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Negara, Satria Putra Jaya
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Insight of Anionic Dyes Adsorption from Their Aqueous Solutions onto MgAl LDH/Lignin: Characterization and Isotherm Studies Ahmad, Nur; Marlan, Abd Rahman; Negara, Satria Putra Jaya
Indonesian Journal of Material Research Vol. 2 No. 2 (2024): July
Publisher : Magister Program of Material Science Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijmr.20242233

Abstract

The removal of hazardous anionic dyes from wastewater is a critical environmental challenge due to their toxic effects and persistence in aquatic systems. This study investigates the adsorption performance of a new composite material, consisting of MgAl layered double hydroxide (LDH) and Lignin (MgAl LDH/Lignin), to remove three different anionic dyes: congo red, direct yellow, and procion red. The composite material was synthesized and thoroughly examined using various techniques, including X-ray diffraction, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller, and Barrett-Joyner-Halenda. The adsorption isotherm studies indicate that the adsorption of congo red and procion red onto the MgAl LDH/Lignin composite follows the Langmuir isotherm model, suggesting a monolayer adsorption on a uniform surface. On the other hand, the adsorption of direct yellow conforms to the Freundlich isotherm model, indicating the possibility of multiple layers being adsorbed on a surface with varying properties. The maximum adsorption capacities for congo red, direct yellow, and procion red were found to be 75.76 mg/g, 51.55 mg/g, and 74.63 mg/g, respectively. The results of this study demonstrate the promising capabilities of MgAl LDH/Lignin composites as highly efficient adsorbents for the treatment of wastewater contaminated with anionic dyes. This research provides valuable insights into the potential of these composites to address the pressing issue of water pollution in a sustainable manner.
Synthesis of Chitosan Silica Membrane from Petung Bamboo (Dendrocalamus asper) Leaves and Its Application as Pb(II) Metallic Adsorbent Hasri, Hasri; Pratiwi, Diana Eka; Safitri, Isriyanti; Negara, Satria Putra Jaya
Indonesian Journal of Chemistry Vol 24, No 3 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.82065

Abstract

Membrane synthesis through a phase inversion method using chitosan and sodium silicate solutions has been conducted. This research aims to characterize the silica chitosan membrane (SCM) of petung bamboo leaves and determine the synthesized product's adsorption capacity for Pb(II) ions. The XRF characterization showed the silica content of petung bamboo leaves with a percentage of 78.03%. SEM analysis before adsorption is around 13.0 μm, and the pore diameter after adsorption is around 9.7 μm. The results of adsorption analysis of Pb(II) metal using AAS showed that the SCM variation A at an initial concentration of 10.0000 ppm Pb(II) metal adsorbed was 9.8101 ppm, and at an initial concentration of 25.0000 ppm Pb(II) metal was 22.3421 ppm. The variation B at an initial concentration of 10.0000 ppm Pb(II) metal adsorbed was 9.8870 ppm and at an initial concentration of 25.0000 ppm Pb(II) metal adsorbed was 23.5806 ppm. The variation C at an initial concentration of 10.0000 ppm Pb(II) metal adsorbed was 9.9639 ppm, and at an initial concentration of 25.0000 ppm Pb(II) metal was 24.1855 ppm. The results of this research conclude that the highest SCM adsorption power is variation C (2%:22.95%) with a percentage of 99.63%.
The Utilization of Gracilaria sp. as Raw Material for Cellulose in Cellulose Acetate-Nickel Oxide (CA-NiO) as Electrode for Energy Storage Technology Karim, Abdul; Ahmad, Ahyar; Arfah, Rugaiyah Andi; Ermawar, Riksfardini Annisa; Karim, Harningsih; Putra, Andi Erwin Eka; Putri, Suriati Eka; Negara, Satria Putra Jaya; Larekeng, Siti Halimah
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.96533

