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All Journal Chimica et Natura Acta Walisongo Journal of Chemistry ABDI MOESTOPO: Jurnal Pengabdian pada Masyarakat Jurnal Sains dan Teknologi Jurnal Bakti Nusantara
Siti Mahmudha
Departemen Kimia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary Other

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PENGARUH PENGGUNAAN BENTONIT TERAKTIVASI ASAM SEBAGAI KATALIS TERHADAP PENINGKATAN KANDUNGAN SENYAWA ISOPULEGOL PADA MINYAK SEREH WANGI KABUPATEN GAYO LUES – ACEH Siti Mahmudha; Irwan Nugraha
Chimica et Natura Acta Vol 4, No 3 (2016)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (242.8 KB) | DOI: 10.24198/cna.v4.n3.10921

Abstract

Studi yang bertujuan untuk mengetahui pengaruh penggunaan bentonit teraktivasi asam sebagai katalis terhadap peningkatan kandungan senyawa isopulegol pada minyak sereh wangi Kabupaten Gayo Lues Aceh telah dipelajari. Aktivasi bentonit dilakukan dengan menggunakan larutan H2SO4 0,6 M, HCl 0,5 M dan HNO3 0,1 M. Hasil aktivasi dikarakterisasi menggunakan Fourier Transform Infrared (FT-IR) dan X-Ray Difraction (XRD). Reaksi minyak sereh wangi dengan bentonit alam dan bentonit teraktivasi asam dilakukan selama 30 menit pada suhu 30°C. Produk yang dihasilkan di analisis menggunakan Gas Chromatography-Mass Spectroscopy (GC-MS). Hasil penelitian menunjukkan bahwa penggunaan bentonit berperan sebagai katalis dalam peningkatan  kandungan senyawa isopulegol yang merupakan isolat dari senyawa sitronellal. Sitronellal adalah salah satu senyawa monoterpena yang dapat mengalami reaksi siklisasi dengan katalis homogen dan heterogen. Kandungan isopulegol mengalami peningkatan dari 12,66% menjadi 14,05% pada bentonit alam; 30,11% pada bentonit teraktivasi H2SO4 0, 6M; 32,70% pada bentonit teraktivasi HCl 0,5 M dan 14,34% pada bentonit teraktivasi HNO3 0,1 M.
Digitalisasi Tanaman Obat Keluarga Asman Toga Kencono Wungu Sebagai Sarana Edukasi Masyarakat Desa Kenep Bojonegoro Muhammad Idris; Rony Setianto; Belinda Arbitya Dewi; Norma Winata; Evita Muslimah Isnanda Putri; Rahmawati Rahmawati; Siti Mahmudha
ABDI MOESTOPO: Jurnal Pengabdian Pada Masyarakat Vol 6, No 1 (2023): Januari 2023
Publisher : Universitas Prof. Dr. Moestopo (Beragama)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32509/abdimoestopo.v6i1.2457

Abstract

Keanekaragaman hayati Indonesia sangat melimpah salah satunya adalah pada kelompok tanaman obat keluarga (TOGA). TOGA adalah tanaman yang memiliki khasiat dalam mengobati dan mencegah berbagai jenis penyakit. Dalam kegiatan pengabdian ini TOGA dijadikan sebagai objek pembelajaran bagi masyarakat Desa Kenep melalui wadah Asman Toga Kecono Wungu terkait pentingnya mengetahui jenis dan manfaat TOGA. Metode pengabdian ini dilakukan melalui media digitalisasi dengan pembuatan barcode yang berfungsi merekam link website sekitar 73 jenis tanaman obat keluaraga (TOGA) yang dikelola oleh Stikes Rajekwesi Bojonegoro yang mana website ini bersifat updatable mengikuti perkembangan penelitian ilmiah.Barcode ini nantinya dapat di akses oleh masyarakat melalui smartphone.Hasil kegiatan pengabdian ini mempermudah akses pengetahuan dalam hal ini TOGA, untuk mendapatkan informasi jenis dan manfaat TOGA serta dapat memberikan keahlian sehingga secara mandiri membuat resep obat tradisional sebagai keperluan pengobatan dan pencegahan penyakit. Selain itu masyarakat memiliki kesadaran untuk budidaya tanaman obat secara mandiri di pekarangan rumah.
Analisis Kualitas Air Hygiene Sanitasi Secara Fisika dan Kimia di Perumahan Green View Sunggal Devi Lestari; Imas Masriah; Sulwiyatul Kamariah Sani; Siti Mahmudha; Adelia Yesya Putri Hasibuan
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5309

