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All Journal SAINSMAT Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Fullerene Journal of Chemistry Seminar Nasional Pengabdian Kepada Masyarakat Indonesian Journal of Fundamental Sciences Venn: Journal of Sustainable Innovation on Education, Mathematics and Natural Sciences Seminar Nasional Hasil Penelitian LP2M UNM Chemedu: Jurnal Ilmiah Pendidikan Kimia SMART: Jurnal Pengabdian Kepada Masyarakat Hayyan Journal SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam
Diana Eka Pratiwi
Universitas Negeri Makassar
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Studi Adsorpsi Logam Fe (III) Menggunakan Koposit Kitin Silika Sekam Padi Muftihatu Rahma; Hasri Hasri; Diana Eka Pratiwi
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 12, No 2 (2023): September
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat122439262023

Abstract

Penelitian ini bertujuan untuk mengetahui pH optimum dan kapasitas adsorpsi logam Fe(III) menggunakan komposit Kitin-silika sekam padi. Metode yang digunakan meliputi pembuatan natrium silikat, pembuatan komposit kitin-silika, penentuan pH optimum dan kapasitas adsorpsi terhadap logam Fe(III). Pembuatan natrium silikat dilakukan dengan pelarutan menggunakan NaOH. Komposit kitin-silika sekam padi dibuat dengan mereaksikan larutan natrium silikat dengan kitin. Karakterisasi komposit kitin-silika meliputi analisis gugus fungsi menggunakan FTIR dan analisis morfologi menggunakan SEM. Proses adsorpsi dilakukan dengan variasi pH (2-6), variasi konsentrasi (50-150 ppm). Hasil penelitian menunjukkan bahwa pH optimum pada adsorpsi logam Fe(III) adalah 4 dengan daya adsorpsi sebesar 91,42%. Kapasitas adsorpsi logam Fe(III) dengan konsentrasi 50, 80, 100 dan 150 ppm berturut-turut adalah 31,49 mg/g; 69,69mg/g; 89,83 mg/g dan 138,57 mg/g. Adsorpsi logam Fe(III) lebih sesuai untuk model isotherm Langmuir dibandingkan dengan Freundlich dengan nilai R2 = 0,9414.Kata kunci : sekam padi, adsorpsi, kitin-silika, isotherm dan logam berat
The Effect Of Acid Treatment On The Characteristics Of Modernite Zeolite Sumiati Side; Suriati Eka Putri; Diana Eka Pratiwi; Aulia Rahma; Abd. Rahman
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 12, No 2 (2023): September
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat122511932023

Abstract

This work investigated the use of acid treatment on the characteristics of zeolite mineral. The effects of treating zeolite with various acid solutions hydrochloric acid (HCl) and sulfuric acid (H2SO4) were measured using x-ray fluorescence (XRF), x-ray diffraction (XRD), and scanning electron microscope (SEM). The results showed an increase in the percentage of SiO2 and Al2O3 after zeolite activation, and also a decrease in the amount of impurities. The crystalline phase of the zeolite was carried out using XRD analysis, indicating the type of zeolite used is modernite. The SiO2 phase in the sample is quartz, and the Al2O3 phase is corundum. The average crystal size decreased after activation, from 14.23 nm to 6.85 nm for HCl and 5.42 nm for H2SO4. Futhermore, the surface morphology of all zeolite samples has a form of irregular spherical surface, and the surface size of the particles after activation shows a smaller particle shape. The results of this study are expected to become recommendations for further research related to natural zeolite pretreatment as a catalyst support.
UJI FITOKIMIA DAN UJI TOKSISITAS SENYAWA METABOLIT SEKUNDER EKSTRAK ETIL ASETAT BATANG KRATOM (Mytragyna Speciosa Korth) Pince Salempa; Gusma Harfiana Abbas; Diana Eka Pratiwi; Muhammad Akbar
Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Vol 24, No 2 (2023): CHEMICA
Publisher : Jurusan Kimia FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/chemica.v24i2.54491

