Adsorpsi Zat Warna Methylene Blue Dengan Menggunakan Karbon Aktif Dari Gambut Fibrik
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Abstract
Salah satu zat warna yang digunakan pada industri tekstil yang sangat penting dan relatif murah adalah methylene blue karena mudah larut dalam air. Dampak negatif dari zat warna methylene blue dapat mempengaruhi lingkungan. Salah satu metode yang digunakan adalah adsorpsi menggunakan arang aktif yang berbahan dasar gambut fibrik. Tujuan dari penelitian ini adalah untuk mengatahui variasi waktu kontak antara karbon aktif yang terbuat dari tanah gambut dengan zat warna tekstil methylene blue terhadap penurunan konsentrasi zat warna methylene blue. Arang aktif dibuat dari gambut fibrik melalui proses pirolisis pada suhu 500C dengan waktu 120 menit dan aktivasi menggunakan H3PO4 20%. 25 ml larutan methylene blue konsentrasi 75 ppm dikontakkan dengan arang aktif dengan waktu kontak 20, 40, 60, 80, 100, dan 120 menit. Waktu kontak optimum yang diperoleh pada penelitian ini adalah 60 menit dengan efisiensi adsorpsi sebesar 99,67% dan kapasitas adsorpsi sebesar 3,7377 mg/g. Model adsorpsi isoterm yang sesuai pada penelitian ini adalah adsorpsi isoterm langmuir dengan nilai R2 sebesar 1.
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