degradation of toxic substances Biological Surfactants especially Surfactin good material to the adsorption of heavy metal ions and hydroxide formed chelates C-CH(CH2)-CH-CH2-CO-GLU-LEU-LEU Amino acids HEU一⊥EU-ASP surfactin ③degradation of toxic substances degradation of toxic substances Biological Surfactants especially Surfactin good Biological Surfactants especially Surfactin good material to the adsorption of heavy metal ions and material to the adsorption of heavy metal ions and hydroxide formed chelates hydroxide formed chelates Amino acids