A permeable reactive barrier is an in situ below-ground treatment zone of reactive permeable material that degrades (PRB) or immobilizes by adsorption (PAB) contaminants carried by groundwater flowing through. This work shows how a PAB made of Aquacarb 207EATM (activated carbon produced by the Sutcliffe Carbon) is capable to capture dissolved Cr(VI) ions leaching from contaminated top soil during rainfall events. The removal of chrome ions from aqueous solutions by adsorption onto the Aquacarb 207EATM activated carbon has been studied showing how the adsorption capacity changes as a function of different operational conditions. The effectiveness a PAB for the protection of a shallow aquifer has been tested by means of numerical simulation of dissolved Cr(VI) transport and adsorption with a two dimensional example of a permeable adsorbing barrier (PAB) made of granular activated carbon, designed for the protection of a shallow aquifer from Cr(VI) leaching from the topsoil during rainfall infiltration. The use of mathematical models for the design of a PAB is always necessary, since either the choice of adsorbing material or the definition of optimal barrier geometry depend on hydraulic and chemical characteristics of the contaminated groundwater flow to be treated. The values of the parameters chosen for the numerical simulation of the case studied are reported in Table 1 Figure 1 shows the plots of groundwater Cr(VI) concentration with and without the barrier at various stages after the infiltration. The PAB ensures a complete protection from pollution of the aquifer downstream the barrier, the outgoing groundwater concentration being always below directive 2000/60/CE prescriptions.
Groundwater remediation by means of permeable adsorbing barriers / DI NATALE, Francesco; M., Di Natale; R., Greco; D., Karatza; Lancia, Amedeo; D., Musmarra. - STAMPA. - (2006), pp. 623-624. (Intervento presentato al convegno First mediterranean Congress chemical Engineering for Environment, tenutosi a Venice, nel 4-6- October 2006).
Groundwater remediation by means of permeable adsorbing barriers
DI NATALE, Francesco;LANCIA, AMEDEO;
2006
Abstract
A permeable reactive barrier is an in situ below-ground treatment zone of reactive permeable material that degrades (PRB) or immobilizes by adsorption (PAB) contaminants carried by groundwater flowing through. This work shows how a PAB made of Aquacarb 207EATM (activated carbon produced by the Sutcliffe Carbon) is capable to capture dissolved Cr(VI) ions leaching from contaminated top soil during rainfall events. The removal of chrome ions from aqueous solutions by adsorption onto the Aquacarb 207EATM activated carbon has been studied showing how the adsorption capacity changes as a function of different operational conditions. The effectiveness a PAB for the protection of a shallow aquifer has been tested by means of numerical simulation of dissolved Cr(VI) transport and adsorption with a two dimensional example of a permeable adsorbing barrier (PAB) made of granular activated carbon, designed for the protection of a shallow aquifer from Cr(VI) leaching from the topsoil during rainfall infiltration. The use of mathematical models for the design of a PAB is always necessary, since either the choice of adsorbing material or the definition of optimal barrier geometry depend on hydraulic and chemical characteristics of the contaminated groundwater flow to be treated. The values of the parameters chosen for the numerical simulation of the case studied are reported in Table 1 Figure 1 shows the plots of groundwater Cr(VI) concentration with and without the barrier at various stages after the infiltration. The PAB ensures a complete protection from pollution of the aquifer downstream the barrier, the outgoing groundwater concentration being always below directive 2000/60/CE prescriptions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
