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All Journal VALENSI CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) CHEMISTRY PROGRESS International Journal of Science and Engineering (IJSE) Jurnal Penelitian Sains (JPS) Jurnal Kedokteran Brawijaya Jurnal Matematika & Sains Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research AGRIVITA, Journal of Agricultural Science Jurnal Penelitian Sains (JPS) IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) JPSriwijaya Indonesian Journal of Chemical Science Science and Technology Indonesia Jurnal Penelitian Sains Indonesian Journal of Chemistry Communications in Science and Technology IJEMS (Indonesian Journal of Environmental Management and Sustainability) Riau Journal of Empowerment Molekul: Jurnal Ilmiah Kimia Sains dan Matematika SRIWIJAYA JOURNAL OF ENVIRONMENT Makara Journal of Science Makara Journal of Technology Aceh International Journal of Science and Technology Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Material Research Bumi: Jurnal Hasil Kegiatan Sosialisasi Pengabdian Kepada Masyarakat

Aldes Lesbani

Universitas Sriwijaya

Author-ID : 305968

Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences

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Ekstraksi Selulosa dari Kayu Gelam (Melaleuca leucadendron Linn) dan Kayu Serbuk Industri Mebel Dian Monariqsa; Niken Oktora; Andriani Azora; Dormian A N Haloho; Lestari Simanjuntak; Arison Musri; Adi Saputra; Aldes Lesbani
Jurnal Penelitian Sains (JPS) Vol 15, No 3: Juli 2012
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (686.983 KB)

Ekstraksi selulosa dari kayu gelam (Melaleuca leucadendron Linn) dan kayu serbuk industri mebeldilakukan dengan proses maserasi menggunakan metanol dan dilanjutkan dengan pengasaman dengan asamklorida. Pengasaman dengan asam klorida dilakukan pada variasi konsentrasi 1%, 3%, 5%, 7%, 9% dan 11%(v/v). Karakterisasi selulosa hasil ekstraksi dilakukan menggunakan spektroskopi FT-IR, penentuan kadar airdan kadar abu. Hasil penelitian yang dibandingkan dengan selulosa standar menunjukkan bahwa konsentrasiasam klorida optimum untuk ekstraksi selulosa dari kayu gelam dan kayu serbuk industri mebel adalah 5%(v/v). Kadar air masing-masing 2,35% (b/b) dan 2,74% (b/b) untuk selulosa dari kayu gelam dan kayu serbukindustri mebel. Kadar abu masing-masing yakni 1,26% (b/b) untuk selulosa dari kayu gelam dan 2,44% (b/b)untuk selulosa dari kayu serbuk serbuk industri mebel.

Sintesis Senyawa Kompleks Kobalt dengan Asetilasetonato Yosi Saria; Lucyanti .; Nurlisa Hidayati; Aldes Lesbani
Jurnal Penelitian Sains (JPS) Vol 15, No 3: Juli 2012
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (234.42 KB)

Telah dilakukan sintesis dan karakterisasi senyawa kompleks kobalt(II) dengan ligan asetilasetonato. Karakterisasi senyawa kompleks hasil sintesis dilakukan dengan penentuan rendemen hasil sintesis, titikleleh, air kristal, kandungan logam, bobot molekul, jumlah ion, sifat magnet, serta identiﬁkasi menggunakanspektrofotometer infra merah. Hasil penelitian menunjukkan bahwa rendemen hasil sintesis senyawa komplekskobalt-asetilasetonato yakni 82,46% dengan titik leleh sebesar 160-162◦C. Air kristal yang terkandung dalamsenyawa kompleks sebesar dua mol/mol dengan kandungan logam kobalt didalam senyawa kompleks hasilsintesis sebesar 28,32%(b/b) dan berat molekul 192 g/mol. Senyawa kompleks hasil sintesis bersifat paramagnetik dengan tidak mempunyai ion. Vibrasi karbonil dari asetilasetonato pada senyawa kompleks hasil sintesismuncul pada bilangan gelombang 1500-1600 cm−1. Struktur senyawa kompleks hasil sintesis adalah Co(acac)2H2O.

