Papers by Yovanna Di Lena
Pump and treat (P&T) is a technology that has been extensively used to remove and/or contain cont... more Pump and treat (P&T) is a technology that has been extensively used to remove and/or contain contaminated groundwater. Hydraulic containment of contaminants is accomplished by generating capture zones through pumping of groundwater. An appropriate delineation of capture zones is necessary to design an effective P&T system.
General Method for Predicting Capture Zone Widths for PV-Powered Pump-and-Treat Systems Using PVWATTS and Basic Hydrogeologic Data
Journal of Environmental Engineering, 2015
Pump and treat (P&T) is one of the most commonly used technologies to remove and/or conta... more Pump and treat (P&T) is one of the most commonly used technologies to remove and/or contain contaminated groundwater. An appropriate delineation of capture zones is necessary to design an effective P&T system. The study presented in this paper focuses on developing a feasibility level methodology to estimate capture zone widths for photovoltaic (PV)-powered P&T systems without energy storage throughout the continental United States as a function of daily average solar insolation data, transmissivity, and hydraulic gradient. Maps depicting predicted capture zone widths for specified transmissivity values and a hydraulic gradient are developed. The applicability of the developed methodology is illustrated with two actual sites where groundwater remediation has taken place. The methodology presented in this study can be used to assess the feasibility of PV-powered P&T systems without energy storage, in terms of capture zone width, anywhere within the continental United States. Detailed capture zone analysis should be performed during system design.
Effects of Chlorination on Silver-Coated Ceramic Pot Filters (CPFs)
World Environmental and Water Resources Congress 2013, 2013
Effectiveness of Capture Zones Generated by Intermittent Pumping of a PV-Powered Pump-and-Treat System Without Energy Storage
Remediation Journal, 2013
A common technology to remediate and/or contain contaminated groundwater is pump-and-treat remedi... more A common technology to remediate and/or contain contaminated groundwater is pump-and-treat remediation (P&T). Traditionally, P&T systems have been designed to operate continuously to achieve steady-state capture zones, for which large amounts of energy are required. Green and sustainable remediation (GSR) is emerging as a viable method to minimize the adverse effects of re-mediation on the environment. One of the challenges associated with photovoltaic-(PV-) powered P&T systems is the assessment of their performance given the intermittent nature of the power availability. This article characterizes the hydraulic containment effectiveness of a PV-powered P&T system without energy storage using data collected at two different remediation sites, a Dry-Cleaning Environmental Response Trust Fund site in Rolla, Missouri, and the Former Nebraska Ordnance Plant near Mead, Nebraska. Additionally, a method to estimate the effectiveness of the hydraulic containment as a function of the total volume of groundwater expected to be extracted is being proposed. Two transient and a continuously pumped capture zones were modeled using Visual MODFLOW ® 2012.1 along with MODPATH and compared. The study shows that smaller capture zones will be generated from intermittent pumping when compared to continuous pumping.
Pump and treat (P&T) is a technology that has been extensively used to remove and/or contain cont... more Pump and treat (P&T) is a technology that has been extensively used to remove and/or contain contaminated groundwater. P&T systems conventionally operate continuously, which requires significant amounts of energy. The use of renewable energies to meet power demands of remedial systems may reduce a project's carbon dioxide emissions. This paper analyzes the performance of a hypothetical photovoltaic (PV)–powered P&T system that operates both intermittently by assuming that the system does not include an energy storage component and continuously by assuming that the system includes a relatively small capacity energy storage component using widely available Typical Meteorological Year 3 (TMY3) data. The results are compared against a baseline case of continuous pumping at a constant rate using volume of groundwater removed and capture zone width. The comparison shows that the cost-benefit of increasing the capture zone widths and volume of extracted groundwater by increasing the rated flow rate is greater than by including a relatively small-capacity energy storage component. PV-powered P&T system performance, without or with limited relatively small-capacity energy storage, is conditioned to site-specific hydrologic and seasonal characteristics. The methodology presented in this paper can be used to assess and compare the performance of each alternative.
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Papers by Yovanna Di Lena