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All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI Jurnal Bahan Alam Terbarukan Seminar Nasional Teknik Kimia Kejuangan Elkawnie Indonesian Journal of Science and Technology Konversi Info-Teknik Buletin Profesi Insinyur International Journal of Advance Tropical Food (IJATF) Jurnal Teknik Kimia dan Lingkungan Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Sains Materi Indonesia JURNAL REKAYASA KIMIA & LINGKUNGAN

Iryanti Fatyasari Nata, Iryanti Fatyasari

Department Of Chemical Engineering, Faculty Of Engineering, University Of Lambung Mangkurat

Author-ID : 579853

Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology

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Aplikasi membran ultrafiltrasi termodifikasi untuk penyediaan air bersih layak konsumsi di Desa Jambu Burung Kalimantan Selatan Agus Mirwan; Doni Rahmat Wicakso; Abdul Ghofur; Iryanti Fatyasari Nata
Buletin Profesi Insinyur Vol 3, No 1 (2020): Buletin Profesi Insinyur (Januari-Juni)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/bpi.v3i1.62

Jambu Burung merupakan salah satu desa di wilayah Kecamatan Beruntung Baru Kabupaten Banjar Kalimantan Selatan dengan lingkup wilayah disekitar bantaran sungai dan pesisir pantai yang belum memiliki akses air bersih dari perusahaan daerah air minum. Selama ini, masyarakat terbiasa menggunakan air sungai dan air sumur untuk kebutuhan sehari-hari dengan kondisi masih jauh dari layak untu dikonsumsi. Teknologi membran ultrafiltrasi memiliki beberapa keunggulan diantaranya dapat memisahkan spesifikasi kimia secara spesifik, beroperasi pada suhu ambient, tidak destruktif, hemat energi, dan tidak mencemari lingkungan. Kegiatan ini bertujuan untuk menerapkan teknologi membran ultrafiltrasi termodifikasi untuk menghasilkan air bersih layak konsumsi bagi masyarakat Desa Jambu Burung. Teknologi yang diaplikasikan terdiri dari rangkaian modul membran, empat buah filter sedimen polipropilen, dan pompa sehingga prosesnya sederhana, praktis, mudah dioperasikankan, dan mudah dipindah-tempatkan (mobile). Hasil analisis kualitas air melalui proses membran ultrafiltrasi termodifikasi berdasarkan parameter fisika dan kimia menunjukkan bahwa tidak ada bau, 112 mg/L total zat padat terlarut (TDS), kekeruhan 2 NTU, warna 0,0135 TCu, suhu 27,2 oC, daya hantar listrik 103 Âµs/cm, pH 6,74. Sedangkan kesadahan, besi, mangan, zat organik, dan total fosfat, serta total bakteri koliform menunjukkan angka nol dan diartikan semua parameter telah memenuhi baku mutu yang disyaratkan dalam Peraturan Menteri Kesehatan Republik Indonesia nomor 492 tahun 2010.Kata kunci: air sungai, air sumur, air bersih, baku mutu, membran ultrafiltrasi termodifikasi

