Effect of acid and alkaline treatment on the adsorption capacity of cuttlefish bone

As a center of textile industry in Indonesia, city Pekalongan faces environmental issue due to wastewater effluent from industry. The contains dye, mostly synthetic used for coloring the fabrics. One dyes commonly is sulphur blue producing dark color. simple methods reduce dye adsorption. Cuttlefish bone was as adsorbent. It abundantly available and cheap because it waste fishing effect acid alkaline treatment cuttlefish on its adsorption capacity toward investigated. treatments were conducted using hydrochloric sodium solutions, respectively. concentrations both solutions varied (0.0 N, 0.25 0.5 0.75 1.0 N). concentration affect bone. treated with N solution able 217.67 87.67 Pt-Co, while that 0.25N hydroxide lowers 74.33 Pt-Co. alkaline-treated showed higher than acid-treated