Abstract

Crosslinked starch ester is one of the important biomaterials, biodegradable, low cost and effective adsorbents for removing various types of organic contaminants. Crosslinked starch represents an important class of starch derivatives. The native starch has been modified to functionalize the structural properties of starch and make it able to act as a sorbent for organic pollutants using chemical modification. The cross-linked starch ester for four starch types, which are corn, rice, potato, and tapioca has been prepared with epichlorohydrin (EPI) as a crosslinker and trisulfonated sodium amine (N(SO3Na)3 as a sulfating agent. Fourier transform spectroscopy (FT-IR), zeta potential (ZP), scanning electron microscopy (SEM), atomic force microscopy (AFM) and Brunauer–Emmett–Teller (BET) were used to characterize the morphology of native and modified starch. Crosslinked potato starch ester (CLPSE) evidently is the more preferable modified starch type that has the greatest potential for adsorption removal for aniline, phenol, and antibiotic in 100 ppm initial concentration with 75.6%, 82.3%, and 90.7% respectively when compared to the other modified starch.

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