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All Journal Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Akta Kimia Indonesia Sains Natural: Journal of Biology and Chemistry PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Amalee: Indonesian Journal of Community Research & Engagement Jurnal Sains dan Edukasi Sains IJCR (Indonesian Journal of Chemical Research) Aptekmas : Jurnal Pengabdian Kepada Masyarakat JURNAL PENGABDIAN PENDIDIKAN MASYARAKAT (JPPM)
Gertreda Latumakulita
Universitas Katolik Widya Mandira
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Sintesis dan Karakterisasi Silika Gel Dari Limbah Batu Akik Asal Desa Nian Kabupaten Timor Tengah Utara Menggunakan Metode Sol Gel Landi Pote, Lodowik; Sanam, Putra Reinho Rosario; Latumakulita, Gertreda
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Volume 7, ISSUE 2, 2022
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol7.iss2.art2

Abstract

Penelitian tentang sintesis dan karakterisasi silika gel dari limbah batu akik asal Desa Nian Kabupaten Timor Tengah Utara menggunakan metode sol gel telah dilakukan. Penelitian ini bertujuan untuk mengetahui komposisi kimia, karakteristik silika gel yang disintesis dari limbah batu akik asal Desa Nian Kabupaten Timor Tengah Utara yang dapat digunakan sebagai sumber sintesis silika gel. Metode penelitian yang digunakan adalah metode sol gel. Penelitian ini diawali dengan pencucian serbuk limbah batu akik dengan HCl 2 M untuk menghilangkan unsur-unsur pengotor. Selanjut ekstraksi silika dilakukan dengan mereaksikan dengan NaOH 3 M untuk memperoleh natrium silikat. Natrium silikat yang diperoleh selanjutnya disintesis menjadi silika gel dengan menambahkan HCl 3 M tetes demi tetes sampai pH netral. Silika gel hasil sintesis dianalisis komposisi dengan XRF dan dikarakterisasi dengan XRD dan FTIR.  Hasil penelitian menunjukkan bahwa komposisi kimia serbuk limbah batu akik dengan XRF diperoleh Si 35,6 % dan kandungan terbesar adalah Ca yaitu 54,3 %. Silika gel hasil sintesis memiliki kemurnian adalah SiO2 99,1 % dan Si 97,6 %. Hasil karakterisasi dengan XRD menunjukkan silika gel hasil sintesis berbentuk fasa amorf dan hasil karakterisasi gugus fungsi dengan FTIR menunjukkan adanya gugus fungsi siloksan dan silanol.
Kinetic and Optimization Study of Green Extraction of Bioactives from Anredera Cordifolia Leaves Latumakulita, Gertreda; Lodowik Landi Pote; Anggelinus Nadut; Juliano M.P. Umbu Jima Kadebu; Amandha V.D. Tukan
Amalee: Indonesian Journal of Community Research and Engagement Vol. 6 No. 2 (2025): Amalee: Indonesian Journal of Community Research and Engagement
Publisher : LP2M INSURI Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37680/amalee.v6i2.8119

Abstract

The sustainable extraction of bioactive compounds from medicinal plants supports environmentally responsible practices in the pharmaceutical and nutraceutical industries. This study investigates the extraction behavior of Anredera cordifolia leaves using green solvents, with a focus on process optimization and kinetic modeling. A factorial design was used to evaluate the effects of temperature (25–60°C), solvent type (ethanol, methanol, water), pH (4, 7, 9), and time (10–90 minutes). Total phenolic content (TPC) and antioxidant activity were measured via spectrophotometry. Kinetic analysis revealed that the pseudo-second-order model provided the best fit to the data (R² > 0.98), indicating chemisorption as the dominant mechanism. Response Surface Methodology (RSM) identified optimal conditions at 59°C, 70% ethanol, pH 7, and 65 minutes, yielding 213.2 mg GAE/g DW TPC and 91.8% antioxidant activity. Compared to conventional methods, this approach improved yield by 21% and reduced solvent use by 30%. These results demonstrate the value of combining kinetic modeling with statistical optimization to create efficient, scalable, and low-impact extraction protocols. Importantly, the findings offer practical relevance for advancing Indonesia’s herbal industry and supporting the development of sustainable biotechnology in tropical regions.
Co-Authors Amandha V.D. Tukan Anggelinus Nadut Anggelinus Nadut Christiani Dewi Q. M. Bulin Dewi Q. M. Bulin, Christiani Gerardus Diri Tukan Grace Rianti Latuheru Guntildis Riantobi Helena Hepa Lengari Juliano M.P. Umbu Jima Kadebu Kadebu, Juliano M. P. Umbu Jima Lalong, Paulus Risan F. Landi Pote, Lodowik Latuheru, Grace Rianti Lengari, Helena Hepa Lodowik Landi Pote Markus Taek, Maximus Munadi Munadi Nadut, Angelinus Sanam, Putra Reinho Rosario Taek, Maximus M Taek, Maximus M. Tukan, Amandha Victoria Dwiputri