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Ekstraksi Ubi Jalar Ungu (Ipomoea batatas L.) Menggunakan Variasi Pelarut Serta Pemanfaatannya Sebagai Indikator Asam-Basa Afandy, Moh. Azhar; Nuryanti, Siti; Diah, Anang Wahid M.
Jurnal Akademika Kimia Vol 6, No 2 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (452.915 KB)

Purple sweet potato (ipomoea batatas L.) is one source of carbohydrate. Purple sweet potato contains vitamins and minerals that needed by humans such as vitamin A, vitamin C, calcium, and iron. The sweet potato with purple flesh is widely used as natural dyes which are called anthocyanins. The study aim was to determine a suitable solvent to extract the purple sweet potato. Variation of solvent used namely methanol, methanol acidified with HCl 1% and solvent fractionation (n-hexane, ethyl acetate, and methanol). The extraction phase was divided into two, for flesh and for the skin of the purple sweet potato. The extraction results were then compared with phenolphthalein indicator and a methyl orange on acid-base titration. The results showed that the methanol acidified with HCl 1% provided a more stable color changes in acid-base testing, and the testing of phosphate buffer pH 1-12. Purple sweet potato extracts can be used as an acid-base indicator because it gave similar results with comparative indicators, phenolphthalein, and methyl orange.

The Processing of Glycerol with Acetone to Produce Solketal Using Amberlite IR 120 Na Catalyst: Comparison of solketal Production Using Gas Chromatography Fikrah D. I. Sawali; Hary Sulistyo; Wahyudi B. Sediawan; Moh. A. Afandy
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

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Solketal is a chemical that can be made by combining glycerol with acetone. This compound can be used as a fuel oil additive to improve the cold flow properties of liquid transportation fuels, reduce specific emissions, aid in the reduction of gum formation (oil sap), increase oxidation stability, and increase the octane number by up to 2.5 points to accelerate the initiation process in motor fuel combustion. The addition of solketal, a bio-additive material in biodiesel, is expected to reduce emissions from diesel engines. Solketal can reduce glycerol waste created from biodiesel synthesis in addition to reducing resultant emissions because glycerol waste can be used as the primary raw material in the process manufacture of the solketal. The purpose of this research is to find out The catalytic process of glycerol and acetone using Amberlite IR 120 Na catalyst was traced using gas chromatography analysis. Solketal formation analysis using gas chromatography was used in this study. According to the results of gas chromatography analysis, the solketal produced without going through the distillation process has a purity of 23.54%, while the solketal produced after going through the distillation process has a purity of 38.94% when compared to the synthetic solketal produced by Sigma Aldrich, which has a purity of 95.67%. To manufacture solketal with a higher level of purity, the batch method was improved by adding a distillation process step to remove the water content and acetone that was still present in the sample.

Studi Kinetika dan Penentuan Dosis Optimum Koagulan FeCl3 dalam Menurunkan Konsentrasi Cu2+ pada Larutan Muhammad Seachan Fadila; Moh. Azhar Afandy; Suhirman Suhirman; Muhammad Iqbal Al Fuady
REACTOR: Journal of Research on Chemistry and Engineering Vol 4, No 2 (2023): Published in December 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v4i2.100

This study aims to determine the efficiency and adsorption capacity of various concentrations of FeCl3 coagulants (100-300 mg/L) to reduce Cu2+ concentrations in wastewater as well as the kinetic parameters that affect the adsorption mechanism in the coagulation process when coagulant particles added to wastewater will stick to the surface of colloidal particles, which will then change the charge. Several adsorption kinetics models employed in this study include Pseudo-first order, Pseudo-second order, Elovich, and Intra-particle diffusion. The applicability of the models produced in this work was evaluated by optimizing the non-linear equations, which provide values that are more precise and in agreement with real situations when compared to the linear kinetic models. These characteristics are measured based on the value of the coefficient of correlation (R2), Sum Square Error (SSE), and Chi-Square (x2). The results showed that the highest efficiency value of the FeCl3 coagulant was 98.705%, with the value of the adsorption capacity increasing along with the concentration of the FeCl3 coagulant. The kinetic model created in this work has a very excellent fit in terms of experimental data values and prediction data.

