Removal of lead from aqueous solution using chemically modified green algae as biosorbent: optimization and kinetics study

The present research aims to elucidate the effect of lactic acid concentration on the extractability and physicochemical properties of cobia (Rachycentron canadum) skincollagen. The cobia skin acid-soluble collagen (ASC) was isolated using different con- centrations of lactic acid (0.5 M and 1.0 M) and characterized on its extractability and physicochemical properties. The extract using 0.5 M lactic acid gives a higher
yield compared to using 1.0 M lactic acid. The moisture, protein, fat, and ash con-tent of cobia skin ASC extracted using 0.5 M was higher than extracted using1.0 M lactic acid. The functional group present in both extracts was amide A, amide I, and
amide III. Both extracts at different lactic acid concentrations showed decreasing on relative viscosity with temperature increased. Thus, different extractability and physicochemical properties of cobia skin ASC extracts exhibits based on the lactic
acid concentration and it would produce collagen with multi potential application.