Thermal Stability and Acidity of Silica Supported Keggin Type Polyoxometalate K4[-SiW12O40]•nH2O Welinda Me; Risfidian Mohadi; Aldes Lesbani
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 1, No 1 (2016): February 2016
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v1.i1.24

Silica supported polyoxometalate K4[a-SiW12O40]·nH2O was prepared systematically using tetraethyl ortho silicate by sol gel method to form K4[a-SiW12O40]·nH2O/Si. Compound K4[a-SiW12O40]·nH2O/Si was characterized by diffraction, spectroscopic, and acidity analyses follow by thermal activity test at higher temperature up to 600 oC. Analysis of FTIR spectrum showed all unique vibration of polyoxometalate K4[a-SiW12O40]·nH2O was appeared at wavenumber 800-1000 cm-1 before and after supporting process. Crystallinity of K4[a-SiW12O40]·nH2O and K4[a-SiW12O40]·nH2O/Si were also similar without changing Keggin structure. Compound K4[a-SiW12O40]·nH2O/Si showed higher acidity than K4[a-SiW12O40]·nH2O probably due to Lewis acidity species. Keggin structure of K4[a-SiW12O40]·nH2O/Si was still retained up to 600 oC showing thermal stability of K4[a-SiW12O40]·nH2O/Si at high temperature.Keyword : Keggin polyoxometalate, tetraethyl ortho silicate, thermal stability, acidity

PENYULUHAN PENGOLAHAN BEBERAPA JENIS BUAH MENJADI JELLY DAN SIRUP DI DESA KARYA JAYA Aldes Lesbani
Jurnal Pengabdian Sriwijaya Vol 1, No 1 (2013)
Publisher : Lembaga Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37061/jps.v1i1.1544

Selama musin buah, harga buah menjadi sangat murah. Buah yang telah matang dan jumlah yang berlimpah menyebabkan nilai jual yang rendah, karena buah tidak biasa disimpan dalam waktu lama apabila telah matang. Pengabdian ini adalah tentang 16utrid penyuluhan pada warga desa Karya Jaya mengenai pengolahan buah. Tim pengabdian juruan Kimia MIPA UNSRI telah mengajarkan dan mempraktekkan cara membuat sirup dan jeli dari buah-buahan di desa Karya Jaya pada bulan November 2013. Buah yang dipilih untuk di peragakan adalah buah nenas, dan buah mangga. Tim pengabdian juga memberikan fotokopi cara-cara mengolah buah-buahan agar dapat disimpan lebih lama dalam bentuk produk. Acara pengabdian diikuti oleh ibu-ibu rumah tangga dan remaja 16utrid desa. Warga yang hadir adalah 35 orang dan aktif berpartisipasi dalam kegiatan ini.

Bentonite intercalated organometallic complex as adsorbent of procion red Lora Vitanesa; Radja Nardo Purba; Aldes Lesbani; Muhammad Said
Science and Technology Indonesia Vol. 2 No. 1 (2017): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Insertion of bentonite with organometallic compounds [Cr3O(OOCH)6(H2O)3 (NO3)]as adsorbent of procion red with comparison weight ratio of bentonite: organometallic compounds [Cr3O(OOCH)6(H2O)3 (NO3)] i.e.: (2.5:1), (1:1), (1:2) and (1:3) has been done. The results of insertion bentonite were characterized using FT-IR spectrophotometer, XRD, and XRF. Furthermore, the product of optimum insertion was used as an adsorbent of procion red. The spectrogram from FT-IR shows the process of insertion was not optimum for every weight ratio. Characterization using XRD showed the optimum insertion process ratio (1:2) and (1:3) was indicated the presence of diffraction appearing at 2θ region by a shift in the diffraction angles 5.00 and 39o from the original activated bentonite of 20.8o. Characterization using XRF analysis in the ratio (1:3) shows percentage of metal oxide Cr2O3 increase to 82.28%, so at the ratio of 1:3, the process insertion of organometallic compounds into the bentonite has stated success base on its highest percentage. The adsorption process of insertion bentonite organometallic compounds [Cr3O(OOCH)6(H2O)3 (NO3)] ratio (1: 3) shows the magnitude of the rate of adsorption (k) at 0.004 min-1, the adsorption capacity (b), the largest at a temperature of 70oC at 72.99 mol/g, the largest adsorption energy (ΔG) at a temperature of 60oC i.e. 17.05 kJ / mol, the largest enthalpy (ΔH) is 105720.8 kJ/mol, entropy (ΔS) 315 kJ/mol and pH 11 has the biggest value of procion red adsorped, i.e. 33.38 mg/L. Keywords: Bentonite, Organometallic compound [Cr3O(OOCH)6(H2O)3(NO3)].Adsorption, Procion Red

