Geochemistry of warm springs in the Ie Brôuk hydrothermal areas at Aceh Besar district

Idroes, Rinaldi; Yusuf, Muhammad; Alatas, Muksin; Subhan, Subhan; Lala, Andi; Muslem,; Suhendra, Rivansyah; Idroes, Ghazi Mauer; Suhendrayatna, Suhendrayatna; Marwan, Marwan; Riza, M.

doi:10.1088/1757-899x/523/1/012010

Cited by 14 publications

(16 citation statements)

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“…However, the energy storage capacity of batteries is very limited, and for this reason some scientists are attempting to discover another type of energy storage materials that can store significant amount of energy [11][12][13].Calcium is one of the most abundant metals on earth. It can be mostly found as an ion in seawater [14], as well as geothermal hot springs [15][16][17][18]. It can be also found as an oxide in limestone and fossilized remnant sites [14].…”

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confidence: 99%

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Impregnation of CaO from Eggshell Waste with Magnetite as a Solid Catalyst (Fe3O4/CaO) for Transesterification of Palm Oil Off-Grade

et al. 2020

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In this work, calcium oxide (CaO) extracted from eggshell impregnated with magnetite (Fe 3 O 4 ) is prepared successfully and it had been applied on transesterification of palm oil off-grade. Prior experiment, the eggshells material are powdered and calcined at 900 • C then impregnated with Fe 3 O 4 and recalcined. The obtained Fe 3 O 4 /CaO catalyst is characterized using X-ray diffraction and Braunaeur-Emmet-Teller (BET) surface area. The influence of various parameters including recalcined time and temperature are investigated. The prepared catalyst is tested for transesterification of palm oil off-grade to produce biodiesel in which the optimal conditions of a methanol/palm oil off-grade molar ratio of 10:1, the catalyst weight of 6%, the reaction temperature of 70 • C, and the reaction time of 2 h. The transesterification product was analyzed using GC-MS, which showed the biodiesel yield of 90% at the recalcined temperature of 600 • C and reaction time of 2 h. It has been noted that the catalyst activity is achieved when the moderate recalcination temperature is applied and the disordered structure of the catalyst is maintained. This study also confirms that CaO impregnated with Fe 3 O 4 could be a solid catalyst for the biodiesel synthesis through transesterification reaction of palm oil off-grade.Catalysts 2020, 10, 164 2 of 13 this issue, several countries have successfully implemented some renewables from bioenergy, including biogas, biodiesel, and bioethanol [2][3][4][5]. On the other sides, some countries have also successfully generated the electrical power from renewable energy resources, such as geothermal, waves, hydro, wind, and solar energy [6][7][8][9][10]. However, there are some weak points resulted while the renewable energy is used, such as it is unstable, only available for certain periods, and therefore, its required the energy storage devices such as battery. However, the energy storage capacity of batteries is very limited, and for this reason some scientists are attempting to discover another type of energy storage materials that can store significant amount of energy [11][12][13].Calcium is one of the most abundant metals on earth. It can be mostly found as an ion in seawater [14], as well as geothermal hot springs [15][16][17][18]. It can be also found as an oxide in limestone and fossilized remnant sites [14]. However, in order to obtain the calcium from these resources is required the natural resource exploitation that is often given negative impact to environment. Considering the environmental safety, an alternative way has been used to produce calcium source, namely it produce from some renewable resources which are available abundantly in nature, such as egg shell material wastes, because the egg shell well known as a natural material contained lots of calcium oxide [19]. As fact, the eggshell waste has been an abundant wastes in environment either come from egg consumption or the food industries. The waste materials are interesting to use as eco-friendly material to produce CaO ...

