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All Journal IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Jurnal Penelitian Sains Communications in Science and Technology EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup ALKIMIA : Jurnal Ilmu Kimia dan Terapan Aceh International Journal of Science and Technology Prosiding Seminar Nasional Unimus
Ady Mara, Ady
Jurusan Kimia, Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Engineering Environmental Science Health Professions Mathematics Nursing Physics Public Health Social Sciences

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PENGARUH VARIASI TEMPERATUR HIDROCRACKING TERHADAP INDEKS BIAS PRODUK HIDROCRACKING MINYAK JARAK PAGAR DENGAN KATALIS Mo-ZAA Syahputri, Yulian; Mara, Ady
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.862 KB)

Abstract

This research aim to determine the influence of hydrocracking temperature variation to refraction index of hydrocracking castor oil product by using Mo-active natural zeolite catalyst. Hydrocracking process of castor oil was conducted with variation of temperature 250oC, 300oC, 350oC, 400oC, 450oC, 500oC and 550oC, whereas the flow rate of hydrogen gases 3.5 mL/min and the weight of catalyst 1.5 g. The refraction index of hydrocracking product of castor oil was analysed by using refractometer instrument. The result of this research showed that the best value of refraction index was 1.4681 which operated at 300oC temperature of hydrocracking. Key words : hydrocracking, catalyst, castor oil, refraction index
Studi Interferensi Kimia pada Penentuan Cu, Ca dan Cd dengan Metode AAS Suheryanto Suheryanto; Bambang Yudono; Ady Mara; F. Oesman F. Oesman
Jurnal Penelitian Sains No 1 (1996)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1869.126 KB) | DOI: 10.56064/jps.v0i1.221

Abstract

Telah diteliti adanya interferensi posfat (PO43-) pada logam Cu, Ca dan Cd; AlO2 pada Ca; As2O3- pada Cu; SiO2 pada Cd. Dalam penelitian dipelajari juga pengaruh larutan EDTA dan Lantunam untuk mengatasi interferensi tersebut. Hasil penelitian menunjukkan bahwa PO43- memberikan interferensi pada Ca, Cu dan Cd pada kisaran konsentrasi rendah 0,20 – 0,50 ppm. Interferensi AlO2 terhadap Ca terjadi pada konsentrasi 0,2 ppm, interferensi SiO2 terjadi pada interferensi 0,2 ppm. Secara umum interferensi tersebut dapat diatasi dengan penambahan larutan Lantinum dan EDTA masing-masing dengan konsentrasi 1000 ppm. Kecuali interferensi AlO2- pada Ca tidak dapat diatasi dengan penambahan EDTA.
Pengaruh Perbandingan Berat Aktivator Zncl2: Batubara Terhadap Porositas Karbon Aktif Dari Batubara Subbituminus Hasanudin Hasanudin; Ady Mara; Esti Efrita
Jurnal Penelitian Sains No 12 (2002)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5119.259 KB) | DOI: 10.56064/jps.v0i12.388

Abstract

Penelitiantentang pengaruh perbandingan berat aktivator ZnCl2 : batubara terhadap porositas karbon aktif batubara subbituminus asal Tanjung Enim dilakukan dengan metode aktivasi fisika dan aktivasi. Zat yang dilakukan sebagai aktivator dalam aktivasi kimia adalah ZnCl2. Perbandingan berat ZnCl2 : batubara dalam penelitian ini adalah 0 : 1; ),5 : 1; 1 : 1; 1,75 : 1 dan 2,5 : 1. Proses karbonisasi dilakukan pada temperatur tetap yaitu 500°C. Produk karbon aktif dianalisa porositasnya dengan menggunakan alat Gas Sorption Analizer NOVA-1000. Porositas karbon aktif yang dikukr tersebut meliputi luas permukaan, total volume pori dan rata-rata jari-jari pori dengan metode adsorpsi gas. Hasil analisa menunjukkan bahwa luas permukaan maksimum pada perbandingan 1 : 1, sebesar 831,37 m2/g, kemudian total volume pori maksimum dicapai pada perbandingan 1,75 : 1, sebesar 460,74x10-3 cm3/g. Rata-rata jari-jari pori terendah pada karbon aktif dengan perbandingan 0,5 : 1, sebesar 9,56 Å.
Uji Aktivitas (Pt,Pd)-Ce/Zeolit Alam Sebagai Katalis Konventer Dalam Gas Buang Motor Berbahan Bakar Bensin Ady Mara
Jurnal Penelitian Sains No 8 (2000)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.782 KB) | DOI: 10.56064/jps.v0i8.330

