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All Journal Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Sriwijaya International Seminar on Energy-Environmental Science and Technology JPSriwijaya Jurnal Penelitian Sains Indonesian Journal of Chemistry Communications in Science and Technology Molekul: Jurnal Ilmiah Kimia Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat SRIWIJAYA JOURNAL OF ENVIRONMENT Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi Aceh International Journal of Science and Technology Ahsana: Jurnal Penelitian dan Pengabdian kepada Masyarakat Bulletin of Chemical Reaction Engineering & Catalysis
Fahma Riyanti
Department Of Chemistry, Faculty Of Mathematics And Natural Science, Sriwijaya University
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Effect of Calcination Temperature on The Synthesis of Silica from Bagasse Poedji Loekitowati Hariani; Fahma Riyanti; Desneli Desneli; Fatma Fatma; Sabila Yunita; Muhammad Said
The Journal of Pure and Applied Chemistry Research Vol 10, No 2 (2021): Edition May-August 2021
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2021.010.02.587

Abstract

Bagasse is the solid waste derived from the sugar-making process. A large amount of silica in bagasse is a potential source of silica. In this study, extraction of silica from bagasse was carried out in the following steps: pretreatment of bagasse using HCl solution, followed by calcination at varying temperatures (700℃, 800℃, and 900℃) using a furnace. Furthermore, extraction using NaOH solution and precipitation using HCl. Silica characteristics were obtained using X-Ray Diffraction (XRD), Scanning Electron Microscopy-Electron Dispersive Spectrometry (SEM-EDS), and BET surface area. The results showed that calcination temperature affected the characteristics of the silica produced. The silica extracted at 700℃ produced an amorphous phase with a broad peak at an angle of 2θ = 20-24°. It contained the most considerable silica content and surface area, 42.46% and 796.89 cm2/g, respectively. The extracted silica had an average diameter of 5.67 mm and a pore volume of 1.184 cm3/g.
Study of Effect of Weight Ratio on Copolymerization of Chitosan and Acrylamide Eliza Eliza; Desnelli Desnelli; Ady Mara; Fahma Riyanti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 6, No 3 (2021): October 2021
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v6.i3.96

Abstract

The use of chitosan as adsorbent in wastewater treatment has received a lot of attention. This is because the price of chitosan is cheap and easy to obtain. The application of chitosan as an adsorbent has the disadvantage of being soluble in acidic medium (pH <6.5), insoluble in water and organic solvents. Other disadvantages of chitosan are low adsorption capacity, and lack of selectivity. In this research, chitosan copolymer synthesis with acrylamide has been carried out by varying chitosan and acrylamide, namely 1:1, 2: 3 and 3: 2 using a microwave oven. The copolymers were characterized using FTIR, XRD, SEM and TGA/DTA. The results of the synthesis of chitosan copolymer with acrylamide were obtained the largest percentage of grafting at a ratio of 2: 3.  From the results of FTIR analysis showed that the copolymer had been successfully synthesized. XRD analysis showed that the copolymers synthesized have amorphous properties compared to chitosan. The results of SEM analysis, the copolymers had a porous structure. Thermal analysis showed that the copolymers have better thermal stability than chitosan. The chitosan-acrylamide copolymer which was synthesized in a ratio of 2: 3 has better properties.
The influence of time reaction to characteristic of methyl ester sulfonate from seed oil ketapang Poedji Loekitowati Hariani; Fahma Riyanti; Ahyati Fadilah
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.i1.14

Abstract

The aim of the present work was to The Preparation of Methyl Ester Sulfonate From Ketapang Seed Oil As Surfactant. The research is to determine the optimum condition synthesis of methyl ester sulfonate surfactant with reaction time variations (3.5; 4.0; 4.5; 5.0; 5.5 hours). The methyl ester from ketapang seed oil were analysis by GC-MS and identified methyl ester sulfonate by using FTIR spectroscopy. The methyl ester from ketapang seed oil showed containing of methyl palmitoleic, methyl linoleic, methyl palmitate, methyl stearate, methyl oleic, methyl palmitolenat and methyl eicosenoate. The optimum condition of methyl ester sulfonate at reaction time 4.5 hours with the mass of methyl ester sulfonate 34,85 g. For the FTIR spectra of sulfonate group is indicated  by shifting of wave number at 1118.71cm-1 until 1029.1 cm-1. The characteristics of methyl ester sulfonate at the optimum reaction time have emulsion stability 71.684%, density 0.8714 g/mL, surface tension 36.232 dyne/cm, and maximum absorbance 1.428 at the maximum wavelength 660 nm. Keywords: Surfactant, methyl ester sulfonate, time reaction, ketapang seed oil
Fixed-Bed Column for the Removal of Cd(II) from Aqueous by Hydroxyapatite from Red Snapper (Lutjanus campechanus) Fish Bone Widia Purwaningrum; Fahma Riyanti; Muhammad Said; Poedji Loekitowati Hariani; Aria Septi Handayani
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 6, No 2 (2021): June 2021
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v6.i2.46

