Aceh International Journal of Science and Technology
Aceh International Journal of Science & Technology (AIJST) is published by the Graduate School of Syiah Kuala University (PPs Unsyiah) and the Indonesian Soil Science Association (Himpunan Ilmu Tanah Indonesia, Komda Aceh). It is devoted to identifying, mapping, understanding, and interpreting new trends and patterns in science & technology development, especially within Asian countries as well as other parts of the world. The journal endeavors to highlight science & technology development from different perspectives. The aim is to promote broader dissemination of the results of scholarly endeavors into a broader subject of knowledge and practices and to establish effective communication among academic and research institutions, policymakers, government agencies, and persons concerned with the complex issue of science & technology development. The Journal is a peer-reviewed journal. The acceptance decision is made based upon an independent review process supported by rigorous processes and provides constructive and prompt evaluations of submitted manuscripts, ensuring that only intellectual and scholarly work of the greatest contribution and highest significance is published. The AIJST publishes original conceptual and research papers, review papers, technical reports, case studies, management reports, book reviews, research notes, and commentaries. It will occasionally come out with special issues devoted to important topics concerning science & technology development issues. Scopes Starting in 2016, AIJST has focused on science and engineering aspects, and therefore now AIJST considers the topics but not limited to : Engineering (Mechanical, Chemical, Civil, Transportation) Geology and Geomorphology Environmental Science (Hydrology, Pollution, Water Treatment, Soil Science, Climatology) Physical Oceanography Mathematics Physics and Geophysics Geospatial and Information Technology
Articles
354 Documents
<![CDATA[Functional Group Structure of Bamboo and Pine Wood Biochar Due to Differences in Pyrolysis Temperature ]]>
<![CDATA[Darusman Darusman]]>;
<![CDATA[Syakur Syakur]]>;
<![CDATA[Eka Kurniasih]]>;
<![CDATA[Vera Puspita]]>;
<![CDATA[Zaitun Zaitun]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 11, No 1 (2022): April 2022 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.11.1.23437
<![CDATA[The quality of biochar produced through the pyrolysis process depends on the combustion temperature, duration of combustion, and the raw materials used. Biochar is a carbon-rich product resulting from the thermal decomposition of organic matter. Biochar from bamboo and pinewood was produced at 400℃ and 800℃ using a closed chamber where the temperature could be set. Biochar is made through carbonization with pyrolysis. This study aimed to find out the functional group characteristics of two types of raw materials, bamboo and pine wood. This research was conducted at the Environmental Soil Physics Laboratory, Universitas Syiah Kuala. Two types of feedstocks, bamboo, and pinewood, were used as sample experiments. The feedstocks were burned inside a closed chamber with no oxygen present. (Thermo scientific thermolyne F4820-33). The temperature was at 400℃ and 800℃, and a burning time of four hours. Fourier Transform Infra-Red (FTIR) was used to characterize the functional groups of biochar tested. Our research showed biochar from pinewood burned at a temperature of 400℃ gave the characteristics of the functional groups OH, CH, and C=O with strong intensity. It indicates that there was decomposition of organic matter into organic compounds taking place]]>
<![CDATA[Characteristics and Mineral Content of Sediment at Muara Pulau Kayu (MPK) of Southwest Aceh District ]]>
<![CDATA[Syahrul Purnawan]]>;
<![CDATA[Zulkarnain Jalil]]>;
<![CDATA[Chairul Akmal]]>;
<![CDATA[Yopi Ilhamsyah]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 7, No 1 (2018): April 2018 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.7.1.8524
<![CDATA[Study on sediment characteristics and mineral content at Muara Pulau Kayu (MPK) of Southwest Aceh District was conducted to find a general description of grain size and mineral content regarding to hydro-oceanographic process. Sampling was collected at MPK, Southwest Aceh District during March 2016. Purposive sampling method was used to determine 4 sampling sites covering estuary and beach area. Grain size and mineral content were analyzed with a set of sieves and X-Ray Fluorescence (XRF with standard reference mineral). Observation on the grain roundness and sphericity showed that sediment grains are generally more rounded at beach area. Mineral content at MPK are dominated by Si, Fe, K, Ca and Ti that are categorized into volcanic mineral which conclude that sediment at MPK originated from Mount Leuser which was an active volcano in the past.]]>
<![CDATA[A Review on Viscometer Devices for Gas Phase ]]>
<![CDATA[Elin Yusibani]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 1, No 3 (2012): December 2012 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.1.3.133
