<p>The massive influx of <i>Sargassum</i> spp<i>.</i> to the Mexican Caribbean coasts poses significant environmental, economic, and health challenges. This study explores the potential use of <i>Sargassum</i> spp<i>.</i> as a biosorbent material for contaminant removal. Some of the pollutants found in water bodies in some coastal areas are those derived from soaps and detergents, such as sulfates and phosphates. Therefore, the biosorbent capacity of <i>Sargassum</i> spp<i>.</i> to remove this type of substance dissolved in water was studied. The removal efficiency, for both pollutants, was greater than 90% when a concentration of 900&#xa0;mg*L⁻¹ was used. The capacity of <i>Sargassum</i> spp<i>.</i> to be used in several cycles was demonstrated, maintaining its biosorbent capacity. The structural changes in <i>Sargassum</i> spp<i>.</i> after biosorption were characterized by scanning electron microscopy, demonstrating the presence of sulfates and phosphates on <i>Sargassum</i> spp. Therefore, this work proposes an efficient, economic, and sustainable removal system based on <i>Sargassum</i> spp.</p> Graphical abstract <p>Schematic representation of contaminant removal using Sargassum spp.</p>