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All Journal EduChemia: Jurnal Kimia dan Pendidikan
Sari, Siska Novita
Sekolah Tinggi Analis Bakti Asih Bandung
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology

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Utilization of Nata De Coco as Adsorben in Methyl Orange Adsorption Sani Widyastuti Pratiwi; Siska Novita Sari; Ratna Nurmalasari; Meli Indriani
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (470.51 KB) | DOI: 10.30870/educhemia.v5i2.7977

Abstract

Methyl Orange was a textile waste that polluted the environment and harmed aquatic ecosystems and human life. It could affect the photosynthesis of oxygen regeneration and disrupt the biological activity of microbes in the water. One of the ways to deal with these wastes by adsorption using  Nata de coco. Nata de coco was used as an alternative adsorbent made from cellulose, which was a waste of coconut water in the process of making it easy, inexpensive, and biodegradable. This study aims to determine the effect of contact time and mass of  Nata de coco adsorbents on the adsorption of methyl orange. This research method includes three stages were adsorbent preparation, adsorption, and UV-Vis spectrometer analysis. The adsorption process was carried out with contact time variations of 30 and 60 minutes, variations in the mass of the adsorbent 0.05g; 0.1g; and 0.15g. The results showed the optimum adsorption conditions occurred at 60 minutes of contact time and an adsorbent mass of 0.15g with an adsorption efficiency of 44.66% and an adsorption capacity of 0.2066 mg/g.
Analisis Keterampilan Proses Sains Pembelajaran Larutan Penyangga Menggunakan Siklus Belajar Hipotesis Deduktif Siska Novita Sari; F.M. Titin Supriyanti; Gebi Dwiyanti
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 1 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.35 KB) | DOI: 10.30870/educhemia.v4i1.4055

Abstract

Penelitian ini bertujuan untuk memperoleh gambaran pencapaian Keterampilan Proses Sains dalam pembelajaran larutan penyangga dengan siklus belajar hipotesis deduktif. Metode penelitian yang digunakan adalah deskriptif dengan subyek penelitian sebanyak 40 siswa kelas XI di salah satu SMA Negeri di Kota Bandung yang dikategorikan ke dalam siswa kategori tinggi, sedang, dan rendah. Instrumen penelitian yang digunakan adalah Lembar Kerja Siswa, lembar observasi, dan pedoman wawancara. Hasil penelitian menunjukkan bahwa secara keseluruhan, siswa dapat mengembangkan 10 indikator KPS yang meliputi keterampilan mengamati, mengklasifikasikan, merencanakan percobaan, mengajukan pertanyaan, mengajukan hipotesis, meramalkan, menggunakan alat dan bahan, menafsirkan pengamatan, menerapkan konsep, berkomunikasi tergolong dalam kategori baik. Berdasarkan KPS setiap kategori kelompok siswa menunjukkan siswa kelompok tinggi dapat mengembangkan 10 indikator KPS dengan pencapaian sangat baik, sedangkan siswa kelompok sedang dan rendah dapat mengembangkan 10 indikator KPS dengan pencapaian baik
Co-Authors F.M. Titin Supriyanti Gebi Dwiyanti Meli Indriani Nurmalasari, Ratna Sani Widyastuti Pratiwi