This study focuses on the ability of commercial natural bath sponges, which are made from skeletons marine to sorb Hg waters. The main component these sponges is spongin, a protein-based material, closely related collagen, offering plenitude reactive sites great variety amino acids in protein chains, where ions can sorb. For dose 40 mg L−1 and initial concentration 50 μg Hg(II), spongin (MS) re...