Abstract
In this study, a comparison was made of the absorption of kaolin in reducing Fe(II) metal in water by modifying kaolin with anionic surfactants and also irradiating kaolin with ultrasonics. The aim of this research is to compare the optimization of metal uptake in absorbing Fe metal in water so that it can improve water quality in Ulee Pulo, Dewantara, Aceh Utara. Kaolin was ground to a size of 100 mesh, then activated using 1 N HCl, A1 adsorbent with pure kaolin, A2 adsorbent modified with anionic surfactants, A3 kaolin adsorbent using ultrasonication. The adsorption process was carried out using adsorbents A1, A2 and A3 by varying the sampling time of 30, 60 and 90 minutes. The concentration of the absorbed metal was measured using an Atomic Absorption Spectrophotometer (AAS), while the characteristics used Fourier Transform Infrared Sectroscopy (FTIR) and Scanning Electron Microscope (SEM). The most significant result was Fe absorption with removal efficiency reaching 81% within 60 minutes.
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