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INDONESIA
Jurnal Akademika Kimia
Published by Universitas Tadulako
ISSN : 24775185     EISSN : 23026030     DOI : -
Core Subject : Science, Education,
Chemistry Education
Jurnal Akademika Kimia merupakan jurnal elektronik open access yang bertujuan untuk mempublikasi hasil-hasil penelitian terbaru dalam area pendidikan akademik khususnya pada bidang pendidikan kimia meliputi asesment pembelajaran, model pembelajaran dan pengembangan perangkat pembelajaran, serta kimia murni termasuk kimia organik, kimia anorganik, kimia analitik, kimia fisik, biokimia dan bidang kimia lainnya seperti kimia lingkungan.
Arjuna Subject : -
Articles 240 Documents
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KANDUNGAN MERKURI (Hg) DALAM AIR LAUT, SEDIMEN, DAN JARINGAN IKAN BELANAK (Liza melinoptera) DI PERAIRAN TELUK PALU Yusuf, Moh.; Hamzah, Baharuddin; Rahman, Nurdin
Jurnal Akademika Kimia Vol 2, No 3 (2013)
Publisher : Universitas Tadulako

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Abstract

Mercury (Hg) is one type of a dangerous heavy metals. As one of contaminants, mercury enter the aquatic ecosystem through atmospheric decomposition or sourced from the industrial waste externalisation and bilogical and chemical converted in methyl mercury. This research aims to find out and determine the mercury concentrate which contained in sea water, sediment and belanak (Liza melinoptera) network in Palu bay water. The analysis of mercuri content on the tested sample using Automatic Mercury Analyzer. The working principle of the device is gold amalgamation method by heating and separation. The research result showed that the mercury content in belanak network is 0.143 - 0.188 ppm, sediment is 2.453 - 2.800 ppm and the sea water is 0.030 – 0.040 ppm. Based on the decision of the state minister of environmental regarding the guidelines for determination of Hg standard quality for sea water is 0.002 ppm and 0.001 ppm for marine biota. It shows that the Palu bay water condition has been polluted and the belanak is not worth to be consumed.
Pengaruh Ekstrak Daun Kemangi (Ocimum sanctum L.) Terhadap Kelarutan Kalsium Batu Ginjal Sumarni, Wiwin; Sabang, Sri Mulyani; Ratman, Ratman
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

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Abstract

The aim of the study is to determine dissolving power and the solubility of calcium on kidney stone by the extracts of basil (Ocimum sanctum L.) and determined the effect of basil leaves extracts concentration (%)on the solubility of kidney stones calcium. The method used the extraction infuse way. Variation of concentration extracts were 5%, 10%, 15%, 20% and 25%. The solubility of calcium in basil leaves extracts was determined by SpectroDirect. The results showed that concentration of 5% dissolved by 15.38% of calcium; concentration of 10% dissolved by 21.05%; concentration of 15% dissolved by 26.92%; concentration of 20% dissolved by 35.71%, and concentration of 25% dissolved by 42.10%calcium. It can be concluded that the extracts of basil leaves dissolved kidney stones calcium. The solubility tests showed that the higher the concentration of the basil leaves extracts than the greater the solubility.
Biocharcoal dari Biji Salak (Salacca edulis) sebagai Adsorben Terhadap Kromium Pongenda, Rudy Christiyanto; Napitupulu, Mery; Walanda, Daud K.
Jurnal Akademika Kimia Vol 4, No 2 (2015)
Publisher : Universitas Tadulako

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Abstract

Salak, snake skin fruit, is one of many kind fruit that is much preferred by people because its taste is sweet, crunchy and because it has a high nutrient content and have good prospects for cultivated. During this time, only flesh fruit of salak are utilized and the seed become waste. Therefore, it has been done a research about biocharcoal of salak seed (salacca edulis) as an absorbent for chromium. The method used in this study was a laboratory experiment using salak seeds biocharcoal as the adsorbent for chromium, concentration of absorbed chromium was measured by using a spectrodirect spectrophotometer. The results showed that the optimum time for adsorption of metal ion chromium obtained was 60 minutes with the absorption efficiency of 99.67%, while the optimum weight for absorption of metal ion chromium obtained was 80 mg with the absorption efficiency of 99.70% and the optimum concentration for absorption of metal ion chromium was 80 ppm with the absorption efficiency of 99.77%.
PERBEDAAN HASIL BELAJAR KIMIA MELALUI PEMBELAJARAN KOOPERATIF TIPE BUZZ GROUP DENGAN TIPE STAD DALAM POKOK BAHASAN IKATAN KIMIA PADA SISWA KELAS X SMAN 4 PASANGKAYU Etty Etty; Suherman Suherman; Supriadi Supriadi
Jurnal Akademika Kimia Vol 2, No 4 (2013)
Publisher : Universitas Tadulako

