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Characteristics and Mineral Content of Sediment at Muara Pulau Kayu (MPK) of Southwest Aceh District Purnawan, Syahrul; Jalil, Zulkarnain; Akmal, Chairul; Ilhamsyah, Yopi
Aceh International Journal of Science and Technology Vol 7, No 1 (2018): April 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

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.
Dampak Penggantian Fe3O4 secara Parsial dengan Abu Sekam Padi (ASP) terhadap Porositas dan Kuat Tekan Keramik Komposit Clay-Fe3O4 Machmud, Muhammad Nizar; Jalil, Zulkarnain
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 3 (2015): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Berdasarkan kajian pendahuluan diketahui bahwa penggunaan pasir laut dan penggantiannya dengan abu sekam padi (ASP) hingga pada fraksi berat tertentu dalam pembentukan keramik komposit clay belum mampu menunjukkan kuat tekan seperti yang diinginkan. Ditambah lagi karena kandungan Cl-dan SO4- yang bersifat korosif, penggunaan pasir laut tersebut tidak lagi direkomendasikan. Mineral utama dari pasir besi yaitu Fe3O4selanjutnya diajukan sebagai penggantinya untuk memproduksi keramik komposit clay baru. Karena pasir besi merupakan sumber daya alam yang tidak dapat diperbaharui, maka penggunaan mineral Fe3O4 tersebut perlu dibatasi. Selanjutnya, ASP masih dipilih untuk menggantikan Fe3O4secara parsial demi keberlanjutan produksi dari material-material keramik tersebut. Keramik dari komposit clay-Fe3O4/ASP tersebut selanjutnya diperkenalkan dalam makalah ini dan nantinya dirancang sebagai material bagi komponen-komponen yang menerima pembebanan berupa tekan dan juga termal. Dua tipe ASPlalu disiapkan dan selanjutnya dikarakterisasimenggunakan spektrometer X-ray fluorescence (XRF). Tidak terdapat perbedaan yang signifikan pada komposisi kimia dari keduanya. Namun, keduanya memiliki bulk density yang berbeda. Hasil pengujian porositas terhadap material keramik komposit tersebut menunjukkan bahwa penggantian Fe3O4dengan ASP meningkatkan porositas material. Hasilpengujian tekan menunjukkan bahwa meningkatnya berat fraksi dari ASP diikuti oleh penurunan kuat tekan material. Analisis X-ray diffraction (XRD) terhadap material baru tersebut menunjukkan bahwa sebagian besar dari Fe3O4 telah bertransformasi menjadi Fe2O3 dan transformasi tersebut selanjutnya dapat menentukan besarnya porositas dan juga kuat tekan dari material tersebut.
Synthesis of Natural Hydroxyapatite from Aceh’s Bovine Bone Fadhilah, Nurul; Irhamni, Irhamni; Jalil, Zulkarnain
Journal of Aceh Physics Society Volume 5 Number 2, September 2016
Publisher : Aceh Physics Society

