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Efficient degradation of methyl orange through photo-Fenton processes with MIL-100(Fe) modified Fe\(_3\)O\(_4\) (Fe\(_3\)O\(_4\)@MIL-100(Fe)) catalyst Puspitasari, Melani Puji; Pratama, Jeesica Hermayanti; Nugroho, Roshid Adi; Lestari, Witri Wahyu; Kemala, Yusnadia; Saraswati, Teguh Endah; Fansuri, Hamzah; Mukti, Rino Rakhmata; Suharbiansah, Rujito S. R.
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1493

Abstract

The research successfully synthesized a composite MIL-100(Fe) modified Fe3O4 (Fe3O4@MIL-100(Fe)) catalyst and examined its efficiency in degrading methyl orange (MO) through the photo-Fenton process compared to Fenton. The different percentages of Fe3O4 were integrated into MIL-100(Fe) and their effects on material characteristics and degradation capabilities were studied. Ex-situ synthesis involved varying Fe3O4 weight ratios (3, 10, and 20% w/w). Characterization techniques confirmed the integration of Fe3O4 and MIL-100(Fe) and revealed changes in surface area, pore size, and thermal stability with Fe3O4 addition. Meanwhile, removal tests showed promising results with the photo-Fenton process exhibiting maximum efficiency (95.51%) using 10% Fe3O4@MIL-100(Fe). This study provides valuable insights into developing efficient photo-Fenton catalysts for environmental remediation, particularly for addressing dye pollution in wastewater by highlighting the potential of Fe3O4@MIL-100(Fe) composites in this context.
Peningkatan Kualitas Produksi Ecoprint Corak Pewarna Alam melalui Pendampingan Proses Teknik Pewarnaan di UMKM Ecorilife.Id Wahyuningsih, Sayekti; Rahardjo, Sentot Budi; Lestar, Witri Wahyu; Saraswati, Teguh Endah; Widjonarko, Dian Maruto; Pramono, Edi; Naufal, Widyan Muhammad; Faradilla, Radianita
Jurnal Abdi Masyarakat Indonesia Vol 5 No 1 (2025): JAMSI - Januari 2025
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.1301

Abstract

Ecorilife.id merupakan salah satu UMKM yang bergerak pada bidang produksi ecoprint. Akan tetapi, terdapat permasalahan prioritas dari mitra, yaitu kualitas warna pada produksi kain ecoprint yang tidak stabil, meliputi pewarnaan dasar gelap dan terang, pengaruh teknis pewarnaan, dan penggunaan bahan-bahan pewarna alam. Solusi yang diharapkan mampu menyelesaikan permasalahan tersebut dilakukan melalui pendampingan proses produksi ecoprint pada Ecorilife.id. Kegiatan tersebut dilakukan dengan melakukan optimasi pada tahap pewarnaan dan mordanting menggunaan tawas (Al2(SO4)3), natrium asetat (Na-acetat), atau soda abu (Na2CO3) supaya produk ecoprint memiliki warna yang tidak mudah luntur serta bercampur secara sempurna dengan kain. Pewarna dasar kain dioptimasi dengan pewarna alam tingi dan jolawe. Tahapan pewarnaan ecoprint dilakukan dengan teknik steaming setelah tahap mordanting yang kemudian dikeringkan. Tahap pewarnaan dan pembentukan motif dilakukan dengan menggunakan motif yang muncul dari daun jati, daun akalipa, daun kalpataru, dan bunga cosmos. Fiksasi dilakukan dengan kapur untuk menghasilkan warna-warna ecoprint yang jelas. Hasil menunjukkan terciptanya produk ecoprint dengan kualitas warna tinggi yang dapat diamati melalui hasil pewarnaan yang terlihat detail, tidak berbaur, dan tidak luntur.
Enhanced Performance of Epoxy Resin-Polyimide Hybrid Composites with Aminated Carbon Nanofibers Filler Saraswati, Teguh Endah; Saputri, Dini Deviana; Raharjo, Wijang Wisnu
Science and Technology Indonesia Vol. 10 No. 1 (2025): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.1.152-164