Abstract

This study analyzed the quality of borehole water in Green View Sunggal Housing located in a rice field area. This research used a descriptive analytical method with a cross-sectional design. Samples were taken from 25 boreholes through a purposive sampling technique divided into three zones: north (8 wells), middle (7 wells), and south (10 wells). The parameters evaluated included physical aspects (temperature, odor, taste, color, turbidity) and chemical aspects (pH, hardness, Fe, Mn, nitrate, nitrite, chloride). Laboratory analysis was carried out at the Medan State Polytechnic following SNI standards and the APHA method, with statistical analysis using SPSS for Pearson correlation and linear regression. The results showed that the majority of parameters met the standards of Permenkes No. 32 of 2017. The parameters of temperature, odor, taste, hardness, manganese, nitrate, nitrite, and chloride reached a compliance level of 100%. However, there were discrepancies in color (92%), turbidity (84%), pH (64%), and iron content (80%). Samples from the southern zone adjacent to rice fields within a 200-meter radius showed significant problems with acidic pH (5.8-6.4) and excessive iron content (1.12-1.42 mg/L). Statistical analysis revealed significant correlations between well depth, distance from rice fields, and water quality. Distance from rice fields was the strongest predictor for nitrate (R² = 0.475) and iron (R² = 0.374). The study concluded that better environmental management is needed to maintain and improve water quality in the residential area.
A Review of Maghemite Nanoparticles as Environmental Sensors Imas Masriah; Devi Lestari; Prisca Caesa Moneteringtyas; Siti Mahmudha; Sulwiyatul Kamariyah Sani
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5354

Abstract

The increasing urgency to monitor and mitigate environmental pollution has driven significant interest in the development of advanced sensing technologies. Nanotechnology presents promising solutions through the application of nanoscale materials, among which maghemite nanoparticles (γ-Fe2O3) have garnered considerable attention due to their unique physicochemical properties, high chemical stability, a large specific surface area, and superparamagnetic behavior, making them suitable for separation, target deployment, and sensor regeneration. It functionalized maghemite nanoparticles to enhance their selectivity toward specific pollutants, including heavy metals ( e.g., Pb2+ and Cd2+) and toxic gases (e.g., NO, NH3, and H2S). These articles present a review of the structural and physicochemical characteristics of maghemite nanoparticles, including commonly applied synthesis methods, sensor mechanism, and their applications in pollutant detection, such as heavy metals and toxic gases. The review also highlights current challenges and outlines future directions for the development of more efficient, affordable, and sustainable maghemite-based sensors for next-generation environmental monitoring systems.
Fitoremediasi In Vitro Logam Pb dan Cu Menggunakan Eceng Gondok (Eichhornia crassipes): Strategi Ramah Lingkungan dan Berkelanjutan Siti Mahmudha; Fajar Nugraha; Muhammad Idris; Imas Masriah; Devi Lestari
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5459

Abstract

Heavy metal contamination, especially by lead (Pb) and copper (Cu), is a major environmental issue in aquatic ecosystems caused by industrial, mining, and agricultural activities. These metals are toxic, persistent, and bioaccumulative, posing risks to aquatic life and human health. Various remediation methods have been developed, including physical, chemical, and biological approaches; however, their effectiveness on a large scale remains limited. This study explores the potential of Eichhornia crassipes (water hyacinth) for in vitro phytoremediation of Pb and Cu. Plants were grown in Hoagland solution containing 100 mg/L of each metal. Metal accumulation in plant tissues was measured using Atomic Absorption Spectroscopy (AAS), and chlorophyll content was analyzed with a UV-Vis spectrophotometer. The results showed that Pb primarily accumulated in the roots, while Cu was more translocated to the leaves. Chlorophyll levels decreased more significantly in Cu-treated plants, indicating higher stress. These findings suggest that E. crassipes is a promising, cost-effective, and environmentally friendly option for the remediation of heavy metal-contaminated waters. The implementation of this technology could contribute to improving environmental quality and reducing the risk of heavy metal exposure to both ecosystems and human health.
Sosialisasi Penggunaan Workbook sebagai Bahan Ajar Pendukung pada Materi Zat Aditif dan Adiktif dalam Pembelajaran IPA Sani, Sulwiyatul Kamariyah; Pangestika, Inten; Mahmudha, Siti; Pratiwi, Pina Budiarti; Sapitri, Shally
Jurnal Bakti Nusantara Vol. 2 No. 3 (2025): Jurnal Bakti Nusantara
Publisher : Pustaka Media Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63763/jbn.v2i3.91