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Abstract

Telah dilakukan penelitian yang mengkaji tentang sintesis hidroksiapatit berbasis tulang sapi lokal Aceh. Kandungan kalsium (CaO) di dalam tulang sapi dapat dimanfaatkan untuk mensintesis hidroksiapatit. Pada penelitian ini, hidroksiapatit disintesis dari tulang sapi yang telah dicuci bersih dan dihilangkan dari lemak  dengan menggunakan NaOH. Tulang sapi dikeringkan dan dikalsinasi terlebih dahulu pada temperatur 1000oC selama 2 jam. Tulang sapi kering kemudian ditumbuk hingga dihasilkan serbuk. Untuk mendapatkan ukuran partikel yang seragam, serbuk tulang sapi dimilling dengan kecepatan putaran 250 rpm selama 5 jam sehingga dihasilkan serbuk tulang sapi murni yang berukuran nano. Kemudian serbuk dikarakterisasi menggunakan XRD (X-Ray Diffraction) untuk membuktikan terbentuknya fasa CaO. Serbuk CaO yang telah terbentuk disintesa menjadi hidroksiapatit menggunakan metode solid statereaction dengan cara menambah asam posfat. Selanjutnya, serbuk CaO dan asam posfat disintering pada temperatur 900oC selama 2 jam. Penentuan fasa hidroksiapatit ini dilakukan dengan melakukan pengujian XRD. Berdasarkan hasil pengujian XRD, fasa CaO dan hidroksiapatit telah berhasil terbentuk sempurna. The research that examines the synthesis hydroxyapatite of Aceh’s bovine bone has been done. Calcium oxide (CaO) in bovine bone can be used to synthesized hydroxyapatite. In this research, hydroxyapatite synthesized from bovine bone that washed clearly and removed from the fat with adding NaOH. Bovine bone dried and calcined first at temperature of 1000oC for 2 hours. Then, dried-bovine bone is granulated become a powder. For uniformity particle size, bovine bone powder was milled with a 250 rpm rotation speed for 5 hours to produce pure bovine bone powder in nano-sized. Then, the bovine bone powder was characterized using X-Ray Diffraction (XRD) to evidence that CaO phase has been formed. CaO powder will be syntehesized become hydroxyapatite using solid state reactiod method with adding phosphoric acid. Finally, powder CaO and phosphoric acid sintering at temperature of 900oC for 2 hours. Determination of hydroxyapatite phase is done by testing the XRD. Based on test results of XRD, CaO and hydroxyapatite phase has been successfully formed.
Identification of Oxide Compound in Dolomite Mineral from Aceh Tamiang Region Sari, Nirmala; Jalil, Zulkarnain; Rahwanto, Adi
Journal of Aceh Physics Society Volume 2 Number 1, March 2013
Publisher : Aceh Physics Society

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Abstract

Indonesia has abundant mineral especially carbonate-based mineral, ike dolomite. Particularly in Aceh province's, the largest dolomite deposits is available in Aceh Tamiang district around 1.9 billion tons. Unfortunately, current use of dolomite in the industry and other applications is still limited. In this work we report the advanced preparation of dolomite using calcinations method. Whereas, with this method, the dolomite mineral can be processed into calcium and magnesium oxide which has a very wide field of application and higher values. To obtain optimal results, we also identify the effect of temperature on the formation of oxide compounds. Preliminary study using XRF founded that dolomite in village Selamat is known as the highest concentration of CaO (61.20%) followed by MgO (25.28%). It is also showed that the main phase obtained by XRD is dolomite (CaMg(CO3)2). Furthermore, after the calcinations process at 700 °C, it was founded that the formation of dolomite were CaCO3 and MgO, whereas at temperatures of 900 °C mostly the CaCO3 has decomposed into CaO. SEM observations showed that dolomite has the composition of particles distributed homogeneously along the particle agglomerate when it calcinations.
Pengamatan In-Situ Tekanan dan Temperatur pada Pembentukan MgH2/Ni melalui Metode Reactive Mechanical Alloying (RMA) untuk Aplikasi Material Penyimpan Hidrogen Handoko, Erfan; Pradipta, Aditia; Soegijono, Bambang; Jalil, Zulkarnain
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 02 (2014): IJAP Volume 04 Issue 02 Year 2014
Publisher : Department of Physics, Sebelas Maret University

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Abstract

The observation on reactive mechanical alloying (RMA) process had been done to form MgH2 material with adding Ni nanoparticles as catalist for hydrogen storage material applications. Pressure and temperature of material forming were recorded by microcontroller set for 30 minutes. Mg with adding Ni 5 wt % was milled by High Energy Ball Mill (HEBM) at H2 atmosphere in 1 atm of pressure. The measurement results showed that the pressure had been changed and temperature also changes up to 38oC. This process proves that the alloying betwen Mg and H2 had been formed. The X-ray diffraction pattern identify MgH2 phase. SEM image showed the morphology of MgH2 particles.
Studi Katalis Ni Nano pada Material Penyimpan Hidrogen MgH2 yang Dipreparasi melalui Teknik Mechanical Alloying Sari, Nirmala; Rahwanto, Adi; Jalil, Zulkarnain
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 01 (2016): IJAP VOLUME 06 ISSUE 01 YEAR 2016
Publisher : Department of Physics, Sebelas Maret University

