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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

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

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.
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.
SUSTAINABLE LIGNIN EXTRACTED FROM BANANA STEM BIOMASS AS A FUNCTIONAL UV-BLOCKING INGREDIENT IN SUNSCREEN Sheryl Ayesha; Nanda Aurelia Salsabila S; Teguh Pambudi; Hasti Asfarina; Hilman Imadul Umam; Fajar Amelia Rachmawati Putri
Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Vol. 8 No. 1 (2026): Literasi Artikel Penelitian Kimia
Publisher : Program Studi Kimia, Fakultas MIPA, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/jc.v8i1.7005

Abstract

Banana stem biomass, an abundant agricultural by-product, contains significant lignin content and offers strong potential for valorization through green extraction technologies. In this study, lignin was extracted using an environmentally friendly Deep Eutectic Solvent (DES) composed of choline chloride and citric acid and subsequently incorporated into sunscreen cream formulations at concentrations of 2%, 3%, and 4%. The photoprotective performance of the formulations was evaluated through UV–Vis spectrophotometry, while pH measurements ensured compliance with SNI 16-4399-1996. FTIR analysis was conducted to compare the structural characteristics of DES-extracted lignin with those obtained using conventional NaOH extraction. The results revealed that all lignin-based formulations effectively absorbed UVA (320–400 nm) and UVB (280–320 nm) radiation, with UV absorbance increasing alongside lignin concentration; the 4% formulation showed the strongest UV-blocking capability. All samples maintained a skin-compatible pH of approximately 6. FTIR spectra further indicated that DES-extracted lignin preserved aromatic structures more effectively than NaOH-extracted lignin. Overall, the findings highlight the potential of banana stem-derived lignin as a natural UV-blocking and antioxidant ingredient for eco-friendly sunscreen products, supporting the advancement of sustainable cosmetic innovation.
Sustainable Valorization of Corncob Residues through Green Lignin Extraction for Functional Sunscreen Applications Teguh Pambudi; Hilman Imadul Umam; Fajar Amelia Rachmawati Putri; Alifa Rahma Zuhri; Nanda Aurelia Salsabila S.; Melisa Nur Halimah; Sheryl Ayesha Bruning; Elzandra Imola Vioniken
Biology, Medicine, & Natural Product Chemistry Vol 15, No 1 (2026)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2026.151.119-125

Abstract

Corncob residues represent an abundant agricultural biomass rich in cellulose, hemicellulose, and lignin. Lignin, an aromatic biopolymer containing benzene and ketone functional groups, exhibits inherent ultraviolet (UV) absorption, positioning it as a promising bio-based ingredient for sustainable sunscreen formulations. In this study, lignin was extracted from corncob residues—comprising 18.5% hemicellulose, 23.5% cellulose, and 16.5% lignin—using a green deep eutectic solvent (DES) system composed of choline chloride and citric acid, and benchmarked against conventional alkaline extraction using NaOH. FTIR analysis revealed attenuated peak intensities in DES-extracted lignin, indicating lower recovery and partial structural alteration relative to the NaOH-derived counterpart. Extraction yields were 10.06% for the DES method and 16.19% for the NaOH method. Sunscreen formulations containing 2%, 3%, and 4% lignin exhibited appreciable UV absorption, particularly within the UVA region, with the highest performance observed at 4% lignin loading. These results highlight the feasibility of valorizing corncob biomass through environmentally benign lignin extraction to produce functional bio-based materials for sustainable sunscreen applications.
Pemanfaatan Limbah Botol Plastik Sebagai Bahan Baku Sapu Lantai Daur Ulang Melalui Kegiatan Workshop dan Analisis Nilai Ekonominya Teguh Pambudi
Babakti: Journal of Community Engangement Vol 1 No 1 (2024): April
Publisher : Fakultas Teknik, Universitas Singaperbangsa Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/babakti.v1i1.13103