Abstract

Kegiatan sosialisasi penggunaan workbook sebagai bahan ajar pendukung pada materi zat aditif dan adiktif dalam pembelajaran IPA dilaksanakan di SMPN 28 Mukomuko dengan tujuan untuk meningkatkan pemahaman dan keterlibatan siswa dalam proses belajar. Materi zat aditif dan adiktif merupakan salah satu materi yang topik pengetahuannya terlalu luas sehingga membutuhkan pendekatan pembelajaran yang konstektual dan interaktif. Melalui kegiatan ini, siswa-siswi diperkenalkan pada penggunaan workbook yang disusun secara sistematis seperti materi yang spesifik, soal evaluasi yang menarik, serta kumpulan istilah-istilah sains yang dapat digunakan peserta didik sebagai bahan ajar pendukung. Hasil dari sosialisasi menunjukkan bahwa penggunaan workbook dapat mendorong siswa untuk lebih aktif, mandiri, dan kritis dalam memahami materi. Siswa memberikan respon positif terhadap format dan isi workbook, serta menunjukkan minat yang lebih tinggi dalam mengikuti proses pembelajaran yang dibuktikan dengan adanya peningkatan pemahaman siswa terkait materi zat aditif dan adiktif berdasarkan hasil pre-test dan post-test. Kegiatan ini diharapkan menjadi langkah awal dalam penerapan media pembelajaran yang lebih efektif dan dapat menarik minat belajar peserta didik serta dapat meningkatkan kualitas pembelajaran IPA di sekolah.
ADSORPTION KINETICS OF METHYL ORANGE ON SILICA DERIVED FROM GAMALAMA VOLCANIC SOIL Cipta, Indra; Baturante, Nur Jannah; Hernawan, Hernawan; Rombe, Yunita Pare; Mahmudha, Siti
Walisongo Journal of Chemistry Vol. 8 No. 1 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i1.26066

Abstract

Silica gel was successfully synthesized from Gamalama volcanic soil using the sol-gel method and applied as an adsorbent to remove methyl orange (MO) dye. The synthesis process involved treating 20 grams of volcanic soil with 2 M HCl under stirring for 3 hours, followed by a 12-hour soaking period. The solid residue was subsequently filtered, dried, and reacted with 7 M NaOH for 2 hours. The resulting filtrate was neutralized through repeated washing with distilled water, and silica gel formation was achieved by titration with 2 M HCl until a final pH of approximately 3–4 was reached. The synthesized silica was evaluated for its adsorption performance against methyl orange, with optimal conditions identified at pH 4, a contact time of 5 hours, and an adsorbent dosage of 30 mg. UV-Vis analysis showed that the synthesized silica exhibited a higher adsorption capacity (6.7%) compared to raw Gamalama volcanic soil. Kinetic studies indicated that the adsorption process followed a pseudo-second-order model, suggesting chemisorption as the dominant mechanism. The rate constant (k₂) for the synthesized silica was 0.09 M⁻¹·h⁻¹, compared to 0.077 M⁻¹·h⁻¹ for the raw volcanic soil. This indicates that the synthesized silica adsorbed MO more rapidly, likely due to its higher purity and greater availability of active sites. The slightly lower k₂ observed in raw volcanic soil might be attributed to the presence of clay minerals such as halloysite and allophane, which possess negative surface charges at neutral to alkaline pH levels, leading to electrostatic repulsion with the negatively charged MO anions. Silica gel synthesized from Gamalama volcanic soil demonstrates promising potential as an eco-friendly adsorbent for dye removal from aqueous solutions.
Co-Authors Adelia Yesya Putri Hasibuan Baturante, Nur Jannah Belinda Arbitya Dewi Cipta, Indra Devi Lestari evita muslimah isnanda putri Fajar Nugraha Hernawan Hernawan Imas Masriah Irwan Nugraha Muhammad Idris Norma winata Pangestika, Inten Pratiwi, Pina Budiarti Prisca Caesa Moneteringtyas Rahmawati Rahmawati Rombe, Yunita Pare Sapitri, Shally Setianto, Rony Sulwiyatul K Sani