Adsorption Study and Removal of Basic Fuchsin Dye from Medical Laboratory Wastewater Using Local Natural Clay

Local natural clay from Sulaimani zone-Takiya (TKC), Kurdistan Region of Iraq, was characterized and used for the removal basic fuchsin (BF) dye laboratory bacterial wastewater. The characterization adsorbent carried out with XRD, XRF, FT-IR. sample dominated by vermiculite. Adsorption tests under different conditions contact time, pH solution, temperature, initial concentration, amount were performed to analyze effect various experimental parameters. Equilibrium time reached within 180 minutes, maximum BF adsorption achieved at 6.8 a temperature ranging 20 50°C. data fitted pseudo-second-order kinetic model, activation energy 22.68 kJ·mol-1. isotherms could be well-fitted Langmuir isotherm model. thermodynamic parameters such as Δ G ° , id="M2"> H id="M3"> S determined, negative values id="M4"> indicated that spontaneous all temperatures. Furthermore, id="M5"> an endothermic reaction. Wastewater contaminated collected (BF concentration: 160 mg·L-1) treated TKC. resulting concentration after 4.76 mg·L-1. adsorbed is about 149.2 mg/g or 0.44 mmol/g, which close range cation exchange capacity (CEC) value vermiculite dominant mechanism.