<![CDATA[Abstract -Viscosity, one of the transport properties, is a basic property required for developing any device in which fluid flows. In the present paper, major gas viscometers devices are reviewed. The review is covering to the pressures and the temperatures ranges, methods and accuracy of the instruments, and the coefficient of viscosity-range of the sample. This study is expected become useful information for any researcher who wants to develop a gas viscometer apparatus in a near future. By identifying the coefficient of viscosity-range and the easurement-range of temperatures and pressures, then we can choose the effective and efficient method to be developed.]]>
<![CDATA[Utilization of Oyster Shells as a Substitute Part of Cement and Fine Aggregate in the Compressive Strength of Concrete ]]>
<![CDATA[Bunyamin Bunyamin]]>;
<![CDATA[Amir Mukhlis]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 9, No 3 (2020): December 2020 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.9.3.17761
<![CDATA[The compressive strength of concrete depends on the physical characteristics of the concrete forming materials. Oyster shells originating from Krueng Neng, Aceh Besar are very abundant, left unattended by fishermen, causing pollution of the surrounding environment. Oyster shell dust contains CaO, which can be used as a partial substitution of cement. Therefore, it is necessary to study oyster shell ash as cement replacement and fine aggregate in concrete production. This research aims to determine the compressive strength of concrete using shell ash as cement replacement and fine aggregate. The oyster shells were obtained from Krueng Neng, Lamjamee Village, Jaya Baru, Aceh Besar District. The oyster shells were crushed with a Los Angeles Test machine and sieved with sieve size 2.36 mm for fine aggregate and sieve #200 for cement replacement. The water-cement ratios (w/c) were 0.4, 0.5 and 0.6. The results showed that concrete's compressive strength with 5% cement replacement level was higher than the concrete with cement only. Meanwhile, for other replacement levels, the compressive strengths of concrete specimens were lower than control specimens. ]]>
<![CDATA[Energy Audit of an Industry: A Case Study of Fabrication Company ]]>
<![CDATA[Olatunde Ajani Oyelaran]]>;
<![CDATA[Yau Yusuf Twada]]>;
<![CDATA[Olawale Monsur Sanusi]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 5, No 2 (2016): August 2016 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.5.2.4838
<![CDATA[Energy is one of the major inputs for the economic development of any country. In the case of the developing countries, the energy sector assumes a critical importance in view of the ever-increasing energy needs requiring huge investments to meet them. Energy audit will determine energy wastage and losses, and provide techniques and ways to minimize the losses. The payback period of the energy audit programmed for the industry was found to be 14 months. The energy consumption techniques suggested by the energy audit will not only minimize the losses but also reduce monthly electricity bill. The objective of Energy Management is to achieve and maintain optimum energy procurement and utilization, throughout the organization as to minimize energy costs and wastage without affecting production and quality. Energy Audit is the key to a systematic approach for decision-making in the area of energy management. It attempts to balance the total energy inputs with its use, and serves to identify all the energy streams in a facility.]]>
<![CDATA[The Determination of Kesongo Mud Volcano System Zone Using Seismic Interval Velocity at Potential Overpressure in The Tawun Formation, “F” Field, NE Java Basin ]]>
<![CDATA[Muhammad Burhannudinnur]]>;
<![CDATA[Wildan Tri Koesmawardani]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 10, No 3 (2021): December 2021 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.10.3.23649
<![CDATA[The Mud Volcano System (SMV) is an interesting topic, especially the relatively shallow oil and gas basin in North East Java. The Tawun Formation is an alternating layer of claystone that is quite thick. It has been confirmed in several oil and gas fields as a potential layer of a mud volcano system, specifically the Kesongo Mud Volcano System. The existence of this system is a challenge to further exploration; therefore, zoning is essential. The data used in this research were interval velocity cubes which were re-picked in each of the two bin sizes (2x25m) as the primary data. The well and velocity data were performed to determine the deviation from the Normal Compaction Trend (NCT). Furthermore, the seismic interval was confirmed with drilling data such as mud log and mud weight. The value of preliminary pore pressure was also derived from interval velocity using Eaton Equation which is confirmed by mud weight data. The Zoning of the Mud Volcano System was carried out via a depth slice at 3D seismic intervals. The results showed that the Tawun Formation has a Mud Volcano System prone zone at a depth of 204 m and decreases in geometry as the depth increases. Meanwhile, the OP-1 zone was the safest zone for exploration, followed by OP-2 but requires passage through the Kesongo Mud Volcano System zone of 1000 m thickness.]]>
<![CDATA[Adsorption of 2,4,6-trichlorophenol on kaolinite: DFT calculations ]]>
<![CDATA[Sara Ghezali]]>;
<![CDATA[Amina Mahdad-Benzerdjeb]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 6, No 3 (2017): December 2017 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.6.3.6987