Utilization of Rice Husk Cellulose as a Magnetic Nanoparticle Biocomposite Fiber Source for the Absorption of Manganese (Mn2+) Ions in Peat Water Emil Zacky Effendi; Yudhi Christian Hariady; Muhammad Daffa Salaahuddin; Chairul Irawan; Iryanti Fatyasari Nata
Jurnal Kimia Sains dan Aplikasi Vol 22, No 6 (2019): Volume 22 Issue 6 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Rice husk (RH) is an agricultural waste that contains cellulose. Rice husk fiber (RHF) can be used as a source of fiber in the manufacture of magnetic nanoparticle biocomposite. The purpose of this study is to synthesize and characterize magnetic nanoparticle biocomposite used as an adsorbent and evaluate its performance on the adsorption of Mn2+ ions and Total Suspended Solid (TSS) in peat water. Rice husk fiber was delignified to eliminate lignin levels. Furthermore, the biocomposite was made through the solvothermal method with and without the addition of hexanediamine. The products produced are two types of adsorbents, namely magnetic nanoparticle biocomposite with an amino group (RHB-MH) and rice husk fiber biocomposite without an amino group (RHB-M). These biocomposites were used to adsorb Mn2+ ions in peat water. Evaluations were carried out at pH 5, 6, 7, and 8 with an optimum adsorption time of 60 minutes. The solutions at the time of adsorption were evaluated to determine the optimum conditions of the adsorption process carried out. The observation of magnetic nanoparticle biocomposite based on the analysis of Scanning Electron Microscopy (SEM) shows magnetic nanoparticles formed on the surface of rice husk fiber with a diameter of 30-50 nm. X-Ray Diffraction (XRD) analysis showed that the delignification of rice husk increased Crystallinity Index (CrI) by 64.98% and reduced silica content by 78%. Fourier Transform Infra-Red (FT-IR) spectrometer show absorption peak at 570 cm-1 for Fe-O bonds and Fe3O4 peak around 1627 cm−1, indicating the presence of N-H bending. The optimum condition for Mn2+ adsorption was achieved at pH 5 and 60-minutes duration with an adsorption capacity of 54.7 mg/g and 190.78 mg/g for RHB-M and RHB-MH. The TSS reduction achieved the effectiveness of 60.2% and 90.3% for BSP-M and BSP-MH, respectively.

Rice Husk Demineralization: Effect of Washing Solution on Its Physicochemical Structure and Thermal Degradation Hesti Wijayanti; Iryanti Fatyasari Nata; Chairul Irawan; Rinny Jelita
Jurnal Kimia Sains dan Aplikasi Vol 24, No 2 (2021): Volume 24 Issue 2 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Generally, biomass consists of various amounts of minerals. These minerals influence the biomass characteristics and behavior during their use in a thermochemical process such as pyrolysis. The conversion during pyrolysis and its final product will be affected. This research was carried out to study the impact of washing treatment in water and acid solutions on the rice husk as the raw material for pyrolysis. Also, the effect of acid strength (citric acid as the weak acid while nitric acid as the strong acid) and its concentration (1, 5, and 10 wt.%) was investigated. The results confirmed from the thermogravimetry (TGA/DTG) analysis, surface analysis (SEM), and spectra (FTIR) analysis describe the treatment using water caused less change on the rice husk surface structure and its thermal degradation. However, it seems hard to reduce the minerals (proved from XRF analysis). Meanwhile, the treatment using acids solution resulted in lower mineral composition than the rice husk without treatment. This result is more visible for demineralization using a 5 wt.% nitric acid solution. However, for a higher concentration (washing treatment using 10 wt.% solutions of nitric acid), the degradation on rice husk structure was more occurred.

Bioethanol Production from Cassava Peel Treated with Sulfonated Carbon Catalyzed Hydrolysis Primata Mardina; Chairul Irawan; Meilana Dharma Putra; Sylvera Bella Priscilla; Misnawati Misnawati; Iryanti Fatyasari Nata
Jurnal Kimia Sains dan Aplikasi Vol 24, No 1 (2021): Volume 24 Issue 1 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

A large amount of Cassava peel as biomass waste is generated by agricultural activities, and it led to a new pursuit to exploit the utilization of biomass waste. This research aimed to study the potential of Cassava peel as raw material for bioethanol production. This study was performed in 2 main processes, acid hydrolysis, and fermentation. The experiment was initiated by conducting acid hydrolysis (100°C and 60 min) on Cassava peel’s starch using sulfonated carbon catalyst palm oil empty fruit bunch (5%-w/v) to produce 13.53 g/L glucose. The glucose contained hydrolysates then continued to ferment at 30°C. The effect of fermentation time (h), pH, and shaking rate (rpm) of cassava peel’s starch fermentation using Saccharomyces cerevisiae was analyzed. The best result was found at pH 4.5 and 50 rpm for a 24 h reaction with 3.75 g/L of bioethanol concentration. This study revealed that Cassava peel is a promising feedstock for biofuel production.