Preparation, characterization, and thermal stability of B2O3-SiO2 Winda Fitriana; Aldes Lesbani
Science and Technology Indonesia Vol. 2 No. 1 (2017): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Preparation of B2O3-SiO2 compound by inorganic synthesis was carried out. B2O3-SiO2 was characterized by FT-IR spectro-photometer, analysis of crystallinity by XRD, and test of acidity. B2O3-SiO2 was also tested by thermal stability with temperature range at 300-700 ⁰C. The results showed that the FT-IR spectrum of B2O3-SiO2 has some vibrations of B-O, Si-O-Si, Si-O-B stretching, and Si-O-B bending at 1442.8 cm-1, 779.2 cm-1, 925.8 cm-1, and 648.1 cm-1. The X-Ray diffraction pattern results showed that the analysis of B2O3-SiO2 has high crystallinity with two peaks diffraction identified at 26.6⁰ and 20.9⁰. The thermal stability test of B2O3-SiO2 showed that B2O3-SiO2 has high thermal stability with temperature range at 300-700 ⁰C. The results showed that the acidity analysis of B2O3-SiO2 has potential number 122.71 mV so that indicated B2O3-SiO2 was high acidity. Keywords : boric oxide, silica dioxide, boric silica, B2O3-SiO2

Thermal stability effect of H4[PVMo11O40]/SiO2 Leni Sinaga; Aldes Lesbani
Science and Technology Indonesia Vol. 2 No. 1 (2017): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Synthesis and characterization of supported polyoxometalate H4[PVMo11O40].nH2O with SiO2 through sol-gel method have been done. The compound H4[PVMo11O40]/SiO2 was characterized through FT-IR spectrophotometer, XRD, and SEM-EDX. The results showed that FT-IR spectrum of H4[PVMo11O40]/SiO2 has the primary vibration on wavenumber at 1064.7 cm-1 (P-O); 964.4 cm-1 (Mo=O); 864.1 cm-1 (Mo-Oe-Mo); 779.2 cm-1 (Mo-Oc-Mo); 462.9 cm-1 (Si-O); and 1087.9 cm-1 (Si-O-Si). The XRD diffraction pattern showed that H4[PVMo11O40].nH2O has the highest crystallinity. However, after it’s supported with SiO2, the properties of crystallinity has decreased due to the excess water during the support process. The result of SEM-EDX showed that H4[PVMo11O40]/SiO2 material has homogeneous distribution with particle size distribution of 1330 nm (1,33 μm). The acidity test by qualitative and quantitative methods show that H4[PVMo11O40]/SiO2 more acidic than H4[PVMo11O40].H2O. The effect temperature on the crystallinity showed that increasing calcination temperature made the crystallinity properties of H4[PVMo11O40]/SiO2 increased. Keywords : polyoxometalate, H4[PVMo11O40].nH2O, SiO2.

Synthesis and characterization of metal oxides supported keggin type polyoxometalate Rb2K2[-H2SiV2W10O40].nH2O Eiffel Ostan Jeski Gultom; Aldes Lesbani
Science and Technology Indonesia Vol. 2 No. 2 (2017): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Synthesis of material based on polyoxometalate Rb2K2[γ-H2SiV2W10O40].nH2O with SiO2, TiO2, ZrOCl2, and TaCl5 was carried out to form Rb2K2[γ-H2SiV2W10O40].nH2O-SiO2, Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 Rb2K2[γ-H2SiV2W10O40].nH2O-ZrOCl2 and Rb2K2[γ-H2SiV2W10O40].nH2O-TaCl5. Materials from preparation were characterized through functional group analysis using FT-IR spectrophotometer, crystallinity analysis using XRD and surface photograph analysis using SEM. The results show that material Rb2K2[γ-H2SiV2W10O40].nH2O was successfully loaded with SiO2, ZrOCl2 and TaCl5. Based on SEM photo Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 and Rb2K2[γ-H2SiV2W10O40].nH2O-ZrOCl2 were the best material from preparation base on the homogeneity particle distribution. The FT-IR spectrum shows specific wavenumber for nanomaterial Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 in the range 455-910 cm-1 and Rb2K2[γ-H2SiV2W10O40].nH2O - ZrOCl2 in the range 393.48-1404 cm-1. XRD pattern for material Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 and Rb2K2[γ-H2SiV2W10O40].nH2O-ZrOCl2 show there is a difference between polyoxometalate Rb2K2[γ-H2SiV2W10O40].nH2O, TiO2 and ZrOCl2. SEM photo analysis of Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 and Rb2K2[γ-H2SiV2W10O40].nH2O-ZrOCl2 showed that material polyoxometalate with support has a diameter size of particle above 100 nm. Keywords: Rb2K2[γ-H2SiV2W10O40].nH2O, polyoxometalate, SiO2, TaCl5, TiO2, ZrOCl2.

