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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 1 (2021): ALKIMIA" : 7 Documents clear

Antioxidant Activity and Bioactive Compounds of Ethyl Acetate Fractions from Syzygium cumini Wood Stem Alawiyah, Aika Latifah; Senania, Astri
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Syzygium cumini is one of the endemic plants in Indonesia that has the potential to be developed. The fruit was known to have potential as a diabetes drug. However, very few studies to determine the medicinal potential and identification of compounds of Syzygium cumini wood stem has never been studied before. Therefore, this study aimed to determine the antioxidant activity and content of compounds in Syzygium cumini wood stem ethyl acetate fraction. The crude ethanol extract was prepared from the wood stem powder of Syzygium cumini in ethanol using maceration. Furthermore, it was carried out by the liquid-liquid fractionation process using solvents of different polarity. Antioxidant activity of the crude extract, hexane fraction, and ethyl acetate fraction was determined by spectrophotometric methods using 1,1-diphenyl-2-picrylhydrazyl (DPPH). Analysis of bioactive compounds by using Thin Layer Chromatography (TLC). Identification of compounds functional groups was carried out to support the results of TLC analysis by using Fourier-transform infrared (FTIR). Ethyl acetate fraction showed the highest antioxidant activity (IC50 13,62 µg/mL), followed by ethanol extract (IC50 19,64 µg/mL) and hexane fraction (IC50 61,25 µg/mL). The antioxidant activity of the acetate fraction was lower than that of ascorbic acid with an IC50 value of 2,85 µg/mL. However, this fraction has very strong antioxidant activity. The TLC analysis results showed that the sample was thought to contain an alkaloid, phenolic, flavonoid, and terpenoid. The assumption on agreement with FTIR analysis which showed functional groups were C-H, O-H, N-H, C=O, and C=C aromatics as constituents of these compounds.

Dye Sensitized Solar Cell Menggunakan Ekstrak dari Bunga Pukul Empat (Mirabilis jalapa) Merah dan Kuning Hamdani, Mochammad Luthfi
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Four o’clock flowers contain betalain compound namely betacyanin and betaxanthin. This compound is used as sensitizer on dssc. This study used water as a solvents with pH variations of 2, 4, and 6 for the extraction of betalain compounds from four o'clock flowers. Molecular characterization of compounds using Uv-Vis spectrophotometer to determine the wavelength and FTIR to determine the functional groups. The HOMO and LUMO analysis using a Cyclic Voltametery. This study generated absorbance to red and yellow four o'clock flowers extract is 532.50 nm which is betacyanin and 473.30 nm which is betaxanthin. FTIR analysis both of dyes produce wave number 3750-3000 cm-1 showed the presence of hydroxyl (O-H) and 1675-1500 cm-1, which showed the presence of alkenes. The HOMO and LUMO analysis using cyclic voltammetry of betacyanin extract at pH 2 were -3,497 eV and -6,012 eV and betaxanthin were -3,623 eV and -5,803 eV. DSSC performance using betacyanin and betaxanthin dye showed an efficiency value of 0.208% and 0.0036%. Results showed that the extract betacyanin and betaxanthin of red and yellow four o'clock flowers have shown a good sensitizer agents in DSSC. Keywords: Betacyanin, Betaxanthin, DSSC, Efficiency

Reduction of Fe Levels in Groundwater Using Aeration-Filtration Method with Tray Aerator System Sari, Yelfira
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

The presence of high iron (Fe) content in water consumption is a major factor that causes health and aesthetic problems. Its amount in water samples can be reduced by combining the aeration and filtration methods of water treatment. The aeration method basically involves making direct contact between air and water, which is usually done by adding both together. Subsequently, the filtration method uses porous media like sand, gravel, and activated charcoal to filter water.This research compares the effectiveness of aeration, filtration, and combined aeration-filtration methods of water treatment. For the aeration method, a form of trays aerator arranged in 6 levels with a distance of 20cm is used along with a varied contact time duration of 1, 3, and 5 hours. In addition, quartz sand, activated carbon, palm fiber, and coral were used as the media for the filtration method. The results obtained as the % value of iron (Fe) removal were varied at a contact time of 1, 3, and 5 hours for both the aeration and combined aeration-filtration method, and 46.95; 78.2; 82.48; 72.32; 81.71; 87.24; and 70.44 for the filtration method shows the working effectiveness of the tools. The combination of aeration with filtration provides maximum results when compared to using aeration alone or filtration methods alone.

