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INDONESIA
Jurnal Pendidikan Fisika Indonesia
Published by Universitas Negeri Semarang
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Core Subject : Science, Education,
Education Physics
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Articles 33 Documents
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Search results for , issue "Vol 11, No 2 (2015)" : 33 Documents clear
APPLICATION OF VERTICAL GRADIENT METHODS OF MICROGRAVITY TIME FUNCTION TO DETERMINE GROUND WATER REDUCTION IN SEMARANG PERIOD OF 2013 Khumaedi, K.; Supriyadi, S.; Pradana, A.; Imam, S.; Yusuf, M.; Sarkowi, M.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.3267

Abstract

The development of Semarang city requires the availability of water for daily use and industry in line with population growth. Uncontrolled use of water will damage the groundwater system. The purpose of this study was to determine the zone of the decrease of water level to obtain information about area that utilizes excess water. The method used is a micro-gravity vertical gradient between times. Gravity measurements were done at 124 points spread evenly between May and October 2013. The results showed that there was a decrease in ground water level in the Industries area Kaligawe, Tanah Mas, and Tlogosori which was identified with the vertical gradient anomaly of micro gravity between the times from May to October 2013. The regions which have high negative changes in ground water level (1.2-1.4 m / year) were the monitoring wells Madukoro 2, LIK Kaligawe and PT Aquaria which are the industrial areas. Exploitation of ground water in industrial areas is relatively high compared to the other regions.Perkembangan kota Semarang yang menuntut ketersediaan air untuk keperluan sehari-hari dan industri seiring dengan pertambahan jumlah penduduk. Pemanfaatan air yang tidak terkendali akan menyebabkan sistem  air tanah rusak. Tujuan penelitian ini adalah menentukan zona penurunan muka air tanah untuk memperoleh informasi daerah yang memanfaatkan air secara berlebihan. Metode yang digunakan adalah gradien vertikal gaya berat mikro antar waktu. Pengukuran gaya berat di lakukan di 124 titik yang tersebar merata pada periode Mei dan Oktober 2013. Hasil peneltian menunjukkan telah terjadi penurunan muka air tanah di lingkungan Industri Kecil Kaligawe, perumahan Tanah Mas, Perumahan Tlogosori yang ditandai dengan anomali gradien vertikal gaya berat mikro antar waktu Mei-Oktober 2013. Wilayah yang memiliki perubahan muka air tanah negative tinggi (1,2-1,4 m/tahun), berada di sekitar sumur pantau Madukoro 2, LIK Kaligawe dan PT Aquaria dimana tutupan lahan di sekitar sumur pantau tersebut merupakan kawasan industri. Eksploitasi air tanah pada kawasan industri relatif tinggi jika dibandingkan dengan kawasan lainnya. 
THE APPLICATION OF AUTHENTIC ASSESSMENT WITH FEEDBACK TO IMPROVE THE COMPETENCE OF MTS 2 BANDUNG STUDENTS IN CONSTRUCTING A SCIENTIFIC REPORT OF MOTION MATERIAL IN SCIENCE LEARNING Nuryantini, A. Y.; Setiadi, T.; Kurniawan, K.; Farida, I.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4227