Abstract

The Synthesis of hydroxyapatite from Red Snapper (Lutjanus campechanus) fish bone carried out. Hydroxyapatite is utilized for Cd(II) sorption from solution using a fixed-bed column. Hydroxyapatite was characterized using X-ray Diffraction, Fourier Transform Infra-Red, Scanning Electron Microscope-Electron Dispersive, and Thermogravimetric. In fixed-bed column, the influence of bed height (5, 10, 15 cm) and flow rate (6, 8 and 10 mL/min) were studied. The highest adsorption capacity is obtained at a bed height of 15 cm, and a flow rate of 6 mL/min with adsorption capacity is 47.027 mg/g. The predicted by Bed Depth Service Time (BDST) model obtained that value of R2 in the range 0.9964-0.9997. The adsorption capacity per unit volume ( is in the range 141.12-222.89 mg/L while  is in the range 0.0136-0.022 L/mg h. This indicates that BDST can be used to explain the performance of Cd(II) sorption onto hydroxyapatite by fix-bed column.
Properties of Magnetite-Chitin Composite as Materials Fahma Riyanti
Sriwijaya International Seminar on Energy-Environmental Science and Technology Vol 1, No 1 (2014)
Publisher : Sriwijaya International Seminar on Energy-Environmental Science and Technology

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

Abstract

In this study, magnetite-chitin composite has been synthesized and their apllication for removal Ni(II) from aqueous solution. Chitin synthesized from shrimp shell waste. Magnetite-chitin composite were prepared by reaction of Fe2+ and Fe3+ ion and NH4OH in the presence of chitin. Fourier Transform Infra Red (FTIR), Scanning Electron Microscopy-Energy Dispersive X Ray Spectroscopy (SEM-EDX) and Vibrating Sample Magnetometer (VSM) were used to characterize the adsorbent. The effect of composite dosage, pH and contact time on the adsorption capacity of the adsorbent has also been investigated. The FTIR spectra of magnetite-chitin composite confirmed the successful synthesis which the adsorption peak at 586.3 cm-1 assigned to Fe-O bond. SEM-EDX characterization of magnetite-chitin composite indicated that the surface of composite more solid than chitin and elements of composit contained of magnetite and chitin elements. The magnetite-chitin composite has magnetic properties which the saturation magnetization was 11.27 emu/g. The optimal adsorption of magnetite-chitin composites an initial concentration of Ni(II) was 50 mg/L attained within 3 g of composite dosage, pH value 5 and contact time of 45 minutes with a maximum adsorption capacity of Ni(II) was 37.81 mg/g.
PEMBUATAN INSTALASI UNTUK BIOGAS DARI ENCENG GONDOK (EICHHORNIA CRASSIPES ) YANG EFISIEN UNTUK LAHAN KECIL Fahma Riyanti
Jurnal Pengabdian Sriwijaya Vol 3, No 1 (2015)
Publisher : Lembaga Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37061/jps.v3i1.2144

Abstract

Teknologi biogas telah berkembang sejak lama namun aplikasi penggunaannya di masyarakat sebagai sumber energi alternatif belum berkembang secara luas. Beberapa kendala antara lain yaitu kekurangan informasi dan pengetahuan dari masyarakat. Teknologi biogas merupakan teknologi yang memanfaatkan proses fermentasi atau dekomposisi dari bahan organik oleh mikroorganisme secara anaerobik (tanpa udara) sehingga dihasilkan gas metana. Gas metana adalah gas yang memiliki sifat mudah terbakar sehingga dihasilkan energi panas. Energi panas ini diaplikasikan dalam bentuk api kompor sehingga dapat dimanfaatkan sebagai bahan bakar alternatif rumah tangga. Salah satu bahan organik yang bisa digunakan sebagai bahan baku adalah enceng gondok. Enceng gondok merupakan tumbuhan air dan sering menjadi tanaman pengganggu bagi tumbuhan lain dan hewan. Namun kandungan selulosanya yang besar sehingga tanaman ini dapat dimanfaatkan sebagai sumber biogas. Proses pembuatan Biogas dari enceng gondok menggunakan  reaktor digester dari drum plastik dan penampung gas dari plastik polietilen dengan sistem balon. Sedangkan sumber mikroorganisme yang dapat mendekomposisi enceng gondok digunakan kotoran sapi. Jumlah kotoran sapi yang digunakan± 1-5% dari jumlah enceng gondok yang digunakan. Sedangkan perbandingan  banyaknya  air yang digunakan dengan  enceng gondok adalah 1 : 1. Waktu yang dibutuhkan untuk proses dekomposisi enceng gondok sehingga penampung  gas bervolume ± 1000L dapat penuh sekitar 3 minggu. Jumlah enceng gondok sekitar 70 kg dapat menghasilkan gas untuk keperluan memasak selama 50 hari. Keberhasilan pembuatan bahan bakar biogas dari enceng gondok ini diharapkan dapat membantu kesulitan masyarakat memperoleh bahan bakar untuk keperluan rumah tangga.
PEMBUATAN ECO ENZIM DARI LIMBAH RUMAH TANGGA SEBAGAI CAIRAN DENGAN BERBAGAI MANFAAT DI DESA BURAI KECAMATAN TANJUNG BATU KABUPATEN OGAN ILIR Fahma Riyanti
Jurnal Pengabdian Sriwijaya Vol 9, No 1 (2021)
Publisher : Lembaga Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37061/jps.v9i1.17360

