Adsorption Isotherm Studies of Rhodamine B on Citrus sinesis Peel

Gani Purwiandono, Puji Lestari, Wahyu Widodo, Marlina Marlina, Nadia Aprilia


Adsorption of Rhodamine B on Citrus sinesis peel biosorbent has been conducted. The adsorption process was carried out in neutral pH for 90 min. The active surface of the Citrus sinesis peel biosorbent was 15 m2/g and the density was 0.52 g/cm3. The adsorption mechanism of Rhodamine B on Citrus sinesis peel biosorbent was studied using 4 adsorption model; Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich. The adsorption fitted the Freundlich model with the regression value of 0.906. This indicates that the adsorption of Rhodamine B on the surface of Citrus sinesis peel biosorbent was a multilayer interaction.


Adsorption; Rhodamine B, Citrus sinesis peel biosorbent, Freundlich adsorption isotherm


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Indonesian Journal of Chemical Research

ISSN 2354-9610 (print), ISSN 2614-5081 (online)

Published by: 

Department of Chemistry

Faculty of Mathematics and Natural Sciences

Universitas Islam Indonesia, Yogyakarta

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