Abstract

Kratom (Mitragyna Speciose Korth) merupakan salah satu jenis tumbuhan potensial yang dapat ditingkatkan nilai kegunaannya, karena sejak dahulu M. Speciosa sudah dimanfaatkan secara tradisional. Penelitian eksplorasi ini bertujuan untuk mengidentifikasi senyawa metabolit sekunder dari ekstrak E asetat batang kratom (Mitragyna Speciosa Korth) yang berasal dari kabupaten Maros, Sulawesi Selatan. Penelitian ini dilakukan dengan beberapa tahap yaitu preparasi sampel, ekstraksi atau maserasi, fraksinasi, dan  Tahapan pengujian berupa fitokimia dan bioaktivitas BSLT (Brine Shrimp Lethality Test). Hasil penelitian yang diperoleh berupa Uji fitokimia ekstrak Etil Asetat Batang  M. Speciosa  mengandung Flavanoid dan Alkaloid menggunakan  pereaksi FeCl3 dan Wegner dan Dragendroff. Adapun nilai  LC50 yang dihasilkan yaitu sebesar 36, 2576  ppm yang menunjukkan bahwa fraksi bersifat toksik
Sintesis dan Karakterisasi Nanokitosan dari Cangkang Kerang Darah (Anadara granosa) dengan Metode Gelasi Ionik Auliya Marwah Hijriyah; Diana Eka Pratiwi; Hasri Hasri; Haryanti Putri Rizal
Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Vol 24, No 2 (2023): CHEMICA
Publisher : Jurusan Kimia FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/chemica.v24i2.56097

Abstract

Pemanfaatan cangkang kerang darah menjadi nanokitosan merupakan salah satu cara untuk memanfaatkan sumber daya alam yang melimpah. Penelitian ini bertujuan mengetahui karakteristik nanokitosan dari cangkang kerang darah dengan metode gelasi ionik. Penelitian ini terdiri dari beberapa tahap yaitu preparasi sampel cangkang kerang darah, pembuatan kitosan melalui tiga tahap yaitu tahap demineralisasi, deproteinasi dan deasetilasi, sintesis nanokitosan menggunakan metode gelasi ionik. Karakterisasi kitosan melalui analisis gugus fungsi menggunakan FTIR dan analisis ukuran menggunakan PSA, dan analisis morfologi dengan SEM. Hasil penelitian menunjukkan bahwa kitosan cangkang kerang darah memiliki derajat deasetilasi sebesar 64%. Hasil analisis FTIR kitosan menunjukkan pada bilangan gelombang 3450,65 cm` terdapat serapan gugus -OH yang tumpang tindih dengan -NH, pada 1643,35 cm' mengindikasikan serapan gugus -C=O yang menunjukkan adanya gugus amida sekunder, pada 1479,40 cm menunjukkan adanya vibrasi regangan -CH, pada 1082,07 cm' mengindikasikan adanya ikatan C-O-C dan pada 873,75 cm' mengindikasikan adanya ikatan B-1,4-glikosidik. Nanokitosan yang diperoleh berbentuk lapisan tipis berwarna putih kekuningan. Hasil karakterisasi PSA menunjukkan bahwa nanokitosan dengan perbandingan volume Kitosan-NaTPP 5:1 berukuran 15,19 nm sedangkan perbandingan 2:1 berukuran 13,64 nm. Hasil karakterisasi dengan SEM menunjukkan bahwa nanokitosan cangkang kerang darah memiliki bentuk bulat.Kata kunci: Nanokitosan, Cangkang Anadara granosa, Gelasi Ionik.
Pelatihan Pembuatan Handsanitizer dari Daun Kemangi pada Kelompok PKK Kelurahan Samata Kecamatan Somba Opu Kabupaten Gowa Suriati Eka Putri; Sumiati Side; Diana Eka Pratiwi; Nita Magfirah Ilyas; Munawwarah Munawwarah
SMART: Jurnal Pengabdian Kepada Masyarakat Vol 3, No 2 (2023): Oktober
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/smart.v3i2.53887

