| Summary: | Durian peel (DP) is an agricultural waste that is widely used in dyes and for organic and inorganic pollutant adsorption. In this study, durian peel was acid-treated to enhance its mycotoxin adsorption efficacy. The acid-treated durian peel (ATDP) was assessed for simultaneous adsorption of aflatoxin B<sub>1</sub> (AFB<sub>1</sub>), ochratoxin A (OTA), zearalenone (ZEA), deoxynivalenol (DON), and fumonisin B<sub>1</sub> (FB<sub>1</sub>). The structure of the ATDP was also characterized by SEM−EDS, FT−IR, a zetasizer, and a surface-area analyzer. The results indicated that ATDP exhibited the highest mycotoxin adsorption towards AFB<sub>1</sub> (98.4%), ZEA (98.4%), and OTA (97.3%), followed by FB<sub>1</sub> (86.1%) and DON (2.0%). The pH significantly affected OTA and FB<sub>1</sub> adsorption, whereas AFB<sub>1</sub> and ZEA adsorption was not affected. Toxin adsorption by ATDP was dose-dependent and increased exponentially as the ATDP dosage increased. The maximum adsorption capacity (Q<sub>max</sub>), determined at pH 3 and pH 7, was 40.7 and 41.6 mmol kg<sup>−1</sup> for AFB<sub>1</sub>, 15.4 and 17.3 mmol kg<sup>−1</sup> for ZEA, 46.6 and 0.6 mmol kg<sup>−1</sup> for OTA, and 28.9 and 0.1 mmol kg<sup>−1</sup> for FB<sub>1</sub>, respectively. Interestingly, ATDP reduced the bioaccessibility of these mycotoxins after gastrointestinal digestion using an in vitro<i>,</i> validated, static model. The ATDP showed a more porous structure, with a larger surface area and a surface charge modification. These structural changes following acid treatment may explain the higher efficacy of ATDP in adsorbing mycotoxins. Hence, ATDP can be considered as a promising waste material for mycotoxin biosorption.
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