dan berbentuk hexagonal wurzite. Hasil pengukuran Spektroskopi UV-Vis menunjukkan penyerapan dye oleh ZnO-NR pada rentang UV hingga cahaya tampak. Pada penelitian ini pembuatan DSSC difabrikasi dengan struktur ITO/ZnO-NR/D358-dye/mosalyte/Platina/FTO. Parameter-parameter DSSC kemudian dipelajari melalui pengukuran arus-tegangan (I-V) sementara itu rekombinasi muatan yang terjadi, dipelajari melalui karakterisasi Intensity Modulated Photovoltage Spectroscopy (IMVS). Efisiensi yang dihasilkan mencapai 1,65% dari fotoanoda ZnO-NR dengan konsentrasi larutan penumbuh 0,25:0,05 M yang menghasilkan diameter ZnO-NR berukuran lebih kecil sehingga berpotensi meningkatkan penyerapan dye dan memberikan performa DSSC yang lebih baik.
Determination of the Kinetic Parameters of Cholesterol Oxidation using Cholesterol Oxidase from Streptomyces sp. Perdani, Meka Saima; Hermansyah, Heri; Sahlan, Muhamad; Putri, Dwini Normayulisa; Pambudi, Teguh; Hasibuan, Anggi Khairina Hanum
Makara Journal of Technology Vol. 28, No. 3
Publisher : UI Scholars Hub

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Abstract

Cholesterol oxidase (CO) was successfully produced from Streptomyces sp. via the submerged fermentation method, and 69 U/mL enzyme activity was obtained. This study aimed to determine cholesterol oxidation kinetics and the production of CO as a catalyst. The enzyme was diluted to 0.15, 0.075, and 0.00375 U/mL for the oxidation reaction. The substrate was also prepared in three concentrations: 3.23, 6.46, and 12.93 mM. The optimization of conditions for enzymatic cholesterol oxidation was investigated through measurement of the effect of initial cholesterol and enzyme concentrations. Cholesterol concentration was rapidly measured via high-performance liquid chromatography (HPLC). The kinetics of CO were modeled using the first-order irreversible reaction. An enzymatic kinetic model was derived, and it was verified using experimental data and sensitivity analysis. Based on the experiment, the highest enzyme concentrations of crude and commercial CO can oxidize the substrate up to 84% within 240 min. However, the oxidation reaction showed a slightly different behavior in the early 60 min, and crude CO exhibited a slower substrate oxidation. The kinetic rate constant obtained by Euler’s method reached 1.0 x 10−3/min and 1.41 x 10−3/min for 0.15 U/mL crude and commercial CO, respectively.
INOVASI PENGELOLAAN LIMBAH SEKAM PADI MENJADI ARANG BRIKET SEBAGAI SOLUSI ENERGI HIJAU DI DESA KARANGTANJUNG KARAWANG Eri Widianto; Kardiman Kardiman; Farradina Choria Suci; Siswadi Siswadi; Rizal Hanifi; Najla Salsabila; Hilman Imadul Umam; Teguh Pambudi
INTEGRITAS : Jurnal Pengabdian Vol 9 No 2 (2025): AGUSTUS - DESEMBER
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat - Universitas Abdurachman Saleh Situbondo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/integritas.v9i2.7478

Abstract

Karangtanjung Village in Karawang Regency produces a substantial amount of rice husk waste, yet its utilization remains limited, with most of it being disposed of through open burning. This Community Service Program aims to enhance the skills of the Sukamanah II Farmers Group in converting rice husk waste into charcoal briquettes through technical training and the implementation of appropriate technology. The effectiveness of the program was evaluated using pre-test and post-test instruments to assess participants’ knowledge improvement. The results indicate an increase of 27–35% in average scores after the training sessions. The effectiveness analysis using the Normalized Gain (N-Gain) method shows that most participants achieved moderate to high improvement, with N-Gain values ranging from 0.33 to 1.00. Approximately 30–40% of participants reached the high-effectiveness category (N-Gain > 0.7), while the rest fell into the moderate category. These findings confirm that the combination of theoretical introduction, demonstration, and hands-on practice is effective in improving participants’ technical understanding of briquette production. Beyond cognitive improvement, the program also produced tangible outputs, including a briquette press machine and standardized production SOP modules. Early impacts include reduced open burning, increased productivity in biomass utilization, and emerging initiatives to establish a village-level briquette business unit. Overall, this program contributes to strengthening circular economy practices and promoting green energy innovation based on agricultural waste.
PENINGKATAN NILAI GUNA SAMPAH PLASTIK NON EKONOMIS SEBAGAI BAHAN DASAR PEMBUATAN PAVING BLOCK DI TPS3R DESA TELUKJAMBE Kusuma, Anis Mustaghfirin; Bunga, Venny Ulya; Huda, Syamsul; Pambudi, Teguh; Masruroh, Putri; Umam, Hilman Imadul
Jurnal Abdi Insani Vol 12 No 11 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i11.2942

