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ALKIMIA : Jurnal Ilmu Kimia dan Terapan

alkimia
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Published by Universitas Islam Negeri Raden Fatah Palembang

ISSN : 25809873 EISSN : 25809881 DOI : -

Core Subject : Science, Social, Engineering,

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Social Sciences

ALKIMIA : Journals of chemistry and applied science with number of E-ISSN: 2580-9881 and P-ISSN: 2580-9873 is a journal of chemistry that publishes research results related to the findings in the field of organic chemistry, inorganic, physical, analytical, biochemical and other as a problem solving in the field of environment, energy, and food. ALKIMIA is published twice a year in February and August, by chemistry science and technology faculty of UIN Raden Fatah Palembang. The editors are happy to invite researchers to publish their research results at Journal ALKIMIA.

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Articles 7 Documents

Search results for , issue "Vol 5 No 2 (2021): ALKIMIA" : 7 Documents clear

Pengaruh Penambahan Silika Abu Kelapa Sawit pada Batako Agropolimer Prendika, Wimpy; Syafei, Dedri; Nasirly, Riri
ALKIMIA Vol 5 No 2 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

This research was conducted to provide more value to oil palm ash and decrease the use of cement in agropolymer brick making. Oil palm industrial biomass waste contains silica (SiO2) which can replace the silica content in cement. This study aims to determine the chemical composition of oil palm biomass ash, physical and mechanical properties and surface morphology of agropolymer bricks. Agropolymer brick made from cement: sand (1:4) with variations palm ash 0; 4,3; 8.6; 12.9; 17.2; and 21.5% which has been purified with 3% HCl and a total weight of 7500 g. Agropolymer brick making is done by utilizing palm ash to reduce cement use. XRF test results showed that the greatest composition of ash before and after acidification was SiO2 namely 50.475% to 56.255%. The results of the water absorption test showed that the water absorption capacity of the concrete blocks increased with the addition of silica from the ash from palm biomass. The results of the average density test of concrete blocks with the addition of palm biomass silica were lower than the density of sand, namely 2.241 g/cm3. The compressive strength test results show that formula 3 has the optimum compressive strength is 28.8235294 kg/cm2. These results are supported by the SEM analysis of formula 3 showing that the agglomeration and grain size are not homogeneous and the surface morphology is denser. The brick produced is in accordance with SNI SNI 03-0348-1989 category IV the quality of solid concrete bricks B70.

Liquid Fuel From Polypropylene Plastic Wastes with Bentonite as Catalyst by Catalytic Cracking Process Kurnia, Dwi Miftha; Faizal, Muhammad
ALKIMIA Vol 5 No 2 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Abstract. The aim of this project work is to convert waste plastics into useful fuel range hydrocarbon mixture. The catalytic cracking process of polypropylene plastic waste (mineral water cup) was performed in a fixed-bed reactor with bentonite catalyst, at five temperatures ranging from 150 to 350oC with percent catalyst of 4%.The amounts of liquid fuel produced, as well as the compositions of the resulting liquid fuel, were determined by Gas Chromatography-Mass Spectrometry. The influences of cracking parameters, such as temperature and catalyst mass, on product yields were investigated. The optimum conditions cracking of polypropylene plastics waste with bentonite as catalyst is at temperature of 350oC with 4% catalyst mass or20 grams. The highest liquid yield (41.5%) was obtained using 20 gram Bentonite catalyst at 350oC. The highest percent composition of C6H14, C7H16 andC8H18 in liquid product is 16.92%, 18.48%, and 12.22% respectively at temperature of 350oC.

