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Mulia, Melindra
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PENGARUH UKURAN PARTIKEL DAN KECEPATAN PENGADUKAN TERHADAP PENYERAPAN ION LOGAM CU (II) MENGGUNAKAN BIOSORBEN KULIT MATOA (POMETIA PINNATA) Patricia, Popi; Kurniawati, Desy; Nasra, Edi; Mulia, Melindra
CHEDS: Journal of Chemistry, Education, and Science Vol 8, No 2 (2024)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v8i2.9637

Abstract

Pencemaran air oleh logam berat merupakan masalah lingkungan utama yang harus segera diatasi. Salah satu logam berat yang berbahaya adalah logam tembaga (Cu). Pencemaran logam berat pada ekosistem perairan menimbulkan risiko kesehatan yang besar bagi manusia dan membahayakan ekosistem. Hal ini dapat diatasi dengan biosorpsi menggunakan biosorben berupa bahan biologis dari limbah perkebunan. Kulit matoa dapat dimanfaatkan sebagai biosorben karena mengandung gugus fungsi seperti karboksil dan hidroksil yang dapat berikatan dengan ion logam. Penelitian ini bertujuan untuk mengetahui ukuran partikel dan kecepatan pengadukan yang optimum dengan biosorben kulit matoa yang diimobilisasi natrium silika yang diharapkan dapat meningkatkan reaktivitas gugus fungsi dan ketahanan ikatan. Dari penelitian yang dilakukan diperoleh kondisi ukuran partikel optimum adalah 250 µm dengan kecepatan pengadukan 150 rpm dengan kapasitas penyerapan ion logam Cu2+ optimum oleh kulit matoa amobilisasi sebesar 13,13 mg/g.
Sintesis dan Karakterisasi Silika Berpori dari Natrium Silikat dan Surfaktan Gelatin Kulit Ikan Tuna Sirip Kuning Thunnus Albacares Anggriani Sirait, Nova; Aini, Syamsi; Zainul, Rahadian; Mulia, Melindra
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v8i2.15112

Abstract

Silika berpori padatan yang memiliki pori-pori berguna dalam bidang kimia seperti katalis, penghantaran obat, sensor, adsorpsi, dan lain sebagainya. Sintesis silika berpori terus dikembangkan dengan menggunakan bahan terbarukan seperti gelatin. Saat ini peneliti menggunakan natrium silikat sebagai prekursor dengan mempelajari penggunaan surfaktan berupa gelatin dari 2% kulit ikan tuna sebagai bahan pengarah struktur menggunakan metode sol gel. Hasil FTIR pada gelatin kulit ikan tuna menunjukkan adanya 4 daerah serapan pada struktur gelatin yaitu Amida A, Amida I, Amida II Amida III. Karakterisasi XRD ST 2% yang dihasilkan merupakan kristal kristobalit dengan intensitas puncak tajam pada 2? = 21-36°. Karakterisasi SEM ST 2% menunjukkan morfologi berbentuk batang bercabang.
Pengaruh Suhu Kalasinasi Pada Sintesis dan Karakterisi SnO2 Menggunakan Metode Sol-gel Husna, Nurul; Sanjaya, Hary; Budiman, Septian; Mulia, Melindra
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Energi listrik memengaruhi pertumbuhan ekonomi dan kesejahteraan masyarakat secara signifikan. Sementara cadangan energi seperti gas bumi dan minyak semakin menipis, permintaan akan energi listrik terus meningkat. Mengeksplorasi sumber daya dan teknologi baru dan memperluas penggunaan teknologi listrik terbarukan saat ini diperlukan untuk mengantisipasi kondisi yang akan terjadi. salah satunya dengan menggunakan bahan semikonduktor dalam hal penggunaan energi alternatif dari sel surya. Tujuan dari penelitian ini adalah untuk mengetahui bagaimana variasi suhu dan waktu kalsinasi mempengaruhi sintesis SnO2. Dengan menggunakan metode sol-gel, kami menemukan nilai celah pita 3,6 eV selama 4 jam pada suhu 400°C.
Studi Efektivitas Metode Wet Peroxide Oxidation Dalam Mengidentifikasi Mikroplastik Poliamida di Perairan Muara Kota Padang Frida Rahmades, Windi; Dewata, Indang; Mulia, Melindra
Jurnal Pendidikan Tambusai Vol. 9 No. 2 (2025): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i2.30728