Abstract

This research was carried out to describe the application of authentic assessment with feedback in science learning of motion material which can increase the grade VIII G MTs Negeri 2 Kota Bandung students’ ability of making scientific reports and to analyse the increase. This classroom action research was performed at Madrasah Tsanawiyah Negeri 2 Kota Bandung in the even semester 2014/2015 academic year with 35 students consisting of 18 boys and 17 girls as the subjects. The success indicator of the research was a minimum of 80% of the students were able to make scientific reports in good category (with minimum score of 80). The result showed that the application of the authentic assessment with the feedback increased the ability of students of MTs Negeri 2 Kota Bandung in writing the scientific reports. There was an increase of students’ ability in writing the scientific reports from the first cycle to the second one. Initially, 14% of the students got good category in the first cycle. This number increased, then, to 83% in the second cycle. Penelitian ini dilakukan untuk mendeskripsikan penerapan penilaian otentik dengan feedback dalam pembelajaran IPA materi gerak yang dapat meningkatkan kemampuan menulis laporan ilmiah dan menganalisis peningkatan kemampuan menulis laporan ilmiah siswa kelas VIII G MTs Negeri 2 Kota Bandung. Penelitian yang dilakukan merupakan penelitian tindakan kelas. Subjek penelitian adalah 35 orang siswa kelas VIII G yang terdiri dari 18 laki-laki dan 17 perempuan. Tempat penelitian dilaksanakan di Madrasah Tsanawiyah Negeri 2 Kota Bandung  pada semester genap tahun pelajaran 2014/2015. Indikator keberhasilan dari penelitian tindakan kelas yang dilakukan adalah minimal 80% dari siswa memiliki kemampuan menulis laporan ilmiah dalam kategori baik (dengan skor minimal 80). Hasil penelitian menunjukkan bahwa kami telah berhasil menerapkan penilaian otentik dengan feedback yang dilakukan guru dalam pembelajaran IPA materi gerak untuk meningkatkan kemampuan siswa MTsN 2 Bandung dalam menyusun laporan ilmiah. Kemampuan menulis laporan ilmiah siswa mengalami  peningkatan siklus I ke siklus II  yang semula sebesar  14 %  menjadi 83 % jumlah siswa yang berkategori baik.
INDEPENDENT LEARNING STRATEGY OF NATURAL SCIENCE WITH “ONE DAY ONE DIARY FOR SCIENCE” PROGRAM Herlianti, P. S.; Linuwih, S.; Dwijananti, P.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4255

Abstract

Learning behavior and metacognitive skill of students affect cognitive value and level of understanding of each student. The application of the "One Day One Diary for Science" program is needed in learning to train students metacognitive skills and independence in learning science. This study was performed to find out the learning behavior, the development of metacognitive skills, and both relation. The study was conducted by observation, interview, and documentation on 33 junior high school students. The result of the study was analyzed the domain, taxonomy, components, and culture growth, so the data of learning behavior and metacognitive skill of students based on the score level can be obtained. Based on data analysis, learning behavior and metacognitive skill on a higher grade is higher than the other classes. There is a strong correlation between learning behavior and metacognitive skills.Perilaku belajar dan kemampuan metakognitif  siswa mempengaruhi nilai kognitif dan tingkat pemahaman setiap siswa. Penerapan program  “ One Day One Diary for Science”  diperlukan dalam pembelajaran sains untuk melatih kemampuan metakognitif dan kemandirian siswa dalam belajar IPA. Penelitian ini bertujuan untuk mengetahui perilaku belajar, perkembangan kemampuan metakognitif, dan hubungan keduanya. Penelitian dilakukan dengan cara pengambilan data melalui  pengamatan, wawancara, dan dokumentasi serta triangulasi data dengan cara memperpanjang lama pengamatan pada 33 siswa Sekolah Menengah Pertama. Hasil penelitian dianalisis dengan analisis domain, taksonomi, komponensial, dan temuan budaya, sehingga diperoleh data perilaku belajar sains  dan kemampuan metakognitif siswa berdasarkan tingkatan kelas. Berdasarkan analisis data, perilaku belajar sains dan kemampuan metakogntif pada kelas atas lebih tinggi dibandingkan kelas lain. Terdapat hubungan yang kuat antara perilaku belajar dan kemampuan metakognitif
DESIGN OF THERMAL EQUIPMENT MILLING FOR FABRICATING THE TIO2 PHOTOCATALYSTS COATED GRAIN POLYMERS Aliah, H.; Setiawan, A.; Masturi, M.; Abdullah, M.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4219

