Adsorpsi Kolesterol Lemak Sapi dengan N-Metil Kitosan

Mardiyah Kurniasih, Tien Setyaningtyas, Dwi Kartika, Ende Hopsah Badriyah, Kapti Riyani

Abstract


N-metil kitosan merupakan derivat kitosan. Muatan polikationik N-metil kitosan dapat bereaksi dengan muatan negatif seperti kolesterol. Penelitian ini bertujuan untuk sintesis N-metil kitosan dan mempelajari adsorpsi kolesterol oleh N-metil kitosan. Dalam penelitian ini telah dilakukan sintesis N-metil kitosan dari kitosan yang memiliki derajat deasetilasi sebesar 95% melalui mekanisme reduktif aminasi. Berdasarkan hasil sintesis diperoleh N-metil kitosan dengan kadar air sebesar 5,17%, bobot molekul 130.106,8 g/mol, dan indeks swelling 495,039%. N-metil kitosan kemudian diuji kemampuan adsorpsinya terhadap kolesterol. Studi adsorpsi berupa kinetika dan isoterm adsorpsi juga telah dilakukan. Berdasarkan hasil penelitian, adsorpsi kolesterol menggunakan N-metil kitosan mengikuti model adsorpsi isoterm Freundlich yang menunjukkan bahwa adsorpsi terjadi pada sistem yang heterogen dan lapisan adsorpsi yang terbentuk bersifat multilayer. N-metil kitosan memiliki kemampuan adsorpsi terhadap kolesterol dalam lemak sapi sebesar 11,61 mg/g pada kondisi adsorpsi terbaik yaitu panjang gelombang maksimum 565,3 nm dengan waktu kontak 40 menit dan perbandingan konsentrasi adsorben dengan adsorbat 1:300.

Keywords


adsorpsi, lemak sapi, kitosan, kolesterol, N-metil kitosan

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DOI: https://doi.org/10.23955/rkl.v12i2.9058

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