Abstract

Sampah plastik di perairan dapat terfragmentasi menjadi mikroplastik berukuran <5 mm, yang berpotensi tertelan oleh organisme air. Poliamida (PA) merupakan jenis mikroplastik yang sering ditemukan di lingkungan perairan. Penelitian ini bertujuan untuk mengidentifikasi mikroplastik PA pada air muara di Kota Padang dengan metode Wet Peroxide Oxidation (WPO). Metode ini dianggap efektif karena lebih murah dan sederhana. Penelitian ini menggunakan variasi suhu pengovenan (70–110°C), konsentrasi Fe2+ (0,025–0,125 M), dan H₂O₂ (10–50%). Identifikasi dilakukan dengan mikroskop dan FTIR. Hasil menunjukkan kondisi optimal pada suhu 90°C, Fe2+ 0,1 M, dan H₂O₂ 20%. Identifikasi FTIR menunjukkan bilangan gelombang khas PA pada 2916, 3293, 1632, dan 1535 cm⁻¹. Tidak ditemukan mikroplastik pada sampel air muara yang diuji, diduga karena faktor lingkungan.
Prevention of Stunting Through the Use of Local Nutritional Food Ingredients in the Family Food Menu in Nagari Katapiang, Batang Anai District, Padang Pariaman Mulia, Melindra
Pelita Eksakta Vol 7 No 1 (2024): Pelita Eksakta, Vol. 7, No. 1
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol7-iss1/234

Abstract

The prevalence rate of stunting in Nagari Katapiang, Bataang Anai District, Padang Pariaman Regency was still very high very. Therefore, is necessary to handle stunting with counseling and training in making additional processed foods made from local ingredients on the family menu. The purpose of implementing this PKM is to improve the health status of children with stunting in Nagari Katapiang. The PKM method is carried out through socialization, training and demonstrations on making additional food preparations based on local food ingredients. The results of this service activity showed that we have successfully provided education on the importance of children's nutrition, training in making processed food from local ingredients. The results obtained are that family partners are able to identify local ingredients that are full of nutrients and are able to process them into family menus. In addition, the partner communities began to be moved by the importance of health and efforts to deal with stunting in children.
Modification Of High-Protein Healthy PMT (Supplementary Feeding) As An Effort To Prevent Stunting And Malnutrition In Nagari Kamang Hilia, Kamang Mudiak District, Agam Mulia, Melindra; Yuniarti, Elsa; Kurniawati, Desy; Stiadi, Della Rosalyna; Gazali, Fauzana; Yuranda, Fitri; Putri, Raisya Pratama; Safitri, Nadila
Pelita Eksakta Vol 8 No 1 (2025): Pelita Eksakta, Vol. 8, No. 1
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol8-iss01/282

Abstract

Stunting is a chronic malnutrition problem caused by inadequate nutritional intake over a long period of time, resulting in impaired optimal physical and cognitive development. The problem of stunting and malnutrition requires coordination between various parties to overcome it. In Agam Regency, especially Nagari Kamang Hilia, the stunting rate is still relatively high, with a prevalence of 24.6%, according to the latest Indonesian Nutrition Status Survey (SSGI). One of the factors influencing this is the high cost of nutritious food, which reduces the interest of mothers in serving healthy menus for the family. Therefore, education and training on nutritious food processing with alternative food sources is needed to increase public understanding. This program targets posyandu cadres and PKK mothers as the main targets, with the aim of providing knowledge about the importance of fulfilling nutrition to prevent stunting and malnutrition. The results of this activity are expected to increase awareness and interest of mothers in processing nutritious food that is attractive and liked by families, especially children.
Processing Used Cooking Oil into Economically Valuable Products as an Effort to Utilize Household Waste for the Istiqomah Majlis Taklim Women in Korong Olo Bangau Nagari Ketaping Batang Anai District Kurniawati, Desy; Dewata, Indang; Fadhilah, Fadhilah; Mulia, Melindra; Ningsih, Sherly Kasuma Warda; Veronita, Silvi; Marlini, Rahmida; Fatmawati, Rani
Pelita Eksakta Vol 8 No 2 (2025): Pelita Eksakta, Vol. 8, No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol8-iss2/315

Abstract

Nagari Ketaping in Batang Anai District has great potential for culinary tourism, especially through traditional fried snack vendors such as sala lauak. However, the extensive use of cooking oil in these activities leads to the generation of used cooking oil (jelantah), which poses serious health and environmental risks. Repeated use of the oil produces free radicals and carcinogenic substances that may cause degenerative diseases, while improper disposal into waterways leads to pollution and ecosystem damage. This community service program aims to educate and raise awareness among members of the majlis taklim in Nagari Ketaping about the dangers of used cooking oil and to demonstrate its potential for conversion into economically valuable products. The main participants are housewives who also operate small fried snack businesses. The outcomes include a scientific publication in Pelita Eksakta Journal (FMIPA UNP), a video documentation, and online media dissemination through Berita Minang.
Potensi Fitokimia Daun Sirsak (Annona muricata L.) dan Daun Kemangi (Ocimum basilicum L.) serta Kombinasinya Ramadhani, Selvia; Mulia, Melindra
TSAQOFAH Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/tsaqofah.v5i4.6577