The Future Energy Production from Aluminum and Water With Carbon Catalyst From Rice Husk Safii, Farhan Fikri
ALKIMIA Vol 5 No 2 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Hydrogen is an environmentally friendly fuel that is promoted as one of the most promising alternative energies to replace fossil fuels. The production of hydrogen through the hydrolysis reaction of aluminum is a solution to overcome the problems in the current hydrogen production method. The production of hydrogen through the hydrolysis of aluminum is an environmentally friendly process because this process produces hydrogen and AlOOH or Al(OH)3 which are easily biodegradable in nature. However, this reaction has a low reaction rate so a catalyst is needed to increase the reaction rate. In this study, carbon catalyst from coconut shell waste which was carbonated at a temperature of 800 °C and activated with 1M sulfuric acid had been successfully synthesized by electrolysis method with 0.01 NaOH solution; 0.1; 1 M. The morphological structure of the carbon catalyst produced has the same shape as activated carbon from coconut shells, which is amorphous. The SEM-EDX results showed that the carbon catalyst electrolyzed with 0.01 M NaOH had the highest metal content of Na, which was 3.68 wt%. Meanwhile, 0.1 and 1 M have Na metal content of 2.17% and Na 2.54 wt%. The results of Thermal Gravimetric Analysis (TGA) show that the thermal stability of the carbon catalyst is higher than that of activated carbon. Surface area analysis by Brunauer-Emmett-Teller (BET) showed that the activated carbon and the synthesized carbon catalyst had microporous and mesoporous structures simultaneously. The electrolyzed carbon catalyst with 0.1 M NaOH has the largest surface area of 512,2 m2/g. While the electrolyzed carbon catalyst with 0.01 M has the smallest surface area of 393,189 m2/g. The effectiveness of the carbon catalyst is known from the amount of aluminum oxidized. The carbon catalyst electrolyzed with 0.01 M NaOH was found to be the most effective because it was able to oxidize 9.17% aluminum, while the carbon catalyst electrolyzed with 0.1 and 1 M NaOH was only able to oxidize 6.85 and 7.96 aluminum, respectively. %.

Phytochemical Screening of Active Secondary Metabolites and Antibacterial Activity Kaffir Lime Leaf (Citrus hystrix) and Tumeric Leaf (Curcuma longa Linn.) Against Escherichia coli Suryani, Novia; Munawar, Faradillah; Hajaroh, Siti
ALKIMIA Vol 5 No 2 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

This study aims to determine the content of active compounds of secondary metabolites and antibacterial activity of secondary metabolites from a maceration of turmeric leaf (Curcuma longa Linn.) and kaffir lime leaf (Citrus hystrix) against Escherichia coli (E. coli). Each sample of kaffir lime leaf and turmeric leaf was extracted by maceration method using 96% ethanol solvent for 3 x 24 hours and the solvent was changed every 1 x 24 hours, then the filtered filtrate was thickened using a rotary evaporator. The phytochemical screening test was carried out by qualitative method using chemical reagents. The antibacterial activity test of the extract of the combination of turmeric leaves (Curcuma longa Linn.) and kaffir lime leaves (Citrus hystrix) used the Punch Hole Diffusion method with various concentrations of 20%, 40%, 60%, 80%, and 100%. The results showed that the combined extract of turmeric leaf (Curcuma longa Linn.) and kaffir lime leaf (Citrus hystrix) contained secondary metabolites in the form of flavonoids, alkaloids, steroids, tannins, and saponins. The optimum zone of inhibition to inhibit the growth of E. coli produced was 9.73 ± 0.78 mm. Overall, it can be concluded that the combined extract of turmeric leaf (Curcuma longa Linn.) and kaffir lime leaf (Citrus hystrix) has potential as an alternative to antibacterial active compounds.

Determination of Mefenamic Acid and Dexametashone in Instant Pegal Linu Herbal Medicine in Kediri by Using UV-Vis Spectro Sukmawati, Datin An Nisa; Sembiring, Yulia Shara
ALKIMIA Vol 5 No 2 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Jamu pegal linu is one of the traditional medicinal products that are in great demand by the public, because it can relieve muscle and bone pain, improve blood circulation, strengthen body resistance, and relieve pain all over the body. However, some industry players have added medicinal medicine such as dexamethashone and mefenamic acid in herbal medicine. This study aims to determine the validity of the method in the analysis of dexamethashone and mefenamic acid by UV-Vis spectrophotometry on herbal medicine circulating in Indonesia several markets in Kediri-East Java. The sampling technique used in this study is a purposive sampling method so as to get 5 samples of herbal medicine (A,B,C,D,E). Research begins with determined of wavelength (nm) maximum of dexamethashone and mefenamic acid standard at 200-400 nm and determined of method validation to ensure the accuracy of the method in determining dexamethashone and mefenamic acid levels in the sample. The results of the research showed that the wavelength maximum of mefenamic acid and dexamethashone standard were 288 nm and 245 nm. The method validation showed that this method is good for detect the presence of mefenamic acid and dexamethasone in herbal medicine with the value of the validation parameters, such as linierity of calibration curve of mefenamic acid and dexamethasone weas 0.998, detection limit (LOD) 0.8779 µg/mL and 0.9677 µg/mL ; quantification limit (LOQ) 2.9264 µg/mL and 2.2256 µg/mL; intraday and interday precision of mefenamic acid was expressed by the value of % standard deviation relative (%RSD) was 0.8905 % and 1.0781 %; intraday and interday precision of dexamethasone was expressed by the value of % standard deviation relative (%RSD) was 0.6917 % and 0.8062 %. Respectively; as well as the accuracy expressed in mean % recovery were 101.547 % for mefenamic acid, and 100.576% for dexamethasone. Results analysis of the sample using a validated method showed that only sample A was mefenamic acid positively with concentration was 7.6796 µg/mL. The other hand, sample C,D and E was dexamethashone positively with concentrations were 2.4978 µg/mL, 2.4112 µg/mL and 8.7748 µg/mL.