Abstract

Telukjambe Village as an industrial buffer area faces complex waste management problems where only 29% of 1200 tons of daily waste in Karawang is transported to the landfill. This condition causes accumulation of non-economic plastic waste at TPS3R which remains unoptimized and potentially pollutes the environment. This community service activity aims to improve the knowledge and skills of TPS3R operators in processing non-economic plastic waste into paving blocks. The implementation methods include field observation and literature study to identify partner needs. Furthermore, demonstration workshops and hands-on practice of paving block production were conducted with evaluation using pre-test/post-test and N-Gain analysis. The results showed a 74.4% participant participation rate in all practical stages. There was a 26.67% increase in knowledge measured through pre-test and post-test. N-Gain analysis showed 33.3% of participants experienced very significant improvement and 66.7% showed fairly significant improvement. Participant enthusiasm was also very high during the practical sessions as seen from active engagement in discussions. The conclusion indicates that this activity successfully enhanced the capacity of TPS3R operators in processing non-economic plastic waste into economically valuable products. This success is marked by the achievement of knowledge improvement and active participation of participants.
The Catalytic Performance of MnSO4-Doped Natural Zeolite in Ethyl Acetate Synthesis Nugroho, Adelia Natasya Regita; Pambudi, Teguh; Alfieta Rohmaful Aeni; Retno Utami
Helium: Journal of Science and Applied Chemistry Vol. 5 No. 1 (2025): Helium: Journal of Science and Applied Chemistry
Publisher : Study Program of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/helium.v5i1.23

Abstract

Ethyl acetate is a compound that is widely used across various industries. However, its esterification process typically requires a catalyst to improve reaction efficiency. This study focuses on developing a MnSO4-doped natural zeolite catalyst using the impregnation method to enhance its catalytic activity in the esterification of acetic acid and ethanol. The synthesized catalyst was characterized using FTIR, XRD, and SEM-EDS to analyze structural and morphological changes. FTIR characterization revealed the presence of Si-O-Si and Al-O-Si bonds in the 1000 to 1100 cm-1 region, while XRD confirmed that the zeolite with transition metal impregnation shows a decrease in the intensity of the diffraction peak. SEM-EDS analysis demonstrated that the MnSO4-doped natural zeolite exhibited a more uniform morphology, with manganese ions effectively integrated into the surface and pores of the zeolite. Additionally, EDS measurements detected the presence of elements such as Si, O, Al, Na, and Mn, confirming the successful modification of the zeolite to act as a catalyst. Catalytic testing showed that the highest ethyl acetate conversion achieved was 91.27% within 90 minutes, with optimal performance observed at a catalyst mass of 1 g. These findings indicate that modifying zeolite with MnSO4 can significantly enhance catalyst performance in esterification reactions, making it a more efficient and sustainable alternative to conventional catalysts.
IMPLEMENTASI EKONOMI SIRKULAR MELALUI TEKNIK BUDIDAYA MAGGOT DI TPS3R TELUKJAMBE KARAWANG Putri Masruroh; Teguh Pambudi; Venny Ulya Bunga; Hilman Imadul Umam
Studi Kasus Inovasi Ekonomi Vol. 9 No. 02 (2025)
Publisher : Program Studi Manajemen, Fakultas Ekonomi dan Bisnis Universitas Muhammadiyah Malang