Abstract

In the modern era, electrical energy has become a significant need that drives the large consumption of fossil fuels and their environmental impacts. Supercapacitors can reduce this large consumption of natural polymers such as cellulose acetate (CA), which can be synthesized from Gracilaria sp. Composites with CA can be an environmentally friendly alternative electrode with low toxicity. The results show that the cellulose has been successfully synthesized from the algae Gracilaria sp., which was proven by FTIR spectra analysis. The results also show that supercapacitor electrodes have been successfully made where the manufactured electrodes form a composite between CA and nickel oxide (NiO), with the highest specific capacitance and specific energy values of 15.5 × 102 F/g and 13.3 × 102 Wh/kg, respectively, on the CA-NiO2 electrode, but when the NiO concentration is higher than the CA concentration the specific capacitance and specific energy decrease as shown on the CA-NiO electrode with NiO mass of 0.6 g. Thus, the materials results of this study can be applied to electric vehicles and technology that requires electricity storage in the future.
PELATIHAN LITERATURE REVIEW GUNA MENINGKATKAN PEMAHAMAN MENDALAM MENYUSUN KARYA TULIS ILMIAH PADA MAHASISWA JURUSAN KIMIA UNIVERSITAS NEGERI MAKASSAR Kartika, Andi Eka; Negara, Satria Putra Jaya; Agussalim, Hastuti; Hasri, Hasri; Afni, Nur
ABDI KIMIA: Jurnal Pengabdian Masyarakat Vol 2 No 2 (2025): Jurnal Edisi Juni
Publisher : Jurusan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/abdi.v2i2.8347

Abstract

Kemampuan dalam menyusun literature review merupakan keterampilan esensial dalam penulisan karya tulis ilmiah di perguruan tinggi. Namun, banyak mahasiswa masih mengalami kesulitan dalam memahami konsep literature review dan memanfaatkan aplikasi manajemen referensi. Untuk mengatasi permasalahan tersebut, telah dilaksanakan kegiatan pelatihan bertema “Literature review guna meningkatkan pemahaman mendalam menyusun karya tulis ilmiah bagi mahasiswa Jurusan Kimia FMIPA Universitas Negeri Makassar”. Metode pelaksanaan mencakup penyuluhan teoritis, bimbingan teknis, praktik mandiri, serta evaluasi melalui angket pre-test dan post-test dengan enam butir pertanyaan sebagai indikator kompetensi. Kegiatan ini diikuti oleh 20 mahasiswa aktif angkatan 2023–2024. Hasil evaluasi menunjukkan adanya peningkatan signifikan dalam pemahaman mahasiswa, terutama pada pemahaman dasar literature review, pengorganisasian literatur, serta pembuatan daftar pustaka otomatis. Sebanyak 60–75% peserta menunjukkan peningkatan kompetensi pada indikator utama. Kegiatan ini terbukti efektif dalam meningkatkan keterampilan mahasiswa dalam menyusun karya tulis ilmiah berbasis referensi yang relevan dan terstruktur. Kegiatan ini memberikan kontribusi penting dalam peningkatan literasi ilmiah mahasiswa serta mengurangi risiko plagiarisme akibat kesalahan sitasi.
Sintesis Komposit Kitin-Silika (Ki-Sil) dan aplikasinya sebagai adsorben Logam Fe(III) dan Cr(III) Hasri, Hasri; Pratiwi, Diana Eka; Rahma, Muftihatu; Negara, Satria Putra Jaya; Genisa, Marlina Ummas; Rizal, Haryanti Putri
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 14, No 1 (2025): Maret
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat141707452025