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Abstract

This research aimed to determine the differences in student outcomes that given cooperative model of Buzz group type with STAD type in students ofclass X SMA Negeri 4 Pasangkayu. Sample used consists of two classes, namely class XB as Buzz class group and class XA as STAD classes were determined by purposive sampling. Data collection was conducted using a test instrument, be in the form of student achievement test chemistry in the form (multiple choice) as many as 30 items. Testing research data using statistical analysis t test (right side) with the prerequisite test, test for normality, and homogeneity. In this research obtained the median of student learning outcomes using learning Buzz groupmodel was 19.56 while median of student learning outcomes with STAD cooperative model is 16.46. Based on statistical hypothesis testing with t test statistic (right) obtained values of thitung > ttabel was 1.771 > 1.67 with the degree of freedom = 0.05 and df = 59. The results showed that there was a difference in student learning outcomes using cooperative learning group Buzz type with student learning outcomes using STAD type cooperative.
Penentuan Konsentrasi Efektif Ekstrak Tanaman Patikan Kebo (Euphorbia Hirta) Merah Dan Hijau Dalam Melarutkan Kalsium Hamdiana, Hamdiana; Jura, Minarni Rama; Ratman, Ratman
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

The use of traditional materials is one alternative for the treatment of kidney stones. One of them is utilizing a plant of patikan kebo (Euphorbia hirta). This study is conducted by using laboratory experiments and the extract of the plant of patikan kebo red and patikan kebo green to dissolve the calcium phosphate as a substitute for kidney stones. The extraction of samples is conducted by decoction. The aim of the study is to determine the effective concentration of the extracts of patikan kebo red and green to dissolve calcium and test the effectiveness of the extracts of patikan kebo to dissolve calcium compared to Batugin elixir and distilled water. Determination of the concentration of dissolved calcium in the extracts using a flame photometer. The results show that the extract of patikan kebo red with a concentration of 2.1% is effective in dissolve the calcium with a concentration of 5.2 ppm. The extract of patikan kebo green with a concentration of 27.4% is effective in dissolving the calcium with a concentration of 27.5 ppm. When compared with Batugin elixir and distilled water, Batugin elixir can only dissolve the calcium with concentration 15.3 ppm, while distilled water can only dissolve 3 ppm of the calcium.
Pembuatan Pupuk Organik Dari Limbah Tandan Kosong Kelapa Sawit Warsito, Joko; Sabang, Sri Mulyani; Mustapa, Kasmudin
Jurnal Akademika Kimia Vol 5, No 1 (2016)
Publisher : Universitas Tadulako

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Abstract

The study’s aim is to utilize waste oil palm empty bunches into organic fertilizer and analyze the levels of nitrogen (N) and phosphorus (P). The methods used may include sampling and laboratory analysis. To determine the levels of nitrogen (N) and phosphorus (P) on the organic fertilizer from TKKS waste, spectrodirect was used. Based on analysis, it was obtained that level of nitrogen (N) is 2.033% and phosphorus (P) was 0.107%, while the amount of moisture content was 47.53% and ash content was 36,66%. Based on the SNI about compost quality from organic waste, the results of this study indicate that waste TKKS can be used as raw material for organic fertilizer.
PENETAPAN KADAR RHODAMIN B DAN NATRIUM BENZOAT PADA SAUS TOMAT YANG BEREDAR DI WILAYAH PASAR INPRES KOTA PALU Wardanita, Wardanita; Jura, Minarni Rama; Tangkas, I Made
Jurnal Akademika Kimia Vol 2, No 4 (2013)
Publisher : Universitas Tadulako