Potential Alternative Energy of Hybrid Coal from Co-pyrolysis of Lignite with Palm Empty Fruit Bunch and the Kinetic Study Rinny Jelita; Iryanti Fatyasari Nata; Chairul Irawan; J. Jefriadi; Meda Nur Anisa; Muhammad Jauhar Mahdi; Meilana Dharma Putra
Indonesian Journal of Science and Technology Vol 8, No 1 (2023): IJOST: April 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i1.53149

Lignite is classified as a low-rank coal due to its low content of calories. Co-pyrolysis with biomass waste such as palm empty fruit bunches (EFB) here can be used to increase lignite’s economic value. The mixture of these two materials can produce an alternative energy source called hybrid coal (HC). This study aims to determine the optimum temperature for co-pyrolysis of lignite and EFB as well as characterize liquid (tar) and solid product (HC). Its kinetic study was evaluated as well. A raw material of 200 grams with a composition of 22.5% (w/w) EFB to lignite was put into a reactor to react at a temperature range of 300-450oC for 1 hour. To form hybrid coal briquettes (HCB),tapioca adhesive with a concentration of 6% (w/w) was added to the solid product (HC). The results showed that the tar yield increased with increasing temperature from 300 to 450oC. Similarly, the calorific value of HC increased by 14.50% as also occurred in other physical properties of HC. Meanwhile, the kinetic study revealed that the model was well-fitted to the data, and confirmed the obtained results. Thus, this research can support the development of affordable alternative energy to be implemented in large-scale production.

Hydrogel Films Derived Water Hyacinth Stems And Banana Peels Pectin: Tensile Performance And Swelling Ability Retno Febriyanti; Muthia Elma; Iryanti Fatyasari Nata; Ni Kadek Devi Ananda Saraswati; Paskah Fransiska Afrida Simatupang
Elkawnie: Journal of Islamic Science and Technology Vol 9, No 1 (2023)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v9i1.16419

