Browsing by Author "Mosteo Abad, Rosa"

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Comparative adsorption of ciprofloxacin on sugarcane bagasse from Ecuador and on commercial powdered activated carbon
(2021) Peñafiel Tenorio, María Eulalia; Matesanz, José María; Vanegas Peña, María Eulalia; Bermejo Zari, Daniel Leonardo; Mosteo Abad, Rosa; Ormad, María P.
This work examined the adsorption capacity of sugarcane bagasse (SB) for the removal of ciprofloxacin (CPX) from water using batch experiments and a fixed bed column and compared its adsorption performance with a powdered activated commercial carbon (PAC). Both adsorbents achieved a similar percentage removal of about 78% with doses of 3 g L−1 of SB and 0.3 g L−1 of PAC (20 mg L−1 initial CPX concentration at 30 °C). The maximum removal was obtained at a pH between 6 and 8. SB adsorption isotherms were fitted to the Langmuir, BET and Freundlich models showing a maximum adsorption capacity of 13.6 mg g−1. The kinetic data for both SB and PAC fitted the pseudo second-order model (R2 = 0.99). The adsorption process was faster on the SB (65% of elimination in the first 5 min) than on the PAC. The study of the adsorbent properties shows that SB is a macroporous solid with a specific surface area 250 times smaller than PAC. The thermodynamic results show that SB adsorption was physical and exothermic. The main suggested interactions between CPX and SB are elec- trostatic attraction, hydrogen bonding and dipole-dipole interactions. The experiments carried out in a fixed bed show that the adsorption capacity at breakthrough increases with the bed height. The adsorption capacity at sat- uration time was 9.47 mg g−1 at a flow rate of 3 mL min−1, a bed height of 14 cm, and a diameter of 1.5 cm. The experimental data were fitted to the Bohart-Adams model (R2 = 0.98). These results highlight the capacity of sugarcane bagasse to adsorb ciprofloxacin from water, illustrating its potential as a low-cost adsorbent.
Corrigendum: “Comparative adsorption of ciprofloxacin on sugarcane bagasse from Ecuador and on commercial powdered activated carbon” (Science of the Total Environment (2021) 750, (S0048969720350270), (10.1016/j.scitotenv.2020.141498))
(2022) Matesanz Martín, José María; Bermejo Zari, Daniel Leonardo; Vanegas Peña, María Eulalia; Peñafiel Tenorio, María Eulalia; Ormad, María P.; Mosteo Abad, Rosa
The authors regret that the printed version of the above article contained a number of errors. The correct and final version follows. The authors would like to apologise for any inconvenience caused.