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Advanced Engineering Science

Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-17-05-2022-190
Total View : 338

Abstract : Kaolin is an aluminosilicate mineral with low adsorption and degradation ability for organic dye molecules. Herein, to improve its adsorption properties, kaolin was composited with goethite, which is known to absorb and degrade dye molecules. The kaolin/goethite composites were synthesized via a simple low-temperature method. Specifically, a ferric ion solution and sodium hydroxide were consecutively added to commercial kaolin, and the mixture was aged at 40 °C for seven days. The synthesized composites were characterized by means of XRD and SEM, and their use in the adsorption and degradation of methylene blue dye was investigated. The ability of the composites to degrade organic matter was evaluated using the advanced oxidation process method. A mineralogical and morphological analysis of the synthetic products showed that goethite and the composites were synthesized on the surface of kaolin. However, the presence of amorphous iron material was detected in both types of products. The adsorption capacity of goethite, kaolin, and the kaolin/goethite composites for methylene blue was 54.64, 14.68, and 50.76 mg/g, respectively. The adsorption process fitted the Langmuir isotherm model with a correlation efficiency higher than 0.999. Goethite and the composites degraded effectively methylene blue upon addition of hydrogen peroxide. Although the composites exhibited lower adsorption and degradation ability than goethite, their structure was more stable, which was confirmed by the more efficient readsorption of methylene blue after the degradation process compared with kaolin and goethite. This study demonstrates that the adsorption and catalytic ability of kaolin can be modified by compositing with goethite..
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-13-05-2022-185
Total View : 346

Abstract : A documentary review was carried out on the production and publication of research papers on the study of the variable Economic Shock during the Covid-19 pandemic. The purpose of the bibliometric analysis proposed in this document is to know the main characteristics of the volume of publications registered in Scopus database during the period 2020-2021 in Latin American countries and to measure the impact that has been generated in the different economic sectors of Chile. A total of 46 publications were identified and the information provided by this platform was organized by means of tables and figures, categorizing the information by Year of Publication, Country of Origin, Area of Knowledge and Type of Publication. Once these characteristics were described, a qualitative analysis was used to refer to the position of different authors on the proposed topic..
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-09-05-2022-181
Total View : 345

Abstract : It is planned to develop a more compact ultra-wideband (UWB) patch antenna employing meta-materials. The total size is reduced, and the simulated impedance bandwidth operates from 3.4 to 9.1 GHz for a single-slot antenna, with the bandwidth improved (3.04 to 14.35 GHz) with an S-parameter of less than -10 dB by etching another slot in the patch and using CSRR instead of wire in the back of the ground plane. These two antennas have a bandwidth of 5.7GHz and 11.33GHz, respectively. Both substantial horizontal radiation and practical properties have been observed. As a result, these antennas could have some specific applications in the future for UWB wireless communications..
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-06-05-2022-179
Total View : 333

Abstract :

In general, meat processing in Indonesia is undertaken in various ways and often uses excessive heat which can lead to the formation of benzo (a) pyrene (BaP) compound that can harm public health. The aim of this study was to reduce the content of BaP in grilled buffalo meat by treating different types of meat and grilling time compared to buffalo meat without marinating. This study was conducted using a factorial randomized block design with 2 factors and 3 replications: (1) type of meat; buffalo and beef combined with marinade, (2) grilling time; 10, 20, 30 minutes. Marinated meat samples had a higher antioxidant capacity than unmarinated meat samples. Grilling time affected the level of BaP content produced. This study indicated that samples of marinated buffalo meat had lower BaP content than samples of marinated beef and unmarinated buffalo meat. Meanwhile, the increase in the duration of grilling led to an increase in the content of BaP in both types of meat. The conclusion of this study is that the use of the marinade in buffalo meat and grilling time of 10 minutes can inhibit the formation of the highest BaP compound in grilled buffalo meat.

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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-05-05-2022-178
Total View : 384

Abstract : The Shell Eco-Marathon is a competition for students, created by Shell, the British hydrocarbon energy company, and is held in the USA, Brazil, Europe and Asia. The challenge is to build the most energy-efficient vehicle. It seeks to transform the way mobility is viewed by allowing the use of alternative fuels, including electric or hybrid engines [1]. For the team, competition is the opportunity to propose efficient transportation in daily trips in a congested city (home-work-home), where reaching high speed is a utopia, so, low consumption becomes more important in addition to mitigating the impact on the environment and resulting in an economic benefit. Therefore, for the selection of the vehicle's engine, the balance of weight-power-consumption was found in the existing engine options..
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