Abstract

Telah dilakukan uji aktivitas katalitik (Pt,Pd)-Ce/Zeolit alam dengan kandungan 1% Pt, 1% Pd dan 5% Ce untuk oksidasi hidrokarbon ringan (HK) dan karbon monoksida (CO).Katalis dibuat dengan cara mengimpregnasikan larutan garam klorida dari logam aktif platinum dan palladium, serta garam sulfat dari cerium ke dalam pengemban zeolit alam. Uji aktivitas katalitik oksidasi karbon monoksida dan hidrokarbon ringan dilakukan terhadap gas buang mobil datsun pada beban 20 kg dan dengan variasi perputaran mesin permenit (RPM). Analisis hasil secara kuantitatif dilakukan dengan CO dan HC analyzer IR non dispersif.Hasil penelitian menunjukkan bahwa semakin meningkatnya RPM, oksidasi CO semakin menurun, sedangkan HK semakin meningkat. 
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.
PENGARUH VARIASI TEMPERATUR HIDROCRACKING TERHADAP INDEKS BIAS PRODUK HIDROCRACKING MINYAK JARAK PAGAR DENGAN KATALIS Mo-ZAA Yulian Syahputri; Ady Mara
EKOLOGIA Vol 16, No 2 (2016): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.862 KB) | DOI: 10.33751/ekol.v16i2.746

Abstract

This research aim to determine the influence of hydrocracking temperature variation to refraction index of hydrocracking castor oil product by using Mo-active natural zeolite catalyst. Hydrocracking process of castor oil was conducted with variation of temperature 250oC, 300oC, 350oC, 400oC, 450oC, 500oC and 550oC, whereas the flow rate of hydrogen gases 3.5 mL/min and the weight of catalyst 1.5 g. The refraction index of hydrocracking product of castor oil was analysed by using refractometer instrument. The result of this research showed that the best value of refraction index was 1.4681 which operated at 300oC temperature of hydrocracking.Key words : hydrocracking, catalyst, castor oil, refraction index
Comparison of Acidity Test Method of Nickel Phosphate Silica Catalyst for Production Levulinic Acid from Glucose Qodria Utami Putri; Hasanudin Hasanudin; Ady Mara
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 7, No 3 (2022): October 2022
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v7.i3.106

Abstract

The reaction of levulinic acid production from glucose has a reaction stage that requires a high temperature and high activation energy so that in this levulinic acid production reaction a catalyst is needed. The required catalyst must have a lewis acid site and a bronsted acid site so that the acidity of the catalyst is very influential for the successful production of levulonic acid. Silica nickel phosphate catalysts have lewis acid sites from Ni metal and bronsted acid sites from phosphoric and silica groups. The acidity of the catalyst was measured using the pyridine and ammonia adsorption method and the acidity center strength method using the TGA-DTA base adsorption-desorption. The adsorption of ammonia and pyridine uses the gravimetric method so that it can easily obtain the amount of total acidity of the catalyst and the acidity of the catalyst surface while the TGA-DTA method shows the acid strength of the actual catalyst, which is the real state of the catalyst when catalyzing a reaction and shows the catalyst's resistance to high temperatures. These two methods of measuring acidity have the same disadvantage that they cannot show and know the number of lewis acid sites and bronsted acid sites.
Daur Ulang Limbah Cair CPO Menjadi Sabun Cuci Mara, Ady; Agustin, Yeni
ALKIMIA Vol 1 No 1 (2017): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (157.042 KB) | DOI: 10.19109/alkimia.v1i1.1324

