Analytical model for the design of permeable reactive barriers considering solute transport in a dual-domain system

Xie, Haijian, Yu, Mengzhen, Yan, Huaxiang, Thomas, Hywel Rhys ORCID: https://orcid.org/0000-0002-3951-0409, Chen, Yunmin and Chen, Yun 2023. Analytical model for the design of permeable reactive barriers considering solute transport in a dual-domain system. Journal of Environmental Engineering 149 (9) , 7159. 10.1061/JOEEDU.EEENG-7159

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Abstract

A permeable reactive barrier (PRB) is an effective groundwater in situ remediation technology, and the design methods used for PRBs are significant in ensuring that they meet remediation goals. Steady-state analytical solutions are an effective tool to provide conservative and simple design methods. A steady-state analytical solution is proposed to describe organic contaminant transport through the PRB and aquifer in a PRB and cut-off wall system. The proposed analytical solution may serve as an effective tool to provide conservative and simple design methods. The shape factor (S ) is introduced at the PRB-aquifer interface to investigate the effects of a PRB’s layout forms on its performance. The results show that the relative contaminant concentration at the point of compliance for a PRB with S=8 is 11 orders of magnitude larger than that without considering the shape factor. Effects of degradation, dispersion, and advection on PRB design are subjected to dimensionless analysis. Dimensionless analysis shows that degradation plays a key role in decreasing contaminant concentration in the PRB. In addition, increasing advection may promote contaminant transport from the source to the aquifer. Simplified solutions to estimate PRB thickness and source remediation time are derived for the practical design and performance evaluation of the PRB system.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	American Society of Civil Engineers
ISSN:	0733-9372
Date of Acceptance:	11 April 2023
Last Modified:	11 Jul 2023 14:15
URI:	https://orca.cardiff.ac.uk/id/eprint/160908

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