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All Journal Walisongo Journal of Chemistry
Febiyanto, Febiyanto
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Chemistry

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THE STUDY OF PINEAPPLE PEEL (ANANAS COMOSUS L.) WASTE BASED-ELECTROLYTE MEDIUM: A SIMPLE EXPERIMENT DESIGN FOR THE STUDENTS Firdaus, Irvan Maulana; Silvia, Rosiana Dewi; Amin, Ahmad Faqih; Tsaqifa, Rajwa Vourza; Purnama, Ira; Febiyanto, Febiyanto
Walisongo Journal of Chemistry Vol 2, No 2 (2019): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (762.502 KB) | DOI: 10.21580/wjc.v2i2.6029

Abstract

To promote the student curiosity and understanding in the electrolyte medium was carried out using home-made Volta cell. The electrode materials were iron and carbon for anode (-) and cathode (+), respectively. The experiment was designed by two models that were single-chamber (SC) and three series-packed chambers (3-SCs), respectively. Electrolyte properties could be investigated in pineapple peel (Ananas comosus L.)-based electrolyte medium during the operating time of 8 hours, respectively. The measured-voltage of 2.63 and 2.60 of the 3-SCs system could turn on the LED lamp. However, in this study, the decrease of voltage and current were due to the oxidation process of the pineapple peel-based medium under air, room temperature, and normal pressure during the long-operating time of the experiment. Finally, this research expected to provide additional valuable experience and knowledge as same as to facilitate in information delivering to the students in understanding the electrolyte medium from the waste or natural sources.
EFFECTS OF TEMPERATURE AND AERATION ON THE DISSOLVED OXYGEN (DO) VALUES IN FRESHWATER USING SIMPLE WATER BATH REACTOR: A BRIEF REPORT Febiyanto, Febiyanto
Walisongo Journal of Chemistry Vol 3, No 1 (2020): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (580.692 KB) | DOI: 10.21580/wjc.v3i1.6108

Abstract

This work investigated the effect of temperature and aeration treatments on the dissolved oxygen (DO) values in freshwater. The study was carried out using a simple water bath reactor in room temperature condition. Based on the results, freshwater sample without the aeration and temperature treatments (control) indicates a fluctuating profile on which the obtained values of DO were 4.21-4.98 mg/L at Taverage = 27.7 °C. However, the aeration treatment was slightly able to enhance the DO value up to 8.12 mg/L from the initial concentration of 3.88 mg/L at Taverage = 27.4 °C. Compared to the aeration treatment, the addition of temperature treatment has extremely increased the DO value up to 21 mg/L from 6.6 mg/L (T0 minutes = 27 °C)  for 20 minutes of DO observation (T20 minutes = 12.4 °C). Hence, this brief report suggests that the addition of temperature treatment gave a significant effect on the DO value in freshwater than the aeration treatment and control.
Co-Authors Amin, Ahmad Faqih Firdaus, Irvan Maulana Ira Purnama Silvia, Rosiana Dewi Tsaqifa, Rajwa Vourza