Abstract

Kelapa sawit adalah salah satu tanaman penghasil minyak nabati yang sangat penting. Semakin banyaknya proses pengolahan minyak kelapa sawit menyebabkan jumlah limbah yang dihasilkan akan semakin meningkat juga. Limbah cair dari hasil pengolahan minyak kelapa sawit terdapat kandungan organik cukup tinggi. Melalui penelitian ini dilakukan pemanfaatan limbah (waste re-use) dengan menjadikan limbah CPO sebagai bahan baku dalam pembuatan sabun. Penelitian ini bertujuan untuk mengetahui karakteristik sabun. Parameter analisis mutu sabun meliputi kadar air, alkali bebas, lemak tak tersabunkan, minyak dan bilangan penyabunan. Dilakukan juga pengukuran pH, konduktivitas dan tegangan permukaan menggunakan pHmeter, konduktometer dan metode plat. Hasil penelitian yang diperoleh, sabun memiliki karakteristik: kadar air 21,9779%(b/b), alkali bebas 0,7443%(b/v), lemak tak tersabunkan 3,8438%(b/v), kadar minyak 9,2856%(b/b) dan bilangan penyabunan 89,7549 (mg KOH/g minyak). Konsentrasi optimum sabun adalah 4,5 %(b/v), dengan selisih tegangan permukaan sebesar 0,01092 dyne/cm. PH optimum sabun sebesar 12,62 dan konduktivitas optimum sabun sebesar 18,28-1m-1.
Synthesis of Chitosan−Al2O3 Composite using the Sol-Gel Method and Its Application in Photodegradation of Methylene Blue Desnelli Desnelli; Ipro Hati Padilah; Maria Ulfa; Eliza Eliza; Ady Mara; Fatma Fatma
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 8, No 1 (2023): February 2023
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v8.i1.40

Abstract

The research on synthesis of composites Kitosan-Al2O3 by the sol-gel method for photodegradation of methylene blue has been carried out. Chitosan-Al2O3 varied by mass ratios (1:1), (1:2) and (1:3). The product were characterized using XRD and UV-DRS. Chitosan-Al2O3 ratio (1:1) were characterized by SEM-EDS. The best material will be used to degrade the mehtylene blue by various condition, i.e., effect of pH, contact time and initial concentration of methylene blue. The Chitosan-Al2O3 (1:1) composite was chosen as a material for degrading methylene blue. The result of characterization using XRD showed crystal size the Chitosan- Al2O3 (1:1) composites result were 3,17 nm. UV-DRS characterization, The band gap energy is 1,35 eV. The morphological condition by SEM of Chitosan-Al2O3 ratio (1:1) showed a spherical shape with a small size, and a porous surface the constituent elements C (4.93%), O (33.31%), Na (13.92%), Al (45.59%) dan Zn (2.24%). The degradation process showed the effective condition were pH 10 and contact time of 200 minutes. The optimum concentration of methylene blue at 20 ppm with percent effectivity of concentration reduction methylene blue i.e. 79.35% and the result of TOC analysis i.e. 22,36%. The Chitosan-Al2O3 can be used to degraded the Methylene blue.
PENGARUH VARIASI TEMPERATUR HIDROCRACKING TERHADAP INDEKS BIAS PRODUK HIDROCRACKING MINYAK JARAK PAGAR DENGAN KATALIS Mo-ZAA Yulian Syahputri; Ady Mara
Ekologia: Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Vol 16, No 2 (2016): Ekologia : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/ekol.v16i2.746

Abstract

This research aim to determine the influence of hydrocracking temperature variation to refraction index of hydrocracking castor oil product by using Mo-active natural zeolite catalyst. Hydrocracking process of castor oil was conducted with variation of temperature 250oC, 300oC, 350oC, 400oC, 450oC, 500oC and 550oC, whereas the flow rate of hydrogen gases 3.5 mL/min and the weight of catalyst 1.5 g. The refraction index of hydrocracking product of castor oil was analysed by using refractometer instrument. The result of this research showed that the best value of refraction index was 1.4681 which operated at 300oC temperature of hydrocracking. Key words : hydrocracking, catalyst, castor oil, refraction index
Co-Authors Afreni Hamidah Alfarado, Daniel Amelia Wibowo Asri, Wan Ryan Bambang Yudono Budi Untari Budiyansah, Amsal Desnelli Desnelli Elisa Nurnawati Eliza Eliza Eliza Eliza Esti Efrita F. Oesman F. Oesman Fahma Riyanti Faris Alfarizi Fatma Fatma Fatma Ferlinahayati Ferlinahayati Hasanudin Hasanudin Hasanudin*, Hasanudin Hasanudin, Hasanudin Heni Yohandini Indriana Kartini Ipro Hati Padilah Karna Wijaya Manurung, Yolanda Fany Claudia Mardiyanto Mardiyanto Maria Ulfa MUHAMMAD SAID Qodria Utami Putri Rizkiani, Delisa Rodiansono Suheyanto Suheryanto Suryo Purwono Triyono Wan Ryan Asri Wega Trisunaryanti Widia Purwaningrum Yeni Agustin Yulian Syahputri