Abstract

Organic waste water treatment can be conducted with technique of photocatalytic. Photocatalytic activity involves factors light intensity and amount of catalyst. In order this process can take place optimally, the catalyst material coating on the surface of the material buffer such as polymer shaped grains can be an alternative method. Setting the temperature and the duration of heating automatically is very efficient in controlling the physical characteristics of the photocatalyst materials. In this experiment, modification done on of the two types of thermal equipment milling namely cylindrical equipment milling equipped with heater and equipment milling based electric oven. The testing process of the thermal equipment milling performed with controlled temperature in the range of 110 ° C and setting the timer to 60 minutes. In testing the thermal characteristics of milling equipment, it takes as long as 220 minutes for each immobilization process using cylindrical milling and 65 minutes when using an electric oven. Setting the temperature and time in the electric oven milling  can be performed automatically, which can not be performed using cylindrical milling. Milling equipment based electric oven has also been used in the selection of buffer polymer materials and fabricate TiO2 photocatalysts which tested on photodegradation of organic compound of methylene blue (MB).Penjernihan air limbah organik dapat dilakukan dengan teknik fotokatalisis. Agar aktivitas fotokatalitik yang melibatkan faktor intensitas cahaya dan jumlah katalis dapat berlangsung secara optimal, pelapisan material katalis pada permukaan material penyangga berupa bulir polimer termoplastik dapat menjadi salah satu alternatif. Pengaturan temperatur dan lamanya pemanasan secara otomatis sangat efisien dalam mengendalikan karakteristik fisis material fotokatalis Dalam penelitian ini dilakukan modifikasi terhadap dua jenis peralatan thermal millng, yaitu peralatan milling cylinder yang dilengkapi dengan komponen pemanas dan peralatan miling berbasis oven listrik. Proses pengujian milling dilakukan dengan temperatur terkontrol pada kisaran 110 °C dan pengaturan timer 60 menit. Dalam pengujiankarakteristik termal kedua alat tersebut, dibutuhkan waktu selama 220 menit untuk setiap proses imobilisasi menggunakan milling cylinder dan 65 menit bila menggunakan peralatan berbasis oven listrik. Pengaturan temperatur dan waktu pada alat berbasis oven listrik dapat dilakukan secara otomatis, yang tidak dapat dilakukan menggunak milling cylinder. Peralatan milling berbasis oven listrik ini juga telah digunakan dalam pemilihan polimer penyangga material fotokatalis TiO2 serta pabrikasi fotokatalis TiO2 yang diujikan dalam fotodegradasi senyawa organik metilen biru (MB).
IMPLEMENTATION OF LEVELS OF INQUIRY ON SCIENCE LEARNING TO IMPROVE JUNIOR HIGH SCHOOL STUDENT’S SCIENTIFIC LITERACY Arief, M. K.; Utari, S.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4233

Abstract

Scientific literacy is the key learning  outcomes for all students. Based on observation, scientific literacy of student is less facilitated in science  learning.  Learning of levels of inquiry is one of  solution alternative to increase science literacy. So that, that aim of this study to improve scientific literacy for junior high school students through implementing levels of inquiry in science learning with the theme of global warming. This study used a weak experimental with one group pretest-posttest design. The sample in this study are 35 student at 7th  grade at junior high school in Second semester in academic year 2014/2015. The data of this study is taken by scientific literacy test. The results showed that explain phenomena scientifically competence and interpret data and evidence scientifically competence has increased significantly. Meanwhile, evaluate and design scientific enquiry competence is not significantly increased. In addition, the domain knowledge indicates that the three aspects of the knowledge which consist of content knowledge, procedural knowledge, and epistemic knowledge has increased significantly. Literasi sains merupakan hasil belajar kunci bagi semua siswa. Berdasarkan hasil observasi, literasi sains siswa kurang difasilitasi dalam proses pembelajaran IPA di kelas. Pembelajaran levels of inquiry merupakan salah satu alternatif solusi untuk meningkatkan literasi sains. Oleh karena itu, tujuan penelitian ini adalah untuk meningkatkan literasi sains siswa SMP melalui penerapan levels of inquiry pada pembelajaran IPA tema pemanasan global. Penelitian ini menggunakan metode eksperimen lemah dengan desain penelitian one group pretest-posttest. Sampel dalam penelitian ini adalah 35 siswa kelas VII SMP pada semester genap tahun pelajaran 2014/2015. Data penelitian diperoleh melalui tes literasi sains. Temuan dalam penelitian ini adalah kompetensi menjelaskan fenomena ilmiah dan kompetensi menginterpretasikan data dan bukti ilmiah meningkat secara signifikan. Sedangkan, kompetensi mengevaluasi dan merancang penyelidikan ilmiah tidak meningkat secara signifikan. Selain itu, pada domain pengetahuan menunjukkan bahwa ketiga aspek pengetahuan yaitu pengetahuan konten, pengetahuan prosedural, dan pengetahuan epistemik meningkat secara signifikan. 
DEVELOPING SCIENCE LEARNING INSTRUMENTS BASED ON LOCAL WISDOM TO IMPROVE STUDENT’S CRITICAL THINKING SKILLS Wahyuni, S.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4228

