Kinetic, equilibrium and thermodynamic studies of the adsorption of paracetamol in activated carbon in batch model and fixed-bed column

Abstract

This work studied the removal of paracetamol through the adsorption process using the granular activated carbon. The results indicated that it was possible to obtain 95% of removal under the experimental conditions of pH 6, 120 min of process and 5 g L−1 of solid adsorbent. The kinetic model that best fit the experimental data was the pseudo-first order. The isotherm model that best fit the experimental data was the Sips. The thermodynamic tests indicated that the adsorption process was favorable and spontaneous and confirmed the endothermic nature of the process. In fixed bed column adsorption, the best operating condition found was obtained using the flow rate of 3 mL min−1 and bed mass equal to 0.5 g. In this case, the system presented the highest volume of treated PAR effluent, of 810 mL per gram of carbon in the bed, besides a longer rupture time and bed saturation.

Use of low-cost adsorbent derived from the brazilian cerrado biome to remove pollutants in effluent

“…In their study of adsorption of Paracetamol with commercial activated biochar, Haro et al, (2021), obtained 95% removal for 120 min with a concentration of 5 g L -1 , a result close to that obtained in the present study. In their investigation on the potential of adsorption of the grape stalk biochar on Paracetamol (20 mg L -1 ), Villaescusa et al, (2011) obtained a removal of 30%, a percentage lower than that identified in this work when comparing the concentration of the pollutant.…”

“…The adsorbent saturates slowly, causing an increase in the saturation time. Haro et al, (2021) demonstrated the removal of Paracetamol by adsorption in activated biochar, and identified the same behavior regarding the saturation time, the higher the concentration of the pollutant, the greater the saturation time.…”

Efficient adsorptive removal of paracetamol and thiazolyl blue from polluted water onto biosynthesized copper oxide nanoparticles

“…This could be due to the stronger electrostatic interaction mechanisms involved in the uptake of the dye species in comparison to the weaker H-bonding and Van der Waals forces predominant in paracetamol adsorption. Moreover, the adsorption of paracetamol on CuONPs is higher than that obtained for other efficient adsorbents like sugar cane bagasse (0.121 mg/g) 60 , metal–organic-framework-MIL type (1.87 mg/g) 61 , activated carbon (43.5 mg/g) 62 and acid modified clay (43.92 mg/g) 20 . Similarly, the uptake of thiazolyl blue on the CuONPs was higher than 48.80 mg/g reported for American sycamore derived biochar 14 .…”

Sustainable Mitigation of Paracetamol with a Novel Dual-Functionalized Pullulan/Kaolin Hydrogel Nanocomposite from Simulated Wastewater

“…The observance of a plateau in the later phase was due to the adsorption of PCT on internal binding sites in the pores of f-PKHN, which used a relatively greater time than external active sites of f-PKHN. Various adsorbents used for PCT removal, such as innovative spherical biochar (120 min), 5 granular activated carbon (120 min), 49 and cotton cloth residue activated carbon (60 min) 50 depicted a higher contact time than the synthesized hydrogel nanocomposite (25 min) that substantiated f-PKHN as an advanced and economical adsorbent.…”