Riva, Putri Lala2024-03-062024-03-062023-11PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/11355Clay is composed of alumina silicate minerals with a layered and porous crystal structure and can act as an adsorbent in adsorption processes. This research aims to determine the optimal adsorbent dosage (0.1; 0.3; 0.5; 0.7; 0.9 grams) in the adsorption process of Rhodamine B using natural Maredan clay. Characterization of Maredan clay was conducted before and after adsorption using Fourier Transform Infrared (FTIR) to identify the functional groups present in the adsorbent. The FTIR analysis of Maredan clay before and after adsorption revealed the presence of functional groups such as O-H stretching, Si-O, and Al-O-Si, with the addition of the C=C functional group after adsorption. The best condition was observed at an adsorbent dosage of 0.9 g, with an adsorption efficiency of 94.11% and an adsorption capacity of 2.6396 mg/g.enadsorptionadsorbent dosageclayArticle