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Abstract

The main obstacle which hinders the application of fuel cell fuels in motor vehicles today is the hydrogen storage tubes. One of the latest efforts in hydrogen storage research is to insert hydrogen in certain metals or called solid state hydrogen storage. Magnesium (Mg) is regarded as one of the material potential candidates absorbing hydrogen, because theoretically, it has the ability to absorb hydrogen in the large quantities of (7.6 wt%). This amount exceeds the minimum limit which is targeted Badan Energi Dunia (IEA), that is equal 5 wt%. However Mg has shortage, namely its kinetic reaction is very slow, it takes time to absorb hydrogen at least 60 minutes with very high operating temperatures (300-400 °C). The aim of this study is to improve the hydrogen desorption temperature hydrogen storage material based MgH2. In this method, milling of material is done in the time of 10 h with the variation of catalyst inserts a for 6wt%, 10wt% and 12 wt%. The results from XRD measurements in mind that the sample was reduced to scale nanocrystal. Phase that appears of the observation of result XRD is MgH2 phase as the main phase, and followed by Ni phase as minor phase. The result of observations with DSC, to the lowest temperature obtained on the sample with a weight of catalyst 12 wt% Ni catalyst that is equal to 376 °C. These results successfully repair pure temperature of Mg-based hydrides.
PENERAPAN MODEL PEMBELAJARAN INKUIRI TERBIMBING UNTUK MENINGKATKAN KETERAMPILAN PROSES SAINS DAN MOTIVASI BELAJAR SISWA SEKOLAH DASAR Rahmani, Rahmani; Halim, Abdul; Jalil, Zulkarnain
Jurnal Pendidikan Sains Indonesia Vol 3, No 1 (2015): April 2015
Publisher : Program Studi Magister Pendidikan IPA Program Pascasarjana Unsyiah

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Abstract

Penelitian ini bertujuan untuk mengetahui peningkatan keterampilan proses sains dan motivasi belajar siswa pada materi sifat-sifat cahaya setelah menerapkan model pembelajaran inkuiri terbimbing. Hipotesis yang dirumuskan dalam penelitian ini adalah penerapan model pembelajaran inkuiri terbimbing dapat meningkatkan keterampilan proses sains dan motivasi belajar siswa pada materi sifat-sifat cahaya. Metode yang digunakan dalam penelitian ini adalah eksperimen semu (quasi-exsperimental research). Desain penelitian yang digunakan dalam penelitian ini adalah one group pretest posttest design. Populasi dari penelitian ini adalah seluruh siswa kelas V SD Negeri 37 Banda Aceh tahun ajaran 2014/2015 yang berjumlah 30 siswa. Sampel  dalam penelitian ini adalah seluruh populasi dijadikan sampel. Kelas V dijadikan sebagai kelompok eksperimen yang dikenai model pembelajaran inkuiri terbimbing. Pada awal pembelajaran diberi pretest dan akhir pembelajaran diberi posttes dengan menggunakan instrumen yang sama. Teknik pengumpulan data dalam penelitian ini adalah dengan tes dan angket, teknik pengolahan data menggunakan statistik uji-t. Berdasarkan hasil uji normalitas dan homogenitas data diperoleh bahwa data keduanya normal dan homogen. Dari hasil perhitungan untuk keterampilan proses sains diperolehthitung = 29,1274  sedangkan nilai ttabel= 1,6827 dan hasil perhitungan untuk motivasi belajar siswa diperolehthitung = 7,427 sedangkan nilai ttabel= 1,6827. Oleh karena thitung > ttabel maka Ho ditolak dan terima Ha. Jadi dapat disimpulkan bahwa penerapan model pembelajaran inkuiri terbimbing dapat meningkatkan keterampilan proses sains dan motivasi belajar siswa pada materi sifat-sifat cahaya.
Ukuran Butir dan Sortasi Sedimen Pada Sungai Gampong Leungah Kabupaten Aceh Besar Handoko, Harry; Jalil, Zulkarnain; Purnawan, Syahrul
Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Vol 2, No 2 (2017): April 2017
Publisher : Universitas Syiah Kuala