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

Abstract

Kapasitas pengelolaan sampah di Kabupaten Karawang tidak memadai disebabkan oleh tingginya volume sampah harian. Dari 1200 ton sampah yang dihasilkan, hanya 350 ton sampah yang bisa diangkut ke Tempat Pembuangan Akhir (TPA). Sisa sampah yang tidak terangkut, diolah di Tempat Pengelolaan Sampah Reuse, Reduce, dan Recycle (TPS3R). Salah satu TPS3R yang ada di Kabupaten Karawang adalah TPS3R BUMDES Berkah Bersama di Desa Telukjambe yang memiliki kapasitas pengolahan sampah rumah tangga sebesar 31,14% dari 8266 kg sampah yang ada. Keterbatasan pengelolaan sampah ini dapat menjadi masalah sosial karena timbunan sampah akan terus bertambah dengan bertambahnya populasi. Untuk itu tim pengabdian dari Fakultas Teknik Universitas Singaperbangsa Karawang telah mengadakan pelatihan pengelolaan sampah rumah tangga, pelatihan pengolahan sampah organik menjadi substrat untuk pakan maggot BSF, pembuatan fasilitas budidaya maggot BSF (rumah lalat, biopond, wadah telur) dan pelatihan tentang manajemen siklus hidup maggot BSF. Sasaran dari kegiatan pengabdian ini adalah petugas TPS3R BUMDES Berkah Bersama mampu melakukan budidaya maggot BSF secara berkelanjutan. Berdasarkan hasil pelatihan, diperoleh nilai rata-rata posttest (66,67) lebih besar dari nilai rata-rata pretest (32). Hasil uji t-berpasangan nilai pretest dan postest berbeda nyata (t=6,98, p< 5%). Hasil ini menunjukkan bahwa pelatihan berpengaruh nyata terhadap pengetahuan petugas TPS3R BUMDES Berkah dalam budidaya maggot BSF.
Studi Kinetika dan Isoterm Adsorpsi Ion Logam Berat Cr(VI) pada Arang Aktif Putri, Dinda Novia Rahayu; Umam, Hilman Imadul; Pambudi, Teguh
Jurnal Teknik Terapan Vol. 5 No. 1 (2026): April
Publisher : P3M Politeknik Negeri Jember

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Abstract

Heavy metal pollution in aquatic systems has become an increasingly significant environmental issue alongside the expansion of industrial activities. Effluents generated from electroplating, leather tanning, metal finishing, and pigment production industries often contain various hazardous heavy metals that pose serious threats to both the environment and human health. One of the heavy metals frequently detected in industrial wastewater is hexavalent chromium (Cr(VI)), which exhibits high toxicity and considerable mobility in aquatic enviroments. This study aimed to evaluate the effectiveness of activated carbon as an adsorbent for the removal of  Cr(VI) ions from aqueous solutions using a batch adsorption method. Operational parameters analyzed included solution pH, adsorbent dosage, and contact time. Chromium concentrations were determined using a UV-Vis spectrophotometer, while the adsorption mechanism was investigated through kinetic and isotherm models. The results indicated that adsorption efficiency increased significantly under acidic conditions, reaching an optimum at pH 2 with an adsorbent dosage of 0.25 g and a contact time of 60 minutes. Kinetic analysis revealed that the adsorption process followed a pseudo-second-order model, suggesting the involvement of chemical interactions between the metal ions and the adsorbent surface. Isotherm analysis demonstrated that the Langmuir model provided a better fit than the Freundlich model, indicating that adsorption occurred in a monolayer configuration on the adsorbent surface. These findings suggest that activated carbon has high potential as an adsorbent material for treating wastewater containing heavy metals, particularly hexavalent chromium.
Studi Optimasi Fotodegradasi Limbah Pestisida Menggunakan Material CaO Melalui Metode Taguchi Aisyah, Andini Nur; Shofie, Auliya; Larrisa, Keisha Ekya; Umam, Hilman Imadul; Pambudi, Teguh
Jurnal Penelitian Sains Vol 28, No 1 (2026)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v28i1.1340

