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All Journal Jurnal Zeolit Indonesia Jurnal Media Akademik (JMA)
Nurul Widiastuti
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Religion Humanities Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences Other

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ADSORPTION OF Cu(II) ON ZEOLITE A SYNTHESIZED FROM COAL BOTTOM ASH OF PT. IPMOMI PAITON Nurul Faradilah Said; Nurul Widiastuti
Jurnal Zeolit Indonesia Vol. 7 No. 1 (2008)
Publisher : Jurnal Zeolit Indonesia

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Abstract

The study aimed to utilizing coal bottom-ash into zeolite A that was used as absorber metal ion of Cu(II). Zeolite A is made from bottom-ash using alkali fusion followed by hydrothermal processes. Melting temperature of Alkali conducted at 750°C during 12 h ours and hydrothermal processes at 100°C with molar ratio of SiO2/Al2O3 1,9. The result XRD showed that zeolite was formed is zeolite A. Product of Zeolite A was examined the ability of adsorption metal ions of Cu (II). In this test conducted several parameter variations that influences are period, concentration, pH, and temperature. The result showed that zeolite A can adsorbing Cu(II) up to 83,35% with the concentration of Cu(II) 50mg/l at pH 8 for 360 minutes. This study was learning some aspects of adsorption process were kinetic adsorption and isothermal adsorption. The result indicate that the kinetics adsorption of Cu(II) at zeolit A was following model of pseudo-first order, while isothermal adsorption is following model of Freundlich.
INFLUENCES OF TIME AND RATIO OF Si/Al ON FORMATION ZEOLITE A FROM BOTTOM ASH CARBON FREE PLTU PT. IPMOMI WITH HYDROTHERMAL METHODS R. A. Syukuri Nikmah; Nurul Widiastuti; Hamzah Fansuri
Jurnal Zeolit Indonesia Vol. 7 No. 1 (2008)
Publisher : Jurnal Zeolit Indonesia

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Abstract

This study aimed to utilize bottom-ash PLTU PT. IPMOMI, Probolinggo. Synthesis zeolite A conducted with directly method of hydrothermal. Initially, bottom-ash calcined at temperature of 800oC during 4 hours for eliminating residu of carbon from baking of coal, then it was dissolved with alkali NaOH, NaAlO2 and water deionization with comparison molar of 3.165 Na2O: Al2O3: 1.926 SiO2: 128 H2O. Crystallization of hydrothermal conducted by variation time (12-144 hours) and ratio molar of Si/Al (1; 1.2 and 1.4). The result XRD analysis showed that kinds form of zeolite is mixture of zeolite A, X, P and sodalite. The most form dominant of Zeolite with various variations condition hydrothermal is zeolite A with orthorombik structure which was formed at hydrothermal temperature of 160°C during 24 hours.
PENINGKATAN HASIL BELAJAR SISWA TENTANG KONVERSI SATUAN PANJANG MELALUI MEDIA PATUNG “PAPAN HITUNG” PADA SISWA KELAS III SDN O1 KLEGEN MADIUN Altiara Dhesis Widyalawarti; Candra Dewi; Nurul Widiastuti
Jurnal Media Akademik (JMA) Vol. 3 No. 8 (2025): JURNAL MEDIA AKADEMIK Edisi Agustus
Publisher : PT. Media Akademik Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62281/v3i8.2683

Abstract

Tujuan dilakukan penelitian Tindakan kelas ini yaitu untuk meningkatkan kualitas pembelajaran Matematika materi satuan panjang Sekolah Dasar. Prosedur PTK yang diterapkan mengancu pada metodologi action research, PTK ialah penelitian praktis yang diterapkan dalam memperbaiki pembelajaran di kelas. Action research, juga dikenal sebagai penelitian tindakan kelas (PTK), merupakan jenis refleksi diri kelompok terhadap suatu masalah sosial yang bertujuan untuk meningkatkan penalaran dan kesetaraan dalam konteks pelaksanaannya. Penelitian praktis yang bertujuan untuk meningkatkan pembelajaran di kelas dikenal sebagai penelitian tindakan kelas. Penelitian ini merupakan upaya yang dilakukan guru untuk meningkatkan pembelajaran di kelas. Latihan mandiri ialah sebuah Latihan, yakni cara siswa menjawab soal yang telah diberikan oleh guru setelah mendapatkan materi pembelajaran di kelas. Hasil latihan mandiri 1 menunjukkan bahwa hasil belajar dalam mengerjakan soal menunjukkan rata-rata siswa memperoleh nilai 66,48% sedangkan menggunakan media hitung nilai rata – rata siswa 74,26% sehingga terlihat jelas terdapat perbedaan peningkatan hasil belajar antar siklus II menggunakan media hitung lebih tinggi dibandingkan siklus I. Dari PTK ini bisa disimpulkan bahwa Penggunaan Media Patung “Papan Hitung” terbukti dapat meningkatkan kualitas pembelajaran. Maka peneliti menyarankan guru menggunakan media mekar dalam proses pembelajaran Matematika.
Co-Authors Altiara Dhesis Widyalawarti Candra Dewi Hamzah Fansuri Nurul Faradilah Said R. A. Syukuri Nikmah