Halimah, - (2015) DAYA ADSORPSI ARANG AKTIF KULIT BUAH COKELAT (THEOBROMA CACAO L) SEBAGAI ADSORBEN LOGAM BERAT KROMIUM. Undergraduate thesis, UNIMED.
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Abstract
Penelitian ini bertujuan untuk mengetahui daya adsorpsi arang aktif yang berasal dari kulit buah cokelat yang digunakan sebagai adsorben ion logam Cr6+. Suhu aktivasi arang bervariasi dari 3000C, 4000C dan 5000C. Hasil penelitian memperlihatkan kemampuan arang aktif kulit cokelat untuk mengadsorpsi ion logam Cr6+ adalah 1.4340 mg/g. Suhu aktivasi maksimum yang diperlukan untuk adsorpsi ion Cr6+ dengan menggunakan kulit cokelat adalah 5000C. Semakin tinggi suhu aktivasi semakin banyak ion logam Cr6+ yang teradsorpsi karena semakin besar luas permukaan menyebabkan banyak zat yang teradsorpsi. Dari persamaan linier y = 15,63x - 1464, R² = 0,910 dapat ditentukan nilai kapasitas adsorpsi (Q0) = 0.0640 mg/g dan intensitas adsorpsi (b) = -0.0107 L/mg. Dari kurva linier dapat diketahui model isotherm Langmuir mencirikan mekanisme adsorpsi yang terjadi pada adsorpsi arang aktif kulit buah cokelat terhadap ion logam Cr6+.
Item Type: | Thesis (Undergraduate) | ||||||
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Call Number: | 546.663 Hal d | ||||||
Keywords: | Adsorpsi; arang aktif; kulit buah cokelat; ion logam Cr(VI) | ||||||
Subjects: | Q Science > QD Chemistry Q Science > QD Chemistry > QD71 Analytical chemistry |
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Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia | ||||||
Depositing User: | Mrs Desy Sry Yani | ||||||
Date Deposited: | 08 Apr 2016 08:34 | ||||||
URI: | http://digilib.unimed.ac.id/id/eprint/12357 |
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