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All Journal Jurnal Teknik Kimia USU BERKALA SAINSTEK The Journal of Pure and Applied Chemistry Research Jurnal Sains & Teknologi Lingkungan Chemistry Indonesian Journal of Chemical Research Indonesian Journal of Chemical Analysis (IJCA) Barometer Jurnal Pengendalian Pencemaran Lingkungan (JPPL) REACTOR : Journal of Research On Chemistry And Engineering IJCR (Indonesian Journal of Chemical Research) Makara Journal of Technology Jurnal Ilmu dan Inovasi Fisika Sainteks: Jurnal Sain dan Teknik Journal of The Indonesian Society of Integrated Chemistry
Perdani, Meka Saima
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, The University Of Bengkulu, 38371A
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics

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Penentuan Formulasi Terbaik Pembuatan Sampo Kendaraan Berbahan Dasar Sisa Produk Sampo di Industri Sampo Fauzi, Muhammad Rezal Alfian; Hasannah, Cintiya Septa; Perdani, Meka Saima; Prajati, Gita
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 1 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i1.122

Abstract

This research aims to process remaining shampoo products originating from the sampo industry into vehicle shampoo so that it has sales value and also has good quality. Determining the formulation for making this vehicle shampoo uses the trial and error method. After that, the variation data obtained will be tested through a pH test, density test, viscosity test, foam power test and corrosivity test. The results obtained are that the remaining variation data for the 25 mL shampoo product is the most optimal data because it meets the requirements for pH, density, viscosity and foaming test results. The results obtained from the variation data to make the best formulation were 47% remaining shampoo, 8% LAS, 8% NaCl (0.5 N), 8% NaOH (0.1 N), 0.4% Essense (Bubble Gum). %, and Aquadest 30%. This formulation produces a pH value of 7.18. Meanwhile, the density is 1.0257 g/cm3. The viscosity of this composition is 2.999 Pa.s. The stability of the foam power is 66,7% and the corrosion resistance test results get a value of 0.145655 mm/year or in the "Good" category in terms of corrosion resistance.
Pembuatan Hidrogel Berbasis Carboxymethyl Cellulose (CMC) dan Pektin sebagai Adsorben Logam Cu dengan Metode Freeze-Thaw Dewi, Nurazizah Melani; Maelan, Nabilla Maharani; Andini, Sri; Perdani, Meka Saima; Wahyuningtyas, Aulia
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 6 No. 2 (2024): JPPL, September 2024
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M), Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v6i2.2412

Abstract

Water pollution is a serious global problem caused by increasing industrialization and urbanization. The heavy metal Cu is one of the dangerous compounds that causes water pollution because it has a toxic effect on humans and can cause mental retardation, anemia, hypertension, etc. Removal of Cu metal in water can be done using CMC and Pectin-based hydrogel adsorbents. Hydrogels are hydrophilic polymer composites with a physically well-defined three-dimensional (3D) network and chemically responsive functional groups, which enable the hydrogel to easily capture metal ions without dissolving. The hydrogel synthesized via the Freeze-Thaw method has greater elastic characteristics. The adsorption properties were investigated by two isotherm models and five kinetic models. FTIR analysis proved that the –OH group was detected freely due to the interaction between CMC and pectin, the COOH group with the highest ability to bind metals, and other groups, namely C=O, C-O, and C-O-C. BET analysis shows that the hydrogel has a surface area of 1.685 m²/g and is classified as type 1 on the isotherm chart, referring to the dominance of micropores in a material or materials with mesopore content close to micropores. The optimum conditions in the adsorption process are at a concentration of 223 ppm, using the Langmuir isotherm model with an adsorption efficiency of 20,84%. The highest adsorption capacity was at a concentration of 74 ppm which occurred at 120 minutes, using a Pseudo 2nd Order kinetic model with an adsorption efficiency of 85,07%.
Karakteristik ZnO Nanorod Berstruktur Seperti Landak Sebagai Fotoanoda Pada Dye-Sensitized Solar Cell (DSSC) Yuliasari, Fitri; Aeni, Alfieta Rohmaful; Wahyuningtyas, Aulia; Umam, Hilman Imadul; Perdani, Meka Saima; Pambudi, Teguh; Hidayat, Rahmat
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 8, No 1 (2024)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v8i1.49327