Abstract

Telah dilaksanakan kegiatan pelatihan pengolahan sampah botol plastik menjadi sapu daur ulang beserta analisis nilai ekonominya kepada masyarakat Desa Payungsari, Kecamatan Pedes, Kabupaten Karawang. Kegiatan pelatihan tersebut dilaksanakan melalui dua sesi yaitu metode pelatihan terstruktur dan pelatihan partisipatif. Pelatihan terstruktur dilaksanakan melalui sosialisasi jenis dan pemilahan sampah plastik dan pemaparan materi dengan metode ceramah. Selanjutnya pelatihan partisipatif dilaksanakan dengan melakukan kegiatan partisipatif dengan melibatkan peserta dalam pembuatan sapu daur ulang secara langsung oleh fasilitator. Kegiatan pelatihan pembuatan sapu daur ulang botol plastik menjadi salah satu upaya untuk mengurangi masalah sampah di Desa Payungsari. Hasil dari kegiatan ini mampu meningkatkan pengetahuan masyarakat desa mengenai jenis dan pemilahan sampah plastik yang dapat terus dilakukan. Pada kegiatan praktek langsung pembuatan sapu daur ulang, peserta kegiatan mampu meningkatkan keterampilan dan mengetahui nilai-nilai ekonomi yang dikeluarkan dan didapatkan. Untuk mengoptimalkan hasil sosialisasi dan pelatihan, maka perlu didukung dengan media seperti poster yang ditempel di beberapa tempat di lingkungan masyarakat.
Analisis Kesehatan dan Keselamatan Kerja Penggunaan Pestisida Menggunakan Metode ASNZS 4360:2004 dan Job Safety Analysys (JSA) Putri Nur Hasanah; Saniatun Wilda; Natasya Shafira Putri Rahmat; Hilman Imadul Umam; Teguh Pambudi
Jurnal Tekno Global Vol. 15 No. 01
Publisher : UNIVERSITAS INDO GLOBAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36982/jtg.v15i01.6152

Abstract

ABSTRACT The use of pesticides in agricultural activities is still frequently carried out without adequate implementation of occupational safety and health (OSH) procedures, such as incomplete use of personal protective equipment (PPE) and unsafe mixing and spraying practices, which increases the risk of health problems and environmental contamination. Commonly reported health effects include skin irritation, dizziness, muscle pain, respiratory disorders, and musculoskeletal complaints. This study aims to analyze occupational safety and health risks associated with pesticide use among farmers by applying the AS/NZS 4360:2004 risk management method and Job Safety Analysis (JSA). The study employed a qualitative descriptive approach through interviews and direct observations of work activities, including equipment and material preparation, pesticide mixing, spraying, and sprayer tank cleaning. Risk assessment was conducted based on three indicators, namely exposure, probability, and consequence, to determine risk levels and identify appropriate control measures. The results indicate that the preparation stage of equipment and materials is the most critical, with back pain classified as a “Substantial” risk and swollen feet categorized as “Priority 3.” Other work stages were generally classified as “Acceptable,” although the potential for direct pesticide exposure remains a concern. Recommended risk control measures include consistent use of PPE, regular OSH training, and improvements in work procedures to reduce manual handling risks and chemical exposure, thereby supporting safer and more sustainable agricultural practices. Keywords : Occupational Health Risk, K3, Pesticide Use   ABSTRAK Penggunaan pestisida dalam aktivitas pertanian masih banyak dilakukan tanpa penerapan prosedur keselamatan dan kesehatan kerja (K3) yang memadai, seperti ketidaklengkapan alat pelindung diri (APD) serta teknik pencampuran dan penyemprotan yang tidak aman, sehingga meningkatkan risiko gangguan kesehatan dan pencemaran lingkungan. Dampak kesehatan yang sering dilaporkan meliputi iritasi kulit, pusing, nyeri otot, gangguan pernapasan, dan keluhan muskuloskeletal. Penelitian ini bertujuan untuk menganalisis risiko K3 pada penggunaan pestisida oleh petani dengan menggunakan metode AS/NZS 4360:2004 dan Job Safety Analysis (JSA). Penelitian dilaksanakan dengan pendekatan deskriptif kualitatif melalui wawancara dan observasi langsung terhadap tahapan kerja yang meliputi persiapan alat dan bahan, pencampuran pestisida, penyemprotan, serta pencucian tangki semprot. Penilaian risiko dilakukan berdasarkan indikator exposure, probability, dan consequence untuk menentukan tingkat risiko serta kebutuhan pengendalian. Hasil analisis menunjukkan bahwa tahap persiapan alat dan bahan merupakan tahapan paling kritis, dengan risiko nyeri punggung berada pada kategori “Substantial” dan risiko kaki bengkak termasuk kategori “Priority 3.” Sementara itu, tahapan kerja lainnya umumnya berada pada kategori “Acceptable,” meskipun potensi paparan pestisida secara langsung tetap perlu diperhatikan. Upaya pengendalian yang direkomendasikan meliputi penggunaan APD secara konsisten, pelaksanaan pelatihan K3 secara berkala, serta perbaikan prosedur kerja untuk mengurangi risiko pengangkatan manual dan paparan bahan kimia, guna mendukung praktik pertanian yang lebih aman dan berkelanjutan Kata Kunci : Resiko Kesehatan Kerja, K3, Penggunaan Pestisida
Studi Kinetika dan Isoterm Adsorpsi Ion Logam Berat Cr(VI) pada Arang Aktif Dinda Novia Rahayu Putri; Hilman Imadul Umam; Teguh Pambudi
Jurnal Teknik Terapan Vol. 5 No. 1 (2026): April
Publisher : P3M Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/jteta.v5i1.116

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.