Removal of Carbamazepine, Naproxen, and Trimethoprim from Water by Amberlite XAD‐7: A Kinetic Study

Abstract

The adsorption kinetics of carbamazepine, naproxen, and trimethoprim in aqueous solution by Amberlite™ XAD‐7 has been studied. The influence of adsorbent dose (1–3 g/L), stirring rate (80–240 rpm), pH (2–9), temperature (20–60°C), and initial concentration (25–75 ppm) on the adsorption kinetics has been analyzed. The removal efficiency in the first 2 h reaches 85% for carbamazepine, 60% for naproxen, and 70% for trimethoprim. pH appears to be the most important factor conditioning the removal of these latter solutes, whereas carbamazepine adsorption seems to be independent of the pH of the adsorptive solution. Initial concentration and operation temperature moderately influence the adsorption process. Finally, stirring rate scarcely affects the process. The experimental data have been fitted to four kinetic models, namely pseudo‐first and pseudo‐second order, intra‐particle diffusion and Bangham's. The model providing the best fit is the pseudo‐second order one. Again, pH is the factor that affects the adsorption rate in a more remarkable manner although other parameters such as temperature and stirring rate also contribute to accelerate the removal of the solutes. Under the optimal operation conditions, Amberlite™ XAD‐7 exhibits a promising ability for the removal of the pharmaceuticals under study.

Isolation of naproxen from wastewater using carbon-based magnetic adsorbents

“…The adsorption efficiency decreased with the increasing pH. Domínguez-Vargas et al (2013) reported the same relation between the pH of naproxen solution and adsorption uptake. This behavior can be explained using the terms of pK a of naproxen and pH zpc of adsorbents.…”

“…Attia et al (2013) used zeolite-coated magnetic nanoparticles for removal of pharmaceutical compounds. Domínguez-Vargas et al (2013) adsorbed carbamazepine, naproxen, and trimethoprim on Amberlite XAD-7. Lü et al (2012) used three different activated carbons for removal of trace naproxen from water.…”

Adsorption of fexofenadine and diphenhydramine on dehydrated and activated carbons from date palm leaflets

“…[17] Amberlite was tested for the removal of Carbamazepine, Naproxen and Trimethoprim. [18] D001 resin was examined for the removal of miglitol anti-diabetic drug. [19] In this paper, dehydrated carbons, an emerging carbonaceous material that possesses low surface area will be compared with activated carbon for the adsorption of FEX and DPH.…”

Rapid and Efficient Removal of Carbamazepine from Water by UiO-67

“…3 It is a persistent organic compound in the environment 3 and toxic to the aquatic system. [4][5][6][7] It is resistant to biodegradation and barely removed during conventional and biological wastewater treatments. [8][9][10] Advanced treatment technologies studied for carbamazepine removal from aqueous solution include ozonation [11][12] , ultrafiltration 9 , oxidation 13 and photo catalytic degradation 14 .…”