Abstract: Hydrogel films are sheet materials that form a 3D network structure and can be fabricated from one or more constituent materials. A combination of two natural polymers, namely carboxymethyl cellulose (CMC) derived from water hyacinth stems (WHS) and banana peel pectin, constructs these hydrogel films that are used as coating materials for food packaging. Citric acid replenishment to stabilize the cross-linking of the hydrogel films. This study is intended to determine the effect of WHSCMC, pectin, and citric acid on the swelling abilities and tensile performances of hydrogel films. CMC synthesis begins with harvesting water hyacinth stems obtained from the Gambut area waters in South Kalimantan, Indonesia. Then carried out the extraction and bleaching processes of cellulose. Cellulose extract powder was processed in two stages, videlicet alkalization and carboxymethylation, to obtain cellulose derivatives in the form of CMC. The results of WHSCMC were analyzed using FT-IR (Fourier Transform Infra-Red) and compared with commercial CMC. Giving results with significant similarity at the peaks of 998 cm-1 and 1015 cm-1, specifically the ether glycosidic group. Fabrication of hydrogel films combines WHSCMC and banana peel pectin with various compositions (100:0, 90:10, 70:30, and 50:50 wt.%) with added citric acid as an aid for crosslinking at various concentrations (5, 10, and 15 wt.%). Hydrogel films sample 70:30, 5 wt.% (CPc-5) gave optimum results from the characterization of hydrogel films related to food packaging application coatings in the form of swelling ability of 6,647 g/g, tensile strength of 11,770 MPa, and elongation test of 11,896%. FT-IR analysis of CPc-5 indicates that there are carboxyl groups (COO-) and hydroxyl groups (-OH), which play a role in the formation of cross-links and hydrophilic properties.Abstrak: Film hidrogel merupakan material lembaran yang membentuk struktur jaringan 3D dan dapat dibuat dari satu atau lebih bahan penyusun. Kombinasi dua polimer alami, yaitu karboksimetil selulosa (CMC) yang berasal dari batang eceng gondok (BEG) dan pektin kulit pisang membentuk film hidrogel yang digunakan sebagai bahan pelapis kemasan makanan. Penambahan asam sitrat untuk menstabilkan ikatan silang film hidrogel. Penelitian ini bertujuan untuk mengetahui pengaruh CMC BEG, pektin, dan asam sitrat terhadap kemampuan pembengkakan dan kinerja kekuatan tarik film hidrogel. Sintesis CMC diawali dengan pemanenan batang eceng gondok yang diperoleh dari perairan daerah Gambut, Kalimantan Selatan-Indonesia. Kemudian dilakukan proses ekstraksi dan pemutihan selulosa. Serbuk ekstrak selulosa diproses dalam dua tahap yaitu alkalisasi dan karboksimetilasi untuk mendapatkan turunan selulosa berupa CMC. Hasil CMC BEG dianalisis menggunakan FT-IR (Fourier Transform Infra-Red) dan dibandingkan dengan CMC komersial. Hasil yang diperoleh adalah adanya kemiripan pada puncak 998 cm-1 dan 1015 cm-1, yaitu gugus eter glikosidik. Pembuatan film hidrogel mengkombinasikan CMC BEG dan pektin kulit pisang dengan berbagai komposisi (100:0, 90:10, 70:30, dan 50:50 % berat) dengan penambahan asam sitrat sebagai pengikat silang dengan berbagai konsentrasi (5, 10, dan 15 % berat). Sampel film hidrogel 70:30, 5% (CPc-5) memberikan hasil optimum dari karakterisasi film hidrogel terkait pelapis aplikasi kemasan makanan berupa uji kemampuan pembengkakan sebesar 6,647 g/g, kuat tarik 11,770 MPa, dan elongasi sebesar 11,896%. Analisis FT-IR terhadap CPc-5 menunjukkan adanya gugus karboksil (COO-) dan gugus hidroksil (-OH) yang berperan dalam pembentukan ikatan silang dan sifat hidrofilik.

Mild Nitric Acid Treatments to Produce Nitrocellulose from Kapok Fiber (Ceiba Pentandra) Fitriannoor Fitriannoor; Hesti Wijayanti; Rinna Juwita; Iryanti Fatyasari Nata
Jurnal Bahan Alam Terbarukan Vol 12, No 1 (2023): June 2023 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v12i1.42156

Kapok (Ceiba pentandra) is one of the natural fibrous sources with a high content of cellulose. The natural kapok used contains 54.3% of cellulose, 11.3% of hemicellulose, and 19.11% of lignin. Kapok is a potential material to be explored by isolating the fiber, then converting into nitrocellulose. The effect of nitric acid concentration on the nitration process and characterization of material were investigated. Kapok fiber was isolated by delignification and bleaching process. Delignification was done in the presence of 5% (w/v) of NaOH and 30% (v/v) of H2O2 for alkaline and acid hydrothermal treatment, respectively. Kapok was washed until neutral pH and dried in an oven at 100 oC for 4 h to get kapok fiber (CK). For the nitration process, CK 5% (w/w) was added to a solution of 15% (v/v) phosphoric acid and variation of 15%, 20%, and 25% of nitric acid. The mixture was stirred at 10 oC, 300 rpm, for 30 min. The solid CK was separated and poured into hot water for 5 min and continuously washed with demineralized (DI) water and sodium hydrogen carbonate until neutral pH. The nitrocellulose (KN) was produced after the material dried. The smooth surface of fiber and diameter around 14.5-19.1 Âµm was changed into a plat fiber of 13.3-21.2 Âµm after hydrothermal treatment. The crystallinity index (CrI) of CK was increased up to 58.17% based on X-Ray Diffraction (XRD) observation. The degree of substitution (DS) was calculated by data spectra of Fourier Transform-Infra Red (FT-IR) analysis of a specific functional group for N-O and C-O stretching vibrations. The DS optimum value was achieved at about 0.885 at concentration of 20% nitric acid (NK20). The synthesis of nitrocellulose kapok fiber-based has potential as a functional material.