Abstract

Incorporating epoxy resin (ER) and polyimide (PI) with supporting filler will exhibit composites with exceptional mechanical, thermal, and electromagnetic shielding properties. This research investigates the preparation of aminated carbon nanofiber (CNF) as a filler in epoxy resin-polyimide hybrid composites. The preparation of the CNF filler was initially done by the purification process through dissolution in toluene and vacuum annealing at 800°C for 3 hours. The amine modification of CNF was done by reacting CNF with ethylenediamine, sodium nitrite, and sulfuric acid. The aminated CNF was then mixed with polyimide precursor (oxydianiline and pyromellitic dianhydride), becoming poly(amic acid)-filler. The last step was combining poly(amic acid)-filler with epoxy resin diglycidyl ether bisphenol A and polyaminoamide as hardener. The Scanning Electron Microscope (SEM) and Transmission Electron Microscopy (TEM) images of CNF showed the overlapped bundle fibers with the average fiber diameter around 100-120 nm. The successful amine modification was analyzed through Fourier-Transform Infrared (FTIR) analysis by the functional group emergence of C–N (∼1153 cm-1), N H (3737 cm-1), primary amine N–H (1534 cm-1), and better dispersion in water. The aminated filler shows a better distribution in the polymer matrices observed through macroscopic images and a higher hardness value. The FTIR of composites shows the increasing intensity in the N–H, C O amide, and C–H functional groups, indicating the highly covalent bonds between polymers and the aminated CNF filler. The TGA graph shows the recognizable termination of the polyimide and epoxy resin matrices as major components in the composite. The ER-PI composites with aminated CNF filler show improved mechanical properties in the hardness, tensile properties, and electromagnetic interference (EMI) shielding efficiency by around three-fold higher than composites with unmodified CNF filler.
IDENTIFIKASI REACTIVE OXYGEN SPECIES PADA PLASMA DIELECTRIC BARRIER DISCHARGE KONFIGURASI MESH-COPPER YANG DIRANGKAI SINGLE DAN DOUBLE MENGGUNAKAN OPTICAL EMISSION SPECTROSCOPY: Kata Kunci: Plasma DBD, spesies oksigen reaktif, spektroskopi optik emisi, rangkaian tunggal dan ganda Abdurrahman, Ahmad Faruq; Aprilia, Ayu; Zahar, Intan; Kusumandari, Kusumandari; Saraswati, Teguh Endah
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p13-20

Abstract

Penelitian ini bertujuan untuk mengidentifikasi reactive oxygen species (ROS) yang dihasilkan oleh plasma dielectric barrier discharge (DBD) pada konfigurasi rangkaian single dan double menggunakan Optical Emission Spectroscopy (OES). Variasi reaktor DBD digunakan untuk mengevaluasi spektrum emisi plasma. Hasil menunjukkan bahwa intensitas spektrum emisi pada rangkaian double secara umum lebih tinggi dibandingkan dengan Single. Produksi radikal OH dan O pada konfigurasi double lebih stabil, sementara emisi spektrum N₂ menunjukkan intensitas yang lebih besar dibandingkan dengan single. Stabilitas ini diuji lebih lanjut pada sampel dengan pH basa, yang menunjukkan penurunan pH menuju netral. Pengukuran suhu menunjukkan kestabilan selama proses berlangsung, menjadikan konfigurasi double DBD efektif untuk penelitian yang membutuhkan kestabilan suhu larutan. Hasil ini mengindikasikan bahwa rangkaian double dapat meningkatkan efisiensi produksi ROS dalam aplikasi plasma. Kata Kunci: Plasma DBD, spesies oksigen reaktif, spektroskopi optik emisi, rangkaian tunggal dan ganda Abstract This study aims to identify reactive oxygen species (ROS) generated by dielectric barrier discharge (DBD) plasma in single and double configurations using Optical Emission Spectroscopy (OES). Variations in DBD reactors were employed to evaluate the plasma emission spectra. The results showed that the emission intensity in the double configuration was generally higher than in the single configuration. The production of OH and O radicals in the double configuration was more stable, while the N₂ emission spectrum exhibited higher intensity compared to the single configuration. This stability was further tested on a sample with alkaline pH, which showed a decrease in pH toward neutrality. Temperature measurements demonstrated stability throughout the process, making the double DBD configuration effective for studies requiring solution temperature stability. These findings indicate that the double configuration can enhance ROS production efficiency in plasma applications. Keywords: DBD plasma, reactive oxygen species, optical emission spectroscopy, single and double configurations
Pelatihan Pembuatan Teknologi Kombinasi Pupuk Dasar Dengan Sistem Lepas Lambat (Slow Release) Melalui Pencampuran Zeolit Alam Pada Kelompok Tani Karangpandan Pramono, Edi; Wahyuningsih, Sayekti; Lestari, Witri Wahyu; Saraswati, Teguh Endah; Widjonarko, Dian Maruto; Raharjo, Sentot Budi; Rahayu, Rahayu; Venny, Venny; Basith, Abdul; Zetadini, Reza; Melina, Dika Caesar; Wulandari, Resa
Jurnal Abdimas Kartika Wijayakusuma Vol 4 No 2 (2023): Jurnal Abdimas Kartika Wijayakusuma
Publisher : LPPM Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jakw.v4i2.360