Abstract

Adanya pandemi Covid-19 di akhir tahun 2019 mengubah pola hidup masyarakat di dunia, salah satunya adalah penerapan protokol kesehatan, seperti  memakai masker dan senantiasa menjaga kebersihan. Dengan demikian, salah satu hal yang wajib dibawa jika ingin berpergian adalah hand sanitizer. Pada kegiatan PKM ini akan diberikan pelatihan pembuatan hand sanitizer berbahan dasar daun kemangi. Mitra kegiatan ini adalah Kelompok PKK yang berlokasi di Kelurahan Samata Kecamatan Somba Opu Kabupaten Gowa. Kegiatan PKM ini dilaksanakan melalui tiga tahapan yaitu, peyuluhan terkait kandungan bahan alam, tahap kedua meliputi peragaan (demonstrasi) pembuatan hand sanitizer berbahan dasar daun kemangi, dan dilanjutkan dengan tahap praktek pembuatan hand sanitizer oleh tim bersama dengan mitra. Setelah mengikuti kegiatan ini, seluruh anggota kelompok PKK Keluarahan Samata mampu mengolah daun kemangi menjadi hand sanitizer alami.
Kinetics of Phenol Degradation Using TiO₂/Zeolite Composite Andi Eka Kartika; Sumiati Side; Diana Eka Pratiwi; Nur Afni
Hayyan Journal Vol. 2 No. 3 (2025): October
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v2i3.4138

Abstract

Phenol is a hazardous organic pollutant commonly found in industrial wastewater and is difficult to degrade through conventional treatment methods, thus requiring more effective and sustainable approaches. Photocatalytic degradation using TiO₂ has been widely explored; however, its performance is limited by rapid electron–hole recombination and low surface area. Combining TiO₂ with zeolite enhances adsorption capability and increases the availability of active sites, offering a promising strategy to improve photocatalytic efficiency. This study aims to analyze the kinetic behavior of phenol degradation using a TiO₂/zeolite composite and to determine the optimum irradiation time based on a pseudo-first-order kinetic model. Irradiation times of 15, 30, 45, 60, and 75 minutes were applied, and phenol concentrations were measured using UV–Vis spectrophotometry at 270,20 nm. The results show rapid degradation during the first phase (15-30 minutes), with removal efficiency increasing from 83,014% to 87,315%. After 30 minutes, the degradation rate becomes nearly constant, indicating the attainment of photocatalytic dynamic equilibrium. The -ln(Ct/C0) plot reveals two distinct reaction phases: an initial high-rate phase followed by a plateau phase. Therefore, 30 minutes is identified as the most efficient irradiation time, representing the point at which maximum degradation is achieved before the reaction rate significantly decreases. These findings provide meaningful insight into the photocatalytic kinetics of TiO₂/zeolite composites and support their potential application in phenolic wastewater treatment.
The Effect of Inorganic Acid Activation on the Metal Oxide Content of Natural Montmorillonite from Gowa Regency Suriati Eka Putri; Sumiati Side; Nita Magfirah Ilyas; Diana Eka Pratiwi; Abd Rahman
Venn: Journal of Sustainable Innovation on Education, Mathematics and Natural Sciences Vol. 5 No. 4 (2026): MIPA dan dan Pendidikan lingkup MIPA
Publisher : Pusat Studi Bahasa dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53696/venn.v5i4.477

Abstract

Natural montmorillonite has attracted considerable attention due to its high cation exchange capacity, layered structure, and potential applications as adsorbents and catalyst supports. However, it generally contains impurity oxides that affect its physicochemical properties. This study aimed to investigate the effect of inorganic acid activation on the metal oxide content and crystalline characteristics of natural montmorillonite obtained from Gowa Regency, South Sulawesi, Indonesia. The montmorillonite samples were activated using 2 M HCl and 2 M H₂SO₄ through acid leaching treatment. The metal oxide composition and crystalline phases were characterized using X-ray fluorescence (XRF) and X-ray diffraction (XRD), respectively. The XRF results revealed that Fe₂O₃ was the dominant impurity oxide in natural montmorillonite with a concentration of 31.61%. After acid activation, the Fe₂O₃ content decreased significantly to 21.78% for HCl-treated MMT and 18.83% for H₂SO₄-treated MMT, indicating effective removal of iron oxide impurities. In contrast, the SiO₂ content increased from 39.51% to 40.13% and 41.02% after HCl and H₂SO₄ activation, respectively. XRD analysis confirmed the presence of quartz silica, alumina, and hematite phases, with diffraction peaks at 2θ ≈ 26.6°, 34.2°, and 50.1°, respectively. Acid activation also reduced the average crystallite size from 41.2 nm in natural MMT to 35.1 nm and 29.9 nm after HCl and H₂SO₄ treatment, respectively. The results demonstrate that inorganic acid activation effectively modified the oxide composition and crystalline structure of natural montmorillonite, particularly through the removal of hematite impurities and enhancement of silica-rich phases. Therefore, acid-activated montmorillonite shows promising potential for adsorption and catalytic applications.
Analisis Kandungan Gizi Kopi Biji Salak Desa Pekkabata Kecamatan Duampanua Kabupaten Pinrang Diana Eka Pratiwi; Suriati Eka Putri; Muhammad Ilham Wardhana Haeruddin
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 10 No. 1 (2021): Volume 10 Nomor 1 (Maret 2021)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