Aluminum Waste as Electrode for Home Textile Industry Wastewater Treatment using Batch Electrocoagulation Process: Studies on Operating Parameters Chairul Irawan; Ridhayanti Mu'minah; Agita Purnawilda; Iryanti Fatyasari Nata
Jurnal Sains Materi Indonesia Vol. 25 No. 2 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.3120

The manufacture of the Sasirangan home textile industry involves coloring and dyeing processes using synthetic dyes in large quantities. These contaminants of dyes and organic materials would cause high color and chemical oxygen demand (COD) contaminants values. This study aims to characterize the wastewater of batik-modified Sasirangan and determine the effect of current density and length of operating time on color removal and reduction of COD in Sasirangan home textile industry wastewater through the batch electrocoagulation process. The method used in this research is an electric current flowing in the same direction to the Sasirangan home textile industry wastewater in a reactor with dimensions of 310 180 240 mm3. The electrode used is aluminum alloy type 1100. The aluminum/aluminum (Al/Al) electrode is used in this electrocoagulation (EC) process, then connected to a direct current (DC) power supply. The experiment was carried out at room temperature using an electrode distance of 2 cm with variations in the time of the electrocoagulation process for 15–120 minutes. The experiment was repeated for variations in pH (4–9) with a current density of 3.5–5.5 mA/cm2. Furthermore, an analysis of the color removal and the decrease in the concentration of COD was carried out. The results showed that the contaminant content in Sasirangan home textile industry wastewater decreased significantly, whereas the optimal conditions for the EC reaction were determined using color and COD removal efficiency parameters. The decrease in color and COD concentrations occurred at a current density of 5.5 mA/cm2 with a pH of 4 for 120 minutes, around 1110 PtCo and 90.4 mg/L of COD, respectively

Kinetic Study of Co-pyrolysis of Kelakai (Stenochlaena palustris) and Low-rank Coal (Lignite) Fadhillah, Hilda Nur; Wijayanti, Hesti; Mardina, Primata; Juwita, Rinna; Nata, Iryanti Fatyasari; Putra, Meilana Dharma; Madani, Zikri Daffa Aulia; Hendrawan, Rangga Dwi
Jurnal Teknik Kimia dan Lingkungan Vol. 9 No. 2 (2025): October 2025
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtkl.v9i2.7195

Recently, fossil fuels have still become a main source of energy and chemicals. Biomass conversion has become a promising technology to convert biomass into bio-energy and bio-chemicals. Kelakai, as a potential biomass, is abundant in wetland areas such as Kalimantan (Indonesia) and many other Asian regions, so that low-rank coal (lignite). Co-pyrolysis, the combined pyrolysis of biomass and lignite, is an attractive technique considering to its potential to enhance the efficiency of pyrolysis products. In this study, the thermal decomposition behavior and kinetic of co-pyrolysis of kelakai and lignite at various mass ratio composition (1:0, 3:1, 1:1, 1:3, and 0:1) were investigated. The experiments were performed on a thermogravimetric analyzer (TGA). The TGA result indicated that the kelakai highly decomposed at 257-400℃, while lignite was 286-500℃. Their blends were in between. In addition, thermogravimetric data were subsequently applied to a kinetic analysis based on the Arrhenius equation, with a first-order reaction. The kinetic analysis results, including activation energy and pre-exponential factor, were determined for the kelakai and lignite mixture were found to be in the range of 10.22-10.98 kJ/mol and 0.0651-0.1351 min-1, respectively. Knowledge of thermal decomposition characteristics of kelakai and its kinetics is essential for optimizing pyrolysis design. The co-pyrolysis kelakai and lignite resulted in the highest bio-oil yield of 26.86 wt% at the ratio of 0:1 and the lowest yield of 12.51 wt% for the ratio of 1:0, when using mixed ratios of kelakai and lignite, the highest yield was 24.60% (1:3) and the lowest yield was 21.18 wt% (1:1).

