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Sri Benti Etika
Universitas Negeri Padang
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Sintesis Senyawa C-Vanillin Kaliks[4]resorsinarena dan Uji Aplikasinya sebagai Adsorben Ion Fe³⁺: Studi Optimasi pH Afifah, Nurul; Etika, Sri Benti
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6632

Abstract

This study is driven by the need for selective and efficient adsorbent materials to address heavy metal ion contamination, particularly Fe³⁺, in aquatic environments. The aim of this research is to synthesize C-vanillin calix[4]resorcinarene and evaluate its potential as an adsorbent for Fe³⁺ ions, with a specific focus on optimizing pH as a key parameter in the adsorption process. The compound was synthesized via a reflux method, yielding a solid product weighing 3.9726 grams. Structural characterization was performed using Thin-Layer Chromatography (TLC), FTIR spectroscopy, and melting point analysis. TLC results showed a single spot for each compound, indicating high purity. The FTIR spectrum confirmed the presence of characteristic functional groups, with absorption bands at 3355 cm⁻¹ (O–H), 1605 cm⁻¹ (aromatic C=C), 1426 cm⁻¹ (C–H), and 1211 cm⁻¹ (C–O). The high melting point range of 383–384 °C suggests thermal stability and the formation of a new structure. Adsorption tests for Fe³⁺ ions were conducted across a pH range of 1–6, revealing increased adsorption efficiency with rising pH and a maximum value of 1.9015 mg/g at pH 5. A decline in efficiency was observed at pH 6. The study concludes that C-vanillin calix[4]resorcinarene demonstrates promising selectivity and efficiency as an Fe³⁺ ion adsorbent under specific pH conditions and possesses physicochemical properties conducive to practical applications in water purification.
Pengaruh pH dan Waktu Kontak Adsorpsi Rhodamin B terhadap Ekstrak Pekat Flavonoid dari Kulit Rambutan (Nephelium lappaceum) Manalu, Silvani Indriani; Etika, Sri Benti
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6744

Abstract

Water pollution caused by industrial waste containing synthetic dyes such as Rhodamine B poses a serious threat to aquatic ecosystems and human health. One effective and cost-efficient method of treatment is the batch adsorption process, known for its operational simplicity and economic feasibility. This study aims to evaluate the potential of flavonoid extract as a biosorbent for Rhodamine B removal, and to determine the optimum pH, contact time, and adsorption capacity of the system. Flavonoid extract was selected due to its hydroxyl and carbonyl functional groups, which actively contribute to the adsorption process. The results indicate that the optimum pH is 3, with an adsorption capacity of 4.63710 mg/g, while the optimum contact time was reached at 60 minutes, achieving a maximum adsorption capacity of 21.59455 mg/g. These findings demonstrate that flavonoid extract, particularly derived from rambutan peel, has promising potential as a natural biosorbent for mitigating Rhodamine B contamination in aquatic environments.
Optimasi pH dan Waktu Kontak dalam Adsorpsi Methylene Blue dengan Ekstrak Kulit Rambutan Sridevitri, Sridevitri; Etika, Sri Benti
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6822

Abstract

The development of the textile industry in Indonesia produces hazardous waste, including toxic, carcinogenic, non-biodegradable Methylene Blue, which threatens aquatic ecosystems and human health. Adsorption is a simple and low-cost method widely used to reduce this pollution. This study aims to determine the effectiveness of flavonoid extracts from rambutan peel (Nephelium lappaceum L.) in adsorbing Methylene Blue, identify optimal adsorption conditions, and assess adsorption capacity. Analysis of the flavonoid extract using FTIR showed absorption peaks at 3265.13 cm-1 indicating O-H, at 2971.20 cm-1 indicating aliphatic C-H, and at 2280-2080 cm -1 detected C≡C or C≡N, at 1703.06 cm -1, C=O is detected at wavenumbers 1607.35 and 1519.01 cm-1, aromatic C=C is detected at wavenumbers 1446.51 and 1287.45 cm-1, C-O-C is detected at wavenumbers 1186.59 cm -1 detection of C-O-C or C-O-H bending at wavenumbers 874.50 and 751.93 cm-1 detection of aromatic C-H. The adsorption of Methylene Blue by flavonoid extracts is more consistent with the Langmuir isotherm, with a coefficient of determination (R) value of 0.996. The results of the study showed that the optimum conditions for Methylene Blue absorption occurred at pH 5 at 10.4825876 mg/g and at the optimum contact time of 80 minutes at 10.9669 mg/g.
Analisis Proksimat pada Batubara (Ash Content) di Laboratorium PT Superintending Company of Indonesia (SUCOFINDO) Cabang Padang Salsabila, Salsabila; Etika, Sri Benti
MASALIQ Vol 5 No 5 (2025): SEPTEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i5.7502

Abstract

Indonesia possesses economically valuable coal deposits distributed across the Tertiary basins of the western Sunda Shelf, particularly on the islands of Sumatra and Kalimantan, positioning the country as one of the world’s leading coal producers. This study aims to determine the ash content of coal samples from various mining sites. Samples were analyzed using the proximate analysis method to measure parameters including total moisture (TM), inherent moisture (IM), ash content (ASG), and fixed carbon (FC). This method enables the identification of variations in coal characteristics resulting from differences in mining origins. The results indicate that TM, IM, ASG, and FC levels vary across samples, reflecting differences in geological conditions and coal quality. The total moisture and fixed carbon values obtained from crucible 1 and crucible 2 were both recorded at 6%. The study concludes that coal characteristics differ by source, and proximate analysis provides a valuable preliminary insight into quality assessment. These findings serve as a foundation for developing more accurate and efficient coal analysis methods and offer a reference for industrial applications and energy research.
Uji Aktivitas Antioksidan dari Ekstrak Kubis Ungu (Brassica oleracea) Putri, Dafnesy Rahmadhani; Etika, Sri Benti
MASALIQ Vol 5 No 6 (2025): NOVEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i6.7780

