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All Journal Molekul: Jurnal Ilmiah Kimia Jurnal Ilmiah Kanderang Tingang
Abdul Hadjranul Fatah
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Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

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Studies on Synthesis, Characterization, and Adsorption of Cationic Dyes from Aqueous Solutions Using Magnetic Composite Material from Natural Clay in Central Kalimantan, Indonesia I Made Sadiana; Karelius Karelius; Retno Agnestisia; Abdul Hadjranul Fatah
Molekul Vol 13, No 1 (2018)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (109.406 KB) | DOI: 10.20884/1.jm.2018.13.1.414

Abstract

Clay is a natural material from crystalline silicate with layered structures, has high cation exchange capacity, and large surface area. These advantages can be used as an adsorbent for the removal of contaminants in aqueous solutions, such as heavy metals and dyes. In Indonesia, clays from Java, Sulawesi, and Sumatra islands have been used as adsorbent, furniture, and construction materials. Due to limited information about basic characteristics of clay from Kalimantan, this clay has not been utilized well. Therefore, natural clay from Kalimantan, especially in Central Kalimantan, was used as adsorbent of cationic dyes in this present study. However, the clay has difficulty for separating the solid phase from aqueous solution after adsorption process. To solve this problem, combining clay with magnetic material was opted. The objectives of this study are to synthesize the magnetic composite material from natural clay by coprecipitation method and to characterize the synthesized magnetic composite material using an x-ray diffraction method, transmission electron microscopy, and vibrating sample magnetometer. The adsorption properties of the synthesized magnetic composite material were evaluated using rhodamine B and methylene blue dyes in aqueous solution. Before magnetic composite material was synthesized, the clay was previously being activated for removing impurities. The magnetic material formed in the structure of clay had magnetite with particle size of 2.75 nm and the magnetization value of 24.91emu/g. The adsorption capacities of natural clay, activated clay, and magnetic composite of clay in rhodamine B were 34.29, 76.27, and 81.46 mg/g, respectively, while in methylene blue were 30.25, 83.92, and 133.90 mg/g, respectively. These results suggested that magnetic composite of clay can increase the adsorption capacities against dyes and accelerate the separation of the adsorbent solid phase from aqueous solution with largest adsorption capacity on methylene blue dye.
Pengembangan Media Pembelajaran Kimia Dasar Berbasis Web Pada Pokok Bahasan Termokimia Abdul Hadjranul Fatah; Nopriawan Berkat Asi; Maya Erliza Anggraeni; Agtri Wulandari; Abdul Latif
Jurnal Ilmiah Kanderang Tingang Vol 12 No 1 (2021): Jurnal Ilmiah Kanderang Tingang
Publisher : FKIP Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37304/jikt.v12i1.122

Abstract

Penelitian ini bertujuan untuk menghasilkan produk media pembelajaran kimia dasar berbasis web pada pokok bahasan termokimia. Penelitian ini telah dilakukan menggunakan model penelitian dan pengembangan yang meliputi tahap perencanaan (planning), desain (design), dan pengembangan (development). Data dalam penelitian ini dikumpulkan menggunakan teknik angket menggunakan kuesioner ahli media, ahli materi dan pengguna, kemudian dianalisis secara deskriptif. Hasil penelitian dan pengembangan ini menunjukkan bahwa penilaian ahli materi diperoleh rerata skor 5 (sangat baik) untuk semua aspek. Penilaian ahli media diperoleh rerata skor 5 (sangat baik) untuk semua aspek. Rerata skor hasil tes mahasiswa kelompok atas 3,9, kelompok sedang 3,6, kelompok bawah 3,2, sehingga diperoleh rerata skor 3,57 (A-) atau sangat baik. Penelitian dan pengembangan ini telah menghasilkan produk media pembelajaran kimia dasar pokok bahasan termokimia yang layak digunakan oleh mahasiswa kelompok atas, kelompok sedang dan kelompok bawah.
Co-Authors Abdul Latif Agtri Wulandari I Made Sadiana Karelius Karelius Maya Erliza Anggraeni Nopriawan Berkat Asi Retno Agnestisia