Parameterization and prediction of nanoparticle transport in porous media : a reanalysis using artificial neural network

BABAKHANI, Peyman, BRIDGE, Jonathan, DOONG, Ruey-an and PHENRAT, Tanapon (2017). Parameterization and prediction of nanoparticle transport in porous media : a reanalysis using artificial neural network. Water Resources Research, 53 (6), 4564-4585.

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The continuing rapid expansion of industrial and consumer processes based on nanoparticles (NP) necessitates a robust model for delineating their fate and transport in groundwater. An ability to reliably specify the full parameter set for prediction of NP transport using continuum models is crucial. In this paper we report the reanalysis of a data set of 493 published column experiment outcomes together with their continuum modeling results. Experimental properties were parameterized into 20 factors which are commonly available. They were then used to predict five key continuum model parameters as well as the effluent concentration via artificial neural network (ANN)-based correlations. The Partial Derivatives (PaD) technique and Monte Carlo method were used for the analysis of sensitivities and model-produced uncertainties, respectively. The outcomes shed light on several controversial relationships between the parameters, e.g., it was revealed that the trend of math formula with average pore water velocity was positive. The resulting correlations, despite being developed based on a “black-box” technique (ANN), were able to explain the effects of theoretical parameters such as critical deposition concentration (CDC), even though these parameters were not explicitly considered in the model. Porous media heterogeneity was considered as a parameter for the first time and showed sensitivities higher than those of dispersivity. The model performance was validated well against subsets of the experimental data and was compared with current models. The robustness of the correlation matrices was not completely satisfactory, since they failed to predict the experimental breakthrough curves (BTCs) at extreme values of ionic strengths.

Item Type: Article
Departments - Does NOT include content added after October 2018: Faculty of Social Sciences and Humanities > Department of Natural and Build Environment
Identification Number:
Page Range: 4564-4585
Depositing User: Jonathan Bridge
Date Deposited: 07 Jun 2017 11:10
Last Modified: 18 Mar 2021 01:02

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