The Processing of Glycerol with Acetone to Produce Solketal Using Amberlite IR 120 Na Catalyst: Comparison of solketal Production Using Gas Chromatography Fikrah D. I. Sawali; Hary Sulistyo; Wahyudi B. Sediawan; Moh. A. Afandy
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

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

Solketal is a chemical that can be made by combining glycerol with acetone. This compound can be used as a fuel oil additive to improve the cold flow properties of liquid transportation fuels, reduce specific emissions, aid in the reduction of gum formation (oil sap), increase oxidation stability, and increase the octane number by up to 2.5 points to accelerate the initiation process in motor fuel combustion. The addition of solketal, a bio-additive material in biodiesel, is expected to reduce emissions from diesel engines. Solketal can reduce glycerol waste created from biodiesel synthesis in addition to reducing resultant emissions because glycerol waste can be used as the primary raw material in the process manufacture of the solketal. The purpose of this research is to find out The catalytic process of glycerol and acetone using Amberlite IR 120 Na catalyst was traced using gas chromatography analysis. Solketal formation analysis using gas chromatography was used in this study. According to the results of gas chromatography analysis, the solketal produced without going through the distillation process has a purity of 23.54%, while the solketal produced after going through the distillation process has a purity of 38.94% when compared to the synthetic solketal produced by Sigma Aldrich, which has a purity of 95.67%. To manufacture solketal with a higher level of purity, the batch method was improved by adding a distillation process step to remove the water content and acetone that was still present in the sample.

STUDI ISOTHERM ADSORPSI CU(II) DALAM LARUTAN MENGGUNAKAN ZEOLIT TERAKTIVASI Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawari
JURNAL TEKNOLOGI KIMIA MINERAL Vol 3 No 1 (2024): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Politeknik ATI Makassaar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61844/jtkm.v3i1.755

Proses penghilangan logam berat khususnya Cu(II) menjadi salah satu solusi dari permasalahan pencemaran lingkungan yang terjadi akibat dari kegiatan industri. Adsorpsi menjadi salah satu metode yang efisien dan efektif dalam mengatasi permasalahan tersebut karena mudah untuk dioperasikan dan tidak memerlukan biaya yang tinggi. Penelitian ini dilakukan dengan memanfaatkan zeolit alam sebagai adsorben dengan proses aktivasi secara fisika dengan suhu 105 oC selama 4 Jam untuk tahap pengeringan dan tahap kalsinasi menggunakan tanur dengan suhu 550 oC selama 2 Jam. Selain itu, penelitian ini juga bertujuan untuk mempelajari mekanisme adsorpsi yang terjadi antara molekul Cu(II) dengan adsorben zeolit berdasarkan parameter dari beberapa model isotherm antara lain: Langmuir, Freundlich, Temkin, Jovanovic, dan Harkin-Jura. Hasil menunjukkan bahwa model isotherm Langmuir cocok untuk mendeskripsikan proses adsorpsi yang terjadi dengan nilai koefisien korelasi (R2) = 0,9542, qmax= 1,0375 mg.g-1, KL = 0,5463 L.mg-1, dan RL = 0,3210-0,9959. Berdasarkan model isotherm Langmuir, dapat disimpulkan bahwa proses adsorpsi Cu(II) oleh zeolit terjadi secara monolayer pada permukaan adsorben yang homogen.

