Adsorption Kinetics and Equilibrium Studies of Reactive Red ۱۹۸ Dye by Cuttlefish Bone Powder

In this research, the removal of Reactive Red ۱۹۸ dye (RR-۱۹۸) by Cuttlefish bone powder was investigated. The adsorbent was prepared in laboratory conditions and ground by ASTM standard sieves (۶۰-۱۰۰ mesh). The progress of the process is monitored spectrophotometrically by measuring the absorbance of dye at ۵۱۸ nm wavelength. In addition, the effects of process parameters such as adsorbent dose, pH, initial dye concentration, and contact time have been investigated. The SEM micrographs and the XRD pattern showed that the cuttlefish bone has the clearly seen pores on its surface and a crystallized form. According to the results, by increasing adsorbent dose and retention time, dye removal efficiency was increased considerably.The adsorption isotherm for initial dye concentration (۵۰ mg/L) was in good concordance with the Langmuir and Freundlich models. The adsorption kinetic studies revealed that the adsorption of RR۱۹۸ dye complied with pseudo-second-order kinetic.

کلیدواژه ها:

Cuttlefish bone ، Reactive red ۱۹۸ dye ، Adsorption kinetic and isotherm