Pillarization of layer double hydroxides (Mg/Al) with keggin type K4[α-SiW12O40]•nH2O and its application as adsorbent of procion red dye Intan Permata Sari; Muhammad Said; Aldes Lesbani
Science and Technology Indonesia Vol. 2 No. 3 (2017): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Pillarization of layered double hydroxides with polyoxometalate K4[α-SiW12O40]•nH2O at various times i.e. 3, 6, 9, 12, 24, 36 and 48 hours has been done. The pillared product was characterized by FT-IR spectrophotometer and XRD. The optimum pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O was used as an adsorbent of procion red dye. The results of characterization using FT-IR spectrophotometer is not yet show the optimum pillarization process. The characterisation using XRD the successfully of pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O showing the existence of diffraction angle 8.5o with intensity 355. Furthermore, the pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O with time variation of 12 hours was applied as an adsorbent of procion red dye. The results show the adsorption rate was 0.523 min-1, the highest of absorption capacity at 70oC was 10.8 mol/g, the highest energy of absorption 70 oC was 125 kJ/mol. The enthalpy (∆H) and entropy (∆S), decrease as the increasing concentration of procion red dye. Keywords: layered double hydroxides, polyoxometalate, pillaration, procion red, adsorption

Conversion of cyclohexane to cyclohexanol and cyclohexanone using H3[PMo12O40].nH2O-ZrOCl2 as catalyst Eriza Sativa; Aldes Lesbani
Science and Technology Indonesia Vol. 2 No. 3 (2017): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Synthesis and preparation polyoxometalate compound H3[-PMo12O40].nH2O supported with ZrOCl2 at various weights of ZrOCl2 i.e. 0.25 g, 0.50 g, 0.75 g, 1.00 g, 1.25 g, 0.01 g and 0.05 g to form H3[-PMo12O40].nH2O/ZrOCl2 have been conducted. These compound than was characterized through functional group analysis using FT-IR spectrophotometer and XRD analysis. The results showed that the optimal preparation was H3[-PMo12O40].nH2O/ZrOCl2 with support 0.05 g. FT-IR spectrum of H3[-PMo12O40].nH2O/ZrOCl2 show wavenumber at 1033.85 cm-1 for vibration P-O, 887.26 cm-1 for vibration M=O, 840.96 cm-1 and 655.80 cm-1 for vibration Mo-O-Mo. The existence of support was identified at wavenumber 1404.18 cm-1for vibration Zr-OH and 478.35 for vibration Zr-O-Zr. XRD powder analysis showed that material H3[-PMo12O40].nH2O/ZrOCl2 was amorphous material. Material H3[-PMo12O40].nH2O/ZrOCl2 was applied in oxidation of cyclohexane using hydrogen peroxide as oxidant. Oxidation process was optimized through reaction time H2O2 amount, temperature and catalyst weight. The results showed that the highest conversion in the using of H3[-PMo12O40].nH2O/ZrOCl2 catalyst found at 2 hours reaction time, 3 mL H2O2, 80oC temperature and 0.038 g catalyst with conversion 99.18 %. Selectivity of best reaction was 6.96 % for cyclohexanol and 24.9% for cyclohexanone, which was identified by GC-MS. Keywords : H3[-PMo12O40].nH2O-ZrO2,cyclohexane, cyclohexanol, cyclohexanone.

