Exploring the reusability of cuttlefish bones in sustainable waste management by green synthesis method for methylene blue dye removal.

The use of solid wastes as an adsorbent for dye removal from wastewater is one of the leading steps of sustainable waste management. In this research, the removal of Methylene Blue dye by cuttlefish bone waste was examined by using peppermint extract. Zn-doped cuttlefish bone was prepared by the green synthesis method in laboratory conditions for the comparison of cuttlefish bone in adsorption and ultrasonically-assisted adsorption processes. The results of this study exhibited that Methylene Blue removal with Zn-doped cuttlefish bone was higher than that with cuttlefish bone at all pH values. The qmax values obtained from the Langmuir isotherm model were calculated as 8.96 mg/g and 12.74 mg/g in the adsorption process with cuttlefish bone and Zn-doped cuttlefish bone, respectively. The qmax value relatively improved to 18.05 mg/g in the ultrasonically-assisted adsorption with Zn-doped cuttlefish bone. With the green synthesis, the qmax increased by 1.42 times, while this increase was 2.01 times with the application of the ultrasonically-assisted adsorption process using Zn-doped cuttlefish bone compared to the adsorption process using cuttlefish bone. [ABSTRACT FROM AUTHOR]