Abstract

Eco enzim merupakan cairan fermentasi dari sisa buah dan sayuran. Pengabdian Kepada Masyarakat di desa Burai dengan topik pembuatan Eco Enzim dari limbah rumah tangga dengan berbagai manfaat sudah dilaksanakan pada tanggal 2 Oktober 2021. Kegiatan dilaksanakan di kantor desa Burai. Beberapa metode yang digunakan pada pelaksanaan kegiatan dengan cara penyuluhan, praktek cara pembuatan, tanya jawab dan pembagian eco enzim. Penyuluhan berisikan tentang manfaat apa saja yang bisa diperoleh dari eco enzim untuk kehidupan sehari hari terutama untuk kesehatan seperti penyembuhan penyakit kulit dari luka benda tajam, luka bakar, alergi dan lain lain. Penyuluhan cara pembuatan diikuti dengan praktek langsung pembuatan dan menjelaskan bahan organik apa saja yang bisa digunakan dan yang tidak bisa serta penyebab kegalalan yang mungkin terjadi untuk proses fermentasi anaerob. Bahan organik yang digunakan  pada praktek pembuatan eco enzim saat ini jeruk lemon, kulit nanas, dan buah mengkudu. Semua bahan sudah dicuci bersih dan dipotong potong. Mengkudu yang digukan yang berwarna kuning tetapi masih keras. Eco enzim yang dibuat bisa dipanen tanggal 2 Januari 2021. Warga sangat antusias mengikuti kegiatan penyuluhan ini dilihat dari jumlah peserta yang hadir dan banyaknya pertanyaan yang diajukan.
Preparation of NiFe2O4 Nanoparticles by Solution Combustion Method as Photocatalyst of Congo red Poedji Loekitowati Hariani; Muhammad Said; Addy Rachmat; Fahma Riyanti; Handayani Citra Pratiwi; Widya Twiny Rizki
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 3 Year 2021 (September 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.3.10848.481-490

Abstract

NiFe2O4 nanoparticles had been successfully synthesized by solution combustion method using urea fuel (organic precursor). The synthesized NiFe2O4 were characterized by X-ray diffraction (XRD), Scanning electron microscopy-Electron Dispersive X-ray Spectroscopy (SEM-EDs), Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red (FTIR), Vibrating Sample Magnetometer (VSM), UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS), and Point of Zero Charge (pHpzc). NiFe2O4 nanoparticles irradiated with visible light were employed to degrade Congo red dye with the following variable: solution pH (3–8), H2O2 concentration (0.5–3 mM), and Congo red concentration (100–600 mg/L). XRD analysis results showed that the NiFe2O4 nanoparticles had a cubic spinel structure. The particle sizes are in the range of 10–40 nm. The magnetic properties of NiFe2O4 nanoparticles determined using VSM showed a magnetization saturation value of 47.32 emu/g. UV-Vis DRS analysis indicated that NiFe2O4 nanoparticles had an optical band gap of 1.97 eV. The success of synthesis was also proven by the EDS analysis results, which showed that the synthesized NiFe2O4 nanoparticles composed of Ni, Fe, and O elements. The removal efficiency of Congo red dye was 96.80% at the following optimum conditions: solution pH of 5.0, H2O2 concentration of 2 mM, Congo red dye concentration of 100 mg/L, and contact time of 60 min. The study of the photodegradation kinetics follows a pseudo-first order reaction with a rate constant value of 0.0853 min−1. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Removal of Pb(II) using Hydroxyapatite from Golden Snail Shell (Pomacea canaliculata L.) Modified with Silica Poedji Loekitowati Hariani; Fahma Riyanti; Fatma Fatma; Addy Rachmat; Aldi Herbanu
Molekul Vol 15, No 2 (2020)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (430.136 KB) | DOI: 10.20884/1.jm.2020.15.2.641