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Abstract

Sediment distribution in the river of Gampong Leungah was conducted to describe the sediment condition in the river bottom. Samples were taken at 10 stations which were divided into river stream and estuary area. Coring method was applied to collect sediment samples using modified 2.5 inch of PVC tube. Approximately of 10 cm of sediment thickness from surface were used for further processed using sieving analysis. We found that river stream area has a coarser sediment particle with better sorted sediment compared to estuary area. The input sediment materials from shore area resulting mixed sediment condition as generated to the poorer sortation condition in estuary. Distribusi sedimen sungai di Gampong Leungah dilakukan untuk menggambarkan pola sebaran sedimen yang terjadi di daerah tersebut. Pengambilan sampel sedimen dilakukan pada 10 stasiun yang terbagi pada daerah aliran sungai dan daerah muara Pengambilan sampel sedimen dilakukan dengan metode coring yang menggunakan pipa paralon berdiameter 2,5 inch dengan panjang 40 cm. Sampel yang digunakan dalam identifikasi adalah lapisan sedimen dengan ketebalan 10 cm dari permukaan. Karakteristik sedimen pada daerah aliran sungai lebih kasar dan sortasi yang lebih baik di bandingkan dengan sedimen yang berada di daerah muara. Adanya percampuran dengan sedimen pantai membuat daerah muara memiliki kondisi sortasi yang lebih buruk.
Penerapan Model Pembelajaran Inkuiri Terbimbing Untuk Meningkatkan Keterampilan Proses Sains (KPS) Siswa Sekolah Dasar Rahmani, Rahmani; Halim, Abdul; Jalil, Zulkarnain
Jurnal Pencerahan Vol 10, No 2 (2016): September 2016
Publisher : Majelis Pendidikan Daerah (MPD) Aceh dan Universitas Syiah Kuala

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Abstract

The aim of the study was to determine the improvement of student science process skills in the material properties of the light after applying the guided inquiry learning model. The hypothesis of the study was the application of the guided inquiry learning model can improve the student science process skills in the material properties of the light. The quasi-experimental was used in this study and one group pre and post tests design was performed.  The population of this study was all fifth-grade students of primary school (SD) Negeri 37 Banda Aceh in 2014/2015 school year, amounting to 30 students. All of the population members were used as the samples. The test and questionnaire were used to collect the data.  The students were given the pretest and posttest learning using the same instrument at the beginning and end of the study. The data were subjected to the  statistical t-test. Based on the results of normality and homogeneity test data, it was obtained that data are normal and homogeneous. The results showed that science process skills were obtained that t = 29.1274, while the value table = 1.6827. Therefore tcount> t-table then Ho was rejected and Ha was accepted. Hence, it is concluded that the application of guided inquiry learning model can improve the science process skills of students in the material properties of the light
Phase Composition and Magnetic Behaviour of Iron Sand from Syiah Kuala Beach Prepared by Mechanical Alloying Jalil, Zulkarnain; Sari, Eva Novita; B, Ismail A; Handoko, Erfan
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): IJAP Volume 04 Issue 01 Year 2014
Publisher : Department of Physics, Sebelas Maret University

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It has recently been investigated that ball milling can improve the magnetic properties of natural iron sand significantly. In this work, we present the phase composition and magnetic behavior of iron sand from Syiah Kuala Beach, Banda Aceh. Samples were prepared by mechanical alloying method using a Fritsch planetary ball mill for 20 hours. As the results, it was shown by XRD testthat Fe3O4 (magnetite) appears as the majority phase and the magnetic properties observation shown that the magnetization saturation (Ms) and remanent (Br) was decreased with the increasing of the coercivity (Hc).