Abstract

This research aims to develop learning instruments of science i.e. textbook, student worksheet, syllabus, and lesson plan based on local wisdom that can improve critical thinking skills of junior high school students. Indicators of students critical thinking skills include interpretation, analysis, evaluation and inference. This study is a Research and Development by using analysis, desaign, development, implementation and evaluation (ADDIE) method. Expert validation was conducted with the expert test related to the format, content/material, and language. The instruments ware used on the collection data are documentations, validation sheets, observation sheets, and tests. The result of the instrument in the 7th grade of junior high school at Bustanul Ulum Panti Jember showed that there are the improvement of critical thinking skills of student based on the data from test and observation. According to indicator of critical thinking skills, the n-gain value is around 0.47, means moderate interpretation. The conclusions of this research are the learning instruments of science based on local wisdom which develope in the valid category is quite effective to improve students critical thinking skills.Penelitian ini bertujuan mengembangkan perangkat pembelajaran IPA yang berupa Buku ajar, LKS, Silabus, dan RPP berbasis kearifan lokal untuk meningkatkan kemampuan berpikir kritis siswa SMP. Indikator kemampuan berpikir kritis siswa mencakup interprestasi, analisis, evaluasi dan inferensi. Penelitian ini merupakan penelitian Research and Development dengan metode Analysis, Desaign, Development, Implimentation and Evaluastion (ADDIE). Validasi ahli dilakukan dengan uji expert terkait dengan format, isi/materi, dan bahasa. Instrumen yang digunakan dalam pengambilan data adalah dokumentasi, lembar validasi, lembar observasi, dan tes. Hasil ujicoba instrumen di kelas VII SMP Bustanul ulum Panti Kabupaten Jember menunjukkan adanya peningkatan kemampuan berpikir kritis siswa, baik yang diambil dari teknik tes maupun observasi. Berdasarkan indikator kemampuan berpikir kritis diperoleh nilai rata-rata N gain 0,47 dengan interpretasi sedang. Simpulan penelitian ini menunjukkan perangkat pembelajaran IPA berbasis kearifan lokal yang dikembangkan dalam katagori valid sehingga cukup efektif dalam meningkatkan kemampuan berpikir kritis siswa.
DEVELOPMENT OF PHYSICS STUDENT WORK SHEET (SWS) TO BUILD SCIENCE PROCESS SKILL VALUED CONSERVATION Yulianti, D.; Yulianto, A.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4246

