Yiding Zhang (California) coauthored “An Iterative Method of Modeling Pump-Treat-Inject System with ‘Partial Treatment’” in the journal, Groundwater. The article presents an innovative approach to simulating the injection concentration of chemicals in a pump-treat-inject system, during ‘partial treatment’ scenarios.

Yiding’s coauthors were Jim Zhang (AECOM), Franklin W. Schwartz (the Ohio State University), and Massoud Karimi (Geoenviroshearch).

Yiding Zhang is a Senior Staff Professional who focuses on hydrogeology, water resources, numerical and analytical modeling, data visualization, and data analysis often with machine learning and data mining approaches. He supports geologic and hydrogeologic modeling projects using Earth Volumetric Studio (EVS), MODFLOW, GMS, Python, and machine learning tools.

Groundwater is the leading international journal focused exclusively on groundwater. Founded in 1963, it publishes papers on groundwater flow and well hydraulics, hydrogeochemistry and contaminant hydrogeology, applications of geophysics, groundwater management and policy, and the history of groundwater hydrology.

Abstract

Pump-and-treat technologies are widely used in groundwater remediation and site cleanup. Such technologies involve pumping contaminated groundwater to the surface for treatment. Following treatment, the water is often reinjected into the aquifer (referred to as pump-treat-inject, or PTI) for potential reuse. The treatment system is often designed to remove dissolved-phase contaminants in groundwater such that water meets applicable cleanup standards (full treatment). However, in some cases, the treatment system may not effectively reduce the dissolved-phase concentrations (partial treatment) for some of the contaminants present in groundwater. Modeling PTI under partial treatment conditions is challenging because contaminant concentrations in injected water depend on the pumped water concentrations and the system treatment efficiency. Essentially, the injected water concentration (a transport model input) is unknown prior to transport simulation. This study presents a novel iterative approach to modeling PTI under partial treatment scenarios, where the injected water concentration is linked to the modeled pumped water concentration. The method was developed for a complicated three-dimensional (3D) flow-and-transport modeling study conducted for a confidential remediation site where PTI with partial treatment was applied. However, due to the complexity of the 3D model and the confidential information of the site, a simple two-dimensional (2D) numerical model is presented to demonstrate the iterative method. The 2D model test runs and the 3D model application in a remediation site showed that the iterative simulation results quickly converged to a viable final solution.

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About the article: “An Iterative Method of Modeling Pump-Treat-Inject System with ‘Partial Treatment’”

About Publication: Groundwater
For consultation regarding groundwater remediation and site cleanup with Pump-and-Treat technology, contact Yiding Zang at YZhang@Geosyntec.com
Learn more about Yiding: Yiding Zhang | LinkedIn