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confidence: 99%

“…Calcium is one of the most abundant metals on earth. It can be mostly found as an ion in seawater [14], as well as geothermal hot springs [15][16][17][18]. It can be also found as an oxide in limestone and fossilized remnant sites [14].…”

mentioning

confidence: 99%

Impregnation of CaO from Eggshell Waste with Magnetite as a Solid Catalyst (Fe3O4/CaO) for Transesterification of Palm Oil Off-Grade

et al. 2020

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“…The variation is caused not only by the type of plant but also by the geological and geographical origins of the plant. The plant that grows in high salinity areas like geothermal [22][23][24] or limestone contains more various and higher metabolites.…”

Section: Introductionmentioning

confidence: 99%

Analysis of flavonoid compounds of Orange (Citrus sp.) peel as anti-main protease of SARS-CoV-2: A molecular docking study

Maulydia

Tallei

Ginting

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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SARS-CoV-2 is a new type of coronavirus that causes COVID-19. This virus was first detected in the city of Wuhan, China, at the end of 2019, and until now, it has become a global pandemic. The FDA recently approved Vekluty (remdesivir) for adults and certain pediatric patients who have COVID-19 and are sick enough to require hospitalization. One of the potential drug target candidates for SARS-CoV-2 is the main protease (Mpro). The purpose of this study was to analyze the flavonoid compounds found in orange (Citrus sp.) peel to determine its potential as anti-Mpro through a molecular docking study. The compounds were initially screened for drug-like properties and then docked using Autodock Vina in the PyRx emulator software. The docking results were visualized using the BIOVIA Discovery Visualizer 2020. The result showed that the binding free energy of hesperidin (-8.6 kcal/mol) was higher than nelfinavir (-8.5 kcal/mol). In addition, hesperitin (-7.3 kcal/mol), sakuranetin (-7.1 kcal/mol), isosacuranetin (-7.2 kcal/mol) and tetra-o-methylscutallerin (-6.8 kcal/mol) exhibited lower binding free energy value than control. Based on these results, hesperidin has the potential as an inhibitor of the main protease’s SARS-CoV-2.

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“…Some research showed that the secondary metabolite content of plants taken from geothermal areas is higher in species diversity and yields than plants from ordinary areas [23][24][25][26] In Aceh Province, there are several areas that have geothermal potential due to volcanic activity [27][28][29], one of which is Seulawah Agam Mountain in Aceh Besar District [30][31][32]. This mountain has several manifestations in several separate locations, namely the manifestation of Ie Brouk [33,34], Ie Seu-Um [35,36], and Ie Jue [37,38]. Lots of mineral-rich water in each of these manifestations spread to the surrounding environment so that it affects the mineral composition of the soil to the biosynthesis of plants that grow in that area [33].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of silver nanoparticles using Calotropis gigantea and its characterization using UV-Vis Spectroscopy

Kemala

Idroes

Khairan

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The use of Calotropis gigantea from Ie Seu-Um, Aceh Besar geothermal area for silver nanoparticles (AgNPs) synthesized has been reported. The process of synthesis AgNPs can be carried out with chemical methods, physical methods, and green synthesis methods, but in this study, the process is focused on the green synthesis method using C. gigantea flowers and leaves extract from Ie Seu-Um geothermal area, Aceh Besar. Phytochemical analysis showed that C. gigantea leaves contain alkaloids, steroids, tannins, phenolics, and saponins, while the flowers of C. gigantea contain alkaloids, terpenoids, steroids, flavonoids, tannins, phenolics, and saponins. The reaction of the AgNPs formation was observed by colour change formed. AgNPs-C. gigantea flower extract dan AgNPs-C. gigantea leaves extract showed the reddish-brown and brownish-yellow solution respectively after 48 h incubation in dark condition at room temperature. The result of the reaction characterized using UV-Vis Spectrophotometry showed that the phenomenon of Surface plasmone resonance (SPR) occurs in the mixture of nanoparticles formed. The concentration of AgNO3 as a reagent affected the SPR phenomenon. The result showed that particles formed are the same size and shape.

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Geochemistry of warm springs in the Ie Brôuk hydrothermal areas at Aceh Besar district

Cited by 14 publications

References 9 publications

Impregnation of CaO from Eggshell Waste with Magnetite as a Solid Catalyst (Fe3O4/CaO) for Transesterification of Palm Oil Off-Grade

Impregnation of CaO from Eggshell Waste with Magnetite as a Solid Catalyst (Fe3O4/CaO) for Transesterification of Palm Oil Off-Grade

Analysis of flavonoid compounds of Orange (Citrus sp.) peel as anti-main protease of SARS-CoV-2: A molecular docking study

Green synthesis of silver nanoparticles using Calotropis gigantea and its characterization using UV-Vis Spectroscopy

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