Abstract

Student Work Sheet (SWS) which contains only a summary of the material and exercises does not train students to investigate and develop conservation values. The research objective is to also prepared worksheets guided inquiry that can enhance science process skills, understanding of the concept and develop conservation value. Elements of inquiry and conservation value generated through work instructions and investigation. The study was performed by using one group pretest-posttest design. Research procedures include observation and identification of weaknesses worksheets, planning, early product development and initial field trials. Feasibility and legibility using questionnaires and tests hiatus. The value of understanding the concept derived from the pretest-posttest. Data science process skills gained from the observation during the lesson. Conservation values obtained from the students self-assessment questionnaire and assessment questionnaire between friends. The analysis showed guided inquiry SWS easy to understand and very fit for use as teaching materials. Test gain showed guided inquiry SWS can enhance science process skills and conceptual understanding, and can be used as a medium to develop conservation value.LKS yang hanya berisi ringkasan materi dan latihan soal tidak melatih siswa melakukan penyelidikan dan mengembangkan nilai konservasi. Tujuan penelitian R&D ini adalah menyususn LKS yang mampu meningkatkan keterampilan proses sains, pemahaman konsep dan nilai konservasi. Nilai konservasi dimunculkan melalui petunjuk kerja dan kegiatan penyelidikan.Ujicoba menggunakanOne Group Pretest-Posttest Design. Prosedur penelitian meliputi observasi dan identifikasi kelemahan LKS, perencanaan, pengembangan produk awal dan uji coba lapangan awal. Uji kelayakan dan keterbacaan menggunakan angket dan tes rumpang. Nilai pemahaman konsep  diperoleh dari pretest-posttest. Data keterampilan proses sains diperoleh dari hasil observasi selama pembelajaran. Nilai konservasi siswa diperoleh dari hasil angket penilaian diri dan angket penilaian antarteman. Hasil analisis menunjukkan LKS mudah dipahami dan sangat layak digunakan sebagai bahan ajar. Uji gain menunjukkan LKS dapat meningkatkan keterampilan proses sains  dan pemahaman konsep, sertadapat digunakan sebagai media untuk mengembangkan nilai konservasi.
IMPLEMENTASI MODEL PEMBELAJARAN INQUIRY TRAINING DALAM PEMBELAJARAN FISIKA UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR FORMAL SISWA Nasution, D.; Mihardi, S.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4679

Abstract

Low ability of formal thinking students caused the learning outcomes they get too low. This study aims to determine the effectiveness of the inquiry learning model training in improving students ability to think formal. The design was used quasi-experimental "non-equivalent groups pretest-posttest design". Implementation  experimental class learning with inquiry learning model training, control class learning with direct instruction. Data obtained through a formal thinking ability test thinking ability. Learning model efectivity in improving formal thinking ability is determined based on the gain score average which normalized by average difference test of statistic, namely t test. The results of the reasearch found that the inquiry training learning model is more effective in improving students formal thinking ability compared with the direct instruction learning model. The N-gain percentage of formal thinking ability of students in the experiment class in the indicators of hypothetical deductive thinking, combination thinking and reflection thinking are in the medium category, just proportional thinking is the high category. N-gain average percentage of control class for the hypothesis deductive thinking is just in the low category, while the proportional thinking, combination thinking and reflection thinking are in the medium category.Rendahnya kemampuan berpikir formal siswa menyebabkan hasil belajar yang mereka peroleh juga rendah. Penelitian ini bertujuan untuk mengetahui efektivitas  model pembelajaran inquiry training dalam meningkatkan kemampuan berpikir formal  siswa. Disain yang digunakan adalah kuasi eksperimen “non-equivalent groups pretest-posttest design”. Implementasi pembelajaran kelas eksperimen dibelajarkan dengan model pembelajaran inquiry training, kelas kontrol dengan model pembelajaran direct instruction.  Data kemampuan berpikir formal diperoleh melalui tes kemampuan berpikir formal. Efektivitas  model pembelajaran  dalam meningkatkan kemampuan berpikir formal ditentukan berdasarkan rerata skor gain yang dinormalisasi dengan statistik uji beda rerata, uji t.  Hasil penelitian ditemukan bahwa pembelajaran dengan model inquiry training lebih efektif dalam meningkatkan kemampuan berpikir formal siswa dibandingkan dengan pembelajaran direct instruction. Persentase N-gain kemampuan berpikir formal untuk siswa kelas eksperimen untuk indikator berpikir hipotesis deduktif, berpikir kombinasi dan refleksi berada pada kategori sedang, berpikir proporsional pada kategori tinggi. Untuk siswa kelas kontrol perentase N-gain rata-rata untuk berpikir hipotesis deduktif  berada pada kategori rendah, sementara berpikir proporsional, berpikir kombinasi dan berpikir refleksi berada pada kategori sedang.
CRITICAL THINKING SKILLS IN INTEGRATED SCIENCE LEARNING VIEWED FROM LEARNING MOTIVATION Cholisoh, L.; Fatimah, S.; Yuniasih, F.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4241

