 The adsorption of CD2 and PB2 by Squid Melanin was investigated, with a biosorption efficiency of 95% at a metal ion concentration of 2 mm per liter. The maximum content of bound CD2 and PB2 was 0.93 mm per G and 0.65 mm per G, respectively. Temperature had no effect on the adsorption, while pH range of 4.0 to 7.0 showed high and stable adsorption yield. Macrosalts such as NaCl, MgCl2, and CaCl2 diminished the adsorption of CD2, but not PB2, indicating different functional groups in Squid Melanin are responsible for their adsorption. IR analysis revealed possible functional groups responsible for metal binding were phenolic hydroxyl, OH, carboxyl, COOH, and amine groups, NH. This study reports a new material for the removal of heavy metals from low-strength wastewater. This article was authored by Shugwa Chen, Chang Huxue, Jing Feng Wang, and others. We are article.tv, links in the description below.