Biopolymer of Chitosan from Fish Scales as Natural Coagulant for IronContaminated Groundwater Treatment Irawan, Chairul; Nata, Iryanti Fatyasari; Putra, Meilana Dharma; Marisa, Rosmasari; Asnia, Mira; Arifin, Yulian Firmana
Jurnal Rekayasa Kimia & Lingkungan Vol 13, No 2 (2018): Jurnal Rekayasa Kimia & Lingkungan (December, 2018)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v13i2.10601

Chitosan, the de-acetylated chitin derivative, was evaluated for its ability to be used as a natural coagulant for Martapura groundwater treatment. This study is used chitosan derived from original fish scales of Kalimantan called Papuyu (Anabas testudineus) for the treatment of iron ion-containing Martapura groundwater through coagulation-flocculation method. The reduction efficiency of iron ion removed by coagulation-flocculation processes using chitosan from Papuyu fish scales is the primary evaluating parameter. The obtained chitosan have been characterized and analyzed by Fourier transforms infrared spectroscopy (FTIR), X-ray Fluroscence (XRF) and Scanning electron microscopy (SEM). Using of the chitosan from Papuyu fish scales as coagulant at neutral pH and room temperature led to decreasing the groundwater iron concentration become 3.43 mg/L (around 71% removal). The result was then compare to the coagulation-flocculation treatment using the commercial chitosan from shrimps shell (93% deacetylated). Moreover, its found the coagulation-flocculation treatment using the chitosan from fish scales as coagulant more favor than the commercial one.

Co-Authors Abdul Ghofur Aceng Lesti Agata Febby Ayuningtyas Agita Purnawilda Agus Mirwan Aladin Eko Purkuncoro Anis Artiyani Asnia, Mira Azzahra, Atina Sabila Chairul Irawan Choir Muizliana Choir Muizliana, Choir Denis Yanuardi Dewi, Heny Puspita Dian Sylvana Ansari Dian Sylvana Ansari, Dian Sylvana Doni Rahmat Wicakso Edi Mikrianto Emil Zacky Effendi Fadhillah, Hilda Nur Fitri Halisyah Fitriannoor Fitriannoor Gita Cristy Helda Niawati Helda Niawati, Helda Hendrawan, Rangga Dwi Herlina Herlina Herlina Herlina Hesti Wijayanti Hesti Wijayanti Hesti Wijayanti I Putu Andika Putra I Putu Andika Putra, I Putu Andika Jayanudin Jayanudin Jefri A. Simanjuntak Jefriadi Jefriadi Jody Hartoto Prayogo Jody Hartoto Prayogo, Jody Hartoto Kiky Corneliasari Sembiring Lalu Mustiadi Madani, Zikri Daffa Aulia Marisa, Rosmasari Masrurotul Ajiza Meda Nur Anisa Meilana Dharma Putra Mira Asnia Mira Pangesti, Mira Misnawati Misnawati Muhammad Daffa Salaahuddin Muhammad Jauhar Mahdi Muthia Elma Nanik Astuti Rahman Ni Kadek Devi Ananda Saraswati Noor Laila Nooryantini Nooryantini Nor Asiyah Norlina Norlina, Norlina Paskah Fransiska Afrida Simatupang Primata Mardina Primata Mardina Retno Febriyanti Ridhayanti Mu'minah Rinna Juwita Rinna Juwita Rinny Jelita Ristiarini, Susana Rita Khairina Rodiansono Rodiansono Rosmasari Marisa Selly Agustina Sunnardianto, Gagus Ketut Syamsul Ma"arif Putera Ukhrawi Sylvera Bella Priscilla Toni Arianto Toni Arianto, Toni Tri Dianpalupidewi Tun Sriana Tun Sriana Yudhi Christian Hariady Yuli Ristianingsih Yulia Nurul Ma'rifah Yulian Firmana Arifin Yuniza Shentiya Dewi Yuniza Shentiya Dewi Zakaria Zakaria

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