Absorption Methanyl Yellow Dye Using Hydrogel of Cassava Peel Starch (Manihot esculenta Cranzt) Firnanelty, Firnanelty
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Hydrogel of cassava peel starch was successfully decreased methanyl yellow dye. This adsorbent was employed to adsorb typical organic cationic dye contaminants from high concentration effluents. This study aimed to determine characteristic of cassava peel starch hydrogel and ability of hydrogel increased dyes. The stages of hydrogel consist of extracting cassava peel starch, making a starch solution, making hydrogel, testing water absorption, and analysing with FTIR and UV-Vis spectrophotometer. The results have obtained that the cassava peel starch hydrogel had have N-H group. Result of hydrogel had been contacted with dyes that showed N=N and S=O groups from the initial functional groups of cassava peel starch in FTIR spectum. The highest absorption of hydrogel was at 30 ppm methanyl yellow dye concentration, which was 31.72%. This result showed that the hydrogel of cassava peel starch can be used as an absorbent of methanyl yellow dye.

Sulfonated Nano-bentonit as Doping Material in Chtiosan/PVA membrane in Fuel cell Application Ariesta, Nina
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Electrolyte membrane of fuel cell is the main component that plays a role in separating the reactants and being a means of transporting hydrogen ions produced by the anode reaction to the cathode so that the reaction at the cathode produces electrical energy. Chitosan/PVA/Nanobentonite based membrane was made of natural bentonite form Karang Tengah, Bogor. The study was conducted to know the effect of particle size of doping materials added to chitosan/PVA membrane for fuel cell. The method used in the experiment was casting method with variation of concentration of sulfonated bentonite. Then, membranes were namely C/PVA/n-ben 0.3, 0.6 and 0.9. The membrane that had been synthesized was identified by swelling test, proton conductivity test and cation exchange capacity test then characterized by FTIR, SEM and XRD. The result of the experiment showed the best swelling test was presented on the membrane with concentration of 0.9% sulfonated bentonite by 62.79% and the best proton conductivity test was shown on a membrane with a concentration of 0.6% sulfonated bentonite which was 2.24 x 10-6 S/cm, supported by the result of the cation exchange capacity data.

DETERMINATION OF OIL AND FAT LEVELS IN LIQUID WASTE OF PALM OIL INDUSTRY IN MUARO JAMBI DISTRICT Rahmi, Rahmi
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Waste contains pollutants that can change the quality of the environment.Wastewater discharged into the environment must comply with standard quality standards. One of the parameters that are harmful to the environment are oils and fats. Oils and fats are on the surface of the water so they can block sunlight from entering the water and can interfere with the activities of aquatic biota. Determination of oil and fat content in palm oil industrial wastewater in Muaro Jambi District using the gravimetric method based on the Indonesian National Standard 6989.10:2011. The results obtained in the inlet waste pond of PT. A, PT. B and PT. C respectively 582.4 mg/L; 380.2 mg/L and 221.4 mg/L while for PT. A, PT. B and PT. C respectively 78.8 mg/L; 53.6 mg/L and 12.8 mg/L. According to the Regulation of the Minister of the Environment of the Republic of Indonesia No. 5 of 2014, the maximum permissible level for liquid waste oil and fat at the outlet liquid waste of the palm oil mill industry is 25 mg/L. Based on the test results, it can be concluded that the levels of oil and fat that meet the quality standards of palm oil liquid waste are outlet waste from PT. C.

Determination of Heavy Metals and Other Toxic Elements In Four Brands of Commercial Bottled Water From Indonesia Market By ICP/MS Alam, Tunas
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Heavy metals and toxic elements four brands of commercial bottled water from Indonesia market were analyzed by using Inductive Couple Plasma-Mass Spectrometer (ICP-MS). The heavy metals and toxic elements to be analyzed were copper (Cu), iron (Fe), lead (Pb), cadmium (Cd), chromium (Cr), arsenic (As), selenium (Se) and manganese (Mn). The results are the heavy metals and toxic elements from all commercial water samples were below the permissible level of the World Health Organization (WHO) and Standar Nasional Indonesia (SNI). Hence, this determination clarify no risk about quality and safety of commercial bottled water for public drinking water.

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Contact Name
SITI RODIAH

Contact Email
siti.rodiah_uin@radenfatah.ac.id

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

Editorial Address
-

Location
Kota palembang,

Sumatera selatan

INDONESIA