Effectiveness of the Combination of Alum (Al₂(SO₄)₃) and Calcium Hydroxide (Ca(OH)₂) Coagulants in the Removal of Manganese (Mn) Using the Coagulation-Flocculation Process Samuel Putra Mandiri Simanullang; Moh. Azhar Afandy; Fikrah Dian Indrawati Sawali
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 2 (2024): October 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i2.4301

A technique for reducing the contamination of heavy metals in wastewater is the coagulationflocculation method. The approach has various advantages, including a simple process, readilyavailable chemicals, inexpensive equipment costs, and an excellent capacity to remove pollutants. The goal of this research is to see how well Mn-containing wastewater can be reduced using alum and calcium hydroxide as coagulants. The adsorption capacity of the coagulant combination in the floc generation phase of the coagulation-flocculation process can also be calculated. The technique used is coagulation-flocculation, with modifications made to the coagulant content and stirring duration. The data was then evaluated using an Atomic Absorption Spectrophotometer (AAS) to assess the decrease Mn concentration in wastewater. According to the experiments, the combination of alum and calcium hydroxide coagulants with a mass composition ratio of alum:calcium hydroxide (150 mg:50 mg) and a stirring time of 15 minutes has the highest efficiency of 89.35% and is directly proportional to the adsorption capacity value of 446.75mg/gram.

EFFECT OF CONCENTRATION ON KINETICS AND THERMODYNAMICS PARAMETER IN THE Cu (II) REMOVAL BY ACTIVATED ZEOLITE Moh. Azhar Afandy; Fikrah Dian Indrawati Sawali
JURNAL INTEGRASI PROSES Vol 13, No 2 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i2.25316

Adsorption is a commonly used technique for removing heavy metals, particularly Cu (II), due to its efficiency, cost-effectiveness, simple operation, high stability, and excellent selectivity. This study aims to investigate the impact of varying Cu (II) concentrations on the kinetic and thermodynamic parameters during the adsorption process. The adsorption of Cu (II) by activated zeolite was conducted in several batches, using various initial concentrations (20-120 mg/L) and for varied operating time (30-180 minutes). Various kinetic models have been used to evaluate kinetic rate parameters and maximum adsorption capacity, calculated using linear regression equations. Thermodynamic studies were conducted at different temperatures (303-318 K). The study's results indicate that the concentration has a comparable impact on Cu (II) adsorption by activated zeolite, suggesting a pseudo-second-order equation. As the concentration of Cu (II) increases, so do the adsorption capacity (qe) and adsorption rate. At a Cu (II) concentration of 120 mg/L, the adsorption capacity and rate were the maximum, with qe= 5.6054 mg/g, k2 = 64.2279 g.mg-1.min-1, and Coefficient Correlation value (R2) = 0.9998. The ΔG° value suggests that the adsorption process happens spontaneously and through physical adsorption. On the other hand, the ΔH° value reveals that it happens endothermic.

Extraction of Natural Colorant from Clitoria ternatea Flowers Using Conventional Solvent Extraction (CSE) and Ultrasound-Assisted Extraction (UAE) Techniques: Kinetic Modeling and Compound Stability Pra Cipta Buana Wahyu Mustika; Hadiyatni Rita Priyantini; Eryan Dwi Krisna; Firman Aldani; Fikrah Dian Indrawati Sawali; Moh Azhar Afandy; Mega Mustikaningrum
Jurnal Kimia Sains dan Aplikasi Vol 27, No 11 (2024): Volume 27 Issue 11 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.11.549-559

The Clitoria ternatea flowers, a prevalent local commodity in Indonesia, are extensively found, particularly in the East Java region. One approach to enhance the utility and economic significance of these flowers involves isolating their active component, specifically anthocyanin. Anthocyanins have several health benefits, especially in preventing cardiovascular disease, improving vision, and being anti-diabetic, anti-inflammatory, and anti-cancer. The isolation methods used in this research were conventional solvent extraction (CSE) and ultrasonic-assisted extraction (UEA) methods. The use of UAE has been experimentally proven to accelerate the extraction rate of bioactive compounds. This dal is caused by a driving force in the form of energy produced from bubble cavitation resulting from ultrasonic energy. The specific aim of this study was to compare the effectiveness of the two methods in anthocyanin isolation. The extraction stages were carried out at 30, 40, 50, 60, and 70°C operating temperatures, with an S/L ratio of 1:10, 1:15, 1:20:1:25, and 1:30 with samples conditioned in dry and wet conditions. The optimal conditions for ultrasound-assisted extraction (UEA) involve dry samples with a S/L ratio of 1:30 at a temperature of 70°C with the resulting final concentration of 16.5234 g/L. This configuration ensures an efficient extraction process, completed in less than 30 minutes, thereby preventing the degradation of anthocyanins. Analysis indicates that the extraction process adheres to a second-order kinetic model with a constant (k) of 0.1039. Stability testing revealed that the first–order kinetic model accurately represents the impact of temperature on anthocyanin degradation.

