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All Journal Jurnal Pendidikan Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Media Eksakta Jurnal Akademika Kimia Jurnal Kreatif Online

Tri Santoso

Pendidikan Kimi-PMIPA FKIP Universitas Tadulako

Author-ID : 3154159

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

Published : 9 Documents Claim Missing Document

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PURIFIKASI MINYAK GORENG BEKAS DENGAN PROSES ADSORBSI MENGGUNAKAN ARANG KULIT KACANG TANAH (ARACHIS HYPOGAEA L.) Mardiana Mardiana; Tri Santoso
Media Eksakta Vol 16 No 1 (2020)
Publisher : Universitas Tadulako

Absorbents have been widely used in purification of used cooking oil to improve the oil quality. This study aimed to determine the quality of used cooking oil after adsorbed using activated charcoal from peanut shells based on the best purification time in accordance with SNI 01-3741-1995. Oil quality parameters used are color, free fatty acid content, peroxide number, iodine number, water content, and oil density. The best results were obtained at 120 minutes purification time with an absorbance value of 0.023 A, free fatty acid content of 0.22%, peroxide number of 1.83 meq/kg, iodine number of 43.40, moisture content of 0.19% and oil density of 0.924 g/mL Only iodine number and oil density from the six parametersthat have not yet met the SNI cooking oil quality requirements.

PEMANFAATAN PEKTIN KULIT NANGKA (ARTOCARPUS HETEROPHYLLUS) SEBAGAI ADSORBEN LOGAM CU (II) Khusnul Khotima; Tri Santoso
Media Eksakta Vol 16 No 2 (2020)
Publisher : Universitas Tadulako

One method to reduce levels of heavy metals from the waters is adsorption method by utilizing organic waste such as jackfruit peels. This research aims to utilize jackfruit peels pectin (Artocarpus Heterophyllus) as Cu (II) metal adsorbent the first to extract with 5% citric acid solvent for 120 minutes and characterize pectin from jackfruit peels as well measure the optimum contact time required pectin to adsorb Cu (II) metal with variations in time for 1, 2, 3 hours. The results showed the characterization pectin from jackfruit peels obtained was a yield of 9.9%, ash content 4.04%, moisture content 8%, equivalent weight 641.026 mg, methoxyl content 6.82%, galacturonic acid 45.76%, and the optimum contact time required pectin to adsorb Cu (II) metal, which is 2 hours with the precentage of absorption is 82,80%.

Analisis Hubungan Kemandirian Belajar Dan Sikap Kreatif Siswa Terhadap Hasil Belajar Dalam Pembelajaran Kimia Kelas X Di SMA Negeri 6 Palu Alifta Alifta; Tri Santoso; Dewi Satria Ahmar; Magfirah Magfirah
Media Eksakta Vol 18 No 1 (2022)
Publisher : Universitas Tadulako

This study aims to describe the description of learning independence, students' creative attitudes, and the relationship between learning independence and students' creative attitudes towards learning outcomes in class X chemistry learning at SMA Negeri 6 Palu. This research was conducted from April to June 2021. The research method used was descriptive research. The sampling technique is purposive sampling. The population in this study were all students of class X with a total of 90 students, the samples used were students of class X IPA 2 SMA Negeri 6 Palu in the academic year 2020/2021 as many as 30 students. The research instrument used in this study was a learning independence questionnaire and a creative attitude questionnaire compiled using a Likert scale, and using MID learning outcomes in semester 2 of chemistry class X IPA 2. Based on the results of the study, there were 3 categories of descriptions of independent learning and creative attitudes students are high, medium and low. The results of the calculation of the correlation coefficient between learning independence and student learning outcomes are low (rcount) 0.260. The relationship between creative attitudes towards student learning outcomes is moderate (rcount) 0.457 at the moderate level. Based on these data, it can be concluded that the creative attitude of students to support learning success is more positive than student learning independence. The results of this study are expected to be a source of information regarding the relationship between learning independence and students' creative attitudes towards learning outcomes

Analisis Kemampuan Berpikir Kritis Siswa Kelas XI pada Materi Larutan Elektrolit dan Non Elektrolit Sely Artasasta Lawongo; Tri Santoso; Magfirah Magfirah; Afadil Afadil; Dewi Satria Ahmar
Media Eksakta Vol 18 No 2 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/me.v18i2.2370

This study aims to analyze the critical thinking skills of students of class XI MIPA SMA Negeri 5 Palu on the material of Electrolyte and Non-Electrolyte Solutions. This research is a descriptive research. The sample of this study was 60 students of class XI MIPA SMA Negeri 5 Palu. The data collected was in the form of critical thinking ability test results obtained by giving questions in essay form as many as 7 valid questions. Furthermore, the data collected was analyzed based on indicators of critical thinking skills which include interpretation, analysis, inference, and evaluation respectively 45.50%, 27.08%, 27.08%, and 23.54%. The average result for all indicators of critical thinking ability of students in class XI MIPA is 32.53%. This shows that the critical thinking skills of class XI students of SMA Negeri 5 Palu are still lacking.

Analisis Logam Merkuri (Hg) pada Air Sungai Janja di Derah Pertambangan Mita Rosita; Tri Santoso; Sitti Aminah; Sri Hastuti Virgianti Pulukadang
Media Eksakta Vol 18 No 2 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/me.v18i2.2374

Mercury metal (Hg) is included in the heavy metal group which is toxic because it has neurotoxin properties for living things. As a heavy metal, mercury (Hg) will be difficult to decompose if it enters the waters, mercury (Hg) will also form deposits in sediments. Mercury is found in nature and is found in soil, water and air. Mercury is rarely found in its free form in nature but is in the form of cinnabar (HgS) seeds. Mercury metal is usually easy to find in mining areas, such as in gold mining areas. Gold mining is one of the activities that can increase people's income, but gold mining can be detrimental if in its implementation it is not followed by a good gold processing waste treatment process. The method used in this research is cold vapor atomic absorption spectrophotometry. The results obtained in this study are the metal content of miner 1 as many as 3 samples. Sample 1 has a concentration of 1.2594 ppm; sample 2 has a concentration of 0.4924 ppm; and sample 3 has a concentration of 0.2091 ppm. Miner 2 as many as 3 samples of which sample 1 has a concentration of 1.0260 ppm; sample 2 has a concentration of 0.3401 ppm; and sample 3 has a concentration of 0.3152 ppm. And miner 3 has 3 samples where sample 1 has a concentration of 0.7215 ppm; sample 2 has a concentration of 0.2464 ppm; and sample 3 has a concentration of 0.3461 ppm. The results obtained from the calculation of metal concentrations of mercury (Hg) show that the water of the Janja river has been contaminated with heavy metals, namely mercury (Hg). This is due to mining in the Janja river.

Co-Authors Aceng Haetami Afadil Alifta Alifta Dahlan Dariati Dariati Dewi Satria Ahmar Esterlina Marpaung, Meida Khusnul Khotima Leny Yuanita M. Alim Marhadi Magfirah Magfirah Mardiana Mardiana Maysara Mita Rosita Nina Zulvita Riska T. Windiastuti Sely Artasasta Lawongo Sitti Aminah Sri Hastuti Virgianti Pulukadang

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