Co-Authors A. Agnes Abi Sueb Abriyanto, Danang Addy Rachmat Adi Saputra Adi Saputra Adi Saputra Adi Saputra Afifah Rahma Dian Ahmad Fatoni Ahmad Fatoni Alfan Wijaya Alfan Wijaya Alfan Wijaya Amiruddin Supu Amri Amri Amri Andi Wijaya Andreas, Roy Andriani Azora Andriani Azora Anggraini, Ana Arini Fousty Badri Arini Fousty Badri Arison Musri Arison Musri Arsyad, Fitri Suryani Aslihati Aslihati Aslihayati Aslihayati Azhar Kholiq Badri, Arini Fousty Bakri Rio Rahayu Bakri Rio Rahayu Benyamin Lakitan Dedi Rohendi Dedi Setiabudidaya Desnelli Desnelli Dian Monariqsa Dian Monariqsa Didi Jasantri Dormian A N Haloho Dormian A N Haloho Eiffel Ostan Jeski Gultom Elfita Elfita . Elfita Elfita Eliza . Eliza Eliza Eliza Eliza Ema Veronika Turnip Endri Junaidi Eriza Sativa Erviana, Desti Fahma Riyanti Fatmawati Fatmawati Ferlinahayati Ferlinahayati Fitri Suryani Arsyad Fitri, Erni Salasia Fitriliana Fitriliana Hanifah, Yulizah Haris Kriswantoro Hermansyah Hermansyah Hermansyah Hermansyah Hesti A. Harahap Hesti A. Harahap, Hesti Hidayatullah, Muhammad Hilda Zulkifli Hilda Zulkifli Hilda Zulkifli Hiroshi Nishihara Hitoshi Kondo Idha Royani Intan Permata Sari Irfannuddin Irfannuddin Jasantri, Didi Jefri Jefri Jeri Ramadhan Juleanti, Novie Kiki Anggraini Kiki Anggraini Kiki Anggraini, Kiki Komis Krisna Murti Laila Hanum Leni Sinaga Lestari Simanjuntak Lestari Simanjuntak Liasari, Beta Riana Lingga, Fitra Wahyuni Lora Vitanesa Lucyanti . Lucyanti Lucyanti Lusi Teresia Mardianto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto, Marieska Verawaty Mariska Verawaty Melantina Melan Oktriyanti Melwita, Elda Menik Setyowati Mikha Meilinda Christina Miksusanti Miksusanti Muhammad Imron MUHAMMAD SAID Muhammad Said Muhammad Said Muhammad Said Najma Annuria Fithri Najma Annuria Fithri Najma Annuria Fithri Najma Annuria Fithri, Najma Annuria Narsito Narsito Neza Rahayu Niken Oktora Niken Oktora Nirwan Syarif Normah Normah Normah Normah, Normah Nova Yuliasari Novie Juleanti Novie Juleanti Novie Juleanti Nur Ahmad Nur Ahmad, Nur Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nur’aini, Siti Nyanyu Ummu Hani Palita Tamba Patimah Mega Syah Bahar Nur Siregar Patimah Mega Syah Bahar Nur Siregar Patimah Mega Syah Bahar Nur Siregar Poedji Loekitowati Hariani Putri Erlyn Putri, Bunga Indah R.A. Mika Melviana Rabelia Juladika Sayeri Radja Nardo Purba Rakhmawati Farma Ramadhan, Jeri Rananda Vinsiah Randi O. Saragih Ratna, L.P Ratna, L.P Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risma Kurniawati M Rohmatullaili Rohmatullaili, Rohmatullaili Roy Andreas Sabat Okta Ceria Sitompul, Sabat Okta Ceria Samat Samat Savira, Dila Setiawan Yusuf Setiawati Yusuf Setiawati Yusuf Sherly Agustina, Sherly Siregar, Patimah Mega Syah Bahar Nur Sitanggang, Jonra P. Soerya, Balada Sri Juari Santosa Suheryanto Suheyanto Suheryanto Sumiati Sumiati SUMIATI, Susila Arita Syaflina Lamin Syafrina Lamin, Syafrina Tamizi Taher Tarmizi Taher Welinda Me Wibiyan, Sahrul Wijaya, Alfan Winda Fitriana Yeni Iswanti Yoshinori Yamanoi Yosi Saria Yosi Saria Yosi Saria Yosine Susi Yosine Susie Yunita Irianty Zahara, Zaqiya Artha Zazili Hanafiah Zultriana

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