Abstract

Permasalahan kelangkaan pupuk dan penggunaan pupuk kimia sintetik secara berlebih sering muncul dalam pertanian. Hal ini terjadi pula pada sistem pertanian hortikultura di daerah Karangpandan Kabupaten Karanganyar. Perlu adanya edukasi tentang pentingnya manajemen penggunaan pupuk yang baik untuk menghemat dan menjaga kualitas lahan pertanian. Pada kegiatan ini tim pengabdi memberikan penyuluhan dan pelatihan pembuatan pupuk lepas lambat atau slow release guna memberikan pemahaman pemanfaatan material anorganik alam dalam penghematan pupuk kimia sintetik. Kegiatan ini diawali dengan pemaparan materi zeolit dan manfaatnya bagi pertanian dan dilanjutkan dengan pelatihan pembuatan pupuk kombinasi zeolit. Dari pelatihan ini diperoleh bahwa masyarakat menjadi paham akan bahaya pemakaian pupuk sintetik berlebih dan manfaat zeolit bagi pertanian. Pelatihan menjadikan anggota kelompok tani mampu menyiapkan pupuk dengan kombinasi zeolit. Dari survey juga diperoleh bahwa masyarakat tertarik untuk memanfaatkan teknologi campuran pupuk tersebut guna menghemat pemakaian pupuk. Dari kegiatan ini diharapkan teknologi yang dikembangkan di universitas mampu memberikan kontribusi bagi masyarakat tani khususnya pada teknologi pupuk slow release berbasis zeolit alam dan dapat diterapkan bagi kelompok tani pada skala yang lebih besar.
The Effect of Fe Pillaring and Mg Intercalating into Bentonite Structure Widjonarko, Dian Maruto; Pramono, Edi; Rahardjo, Sentot Budi; Wahyuningsih, Sayekti; Saraswati, Teguh Endah
Jurnal Kimia Sains dan Aplikasi Vol 29, No 2 (2026): Volume 29 Issue 2 Year 2026
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.29.2.101-110

