| 030028 |
Japan |
Dependence of Alloy Composition in Color Change of Brass Foil by Oxide Thin Layer Formation |
Sendai Daisan High School, Miyagi Prefecture |
Yuki Kawakatsu
Masahiro Kimura
Tomoaki Nikaido
Ritu Watanabe
Yugo Yagiuchi |
It is known that copper foil undergoes a color change in heating by oxide thin layer formation. Therefore, we focused on the color change by the oxidation of brass foil. Brass foil (Akaguchi (Cu87%Zn13% alloy) and Aoguchi (Cu85%Zn15% alloy)) also undergoes color change by oxidation, and it shows heating time and temperature dependence. Brass foil need longer heating time to appear color change than copper foil, and we can visually confirm that the brass has corrosion resistant. In addition, color change of brass foil depends on the percentage of copper in the brass, and Aoguchi shows rapidly color change in same heating condition. We show that brass has different physical properties than copper, even with a high percentage of copper in brass, and this was verified through comparison using diffusion length and RGB data in Aoguchi and Akaguchi. We demonstrate these colored brass foils are used as art materials, and our results expanded material using possibility of brass foil.
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| 030029 |
Turkey |
Synthesis of Macro Porous Activated Carbon from Waste Polyethylene Terephthalate (PET) Bottles and Investigation of Usability in Dye Removal from Water Sources |
BUCA IMSEF |
Melike Uc |
Increasing consumption and developing technology cause the environmental pollution. Nowadays, one of the major problems are the plastic materials which are used in the packaging industry. They constitute the majority of solid wastes. The most used type of plastics is polyethylene terephthalate which is called PET. PET wastes get smaller by time and mix in water. This situation poses danger to underwater creatures. Besides, plastics cause wide and unaesthetic waste areas. In this study, it is aimed to investigate the usability of the activated carbon synthesized from polyethylene terephthalate (PET) bottles to remove the impurities caused by the industrial dyes in water sources. For this purpose, the methylene blue adsorption efficiency of activated carbon, which synthesized from waste PET bottles, was investigated. In this study, activated carbons were synthesized from waste polyethylene terephthalate (PET) bottles by chemical activation method in two different material / activation agent (ZnCl2) ratios (1/1 and 1/2). The synthesis reaction efficiency was determined as 8.18 ± 0.5%. To determine the uptake capacity of activated carbons, they were mixed with methylene blue solutions. Uptake capacity was determined as 22.4 % and 1.2 % for 1/1 activated carbon and 1/2 activated carbon, respectively. The 1/1 activated carbon was chosen for further studies due to its high uptake capacity. Characterization analysis were performed by conducting SEM, SEM-EDS, Langmuir Isotherm equation and specific surface area. According to analyzes, it is seen that PET-AC has a porous surface and its specific surface area is 206.46 m2 /g. In order to examine the usability of PET-AC in dye removal from water sources, methylene blue adsorption was performed in different methylene blue concentrations. As a result of the experiments, 94.07% uptake efficiency was obtained at 50 mg / L methylene blue concentration (pH 4.72, 25°C, 24 hours). As a result of the study conducted, it is seen that PETAC is an effective material for the removal of pollution in the waters caused by the dye material that are resulted from the industrial wastes.
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| 030030 |
Malaysia |
Sustainable G-Polymer From Industrial Waste |
SMK SERI DAMAI |
Nur Fatima Bt. Faruvash Khan
Muhammad Luqmanul Hakim Bin Azyme |
This study focuses on the pre-treatment of paper sludge ash (PSA) as a by-product of paper milling industry that contains high amount of calcium, yet low in silica. The presence of high calcium content in geopolymer system will accelerate the setting time of fresh geopolymer and may disrupt the development of its mechanical strength. Therefore, in this study, the refinement of PSA properties was conducted by treating raw PSA in hydrochloric acid solution with different molarities of 0.5 M, 1.0 M and 2.0 M. The pre-treatment process was mainly purposed to decrease the amount of calcium and other impurities through leaching mechanism. Based on the experimental results, 2.0 M hydrochloric acid solution (HCl) was determined as the optimum concentration due to its ability in removing higher amount of calcium from the ash, yet still able to increase the amount of silica. Compression test on the hardened properties of geopolymer specimen also showed the deceleration of fresh fly ash based geopolymer and produced a more workable fresh geopolymer.
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| 030031 |
Russia |
Direct reductive amination of camphor |
Moscow South-Eastern School named after V.I.Chuikov |
Ivan Smirnov
Artem Amangeldyev |
Terpenoids are an irreplaceable class of natural products. Camphoryl amines demonstrate biological activity, for example, they can inhibit reproduction of H1N1 virus. Camphoryl group can be used as an auxiliary group in asymmetric synthesis. Fenchonyl amine-based molecules are potential therapeutic agents for the treatment of Alzheimer’s disease. Herein we tried to synthesize camphoryl amines from camphor, cheap, non-toxic substrates, using the reductive amination reaction. We used various reductive agents (for example NaBH4, NaBH(OAc)3 and Fe(CO)5), in order to get the target product.
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