Abstract

The study aimed to determine the effect of Predict Discuss Explain Observe Discuss Explain and Small Group Discussion strategies toward critical thinking skills and the influence of learning motivation toward critical thinking skills. This study was a quasi experiment with the non-equivalent pretest-posttest design. Data were analysed by inferential statistics of two way analysis of variance and regression analysis. The results showed that Predict Discuss Explain Observe Discuss Explain and Small Group Discussion strategies were influential toward critical thinking skills and the average of students critical thinking skills using Small Group Discussion strategy was better than those experiencing Predict Discuss Explain Observe Discuss Explain strategy. Furthermore, learning motivation were also influential toward critical thinking skills. Students having high learning motivation were better than students having low learning motivation. Regression analysis showed learning motivation and critical thinking skills have positive correlation. Influence of learning motivation toward critical thinking skill was about 6.4%.Penelitian ini bertujuan untuk mengetahui pengaruh strategi Predict Discuss Explain Observe Discuss Explain dan Small Group Discussion terhadap kemampuan berpikir kritis, dan pengaruh motivasi belajar terhadap kemampuan berpikir kritis. Penelitian ini merupakan penelitian quasi experiment menggunakan desain the non-equivalent pretest-posttest. Data dianalisis menggunakan statistik inferensial Analisi Varian dua jalur dan analisis regresi. Hasil penelitian menunjukkan bahwa strategi Predict Discuss Explain Observe Discuss Explain dan Small Group Discussion berpengaruh terhadap kemampuan berpikir kritis, rata-rata kemampuan berpikir krtis siswa yang menggunakan strategi Small Group Discussion lebih baik daripada siswa yang menggunakan strategi Predict Discuss Explain Observe Discuss Explain. Selain itu, motivasi belajar berpengaruh terhadap kemampuan berpikir kritis. Rata-rata kemampuan berpikir kritis siswa yang mempunyai motivasi belajar tinggi lebih baik daripada siswa yang mempunyai motivasi belajar rendah. Berdasarkan analisis regresi, motivasi belajar dan kemampuan berpikir kritis memiliki hubungan yang positif. Motivasi belajar memberikan pengaruh sebesar 6,4% terhadap kemampuan berpikir kritis.
MULTILAYER POROUS COMPOSITE FROM WASTE GLASS FOR WATER FILTRATION Aji, M. P.; Wiguna, P. A.; Rosita, N.; Susanto, S.; Savitri, M. I.; Said, M. A.N.; Sulhadi, S.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015): July 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4218

Abstract

Multilayer porous composite have been produced through the heating process at temperature T=700oC for 2.5 h. Single layered porous composite was made with a varied mass percentage of from PEG polymer  1% to 10%. Double-layered porous composite were made by the arrangement of porosity (4:3)%, (4:2)% and (3:2)%, while the three-layers porous composite have an arrangement (4:3:2)%. Performance of multilayer porous composite for water filtration with pollutants of methylene blue 100 ppm was estimated from the absorbance spectrum. Rejection of methylene blue pollutants from single layered porous composite increases when the fraction of PEG polymer tend to be smaller in the matrix. Meanwhile, the double layered porous composite has a degradation of methylene blue pollutants are better than one layer. Triple layered porous composite have good performance for the water filtration where all the pollutants of methylene blue be able to be filtered.   Komposit pori berlapis telah dihasilkan dengan proses pemanasan pada temperatur T=700oC selama 2.5 jam. Komposit pori satu lapis dibuat dengan variasi persen massa polimer PEG 1% hingga 10%. Komposit pori dua lapis dibuat dengan susunan porositas (4:3)%, (4:2)% dan (3:2)%, sedangkan komposit pori tiga lapis memiliki susunan porositas (4:3:2)%. Kinerja komposit pori berlapis untuk filter air dengan polutan methylene blue 100 ppm diestimasi dari spektrum absorbansi. Rejeksi polutan methylene blue dari komposit pori satu lapis meningkat saat fraksi polimer PEG cenderung lebih kecil dalam matrik komposit. Sedangkan, komposit pori dua lapis memiliki kemampuan untuk degradasi polutan methylene blue yang lebih baik dari satu lapis. Komposit pori tiga lapis memiliki kinerja yang baik untuk filter air dimana seluruh polutan methylene blue mampu disaring. 

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