Abstract

Bentonite clay particles, measuring less than 2 μm, comprise stacked layers of tetrahedral and octahedral units in a 2:1 configuration (T-O-T). These negatively charged layers were subsequently neutralized with cations. However, the exchange or modification of the cation affects its structure and properties. This study investigates the effect of Fe-ion pillaring on the bentonite layer and the intercalation of Mg ions into Fe-pillared bentonite via ion exchange. The materials were characterized using Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM–EDX) to observe surface morphology and elemental composition, Particle Size Analyzer (PSA) to observe average size and size distribution of particle, Fourier-Transform Infrared Spectroscopy (FTIR) to identify the active site and layer structure, and X-ray Diffraction (XRD) to determine their structural and compositional changes. The results confirm the pillaring treatment effect on a higher average particle size of 469.3 nm, with a polydispersity index (PDI) of 0.495, compared to natural bentonite (414.8 nm and 0.586 nm, respectively). Meanwhile, the intercalating treatment showed a lower average particle size of 433.4 nm and a PDI value of 0.613. FTIR identified the silanol and siloxane functional groups, as well as the aluminosilicate layer. Pillaring by Fe2O3 increased the basal spacing of bentonite from 13.6 Å to 17.35 Å, as indicated by the shift of characteristic bentonite peaks to lower 2θ angles. However, intercalation by MgO into Fe-pillared bentonite actually slightly decreased the basal spacing to 15.16 Å. Meanwhile, Mg intercalation occurred within the interlayer of the aluminosilicate layer, resulting in a peak shift toward higher 2θ angles and an increase in crystallinity to 58.924%, compared with Fe-pillared bentonite (45.376%). This phenomenon is likely related to the presence of the Mg metal intercalant, which has basic properties and can attract the aluminosilicate sheets.
Chemical Study of Mordanting and Fixation Processes in Indigo, Sappanwood, and Tannin Natural Dyes Using Visual and UV-Vis Spectroscopic Analysis Wahyuningsih, Sayekti; Rahmawati, Rahmawati; Djuminah , Djuminah; Murni, Sri; Rosyad, Nisaul Hasanah Abdul; Saraswati, Teguh Endah; Pramono, Edi; Naufal, Widyan Muhammad; Azizah, Isna Nurmilatul; Apriliyani, Rizqi; Salsabila, Nadia Octaviani Faiq
G-Tech: Jurnal Teknologi Terapan Vol 10 No 2 (2026): G-Tech, Vol. 10 No. 2 April 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i2.9165

Abstract

Ecoprint is an eco-friendly textile dyeing technique whose color quality is strongly influenced by mordanting and fixation processes. However, inconsistent mordant–fixative systems often result in unstable color intensity and poor standardization. This study aimed to evaluate the effect of different mordant and fixative combinations on the color characteristics of ecoprint fabrics dyed with indigo (Indigofera tinctoria), sappanwood (Caesalpinia sappan), and tannin extracts. Cotton fabrics were treated with either conventional mordant or color mordant, followed by fixation using vinegar, bone lime, lime, clear ferrous sulphate, or ferrous sulphate. Color properties were analyzed using UV-Vis spectroscopy (200-800 nm) and RGB evaluation. Iron-containing mordant systems significantly enhanced absorbance intensity in the visible region. It reduced the RGB lightness values, indicating deeper, more stable colors. Indigo showed maximum absorption at 647-672 nm, with the darkest blue obtained with the color mordant combined with ferrous sulphate fixation. Sappanwood showed maximum absorbance in the 482-491 nm range, under iron-assisted treatments. Tannin dyeing produced the most pronounced darkening effect due to tannin–iron complex formation. Overall, iron-assisted mordant–fixative systems under controlled pH conditions provided the most optimal and reproducible color performance, offering a scientific basis for standardizing the ecoprint process in sustainable textile production.
The Initial Screening of Heavy Metal Adsorption on Highly Porous Metal-Organic Frameworks based on MIL-101(Cr), Ethylenediamine-modified MIL-101(Cr), and MIL-101(Cr)-NH2 Dendy, Dendy; Lestari, Witri Wahyu; Anshori, Isa; Rahardjo, Sentot Budi; Pramono, Edi; Saraswati, Teguh Endah; Wibowo, Fajar Rakhman
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.17186

