Removal of atenolol from aqueous solutions by multiwalled carbon nanotubes modified with ozone: kinetic and equilibrium study

Abstract

The aim of study is removal of atenolol from aqueous solutions by multiwalled carbon nanotubes modified with ozone. The design of the experiment was adopted across four levels with the L16 matrix arrangement. The factors influencing atenolol adsorption include changes in the pH value, contact time, the dose of the modified multiwall carbon nanotube, and the initial concentration of atenolol in the solution; these factors were evaluated along with the extent of their influence on removal efficiency. Data analyses were performed by the Design Expert 6 software. The results indicated that the pH, contact time, adsorbent dose, and the initial concentration were 7, 20 min, 0.15 g/L and 1 mg/L, respectively. In this state, the removal efficiency was calculated to be 75.79%. The maximum adsorption capacity was obtained as 5.05 mg/g under optimal conditions. The data were analyzed using adsorption models obtained from the isotherm fitting tool software. The results suggested that the data had a greater congruence with the Freundlich model (corrected Akaike information criterion = 2.58). Furthermore, the kinetics of the reactions followed pseudo second order kinetics (R = 0.95). Based on this study, it can be concluded that modified multiwall carbon nanotubes enjoy high potential and efficiency as adsorbents for the removal of atenolol from aqueous solutions.

Fixed bed adsorption column studies and models for removal of ibuprofen from aqueous solution by strong adsorbent Nano-clay composite

“…Table 7 indicates the value of these parameters for different modes of input concentrations of ibuprofen, bed height and flow rate. Value of A decreased by increasing initial concentration and flow rate and showed an increase by elevating bed height, but the ratio of r was in contrast [46][47][48][49][50]. R 2 in 0.9901 and 0.9980 range indicates that the model is suitable for predicting the breakthrough curve of ibuprofen uptake process as well as is simulated model of Freundlich adsorption kinetic.…”

Sensitivity Analysis with the Monte Carlo Method and Prediction of Atenolol Removal Using Modified Multiwalled Carbon Nanotubes Based on the Response Surface Method: Isotherm and Kinetics Studies

“…is suggests an increase in the number of active sites, the increased contact area, and in turn the enhanced electrostatic interaction which results in the development of removal efficiency [4]. Kończyk et al observed that with the increased MWCNT dose, due to the surface of adsorbent provided a sufficient number of binding sites for the Pb (II) ions, the adsorption efficiency increased [46].…”

“…ATN, bisoprolol, metoprolol, sotalol, and propranolol are common kinds of β-blockers [1], among which ATN is widely used for the therapy of cardiovascular disease, hypertensive disease, infantile hemangioma [2], acute myocardial infarction [3], and decline the intensity of heart attacks. Approximately 50% of the amount ingested by humans cannot be metabolized during excretion, and it is frequently detected in urban wastewater [4]. Researchers expressed conventional wastewater treatment plants (WWTPs) including ozonation and microbial transformation [5] cannot remove ATN sufficiently.…”

“…Recently, scientists use some methods for ATN removal including oxidation with UV/peroxydisulfate [8], oxidation with light [6], chlorination/UV process [9,10], and ozonation [2]. Generation of toxic by-products [5] and high energy consumption [4] are drawbacks of the last methods.…”

Swelling Behavior of Poly (Aam_ma) Hydrogel Matrix and Study Effects Ph and Ionic Strength, Enforcement in Controlled Release System

“…Several studies have shown that this drug has a low absorption in colon and intestine, so the body can get rid of it quickly, therefore, it has a short half-life, a lack of bioavailability and dumping in the concentration of doses in plasma blood level because of the undesirable effects that include the central nerves system (CNS) [13]. The previous study proved that this drug may stay in sewage at 166 d to these [14], reasons requires to develop a method that takes this drug to prolong the period in the body and achieves the highest therapeutic effectiveness. On the other hand, wastewater is treated from its pharmaceuticals compound [15].…”