The present invention relates to the use of a supramolecular system in order to remove particles from a liquid medium containing same. According to the invention, the supramolecular system includes at least one molecule having a low molecular weight and/or an organic compound from living organisms, preferably from jellyfish, said compound being selected from among collagen, a polysaccharide, a proteoglycan or a mixture of two of said organic compounds, and said molecule having a low molecular weight and formula (I) as defined herein. The invention also relates to a method for removing particles from a liquid medium containing same. The invention is particularly suitable for use in water decontamination and biotechnology.