The analysis of the nutritional content of salakseed coffee in Pekkabata Village, Duampanua District, Pinrang Regency aims to determine the protein content, fat content and carbohydrates contained in the zalacca seed coffee products of Community Partnership Program (PKM) BKMT Pekkabata Village. Based on the results of interviews and observations with the local community, the farmed salak is usually sold to the market and is also usually consumed alone, however the zalacca seeds are only thrown away. Thus the PKM team conducted counseling on the making of zalacca seed coffee. Based on the analysis results obtained protein content of 4.42%; fat content 12.19%; and carbohydrate content of 46.74%.
Synthesis of Chitosan-Based Solid Electrolyte Membrane Diana Eka Pratiwi
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 7 No. 2 (2018): Volume 7 Nomor 2 (September 2018)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

The rapid advancement of technology leads to an increase in battery demand, one of which is lithium ion batteries. Lithium batteries have flammable liquid electrolytes when electrolyte leaks, and lithium metals in the battery will react with water, producing explosive hydrogen gas. Currently electrolytic solids as battery electrolytes have been widely developed. Chitosan is one type of natural polymerthat has the potential as a solid electrolyte material. The addition of a cation with a low atomic mass such as lithium ions (Li+) inside the polymer membrane enables an efficient charge transfer process. This study is an experimental study aimed at synthesizing a chitosan-based solid electrolyte membrane. The chitosan sample used is chitosan which has deacetylation degree of 98%. The chitosan-LiOH electrolyte membrane was synthesized using blending method with the ratio of chitosan-LiOH concentration of (100: 0), (95: 5), (90:10), (85:15), and (84:16) % w / w . The membrane obtained was characterized by color and thickness, determination of conductivity using LCR meter, and degree of crystallinity analysis with X-Ray Diffraction (XRD) tool. From the resultof the research, clear yellow chitosan-LiOH membrane was obtained with an average thickness of 0.1 mm, with the highest conductivity obtained with the ratio of chitosan-LiOH concentration of (85:15) % w / w.
Microstructure Investigations of Natural Clay From Pattallassang District, Takalar Regency, South Sulawesi Province, Indonesia Abd Rahman; Suriati Eka Putri; Diana Eka Pratiwi; Satria Putra Jaya
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 1 (2023): Volume 12 Nomor 1 (Maret 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

The study aimed to investigate the microstructure of natural clay from Pattallassang District, Takalar Regency, South Sulawesi Province. The clay was characterized using X-ray diffractometer (XRD), surface area analyzer (SAA), and scanning electron microscope (SEM). The XRD analysis showed that the main mineral composition of the clay was kaolinite, quartz, hematite, geothite, magnetite, and anatase phases. The SAA using BET analysis shows the large surface area of 59.26 m2/g and BJH analysis for pore distribution of 32.77 nm. SEM observations revealed that the clay consists of plate-like kaolinite particles arranged randomly. The results indicate that the natural clay from Pattallassang District has good potential for use in various industrial applications due to its high kaolinite content and favorable microstructure.
Co-Authors Abd Rahman Abd. Rahman Abdul Rahman Ahmad Fudhail  Majid Andi Eka Kartika Aulia Rahma Auliya Marwah Hijriyah Bahriah Bahriah Fachry Abda El Rahman Fahruddin Ilham Nur Gusma Harfiana Abbas Haryanti Putri Rizal Hasri Hasri Hasri Marlina Ummas Genisa Muftihatu Rahma Muhammad Akbar Muhammad Danial Muhammad Ilham Wardhana Haeruddin Muhammad Syahrir Munawwarah Munawwarah Nita Magfirah Ilyas Nur Afni Pince Salempa Rachmat Triandi Tjahjanto Satria Putra Jaya Satria Putra Jaya Satria Putra Jaya Negara Sumiati Side Suriati Eka Putri Suriati Eka Putri