EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Experimental study of a circular economy system for the oxidation treatment of organochlorine compounds 

Chiara Cappelli, Mònica Rosell, Clara Torrentó, María Usieto, and Albert Soler Gil
Chiara Cappelli et al.
  • Grup MAiMA, SGR Mineralogia Aplicada, Geoquímica i Geomicrobiologia, Departament de Mineralogia, Petrologia i Geologia Aplicada, Facultat de Ciències de la Terra, Institut de Recerca de l'Aigua (IdRA), Universitat de Barcelona (UB), Martí Franquès s/n, 08

The acknowledgment of the serious hazard caused by the massive use of pesticides and other industrial and commercial products containing organochlorine compounds has prompted the search of the best strategy for the remediation of aquatic and terrestrial environments. Organochlorine compounds are persistent contaminants present in soils and water that easily bio-accumulate and bio-magnify becoming a threat for human health1.  The in situ chemical oxidation (ISCO) has proven to be an effective method for the decontamination of chlorinated solvents2. The ISCO implementation needs specific oxidant-activation conditions that are often difficult to maintain. In a previous study, inert urban waste (concrete residue) was used in a pilot system of circular economy to induce alkaline conditions in interception trenches installed in the unsaturated zone of a contaminated bedrock aquifer3. In the present study, a scaled down set-up was used to produce preliminary data on the solid reactivity and solution changes upon the application of an oxidant, persulfate, which requires alkaline activation. Flow-through columns were filled with grinded concrete waste that was allowed to react with water extracted from the trenches and enriched with persulfate. The results set the basis for the correct in situ application of the planned remediation method.  

1. Islam, M. A.; Amin, S. M. N.; Rahman, M. A.; Juraimi, A. S.; Uddin, M. K.; Brown, C. L.; Arshad, A. Environmental Nanotechnology, Monitoring & Management 2022, 18, 100740.

2. Krembs, F. J.; Siegrist, R. L.; Crimi, M. L.; Furrer, R. F.; Petri, B. G. Groundwater Monitoring & Remediation 2010, 30, (4), 42-53.

3. Torrentó, C.; Audí-Miró, C.; Bordeleau, G.; Marchesi, M.; Rosell, M.; Otero, N.; Soler, A. Environmental Science & Technology 2014, 48, (3), 1869-1877.

How to cite: Cappelli, C., Rosell, M., Torrentó, C., Usieto, M., and Soler Gil, A.: Experimental study of a circular economy system for the oxidation treatment of organochlorine compounds , EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-1864,, 2023.