Abstract

Limbah sekam padi dapat dimanfaatkan sebagai sumber silika dengan kandungan silika sebesar 86,90-97,30 % hal ini berpotensi sebagai material berbahan dasar silika. Demikian pula sumber kitin berlimpah pada cangkang crustaceas (kepiting, udang, lobster dll), perpaduan kitin-silika (Ki-Sil) sebagai komposit menjadi sangat menarik untuk diteliti. Sehingga penelitian ini bertujuan untuk mensintesis komposit Ki-Sil dan aplikasinya sebagai adsorben ion logam Fe(III) dan Cr(III). Mula-mula dilakukan ekstraksi silika sekam padi selanjutnya sintesis komposit Ki-Sil. Komposit yang diperoleh  dioptimasi terhadap pH dengan variasi pH (2-6), kapasitas adsorpsi dengan variasi konsentrasi (50-150 ppm) dan uji selektivitas adsorpsi kedua ion logam dengan perbandingan (0,25:0,75 ; 0,75:0,25 dan 1:1). Analisis gugus fungsi Ki-Sil menggunakan FTIR dan analisis morfologi menggunakan SEM. Hasil penelitian diperoleh pH optimum 4 untuk adsorpsi kedua logam target. Kapasitas adsorpsi logam Fe(III) berturut-turut adalah 31,49 mg/g; 69,69 mg/g; 89,83 mg/g dan 138,57 mg/g. Dan kapasitas adsorpsi logam Cr(III) berturut-turut adalah 37,80 mg/g; 70,86 mg/g; 89,98 mg/g dan 138,84 mg/g. Hasil uji selektivitas menunjukkan bahwa Ki-Sil mengadsorpsi logam Fe(III) sebesar 0,9820 mmol dan terhadap logam Cr(III) sebesar 0,9949 mmol. Disimpulkan bahwa komposit Ki-Sil lebih selektif mengadsorpsi logam Cr(III).
Antioxidant Potential of Phenolic Compounds from Sonneratia caseolaris Mangrove Roots: Isolation, Spectroscopic Analysis, Molecular Docking, Molecular Dynamic, and In-Vitro Studies Herawati*, Netti; Putri, Suriati Eka; Negara, Satria Putra Jaya; Irfandi, Rizal; Mazaya, Maulida; Rahman, Abd
Jurnal IPA & Pembelajaran IPA Vol 9, No 2 (2025): JUNE 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jipi.v9i2.44821

Abstract

Free radicals contribute to the onset of various degenerative diseases, highlighting the need for safe and effective antioxidants. Given the potential side effects associated with synthetic antioxidants, Sonneratia caseolaris is considered a promising natural alternative. This study aims to isolate secondary metabolites from the roots of S. caseolaris, evaluate their antioxidant activity, and analyze their molecular interactions. Extraction was conducted using a range of solvents, and antioxidant activity was assessed using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The ethyl acetate fraction exhibited the highest antioxidant activity and was subsequently subjected to isolation procedures. From this fraction, a white crystalline compound with a melting point of 251253C was obtained. Spectroscopic analysis identified the compound as 3,4,5-trihydroxybenzoate, a type of phenolic compound. This compound exhibited very strong antioxidant activity, with an IC value of 6.63 g/mL, which is significantly lower than that of ascorbic acid (17.64 g/mL), indicating higher potency. Molecular docking analysis showed that 3,4,5-trihydroxybenzoate formed strong interactions with active residues of cytochrome c peroxidase, particularly Trp51 and Gly112, through hydrogen bonds and hydrophobic interactions. Additionally, molecular dynamics simulations revealed that the compound-enzyme complex exhibited greater structural stability than the control (ascorbic acid), as indicated by lower residue fluctuations in root mean square deviation (RMSD) and root mean square fluctuation (RMSF) analysis analyses. These findings support the potential of Sonneratia caseolaris as a natural source for the development of antioxidant compounds with strong biological activity and favorable molecular interaction profiles
Sintesis Komposit Kitin-Silika (Ki-Sil) dan aplikasinya sebagai adsorben Logam Fe(III) dan Cr(III) Hasri, Hasri; Pratiwi, Diana Eka; Rahma, Muftihatu; Negara, Satria Putra Jaya; Genisa, Marlina Ummas; Rizal, Haryanti Putri
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 14, No 1 (2025): Maret
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat141707452025