Abstract

ABSTRACT. Heavy metal pollution is a significant environmental issue with detrimental effects on ecosystem and human health. Therefore, comprehensive handling need to be carried out. Herein we studied initial screening adsorption of heavy metals including Ni, Cu, Zn, Cd, and Pb using Metal-Organic Frameworks class of Materials Institute Lavoisier (MIL) based on Cr(III). MIL-101(Cr), and its modification with ethylenediamine (EA), and MIL-101(Cr)-NH2 were prepared under hydrothermal condition. X-ray diffraction and FT-IR analysis confirmed the formation of the targeted materials. A new absorption band at 1050 cm-1 corresponds to vibration of C-N which indicates the successful EA modification into MIL-101(Cr). Nitrogen sorption isotherm measurement revealed MIL-101(Cr) and EA@MIL-101(Cr) have a specific surface area of 2548.6 and 2079 m²/g with micropore-sized, while MIL-101(Cr)-NH2 has a specific surface area of 1583.4 m²/g with micro and mesopore-sized. Adsorption performance was assessed through batch experiments monitored by atomic absorption spectroscopy. The results show that MIL-101(Cr) and its modification with EA exhibit higher adsorption capacities on cadmium and nickel metal ions, compared to MIL-101(Cr)-NH2. Meanwhile, MIL-101(Cr)-NH2 and MIL-101(Cr) show more dominant adsorption capabilities on zinc and copper ions compared to the EA-modified MIL-101(Cr). This result suggests that the material's porosity still plays a dominant role in the adsorption processes compared to amine functionalize group on MIL itself. Keywords: adsorption, chromium(III), heavy metals, MOF, MIL
Rice Husk Ash-Derived Magnetized Silica Functionalized with TMPDT for Heavy Metal Ion Removal Hastuti, Sri; Irfani, Hasna Haifa; Nuzula, Rifania Aura; Saraswati, Teguh Endah; Masykur, Abu; Purnawan, Candra; Wibowo, Atmanto Heru; Fitriana, Dina
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.17837

Abstract

ABSTRACT. The removal of toxic heavy metal ions from water remains a critical environmental challenge. In this study, a novel magnetized mesoporous silica adsorbent functionalized with N1-(3-trimethoxysilylpropyl) diethylenetriamine (Fe₃O₄@SiO₂@meso-SiO2@TMPDT), synthesized from rice husk ash, was developed for the adsorption of Cd(II) and Pb(II) ions. The characterization of the adsorbent by FTIR, SEM-EDX, and TGA confirmed the successful synthesis of magnetized and TMPDT-functionalized silica derived from rice husk ash (Fe₃O₄@SiO₂@meso-SiO₂@TMPDT). The adsorption study consists of the determination of optimum pH, the adsorption kinetics study, and the adsorption isotherm. Batch adsorption studies showed that the optimal pH values for Cd(II) and Pb(II) adsorption were 4 and 3, respectively. The adsorption kinetics for both metal ions followed a pseudo-second-order model. Furthermore, the adsorption isotherms fitted both the Langmuir and the Freundlich models with comparable R² values. The maximum adsorption capacities (Qₘ) of Fe₃O₄@SiO₂@meso-SiO₂@TMPDT for Cd(II) and Pb(II) were 28.089 and 24.498 mg/g, respectively. These findings demonstrate that the developed adsorbents offer an effective and sustainable approach for heavy metal removal from aqueous systems. Keywords: adsorption, heavy metal ions, magnetized silica, rice husk ash, TMPDT
Lucutan Plasma Pijar Korona dengan Variasi Tegangan untuk Degradasi Metilen Biru kusumandari, kusumandari; Saraswati, Teguh Endah; Saputri, Nor Shalina
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 01 (2019): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (556.495 KB) | DOI: 10.13057/ijap.v9i01.29790

Abstract

Teknologi plasma merupakan metode pengolahan limbah yang cukup menjanjikan. Dalam penelitian ini, lucutan plasma dihasilkan dari dua buah elektroda jarum stainless steel yang dipasang paralel dan dihubungkan dengan tegangan tinggi bolak-balik (AC) sebesar 8.5 – 11.5 kV. Metilen biru digunakan sebagai larutan model. Elektroda berada sekitar 2 mm di atas larutan yang diletakkan pada magnetic stirrer dengan kecepatan 6 rpm. Waktu perlakuan yang digunakan adalah 2, 4, 6, 8, dan 10 menit untuk setiap tegangan. Karakteristik larutan meliputi absorbansi, pH dan suhu diukur sebelum dan sesudah perlakuan untuk mengetahui pengaruh tegangan dan lama waktu perlakuan plasma. Hasil yang didapat, absorbansi dan pH turun seiring kenaikan tegangan dan lama waktu perlakuan, sedangkan suhu akan semakin naik.