Study ff Interaction Between ADT-C2 Cyclic Peptide (Ac-CADTPPC-NH2) and E-Kadherin Protein Using Docking Molecular Method Panduwati, Digna Renny
ALKIMIA Vol 5 No 2 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Research has been conducted on the study of the interaction between cyclic peptide ADTC2(Ac-CADTPPC-NH2) and E-cadherin protein using the molecular docking method. The aim of this study is to determine the position of the binding site and the energy of interaction between the ADTC2 peptide and the EC1-EC2 domain of E-kadherin. This research was divided into two parts, (1) Preliminary test using molecular dynamics (DM) method with Gromacs v4.5.4 software, (2) interaction of the peptide ADTC2 with EC1-EC2 using the molecular docking method (MD) with Autodock 4.2 software. Docking was performed with the blind dock method on EC1 and EC2 position. In the second step, the gridbox position was reduced based on the binding activity between E-cadherin and peptides. The strongest interaction and Van der Walls bonds were obtained in boxes B, C and D. The results showed that the ADTC2 peptide had a biological activity to inhibit the interaction of E-cadherin...E-cadherin by forming a complex with the EC1-EC2 domain. This inhibition occured by forming two binding sites in the EC1 domain (interaction energies are -23.309 kJ / mol and -26.234 kJ / mol, respectively) and one binding site in the EC2 domain (interaction energies are -22.677 kJ / mol). Based on preliminary tests, it can be proven that the native structure of ADTC2 is cyclic with optimization energy of -52504.78 kJ/mol and very stable from the beginning to the end of DM with an RMSD was <2 Å.

Synthesis of Fe3O4 Nanocatalyst Capped Citric Acid (Fe3O4-CA) from Sargassum filipendula Pratiwi, Dian
ALKIMIA Vol 5 No 2 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

The nanocatalyst Fe3O4 capped citric acid (Fe3O4-CA) was successfully synthesized using brown seaweed Sargassum filipendula. Sulfated polysaccharides contained in Sargassum filipendula extract contain sulfate, hydroxy, and aldehyde groups which cause Fe3+ reduction and nanoparticle stabilization. The FT-IR results of Sargassum filipendula extract showed the presence of CO-SO3 stretching vibrations at 1040 cm-1, sulfate groups at 1241 cm-1, aromatic CC at 1413 cm-1, carbonyl at 1604 cm-1, CH stretching vibrations at 2932 cm-1. 1, and the hydroxy group at 3316 cm-1\. Meanwhile, citric acid was used as capping to prevent agglomeration of the synthesized nanocatalyst. Fe3O4-CA nanocatalysts were characterized using XRD, PSA, and SEM-EDX. The XRD results were processed using the Debye-Scherrer equation and the crystal size of Fe3O4-CA was 8.5 nm. PSA results show that Fe3O4-CA particles have a radius of 45.09 nm or diameter of 90.18 nm. This nanocatalyst was also tested for the synthesis of pyrimidine-derived compounds at optimum conditions using 7.5% mol of catalyst, 50 °C for 6 hours, in order to obtain a yield of 83.2%.

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SITI RODIAH

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siti.rodiah_uin@radenfatah.ac.id

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Journal Mail Official
jurnal.alkimia@radenfatah.ac.id

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Location
Kota palembang,

Sumatera selatan

INDONESIA