Abstract

Penelitian ini bertujuan membuat sel surya jenis Dye-sensitized solar cell  (DSSC) dengan memanfaatkan ZnO nanorod (ZnO-NR) berstruktur seperti landak sebagai lapisan fotoanoda. Fotoanoda ZnO-NR dibuat dari lapisan penumbuh (seed layer) ZnO nanopartikel (ZnO-NP) diatas substrat ITO menggunakan metode hidrotermal dengan variasi perbandingan konsentrasi larutan penumbuh (growth solution) hexamethylenetetramine (HMTA):Zn(NO3)2·6H2O adalah 0,1 : 0,1 M dan 0,25 : 0,05 M. Morfologi ZnO nanorod dipelajari melalui karakterisasi Scanning Electron Microscopy (SEM) yang menunjukan bahwa penambahan ZnO-NP pada lapisan penumbuh akan menghasilkan ZnO-NR berstruktur seperti landak. Karakterisasi X-Ray Diffraction (XRD) menunjukkan bahwa ZnO-NR menghasilkan pola puncak difraksi yang sesuai dengan bidang ZnO dan berbentuk hexagonal wurzite. Hasil pengukuran Spektroskopi UV-Vis menunjukkan penyerapan dye oleh ZnO-NR pada rentang UV hingga cahaya tampak. Pada penelitian ini pembuatan DSSC difabrikasi dengan struktur ITO/ZnO-NR/D358-dye/mosalyte/Platina/FTO. Parameter-parameter DSSC kemudian dipelajari melalui pengukuran arus-tegangan (I-V) sementara itu rekombinasi muatan yang terjadi, dipelajari melalui karakterisasi Intensity Modulated Photovoltage Spectroscopy (IMVS). Efisiensi yang dihasilkan mencapai 1,65% dari fotoanoda ZnO-NR dengan konsentrasi larutan penumbuh 0,25:0,05 M yang menghasilkan diameter ZnO-NR berukuran lebih kecil sehingga berpotensi meningkatkan penyerapan dye dan memberikan performa DSSC yang lebih baik.
Determination of the Kinetic Parameters of Cholesterol Oxidation using Cholesterol Oxidase from Streptomyces sp. Perdani, Meka Saima; Hermansyah, Heri; Sahlan, Muhamad; Putri, Dwini Normayulisa; Pambudi, Teguh; Hasibuan, Anggi Khairina Hanum
Makara Journal of Technology Vol. 28, No. 3
Publisher : UI Scholars Hub

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

Abstract

Cholesterol oxidase (CO) was successfully produced from Streptomyces sp. via the submerged fermentation method, and 69 U/mL enzyme activity was obtained. This study aimed to determine cholesterol oxidation kinetics and the production of CO as a catalyst. The enzyme was diluted to 0.15, 0.075, and 0.00375 U/mL for the oxidation reaction. The substrate was also prepared in three concentrations: 3.23, 6.46, and 12.93 mM. The optimization of conditions for enzymatic cholesterol oxidation was investigated through measurement of the effect of initial cholesterol and enzyme concentrations. Cholesterol concentration was rapidly measured via high-performance liquid chromatography (HPLC). The kinetics of CO were modeled using the first-order irreversible reaction. An enzymatic kinetic model was derived, and it was verified using experimental data and sensitivity analysis. Based on the experiment, the highest enzyme concentrations of crude and commercial CO can oxidize the substrate up to 84% within 240 min. However, the oxidation reaction showed a slightly different behavior in the early 60 min, and crude CO exhibited a slower substrate oxidation. The kinetic rate constant obtained by Euler’s method reached 1.0 x 10−3/min and 1.41 x 10−3/min for 0.15 U/mL crude and commercial CO, respectively.
Efektivitas Katalis CaO/SiO2 dari Limbah Sekam Padi dan Cangkang Telur dengan Variabel Waktu Reaksi untuk Sintesis Biodiesel Sitanggang, Christin Octaviani; Perdani, Meka Saima; Umam, Hilman Imadul; Fadilla, Amalia Dian; Nurhana, Eti Ayu
Jurnal Teknik Kimia USU Vol. 15 No. 1 (2026): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v15i1.22313

Abstract

This research focusses on the synthesis of biodiesel as an altenative fuel to replace diesel oil which can be produced from vegetable oil or animal fat as renewable dan sustainable fuel. This study was conducted to determine the effect of stirring time in the manufacture of biodiesel on the effectiveness of the CaO/SiO2 catalyst from egg shell waste dan rice husks in the transesterification process. The control variables in this study were raw materials taken from rice husk waste dan chicken egg shell waste, and the mole ratio of used cooking oil: methanol used was 9:1. The variation of stirring time used was 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes with a stirring speed of 450 rpm at 65ºC. The results showed that the optimal time in this study was 150 minutes with a biodiesel yield of 63.64%.
Pengolahan Limbah Pickling PT X dengan Metode Netralisasi KOH dan Filtrasi Granular untuk Menurunkan Kadar Fe²⁺: Indonesia Aprivianti, Afif Nur; Perdani, Meka Saima; Aeni, Alfieta Rohmaful
Jurnal Sains & Teknologi Lingkungan Vol. 18 No. 1 (2026): SAINS & TEKNOLOGI LINGKUNGAN
Publisher : Teknik Lingkungan Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jstl.vol18.iss1.art10