<![CDATA[The aim of this work is to explore the adsorption process of an organic pollutant the 2,4,6-trichlorophenol on the clay mineral (kaolinite) surface in order to identify the sites of adsorption as well as conformations corresponding to the lowest energies. Ab-initio calculations have been used to investigate the adsorption process using a representative cluster model. According to the results obtained on the various studied models, the orientation of TCP on the surfaces clay affect the parameters such as : HOMO-LUMO energy gap, the enthalpy change (ΔH), the thermal Gibbs free energy (ΔG) and entropy contribution (ΔS). The results point out a preferential adsorption of TCP on the octahedral surface and the NBO analysis indicates that the electron donor-acceptor complex was the dominant adsorption mechanism.]]>
<![CDATA[A Study on Learning Pre-Algebra Using Interactive Multimedia Courseware Within Collaborative Learning Set-Up and E-Mail Interactions ]]>
<![CDATA[Mohd Sazali Khalid]]>;
<![CDATA[Sulaiman Yamin]]>;
<![CDATA[Sri Adelila Sari]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 1, No 1 (2012): April 2012 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.1.1.10
<![CDATA[Abstract – Many students at diploma level are weak in mathematics even after spending eleven years in Malaysian education system. However, throughout the world there are research studies been done with mixed results using technology and collaborative learning. The objective of this paper is to analyze the effect of learning pre-algebra using interactive courseware with collaborative learning by using STAD set ups with interactive courseware using e-mail facilities during team discussion only. Quasi experimental type research was used. The gain score (differences between post and pre test) between the two equivalent groups were obtained. Diploma Information Technology first year students in two different intake years 2009 and 2010 in UTHM were employed. ‘t-test’ results revealed the second group using e-mail is statistically significantly inferior to the group using purely interactive multimedia courseware CDiCL only with STAD team discussion. On average participants experienced higher gain scores in the first group (Mean = 3.28, SE=0.433), than participants in the second group (M=0.77, SE=0.354). This difference was statistically significant (t (74) = 4.51, p]]>
<![CDATA[Water Purification and Disinfection by using Solar Energy: Towards Green Energy Challenge ]]>
<![CDATA[Md Z.H. Khan]]>;
<![CDATA[Md R. Al-Mamun]]>;
<![CDATA[Suvash C. Majumder]]>;
<![CDATA[Md Kamruzzaman]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 4, No 3 (2015): December 2015 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.4.3.3019
<![CDATA[The aim of this work was to design a solar water treatment plant for household purpose. Water purification is the process of eradicating detrimental chemicals, biological poisons, suspended solids and gases from contaminated water. In this work we have reported an investigation of compact filter which is cost effective for developing countries and ease of maintenance. We have arranged a solar water disinfection system that improves the microbiological quality of drinking water at household level. We get 14 L pure water and 16 ml water vapour within 240 min by using filtration method. From our work we get hot water up to 49°C. The efficiency of the system at sunny days and cloudy days are 18.23% and 18.13% respectively. This simple solar hybrid system helps to remove turbidity as well as chemical and pathogenic contaminants from water sources in the most affordable, and expedient manner possibly.]]>
<![CDATA[Preparation and Application of ZnFe2O4/α-Al2O3 for Photocatalytic Degradation of Methylene Blue Dye and Real Textile Effluent ]]>
<![CDATA[Abdulhamid Hamza]]>;
<![CDATA[Alhaji Saleh Zanna Umara]]>;
<![CDATA[Diya'uddeen Basheer Hasan]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 8, No 2 (2019): August 2019 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.8.2.12543
<![CDATA[Present work was aimed at the development of α-Al2O3 supported ZnFe2O4 visible-light responsive photocatalysts. ZnFe2O4 and α-Al2O3 supported ZnFe2O4 were synthesized using co-precipitation method followed by calcination at 500 °C. The synthesized photocatalysts were characterized using x-ray diffraction (XRD) and scanning electron microscopy (SEM). The synthesized ZnFe2O4 has low crystallinity. The particle size of ZnFe2O4 is much smaller than that of the α-Al2O3 support, and ZnFe2O4 particles are dispersed on the surface of the crystalline α-Al2O3 support. 30 wt % ZnFe2O4/α-Al2O3 exhibited the highest photocatalytic activity for degradation of methylene blue dye than ZnFe2O4 and other α-Al2O3 supported photocatalysts containing 10 wt%, 20 wt% and 40 wt% ZnFe2O4. Kinetics of photocatalytic degradation of methylene blue dye using 30 wt% ZnFe2O4/Al2O3 obeys Langmuir–Hinshelwood kinetic model. Photocatalytic treatment of real textile wastewater resulted in more effective (when compared to photolytic treatment) in the reduction of wastewater’s chemical oxygen demand (COD), pH, conductivity and total dissolved solids (TDS). 30 wt% ZnFe2O4/Al2O3 was found to be more effective than unsupported ZnFe2O4 for the reduction of wastewater’s COD, pH, conductivity and TDS.]]>