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Abstract

This research was conducted to determine the level of a dye, rhodamin B, and a preservative, benzoic acid, on tomato sauce distributed in the area of Palu city. The food additive is used in order to get more interesting color and the benzoic acid is used to keep the food fresh for a long period of time. The research method used was a thin layer chromatography. It was aimed at knowing weather there was a dye called rhodamin B in the research sample or not. From the analysis result, it can be said that the sample did not contain the dye rhodamin B. in addition, another research method used was alkali acid titration which was used to examine the sample quantitatively and qualitatively. From the qualitative examination, it was found that all tomato sauced sampled positively contained the preservative benzoic acid. The tomato sauce produced by Mojokerto-Indonesia contained 34.7mg/kg while the one produced by Urabaya-Indonesia contained 40mg/kg. In conclusion, (1) all sample of tomato sauce examined did not contain Rhodamin B,the red dye substance, which was forbidden to be used for food, cosmetics, and medicine according to the Health Ministerial Regulation of Indonesian Republic No. 722/Menkes/Per/IX/1988 concerning food composition; and (2) the content level of Benzoic Acid in tomato sauce spread out in the traditional market, Inpres, Palu city has fulfilled the standard, i.e. + 1000 mg/kg. However, it is expected that all people must still be careful when buying and using tomato sauce.
Pembuatan Etanol dari Buah Salak (Salacca zalacca) Melalui Proses Fermentasi Wartini, Ni Ketut; Abram, Paulus Hengky; Rahman, Nurdin
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

The study aimed to determine the level of ethanol that produced by the flesh of salak fruits with the fermentation process. The method used was an experimental method. The technical is fermentation, with tape yeast starter, determination of ethanol and purification. Ethanol level in the flesh of fresh fruits without handling was 11.3%, the highest levels of ethanol in the fruit flesh of 4 days after the plucking was 7.6%, and the fruit flesh of 7 days after the plucking was 3.4%. 
Pengaruh Silika Terhadap Membran Blend Kitosan-Polivinil Alkohol-Litium Sebagai Membran Elektrolit Baterai Ion Litium Riska Novitasari; Siang Tandi Gonggo; Suherman Suherman
Jurnal Akademika Kimia Vol 5, No 1 (2016)
Publisher : Universitas Tadulako

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Abstract

Battery is one  of a source of energy. Increasing the need of energy affects to the diminishing reserves of fossil energy sources. Therefore, this needs for energy sources alternative. Modification of chitosan-polyvinyl alcohol electrolyte membrane added with lithium salt has an advantage on environmentally friendly. This research aims to study the effect of adding percent weight of silica on the conductivity of the electrolyte polymers made from chitosan-polyvinyl alcohol-lithium. The ionic conductivity of the electrolyte polymer chitosan-polyvinyl alcohol-lithium-silica was measured by impedance spectroscopy. The results showed the electrolyte polymer with the addition of 5% silica performed the highest ionic conductivity by 2.005 x 10-7 S/cm. Characteristic of battery made from electrolyte polymer chitosan-polyvinyl alcohol-lithium with the addition of silica performed voltage of 1.5 Volts which was comparable to the commercial battery with the voltage of 1.8 Volts. These results indicate that silica can be used as a filler to improve the ionic conductivity.
Karakterisasi FTIR Poliblend Adsorben Serbuk Biji Buah Kelor (Moringa Oleifera) Dan Cangkang Ayam Ras Untuk Pengolahan Air Gambut Di Daerah Palu Barat M. Yusi Prilina Bertus; Suherman Suherman; Sri Mulyani Sabang
Jurnal Akademika Kimia Vol 3, No 1 (2014)
Publisher : Universitas Tadulako

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Abstract

The seed of moringa (Moringa oleifera) is used as natural water purification materials and are coagulant. Biocoagulant materials combined in this study were egg shells. Egg shell is known to contain high calcium. This study aims to determine the character of polyblends in physical – chemical test, the degree of swelling an polyblends functional groups, and to determine the optimum ability of the polyblends power absorption. The research method used was sampel preparation, polyblends characterization, swelling degree and to analyze FTIR functional group and water quality test with parameters. The research results showed that the physical character polyblends lasting effectiveness was polyblends SBK : SCT with a ratio of 5:5, while the chemistry test of polyblends character with FTIR analysis showed the functional groups OH, C=C, CH, CH2, CO which each have their own unique characteristics. The water quality with parameters of turbidity, good polyblends adsorption was polyblends SBK:SCT with ratio of 7.5:2.5 with a decreased of 91.43%, ferrous metal content, polyblends SBK:SCT with a ratio of 7.5:2.5 declined 90.90%. The value test of BOD and COD, the best polyblend adsorption was polyblends 5:5 with 93.26% dcreased. Polyblends that produced the best pH of water quality was polyblend with a ratio of 7.5:2.5 with the pH value of 4.68 turned to 7.82.

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