Optimasi Pembuatan Kitosan Dari Kitin Limbah Cangkang Rajungan (Portunus pelagicus) Untuk Adsorben Ion Logam Merkuri

L. H. Rahayu; S. Purnavita

doi:10.14710/reaktor.11.1.45-49

DOI: https://doi.org/10.14710/reaktor.11.1.45-49

Optimasi Pembuatan Kitosan Dari Kitin Limbah Cangkang Rajungan (Portunus pelagicus) Untuk Adsorben Ion Logam Merkuri

*L. H. Rahayu - , Indonesia

S. Purnavita - , Indonesia

Published: 12 Jun 2017.

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Abstract

Penelitian ini bertujuan untukmenentukan kondisi optimum factor suhu dan waktu proses deatilasi dari khitin cangkang rajungan (Portunus pelagicus) menjadi khitosan dan mengetahui pengaruh pH adsorpsi dari kitosan terhadap penurunan jumlah ion merkuri (%). Proses deasetilasi dilakukan dengan memanaskan campuran khitin dengan larutan NaOH 50% (rasio 1:20 b/v) pada suhu 70 ⁰C, 80 ⁰C, 90 ⁰C dan 100 ⁰C dengan waktu proses masing-masing 30, 60, 90 dan 120 menit. Parameter respon adalah derajad deasetilasi khitosan. Hasil penelitian menunjukkan bahwa derajad deasetilasi khitosan tertinggi adalah 79,65% yang dihasilkan pada suhu 90 ⁰C dan waktu proses 120 menit. Khitosan selanjutnya diuji kemampuan adsorpsinya terhadap ion merkuri pada pH 2, 3, 4, 5, dan 6. Hasil uji aplikasi khitosan sebagai adsorben ion logam merkuri menunjukkan bahwa semakin tinggi pH adsorpsi semakin besar penurunan jumlah ion merkuri (%), dimana hubungan keduanya ditunjukkan dengan persamaan y = 7,50x + 26,11.

Kata kunci : adsorpsi, cangkang rajungan, deasetilasi, litin, khitosan

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Keywords: adsorpsi, cangkang rajungan, deasetilasi, litin, khitosan

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Section: Research Article

Language : INDONESIA

In Volume 11, Nomor 1, Juni 2007

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