Abstract

Limbah sekam padi dapat dimanfaatkan sebagai sumber silika dengan kandungan silika sebesar 86,90-97,30 % hal ini berpotensi sebagai material berbahan dasar silika. Demikian pula sumber kitin berlimpah pada cangkang crustaceas (kepiting, udang, lobster dll), perpaduan kitin-silika (Ki-Sil) sebagai komposit menjadi sangat menarik untuk diteliti. Sehingga penelitian ini bertujuan untuk mensintesis komposit Ki-Sil dan aplikasinya sebagai adsorben ion logam Fe(III) dan Cr(III). Mula-mula dilakukan ekstraksi silika sekam padi selanjutnya sintesis komposit Ki-Sil. Komposit yang diperoleh  dioptimasi terhadap pH dengan variasi pH (2-6), kapasitas adsorpsi dengan variasi konsentrasi (50-150 ppm) dan uji selektivitas adsorpsi kedua ion logam dengan perbandingan (0,25:0,75 ; 0,75:0,25 dan 1:1). Analisis gugus fungsi Ki-Sil menggunakan FTIR dan analisis morfologi menggunakan SEM. Hasil penelitian diperoleh pH optimum 4 untuk adsorpsi kedua logam target. Kapasitas adsorpsi logam Fe(III) berturut-turut adalah 31,49 mg/g; 69,69 mg/g; 89,83 mg/g dan 138,57 mg/g. Dan kapasitas adsorpsi logam Cr(III) berturut-turut adalah 37,80 mg/g; 70,86 mg/g; 89,98 mg/g dan 138,84 mg/g. Hasil uji selektivitas menunjukkan bahwa Ki-Sil mengadsorpsi logam Fe(III) sebesar 0,9820 mmol dan terhadap logam Cr(III) sebesar 0,9949 mmol. Disimpulkan bahwa komposit Ki-Sil lebih selektif mengadsorpsi logam Cr(III).
Pelatihan Penyusunan Laporan Keuangan Sederhana Bagi Pemilik Rumah Kos di Jalan Siti Dg Kati Kota Makassar Macenning, A. Reski Almaida Dg; Negara, Satria Putra Jaya; Hasnidar, Hasnidar; Rahmat, Muhammad Rijal Alim; Windarsari, Wiwin Riski
Abdi Cendekia : Jurnal Pengabdian Masyarakat Vol 4 No 3 (2025): September
Publisher : Yayasan Zia Salsabila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61253/abdicendekia.v4i3.385

Abstract

Usaha rumah kos merupakan salah satu bentuk usaha mikro yang tumbuh pesat di daerah Abdesir sebagai respons terhadap meningkatnya kebutuhan tempat tinggal sementara bagi mahasiswa, pekerja, dan pendatang. Meskipun potensial, mayoritas pemilik rumah kos masih belum menerapkan pengelolaan keuangan yang baik dan terstruktur. Minimnya literasi keuangan menyebabkan ketidaktahuan terhadap kondisi riil keuangan usaha, kesulitan dalam membuat laporan, serta kendala dalam pengambilan keputusan usaha yang tepat. Kegiatan pengabdian ini bertujuan untuk meningkatkan pemahaman dan keterampilan pemilik kos dalam menyusun laporan keuangan sederhana. Metode yang digunakan meliputi penyuluhan, praktik langsung menggunakan template berbasis Excel, serta pendampingan pascapelatihan. Hasil kegiatan menunjukkan peningkatan signifikan dalam pemahaman peserta mengenai jenis dan fungsi laporan keuangan, serta kemampuan menyusun laporan keuangan dasar seperti arus kas dan laba rugi. Sebanyak 85% peserta mengalami peningkatan pemahaman, dan 75% mampu mengaplikasikan materi dalam praktik. Respon peserta sangat positif, dan sebagian besar menyatakan komitmen untuk menerapkan pencatatan keuangan secara berkelanjutan. Pelatihan ini terbukti efektif dalam memberdayakan pelaku usaha mikro agar dapat mengelola usahanya secara lebih profesional dan berkelanjutan.
Co-Authors Abd Rahman Abdul Karim Agussalim, Hastuti Ahyar Ahmad Andi Erwin Eka Putra Arfah, Rugaiyah Andi Diana Eka Pratiwi Harningsih Karim Haryanti Putri Rizal Hasnidar Hasnidar Hasri Hasri Irfandi, Rizal Kartika, Andi Eka Macenning, A. Reski Almaida Dg Marlan, Abd Rahman Marlina Ummas Genisa Mazaya, Maulida Netti Herawati Nur Afni Nur Ahmad, Nur Rahma, Muftihatu Rahmat, Muhammad Rijal Alim Riksfardini Annisa ERMAWAR Safitri, Isriyanti SITI HALIMAH LAREKENG, SITI HALIMAH Suriati Eka Putri Windarsari, Wiwin Riski