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Azzahra, Nasya
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Formulasi dan Evaluasi Sabun Cair Pencuci Tangan melalui Pemanfaatan Ekstrak Etanol Kopi Robusta sebagai Antibakteri Abdulloh, Harris; Azzahra, Nasya; Abdulloh, Sudrajat Harris; Hulupi, Mentik
Prosiding Industrial Research Workshop and National Seminar Vol. 16 No. 1 (2025): Vol. 16 No. 1 (2025): Prosiding 16th Industrial Research Workshop and National
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v16i1.6678

Abstract

Penularan bakteri melalui tangan merupakan salah satu jalur utama penyebaran penyakit, sehingga diperlukan inovasi sabun cuci tangan yang tidak hanya membersihkan, tetapi juga bersifat antibakteri. Penelitian ini bertujuan untuk memanfaatkan ekstrak etanol kopi robusta sebagai zat antibakteri pada formulasi sabun cuci tangan terhadap pertumbuhan bakteri Staphylococcus aureus dan Escherichia coli yang sering ditularkan melalui tangan. Sabun diformulasikan dengan penambahan konsentrasi ekstrak 0%, 2%, 4%, dan 6%. Parameter pengujian sediaan sabun meliputi uji berdasarkan SNI-2588-2017 yaitu uji pH, total bahan aktif, bahan tidak larut etanol, alkali bebas, serta tambahan uji viskositas, tinggi busa, stabilitas, dan uji antibakteri. Hasil menunjukkan formulasi sabun dengan penambahan ekstrak etanol kopi robusta belum memenuhi SNI-2588-2017 karena nilai alkali bebas dan bahan tidak larut etanol melebihi batas yang ditentukan. Tetapi ekstrak etanol kopi robusta pada sabun memberikan aktivitas antibakteri terhadap bakteri Staphylococcus aureus dan Escherichia coli dengan kategori kuat dengan aktivitas antibakteri terbaik pada konsentrasi 6%.
Utilization Of Sengon Wood Sawdust Waste as Esterified Cellulose-Based Bioadsorbent for CD(II) Wastewater Purification Fauzan, Rizky; Mujahidah, Nisa Rahmah; Nugraha, Teguh Aditya; Azzahra, Nasya; Paramitha, Tifa; Soeswanto, Bambang; Sihombing, Rony Pasonang
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10650

Abstract

Cadmium (Cd) is a heavy metal with high toxicity that can enter the body through contaminated food chains, so wastewater containing cadmium needs to be treated before being discharged into the environment. This study uses adsorption methods to reduce Cd(II) concentration in artificial wastewater by utilizing modified sengon wood sawdust cellulose as a bioadsorbent. Adsorption tests were conducted in batch mode at room temperature with constant stirring, and the results were analyzed using AAS. The objective of this study was to determine the optimum adsorption conditions using Response Surface Methodology (RSM) and to determine the adsorption capacity of the modified bioadsorbent based on the Freundlich or Langmuir adsorption isotherm models. The variations in bioadsorbent dose in this study were 2, 4, and 6 g/L; adsorption time variations were 30, 60, and 90 minutes; pH variations were 3, 4, and 5. Based on the design expert 13 RSM software, the optimum adsorption conditions for citric acid-modified bioadsorbent are a bioadsorbent dose of 3.957 g/L, time of 31.655 minutes, and pH of 4.968. For the EDTA-modified bioadsorbent, the optimum conditions were a bioadsorbent dose of 3.836 g/L, time of 30 minutes, and pH of 4.708. The results of the adsorption isotherm modeling indicate that the citric acid-modified and EDTA-modified bioadsorbents are more suitable for the Freundlich isotherm model due to their higher determination coefficient (R²). Thus, the adsorption capacities for the citric acid-modified and EDTA-modified bioadsorbents were determined to be 1.7828 mg/g and 1.5776 mg/g, respectively.
Co-Authors Abdulloh, Harris Bambang Soeswanto Fauzan, Rizky Mentik Hulupi Mujahidah, Nisa Rahmah Nugraha, Teguh Aditya Paramitha, Tifa Sihombing, Rony Pasonang Sudrajat Harris Abdulloh