RT Journal Article
T1 On-site regeneration by ultrasound activated persulfate of iron-rich Antipyrine-loaded biochar
A1 Ouiriemmi , Imen
A1 Escudero Curiel, Silvia
A1 Pazos Currás, Marta María
A1 Sanromán Braga, María Ángeles
K1 3303.01 Tecnología de la Catálisis
AB Adsorption process has proven its efficiency in the abatement of pharmaceuticals in liquid media, even if large volumes of wastewater need to be treated. Nevertheless, exhausted adsorbent regeneration is economically and environmentally necessary. For this reason, recent studies are aimed at finding new methods of regeneration. In this study, an on-site adsorption-regeneration method was assessed. Initially, a model pharmaceutical, Antipyrine (Apy), has been adsorbed onto a low-cost biochar. Apy adsorption followed a pseudo-second order kinetic and a Langmuir isotherm. In a second step, spent biochar was regenerated by oxidation using SO4- . To do this, SO4-  was generated by activation of persulfate by ultrasound and assisted by the iron inherently into the biochar. To facilitate the availability of this iron, the addition of an enhancing agent such as oxalic acid was evaluated. The regenerated biochar proved its stability and reusability achieving an uptake percentage of around 87% after the third adsorption-regeneration cycle. Therefore, this on-site regeneration method could be promising for treating other kinds of adsorbents and resolving the pollution problems caused by the non-controlled throw of the exhausted adsorbents.
PB Journal of Environmental Chemical Engineering
SN 22133437
YR 2022
FD 2022-10
LK http://hdl.handle.net/11093/3825
UL http://hdl.handle.net/11093/3825
LA eng
NO Journal of Environmental Chemical Engineering, 10(5): 108400 (2022)
NO Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG
NO Agencia Estatal de Investigación | Ref. PID2020-113667GB-I00
DS Investigo
RD 02-dic-2024