Abstract

Medicinal plants are species that contain active compounds in part or all of their structures and can be utilized for therapeutic purposes. Soursop (Annona muricata L.) and basil (Ocimum basilicum L.) are two well-known medicinal plants containing secondary metabolites with potential therapeutic effects. This study aims to identify the classes of secondary metabolites present in soursop leaf extract, basil leaf extract, and their combination through phytochemical screening tests. The screening methods involved tests for flavonoids, alkaloids, terpenoids, steroids, saponins, and phenols. The results showed that both soursop and basil leaf extracts tested positive for flavonoids, phenols, steroids, and terpenoids. However, the combined extract only showed the presence of flavonoids and phenols. The differences in secondary metabolite composition in the combined extract suggest potential interactions between compounds that may influence the pharmacological effectiveness of each plant. This research contributes to an initial understanding of phytochemical interactions in combined medicinal plant formulations.
Optimasi Waktu Kontak dan Kecepatan Pengadukan untuk Penyerapan Ion Cu(II) oleh Biosorben Kulit Matoa-CTAB Meissa Lifangrha Ronald; Desy Kurniawati; Melindra Mulia
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.v5i4.6867

Abstract

Industrial waste containing heavy metal ions such as Cu(II) is a major cause of environmental pollution, posing serious risks to human health and ecosystem sustainability. Cu(II) ions are toxic and can lead to neurological disorders, anemia, liver and kidney damage, and even death upon excessive exposure. To address this issue, an efficient, economical, and environmentally friendly method is needed. This study aims to evaluate the ability of matoa peel as a biosorbent for Cu(II) ion removal and to analyze the effect of surface modification using the cationic surfactant Cetyltrimethylammonium Bromide (CTAB). Matoa peel was selected due to its status as agricultural waste rich in active compounds such as flavonoids, tannins, lignin, and cellulose, which contain functional groups effective in binding metal ions. CTAB modification was applied to enhance the number and strength of active adsorption sites. Characterization was conducted using Fourier Transform Infrared Spectroscopy (FTIR) to identify changes in functional groups, while adsorption tests were performed using Atomic Absorption Spectroscopy (AAS) with variations in contact time and stirring speed. The results indicated optimal conditions at 60 minutes of contact time and a stirring speed of 150 rpm, achieving a maximum adsorption capacity of 15.01 mg/g—significantly higher than that of the unmodified biosorbent. In conclusion, CTAB-modified matoa peel significantly enhances the biosorption effectiveness for Cu(II) ions. These findings support the potential use of agricultural waste as a sustainable, cost-effective biosorbent for environmentally friendly industrial wastewater treatment.
Skrining Fitokimia Ekstrak Kombinasi Daun Kecibeling (Strobilanthes crispa (L.) Blume) dan Daun Pepaya (Carica papaya L.) Dedek Fitriani; Melindra Mulia
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.v5i4.6871

Abstract

This study is motivated by the limited research on phytochemical screening of combined medicinal plant extracts, despite the significant potential of this approach in developing more effective and efficient herbal medicines. The objective of this research is to explore the presence of secondary metabolites in a combination extract of kecibeling leaves (Strobilanthes crispa (L.) Blume) and papaya leaves (Carica papaya L.). A qualitative method was employed, with leaf samples purposively collected from the Lima Puluh Kota Regency, West Sumatra. Data were obtained through phytochemical screening tests using specific reagents to detect alkaloids, saponins, flavonoids, tannins, phenolics, triterpenoids, and steroids, and were analyzed descriptively. The results revealed that the combined extract contained saponins, flavonoids, tannins, phenolics, and triterpenoids, while alkaloids and steroids were not detected. These findings support the theory of possible synergistic effects among secondary metabolites in combined extracts, particularly in enhancing the presence of compounds such as tannins that were not identified in single extracts. The study concludes that combining plant extracts can enrich the phytochemical profile. Its implications include contributing to the scientific literature on the potential of local plants and offering practical recommendations for researchers and the herbal industry to consider combination formulations in the development of natural medicinal products. Furthermore, this research opens opportunities for follow-up studies on the pharmacological activity and toxicity of the combined extracts.
Co-Authors Afrizal Afrizal Aini, Syamsi Alizar, Alizar Anggriani Sirait, Nova Azizah Lailatul Nadhifah Bali Yana Fitri Berlian, Syakhinah Boni Saputra Budhi Oktavia Dedek Fitriani DESY KURNIAWATI Desy Kurniawati Desy Kurniawati Devi Purnamasari Dwi Finna Syolendra Edi Nasra Elfanny Delvia Elsa Yuniarti Fadhilah Fadhilah Fatma, Winda Faulina Fatmawati, Rani Fauzana Gazali Frida Rahmades, Windi Hary Sanjaya Hesty Parbuntari Hidayanti, Ermia Indang Dewata Isra Yeni Mai Efdi Marlini, Rahmida Meissa Lifangrha Ronald Niza Lian Pernadi Niza Lian Pernadi Nurul Husna Patricia, Popi Putri, Raisya Pratama Rahadian Zainul Ramadhani, Selvia Rani Aulia Suhanah Riga Riga Riga, Riga Romy Dwipa Yamesa Away Rosmiyani, Tia Safitri, Nadila Sari, Trisna Kumala Septian Budiman Sherly Kasuma Warda Ningsih Sri Benti Etika Stiadi, Della Rosalyna Suryelita . Syamsi Aini Syamsi Aini Teuku Muhamad Khairudin Trisna Kumala Sari Umar Kalmar Nizar Umar Kalmar Nizar Veronita, Silvi Yeni, Isra Yogi Fernanda Saputra Yuranda, Fitri