PENGARUH TEKANAN TRANSMEMBRAN PADA NILAI PERMEANCE DALAM PROSES PEMISAHAN SENYAWA PROANTHOCYANIDIN MENGGUNAKAN METODE DEAD-END MEMBRAN ULTRAFILTRASI Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawati; Siswanto, Yudi
JURNAL TEKNOLOGI KIMIA MINERAL Vol 1 No 2 (2022): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Politeknik ATI Makassaar

Salah satu jenis teknik pemisahan dengan menggunakan membran yakni teknologi yang menggunakan perbedaan tekanan sebagai gaya pendorong yang memiliki beberapa keunggulan antara lain efisiensi yang tinggi, pemisahan yang lebih selektif, mudah untuk di scale up, hemat energi, serta suhu dan tekanan operasi yang lebih aman. Tujuan dari penelitian ini yakni mengetahui pengaruh tekanan transmembran terhadap nilai permeance dari proses ultrafiltrasi senyawa proanthocyanidin dengan metode filtrasi dead-end. Jenis membran yang digunakan yakni membran Polyethersulfone (PES) dengan ukuran MWCO yang berbeda yakni 50 kDa dan 30 kDa. Hasil yang diperoleh dari penelitian ini menunjukkan bahwa tekanan transmembran akan mempengaruhi nilai permeance dimana ketika tekanan transmembran dinaikkan maka akan mengakibatkan turunnya nilai permeance dikarenakan tingginya nilai pressure drop, begitupun sebaliknya ketika tekanan transmembran diturunkan maka akan menaikkan nilai permeance karena nilai pressure drop yang cenderung lebih kecil.

Pelatihan Peningkatan Kompetensi Bidang Pengolahan Mineral Pada Karyawan Di Kawasan PT. Indonesia Morowali Industrial Park Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawati; Septiawan, Muhammad Ridwan; Rahman, Arif
Jurnal Pengabdian Masyarakat AKA Vol 4, No 1 (2024): Juni 2024
Publisher : Politeknik AKA Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55075/jpm-aka.v4i1.234

Banyaknya peluang kerja di Kawasan Industri Morowali tidak diimbangi dengan kualifikasi tenaga kerja yang dibutuhkan. Kebutuhan akan tenaga kerja yang melonjak mengakibatkan tenaga kerja yang direkrut tidak sesuai dengan bidang yang digeluti. Berdasarkan permasalahan tersebut, Program Studi Teknik Kimia Mineral Politeknik Industri Logam Morowali berinisiatif melaksanakan Program Pengabdian kepada Masyarakat berupa kegiatan pelatihan yang diperuntukkan kepada karyawan di ruang lingkup PT. Indonesia Morowali Industrial Park (IMIP). Kegiatan ini berupa pelatihan peningkatan kompetensi di bidang pengolahan mineral dimana bentuk kegiatan yang dilaksanakan yakni knowledge sharing serta penyampaian materi yang diharapkan dapat memberikan keterampilan dan keahlian dasar terkait pengolahan mineral kepada karyawan di ruang lingkup Kawasan PT IMIP. Berdasarkan hasil analisa evaluasi pelaksanaan pelatihan peningkatan kompetensi bidang pengolahan mineral secara keseluruhan, maka dapat disimpulkan agar kegiatan ini tetap dapat dilaksanakan pada batch selanjutnya dengan kelompok peserta yang berbeda dan lanjutan seri materi pelatihan yang sesuai kebutuhan peserta. Hal ini sesuai dengan testimoni peserta pelatihan yang pada umumnya menjawab bahwa pelatihan selanjutnya tetap diadakan dengan menyusun materi yang benar-benar sesuai kebutuhan praktis pekerjaan di industri.

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