Abstract

The composites of hydroxyapatite and SiO2 were successfully synthesized. The hydroxyapatite was prepared from golden snail shells (Pomacea canaliculata L). The hydroxyapatite and hydroxyapatite-SiO2 composites were characterized using XRD, FTIR, SEM-EDS. Furthermore, hydroxyapatite and hydroxyapatite-SiO2 composites were used to remove Pb(II) from aqueous solution. Various adsorption parameters such as pH of the solution, contact time, and initial Pb(II) concentration were used to study the adsorption process. The optimum pH of the solution for removal of Pb(II) by hydroxyapatite and hydroxyapatite-SiO2 composite at pH 6 and contact time at 60 minutes. Both adsorbents follow the Langmuir isotherm. The maximum adsorption capacity of the hydroxyapatite-SiO2 composite is greater compare to hydroxyapatite, respectively 135.14 and 123.46 mg/g. The pseudo-second order kinetic model had a correlation coefficient (R2) greater than the pseudo-first order so pseudo-second order kinetic is better to describe adsorption kinetics
Extraction of Cellulose from Kepok Banana Peel (Musa parasidiaca L.) for Adsorption Procion Dye Poedji Loekitowati Hariani; Fahma Riyanti; Riski Dita Asmara
Molekul Vol 11, No 1 (2016)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (558.577 KB) | DOI: 10.20884/1.jm.2016.11.1.202

Abstract

The aim of the research was to extract a cellulose from kepok banana peel (Musa parasidiaca L.) and application to removal Procion dye. The extracted cellulose was prepared by dewaxing process to releasing of lignin, bleaching and hemicellulose removal. The cellulose identified by FTIR and SEM-EDS. The efficiency of the cellulose to adsorp Procion dye was evaluated by variation in the initial concentration of dye (5, 10, 15, 20, 25, 30, 35, 40, 45 and 50 mg/L), solution pH (3, 4, 5, 6, 7, 8 and 9), and the contact time (15, 30, 45, 60, 75 and 90 minutes) at room temperature. The result showed that FTIR spectra of cellulose from kepok banana peel were similar with FTIR spectra of standardcellulose. The morphology of cellulose more homogenous than kepok banana peel powder. It was observed that the optimum adsorption of Procion dye by cellulose was on the initial concentration of 30 mg/L, pH solution of 5 and contact time within 30 minutes. The obtained result that cellulose has removal percentage to adsorp Procion dye more higher than kepok banana peel powder. The adsorption equilibrium showed the Langmuir isotherm was described well for adsorption process (R2 = 0.991) than Freundlich isotherm (R2 = 0.922).
Co-Authors Addy Rachmat Ady Mara, Ady Afrilianza Afrilianza Ahyati Fadilah Al Muttaqii, Muhammad Aldes Lesbani Aldi Herbanu Aria Septi Handayani Asri, Wan Ryan Bijak Riyandi Ahadito Catur D. L. Catur D. L. Christina A Christina A Desneli Desneli Desnelli Desnelli Elfita Elfita Eliza Eliza Eliza Eliza Fatma Fitri Hadiah Handayani Citra Pratiwi Hariani*, Poedji Loekitowati Hasanudin Hasanudin Heni Oktaviani Hery Widijanto Hesti Ratnasari, Hesti Iqlima Amelia Julinar Julinar Kiki Anggraini Kiki Anggraini, Kiki Mannan, Muhammad Ramdan Abdul Maryana, Roni Muhammad Ramdan Abdul Mannan Muhammad Said Muhammad Said Musifa, Eva Mustafa Kamal Mustafa Kamal Nino Rinaldi Nirwan Syarif, Nirwan Nova Yuliasari Nova Yuliasari Nova Yuliasari Novia Novia Nurlisa Hidayati Palita Tamba Poedji L. H. Poedji L. H. Poedji Loekitowati H Poedji Loekitowati H Poedji Loekitowati Hariani Pudji Lukitowati Puji Lukitowati Rahmawati, Rahmawati Ratna, L.P Ratna, L.P Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Riski Dita Asmara Rizki, Widya Twiny Sabila Yunita Safira, Vika Putri Shella Santika Damarril Siti Chodijah Uswati, Dinii Widia Purwaningrum Wiwin Sepriani