Abstract

Unhealthy lifestyles and environmental conditions have become key contributors to the increased production of free radicals in the body, which are linked to the development of various degenerative diseases. To counteract these effects, the body requires antioxidant compounds capable of neutralizing free radicals. Brassica oleracea (purple cabbage) is a vegetable known to contain bioactive compounds, particularly flavonoids, with potential as natural antioxidants. This study aims to determine the antioxidant activity of concentrated purple cabbage extract. The DPPH (2,2-diphenyl-1-picrylhydrazyl) method was employed, with extraction carried out through maceration using methanol as the solvent. Antioxidant activity was tested at various concentrations to determine the IC₅₀ value. The results showed that purple cabbage extract exhibited moderate antioxidant activity, with an IC₅₀ value of 144.170 mg/L. These findings indicate that purple cabbage holds promise as a natural antioxidant source, with potential applications in functional food and pharmaceutical development.
Pelatihan Pembuatan Pupuk Organik Cair Limbah Bawang Merah di Nagari Sungai Nanam Hesty Parbuntari; Siska Alicia Farma; Revi Ernanda; Mahmud Mahmud; Sri Benti Etika; Fitri Yuranda; Anwar Saputra; Yulia Rahmatika
ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 7 No 3 (2025): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/abdi.v7i3.1171

Abstract

Limbah kulit bawang merah yang banyak dibuang oleh petani bisa dimanfaatkan kembali menjadi bahan utama pembuatan Pupuk Organik Cair (POC). Hal ini dikarenakan kulit umbi bawang merah berisi senyawa baik yang dapat berperan sebagai Zat Pengatur Tumbuh (ZPT) ataupun pertumbuhan akar. Ketika masa panen, selama proses penyeleksian bawang merah yang baik dan besar juga dihasilkan limbah berupa kulit dan daun kering yang banyak jumlahnya. Limbah tersebut juga belum dimanfaatkan dan dibuang begitu saja oleh masyarakat karena masih dianggap sampah. Untuk mengatasi masalah ini, tim pengabdi melakukan beberapa tahapan seperti uji skala laboratorium yang dilakukan di laboratorium kimia Universitas Negeri Padang untuk mengetahui zat aktif apa saja yang terkandung dalam POC kulit bawang merah, pemaparan materi oleh narasumber berpengalaman, praktek langsung oleh peserta, monitoring, dan evaluasi yang dilakukan dua kali setelah praktek pembuatan pupuk dan setelah penyemprotan pupuk ke tanaman. Semua tahapan pengabdian ini berlangsung sekitar 8 bulan. Berdasarkan hasil angket yang diberikan kepada mitra, 100% mitra setuju bahwa pelatihan ini bermanfaat dan apabila mereka menggunakan POC maka biaya pembelian pupuk dapat ditekan hingga 50 – 80%. Berdasarkan hasil wawancara langsung, mitra memanfaatkan pupuk yang mereka hasilkan dari kegiatan ini dan menyampaikan bahwa pertumbuhan bawang menunjukkan hasil yang serupa jika dibandingkan dengan ketika mereka menggunakan pupuk komersil. Selain itu, masalah pencemaran lingkungan pascapanen dapat teratasi yang artinya pertanian ramah lingkungan dapat terwujud.
Co-Authors Alfarisi, Fadil Ananda Putra Andriati Fitria Wati Annisa Dewi Pangestuti Anshar Al Khairi, Varel Anwar Saputra Ayunda, Sarah Bahrizal Bahrizal Budhi Oktavia Budhi Oktavia Citra Devira Deni Marlina Deski Beri Desy Kurniawati Desy Kurniawati Desy Kurniawaty Dewi Fortuna Khairil Dewi Kristina Dwi Finna Syolendra DWI RAMADHANI Edi Nasra Elfanny Delvia Endang Widaya Nengsih Fadhila, Dina Fitri Yuranda Hardianti, Amirah Salsabila Hary Sanjaya Hesty Parbuntari Indah Nulfia Indang Dewata Iryani Iryani Iryani Iryani Iswendi Iswendi Ivana Putri Laura Dwi Rha Hayu Mahmud Mahmud Mahmud Mahmud Manalu, Silvani Indriani MARIAM ULFAH ULFAH Melisa Yolanda Minda Azhar Muhammad Afif Muhammad Farhan Mulia, Melindra Nazulis Z Nivi Suci Kurnia Niza Lian Pernadi Nizar, Umar Kalmar Pernadi, Niza Lian Putri Diana Putri, Dafnesy Rahmadhani R, Yoanatul Hasanah Rahmi, Fathaniah Raviqa Rani Aulia Suhanah Rani Aulia Suhanah Regi Fadila Putra Revi Ernanda Ridho Hermawan Rido Ardianto Riga Riga Riga, Riga Rini Anggraini Rita Sundari Sabrina, Joya Salsabila Safitri Salsabila, Salsabila Sintha Hafizhah Yonel Siska Oktariza Sri Teguh Priharti Sridevitri, Sridevitri Suryelita . Suryelita, Suryelita Susiyati Safitri Syamsi Aini Teuku Muhamad Khairudin Trisna Kumala Sari Ulfah, Mariam Umar Kalmar Nizar Utami, Esssylia Afriyanti Varel Anshar Al Khairi Vinezia Sri Wahyuni Yogi Fernanda Saputra Yulia Rahmatika Yusmaita, Eka Yustini Ma’aruf