ABSTRACT Both Doxycycline hyclate (DOXH) and Florfenicol (FF), which are commonly utilized in veterinary and human medicine, have become known as aquatic pollutants because of their continued persistence in aquatic environments. Purslane biomass was used to create activated carbon (AC) in this study, which was then characterized using FTIR, BET, TGA, SEM, and EDX. The resulting AC showed a pore volume of 0.397 cm 3 /g and a surface area of 226.62 m 2 /g. Adsorption capability was thoroughly evaluated in relation to a number of operational parameters, such as contact time, absorbent dose, solution pH, temperature, and initially antibiotics concentration. Equilibrium was established within 60 min for both drugs, with optimal performance observed at pH 6.0 using 0.02 g of adsorbent. Equilibrium data were analyzed using nonlinear isotherm models, where the Langmuir model provided the best fit, indicating monolayer adsorption on a homogeneous surface. The maximum monolayer adsorption capacities (qmax) predicted by the Langmuir model were 92.27 mg g − 1 for DOXH and 91.08 mg g − 1 for FF, representing the theoretical adsorption capacity of the adsorbent and not being dependent on a single initial concentration. The pseudo‐second‐order (PSO) model best captured the process, according to kinetic assessment, suggesting that chemisorption controlled the adsorption mechanism.
Bnar Mahmoud İbrahim (Wed,) studied this question.