Abstract

Penelitian ini bertujuan untuk menguji kemampuan penggunaan ulang (reusability) katalis CaO, serta menentukan kondisi optimum pada proses fotodegradasi limbah pestisida melalui metode taguchi. CaO disintesis dari cangkang telur melalui kalsinasi pada suhu 800°C dan dikarakterisasi menggunakan SEM, UV-Vis, dan FTIR. CaO yang dihasilkan memiliki morfologi berpori dengan band gap 2,75 eV, serta telah mengalami transformasi dari CaCO₃ menjadi CaO. Uji fotodegradasi dilakukan dengan memvarisikan sumber pencahayaan, meluputi cahaya matahari dan cahaya lampu 100 W. Katalis CaO juga menunjukkan kemampuan reusabilitas yang baik hingga tiga siklus dengan penurunan efisiensi yang tidak signifikan. Optimasi menggunakan metode Taguchi mengidentifikasi waktu iradiasi sebagai faktor paling dominan (88,93%), dengan kondisi optimum pada pH 3, dosis 16 mg, daya 80 W, dan waktu 240 menit menghasilkan efisiensi degradasi prediksi 53,26% uji konfirmasi menunjukkan efisiensi degradasi sebesar 47,21% dengan galat 6,05%. Penelitian ini membuktikan bahwa CaO dari cangkang telur berpotensi sebagai fotokatalis efektif, ekonomis, dan ramah lingkungan untuk pengolahan limbah pestisida.
Fotodegradasi Diazinon Menggunakan Material Fotokatalis CaO Dari Cangkang Telur Dengan Bantuan Paparan Sinar Matahari shofie, Auliya; Hilman Imadul Umam; Teguh Pambudi; Andini Nur Aisyah; Keisha Ekya Larrisa
Jurnal Inovasi Teknik Kimia Vol. 11 No. 1 (2026): JANUARI | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i1.15204

Abstract

The increasing use of pesticides in agriculture contributes to water pollution, particularly from diazinon, a toxic and persistent compound. Photodegradation using waste-based catalysts offers a promising remediation approach. This study aims to synthesize calcium oxide (CaO) from eggshell waste and evaluate its photocatalytic performance for diazinon degradation under sunlight. An experimental method was employed, varying catalyst dosage, pH, initial diazinon concentration, and irradiation time, with degradation efficiency as the response variable. CaO was synthesized via calcination at 800°C, followed by KOH activation. Characterization revealed a porous surface structure with irregular particle distribution and the presence of Ca–O and O–H functional groups. UV–Vis analysis indicated a band gap of 2.75 eV, suggesting activity under solar irradiation. Optimal conditions were achieved at 16 mg catalyst dosage, pH 7, 50 ppm diazinon, and 90 minutes irradiation, yielding 26.41% degradation efficiency. Kinetic analysis followed a pseudo-second-order model (k = 0.0181; R² = 0.9977). These results demonstrate that eggshell-derived CaO is a low-cost, eco-friendly photocatalyst for pesticide wastewater treatment.
Co-Authors Aisyah, Andini Nur Alfieta Rohmaful Aeni Alifa Rahma Zuhri Andini Nur Aisyah ANGGI KHAIRINA HANUM HASIBUAN Anjani, Cindy Salsabilla Armin, Edmund Ucok Asyafa, Amalia Cantika Athirah, Febriana Azhar Aulia Wahyuningtyas Elzandra Imola Vioniken Eri Widianto Fajar Amelia Rachmawati Putri Fajar Amelia Rachmawati Putri Farradina Choria Suci Fauzie, Azis Kemal Fitri Yuliasari Hakim , Muhammad Fahmi Hakim, Muhammad Fahmi Hakim Hakimah Nurjanah Hanan, Ihsan Sofyan Hasti Asfarina Heri Hermansyah Hilman Imadul Umam Kardiman Keisha Ekya Larrisa Kusuma, Anis Mustaghfirin Larrisa, Keisha Ekya Marsah Rahmawati Utami Masruroh, Putri Meka Saima Perdani Meka Saima Perdani Melisa Nur Halimah Mulyani, Sri Najla Salsabila Nanda Aurelia Salsabila S Nanda Aurelia Salsabila S. Nandira, Rantika Sekar Nugroho, Adelia Natasya Regita Nur Fadila, Salsabil Intan Pahlevi, Rio Ramdhan Pangestoe, Safina Handayani Perdani, Meka Saima Perdani, Meka Saiman Putri Masruroh Putri, Dinda Novia Rahayu Putri, Dwini Normayulisa Putri, Fajar Amelia Rachmawati Rahmat Hidayat Rahmatullah, Alzachry Redhaqa Retno Utami Rizal Hanifi SAHLAN, MUHAMAD Salsabila, Riesya Sagita Salsabila Saniatun Wilda Saputro, Agung Nugroho Catur Savitri, Meila Shakila, Tasya Nur Sheryl Ayesha Sheryl Ayesha Bruning Shofie, Auliya Siswadi Siswadi Sonia, Gita Syamsul Huda Venny Ulya Bunga Venny Ulya Bunga Wahyuningtyas, Aulia Widianto, Eri YULIASARI, FITRI Zuhri, Alifa Rahma