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All Journal Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika Journal of Multidisciplinary Applied Natural Science
Nadia, Eka
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics Social Sciences

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PENGARUH PENGGUNAAN MODUL PEMBELAJARAN TERHADAP HASIL BELAJAR KOGNITIF SISWA Fatmi, Nuraini; Nadia, Eka; Siska, Deassy
Relativitas: Jurnal Riset Inovasi Pembelajaran Fisika Vol 4, No 2 (2021): Jurnal Riset Inovasi Pembelajaran Fisika
Publisher : Department of Physics Education, Faculty of Teacher Training and Education, UNIVERSITAS MA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/relativitas.v4i2.5257

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan modul pembelajaran terhadap hasil belajar kgnitif siswa. Jenis penelitian ini adalah Quasi Eksperimental Design, pupulasi yang diambil adalah kelas X semester genap 2020/2021 SMA Negeri 1 Teupah Selatan. Teknik pengambilan Sampel menggunakan desain non probability sampling. Sampel yang diambil adalah kelas X-MIA 1 sebagai kelas eksperimen yang terdiri dari 22 siswa dan kelas X-MIA 2 sebagai kelas kontrol yang terdiri dari 22 siswa. Instrument pengumpulan data menggunakan tes (pretest dan postest), instrument non tes (wawancara dan dokumentasi). Rata-rata nilai pretest pada kelas eksperimen dan kelas kontrol adalah 19.18 dan 18.91, sedangkan nilai rata-rata posttest pada kelas eksperimen dan kelas konrol adalah 80.36 dan 39.09. uji analisis data dilakukan dengan menggunakan uji independent T test dengan signifikan  pada hasil belajar kognitif siswa diperoleh signifikan- 2-tailed sebesar 0,000 < 0,05, sehingga  Ho ditolak dan Ha diterima. Berdasarkan analisis tes tersebut dapat disimpulkan bahwa terdapat pengaruh penggunaan modul pembelajaran terhadap hasil belajar kognitif siswa.
Preparation and Characterization of Cellulose-clay Composite using Indonesian Natural Bentonite for Cr(VI) Adsorption Julinawati, Julinawati; Nadia, Eka; Mustafa, Irfan; Suryati, Suryati
Journal of Multidisciplinary Applied Natural Science Articles in Press
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.289

Abstract

Contamination of Cr(VI) is of global concern, whereas the innovation in wastewater treatment is required. Combination of bentonite and cellulose could produce an effective adsorbent to treat Cr(VI)-containing wastewater. The aim of this study was to investigate the use of composite bentonite/cellulose (B/Cell) to remove Cr(VI) in the aqueous media, in which the bentonite was collected from local sources. The Na-bentonite was firstly prepared before proceeding to cellulose embedment. The resultant B/Cell was characterized for its functional groups, morphology, and crystallinity. The Cr(VI) adsorption capacity and removal efficiency were determined based on batch adsorption. Our findings revealed that the B/Cell composite with a 4:1 bentonite-to-cellulose mass ratio exhibited the highest removal efficiency (85.68%) among tested formulations. Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction analyses confirmed the successful integration of cellulose and structural modification of bentonite. Optimal adsorption was achieved at pH 3, 180-min contact time, and 10 g/L adsorbent dosage. Isotherm modeling showed excellent fits for Sips (R2 = 0.9992) model, with maximum adsorption capacity reaching 192.56 mg/g. Kinetic analysis indicated pseudo-second-order kinetics (R2 = 0.959, qe = 1.018 mg/g), suggesting a chemisorption mechanism. These results highlight the potential of the B/Cell composite as an efficient and low-cost adsorbent for Cr(VI) removal from aqueous environments.
Co-Authors Deassy Siska Irfan Mustafa Julinawati, Julinawati Nuraini Fatmi, Nuraini Suryati Suryati