Perbandingan Karbon Aktif-Tempurung Nipah dan Karbon Aktif-Kulit Pisang Kepok Teraktivasi Kalium Hidroksida
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Penggunaan karbon aktif (activated carbon/AC) semakin luas seperti untuk reaksi kimia, adsorpsi limbah cair dan gas, serta sebagai katalis dalam proses katalitik. AC-tempurung nipah dan AC-kulit pisang kepok telah disintesis dengan aktivator kalium hidroksida (KOH) 0,5 M. Karbonisasi dilakukan dengan furnace pada suhu 300 °C selama 2 jam. Karakterisasi AC dilakukan dengan analisis kadar air, analisis kadar abu, analisis daya serap I2, dan analisis gugus fungsi sebelum proses aktivasi dan setelah proses aktivasi menggunakan FTIR. Nilai kadar air, kadar abu, daya serap terhadap I2berturut-turut adalah 1% ; 9,9%; 1307 mg/g (AC-tempurung nipah) dan 3% ; 7,4% ; 1777 mg/g (AC-kulit pisang kepok), memenuhi kriteria karbon aktif yang telah ditetapkan SNI. Hasil spektra FTIR AC-tempurung nipah dan AC-kulit pisang kepok menunjukkan adanya pergeseran bilangan gelombang serapan gugus -OH setelah aktivasi. Serapan gugus C=C aromatik mengindikasikan telah terbentuknya grafit.
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