Abstract

Pickling effluent is characterized by highly acidic conditions and elevated Fe²⁺ levels, necessitating a treatment approach capable of achieving substantial metal removal prior to environmental discharge. In this work, neutralization was performed using Potassium Hydroxide (KOH) at concentrations of 20%, 40%, and 60%, accompanied by the addition of Polyacrylamide (PAM) at volumes of 20 mL, 40 mL, and 60 mL as a coagulant–flocculant. Stirring speeds (300, 600, and 900 rpm) and mixing durations (10, 15, and 20 minutes) were varied to determine the optimal conditions for floc formation and Fe²⁺ precipitation. Following the initial neutralization–precipitation stage, samples were subjected to granular filtration using a multi‑layer media system consisting of activated carbon, activated sand, ferrolite greensand, silica sand, and zeolite. The results indicate that the combination of 60% KOH and 60 mL PAM, with a stirring speed of 900 rpm for 20 minutes, yielded the highest Fe²⁺ reduction, decreasing concentrations from 160 g/L to 46.13 g/L. Subsequent granular filtration further reduced Fe²⁺ to undetectable levels based on titration analysis. Additionally, the final effluent pH Fe²⁺ll within the neutral range, meeting applicable environmental quality standards.
Evaluasi Komprehensif terhadap Pengaruh Pra-perlakuan Alkali Berbantuan Gelombang Mikro Menggunakan Amonia pada Limbah Bonggol Nanas Ningtyas, Vita Putri; Agisriani, Agferofita; Saima Perdani, Meka; Normayulisa Putri, Dwini
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 11 No. 1 (2026): Volume 11, ISSUE 1, 2026
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol11.iss1.art11

Abstract

This study aims to comprehensively investigate the effect of microwave-assisted alkali pretreatment on delignification and changes in composition, functional groups, morphology, and crystallinity structure of pineapple core waste biomass. Pretreatment was carried out using 0.03 M ammonia solution through microwave heating at 600 W power for 5 minutes. Delignification and composition were determined using biomass compositional analysis method from the National Renewable Energy Laboratory (NREL), functional groups were characterized by Fourier Transform Infrared Spectroscopy (FTIR), surface morphology was characterized using a Scanning Electron Microscope (SEM), and crystallinity was characterized by the X-Ray Diffraction (XRD) method. The results showed that the alkali pretreatment with microwaves was able to reduce the lignin content from 23.443% to 19.71%, increase the hemicellulose content from 39.903% to 45.967%, and maintain the cellulose content at 34.317% from 36.653%. FTIR analysis showed a weakening of the lignin aromatic band and changes in the hydroxyl group. SEM analysis showed visible morphological changes in the biomass structure which was initially dense and regular to become rougher, cracked, and containing cavities. XRD analysis showed a decrease in the crystallinity index which indicates the occurrence of partial disruption of the cellulose crystal structure. Based on overall results, microwaves-assisted alkali pretreatment using ammonia showed effectiveness in influencing the characteristics of pineapple core biomass, especially in the delignification process and changes in biomass structure. Keywords: pineapple core waste, lignocellulose, alkali pretreatment, microwave-assisted, characterization
Co-Authors Agisriani, Agferofita Alfieta Rohmaful Aeni Andini, Sri ANGGI KHAIRINA HANUM HASIBUAN Aprivianti, Afif Nur Aswin Falahudin Athirah, Febriana Azhar Dampang, Sarah Dewi, Nurazizah Melani Fadilla, Amalia Dian Fauzi, Muhammad Rezal Alfian Hakim, Muhammad Fahmi Hasannah, Cintiya Septa Heri Hermansyah Hilman Imadul Umam Irfan Gustian Iskandar, Riska Listiarini Liana Wahyuni Maelan, Nabilla Maharani Malisi, Sibro Margaretha, Grace Morina Adfa Ningtyas, Vita Putri Normayulisa Putri, Dwini Nur Fadila, Salsabil Intan Nurhana, Eti Ayu Prajati, Gita Putri, Dwini Normayulisa Rahmat Hidayat SAHLAN, MUHAMAD Saiqa Ikram SALPRIMA YUDHA S Siswantito, Firgi Sitanggang, Christin Octaviani Teguh Pambudi Triawan, Deni Agus Wahyuningtyas, Aulia YULIASARI, FITRI