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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 Fullerene Journal of Chemistry Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Jurnal Tekno Global 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 Babakti: Journal of Community Engangement Chimica Didactica Acta, Journal of Chemistry and Chemistry Education
Teguh Pambudi
Universitas Singaperbangsa Karawang
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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DEGRADATION OF PERTICIDE WASTE VIA PHOTOCATALYSIS USING CAO UNDER VISIBLE LIGHT IRRADIATION Keisha Ekya Larrisa; Hilman Imadul Umam; Teguh Pambudi; Auliya Shofie; Andini Nur Aisyah
Jurnal Kimia Fullerene Vol 11 No 2: Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v11i2.799

Abstract

Diazinon pesticide pollution aquatic environments serious problem due to its toxic, persistent, and difficult to degrade naturally. One potentially effective approach decompose this compound is the photocatalytic process, which is capable of forming reactive oxidative radicals under light exposure. This study aims evaluate the performance calcium oxide (CaO) derived from eggshell waste photocatalyst in the diazinon photodegradation process using visible light source. The CaO material was prepared through calcination process and then characterized using SEM, FTIR, and UV-Vis to determine surface structure, functional groups, and band gap values that support its photocatalytic activity. The CaO material was prepared through calcination process and then characterized using SEM, FTIR, and UV-Vis to determine the surface structure, functional groups, and band gap values that support photocatalytic activity. The optimum conditions were achieved neutral pH, low initial concentration, and 100 watts of light power with the highest degradation efficiency 49.65%. Kinetic analysis showed the process follows pseudo-first-order model with good agreement with the experimental data. Overall, the results of this study demonstrate that CaO from eggshells has the potential to be used effective, economical, and environmentally friendly photocatalyst in the photodegradation diazinon under visible light exposure, thus becoming alternative technology for pesticide waste treatment.
Adsorpsi Ion NO2- Menggunakan Activated Carbon dan Activated Carbon Termodifikasi Cetyltrimethylammonium Bromide Rio Ramdhan Pahlevi; Teguh Pambudi; Muhammad Fahmi Hakim
TEKNIKA Vol. 19 No. 3 (2025): Teknika September 2025
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.15688577

Abstract

Penelitian ini bertujuan untuk mengkaji efektivitas proses adsorpsi ion nitrit (NO₂⁻) dengan memanfaatkan activated carbon serta activated carbon yang telah dimodifikasi menggunakan surfaktan cetyltrimethylammonium bromide (CTAB). Activated carbon dikenal memiliki struktur berpori dan luas permukaan yang tinggi, menjadikannya adsorben potensial dalam pengolahan air. CTAB, merupakan sebuah surfaktan kationik yang memiliki gugus kepala hidrofilik dan ekor hidrofobik, digunakan dalam modifikasi ini untuk meningkatkan afinitas permukaan activated carbon terhadap ion nitrit melalui perubahan karakteristik permukaan menjadi lebih elektropositif dan hidrofilik. Hasil eksperimen menunjukkan bahwa kondisi optimal untuk activated carbon terjadi pada pH 2 dan waktu kontak selama 60 menit, sementara activated carbon termodifikasi menunjukkan efisiensi maksimum pada pH 6. Kajian kinetika adsorpsi memperlihatkan bahwa model pseudo-orde dua paling sesuai untuk menggambarkan mekanisme interaksi antara adsorben dan adsorbat, menunjukkan adanya proses kimisorpsi. Modifikasi permukaan activated carbon dengan CTAB terbukti meningkatkan kapasitas adsorpsi melalui penguatan interaksi elektrostatik, sehingga berpotensi besar sebagai solusi alternatif dalam pengolahan limbah cair yang terkontaminasi ion NO₂⁻.
COBALT - MODIFIED NATURAL ZEOLITE AS A HETEROGENEOUS CATALYST FOR ETHYL ACETATE SYNTHESIS Retno Utami; Alfieta Rohmaful Aeni; Teguh Pambudi; Adelia Natasya Regita Nugroho
Chimica Didactica Acta Vol. 13 No. 2: December 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jcd.v13i2.44

Abstract

The esterification of acetic acid with ethanol to produce ethyl acetate is an important reaction widely applied in the chemical, pharmaceutical, and food industries. However, this process often results in low conversion when performed without an efficient catalyst, as the reaction is reversible and limited by equilibrium. Therefore, developing a stable and active heterogeneous catalyst is essential to enhance the reaction rate and product yield. This study aims to improve the catalytic performance of natural zeolite through modification with cobalt chloride (CoCl₂) using the wet impregnation method to introduce additional active sites and strengthen surface acidity. The modified cobalt-zeolite catalyst was evaluated in the esterification of acetic acid and ethanol at a temperature of 70 °C under various catalyst loadings ranging from 0,25 to 2 grams and reaction times from 15 to 120 minutes. The catalytic performance was analyzed based on acetic acid conversion obtained from titration analysis. The results showed that cobalt impregnation significantly increased catalytic activity compared to both pure and acid-activated zeolites. The optimum condition was achieved using 1 gram of catalyst with a reaction time of 30 minutes, yielding a maximum acetic acid conversion of 92.24 percent. The enhancement in activity is attributed to the formation of new Lewis acid sites and the increased surface acidity caused by cobalt incorporation into the zeolite framework, which facilitates stronger interactions between the catalyst and reactant molecules. The cobalt-modified zeolite exhibited higher structural stability and superior catalytic efficiency, demonstrating that cobalt acts not only as an active site but also as a structural and acidity modifier. In conclusion, cobalt-modified natural zeolite shows great potential as an effective heterogeneous catalyst for ethyl acetate synthesis. Future work is recommended to investigate the reusability, regeneration capability, and long-term stability of the catalyst for continuous and industrial-scale esterification applications.
Co-Authors Adelia Natasya Regita Nugroho 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 Auliya Shofie Dinda Novia Rahayu Putri 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 Hakimah Nurjanah Hanan, Ihsan Sofyan Hasti Asfarina Heri Hermansyah Hilman Imadul Umam Kardiman Keisha Ekya Larrisa Kusuma, Anis Mustaghfirin Marsah Rahmawati Utami Masruroh, Putri Meka Saima Perdani Meka Saima Perdani Melisa Nur Halimah Muhammad Fahmi Hakim Mulyani, Sri Najla Salsabila Nanda Aurelia Salsabila S Nanda Aurelia Salsabila S. Nandira, Rantika Sekar Natasya Shafira Putri Rahmat Nur Fadila, Salsabil Intan Pangestoe, Safina Handayani Perdani, Meka Saima Perdani, Meka Saiman Putri Masruroh Putri Nur Hasanah Putri, Dwini Normayulisa Putri, Fajar Amelia Rachmawati Rahmat Hidayat Rahmatullah, Alzachry Redhaqa Retno Utami Rio Ramdhan Pahlevi Rizal Hanifi SAHLAN, MUHAMAD Salsabila, Riesya Sagita Salsabila Saniatun Wilda Saputro, Agung Nugroho Catur Savitri, Meila Shakila, Tasya Nur Sheryl Ayesha Sheryl Ayesha Bruning Siswadi Siswadi Sonia, Gita Syamsul Huda Venny Ulya Bunga Venny Ulya Bunga Wahyuningtyas, Aulia Widianto, Eri YULIASARI, FITRI Zuhri, Alifa Rahma