February 4, 2022

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Dimin Fan to Present on Quantifying the Abiotic Degradation of Chlorinated Solvents in Groundwater at SERDP & ESTCP Webinar Series

Dimin Fan, Ph.D. (California) will present "Field Deployable Oxidation-Reduction Potential Kits for Quantitative Assessment of Abiotic Monitored Natural Attenuation Rates" at Strategic Environmental Research and Development Program (SERDP) & Environmental Security Technology Certification Program (ESTCP) Webinar: Quantifying Abiotic Transformation Rates and Mechanisms for Chlorinated Ethenes in Subsurface Environments, at 12 PM EST on February 10, 2022.

Dimin's co-presenter for the webinar is David Freedman, Ph.D., Clemson University.

Dimin Fan is an environmental scientist with more than 10 years of experience, focused on research and development, evaluation, and application of innovative technologies and solutions for soil and groundwater remediation across academia, regulatory agencies, and the private sector. His technical expertise includes fundamental biogeochemical processes for contaminant transformation in subsurface and in situ groundwater remediation technologies, such as in situ chemical reduction (ISCR), in situ activated carbon-based technology, and other forms of combined remedial technologies. Dimin's areas of research focus on developing and characterizing abiotic iron-based remediation technologies for active and passive management of contaminant plumes and the use of carbonaceous materials for the in situ remediation of organic contaminants. Dimin has served as the principal investigator or key performer for several research projects on quantitative characterizations of abiotic natural attenuation processes mediated by reactive iron minerals. He has authored more than 20 peer-reviewed research papers, including several recent ones on novel tools to characterize abiotic natural attenuation process. He earned a bachelor's degree in environmental chemistry from Nanjing University in China, a master's degree in soil physics from University of Delaware, and a doctoral degree in environmental science and engineering from Oregon Health and Science University.

SERDP and ESTCP are the United States Department of Defense's (DoD) environmental research programs, harnessing the latest science and technology to improve DoD's environmental performance, reduce costs, and enhance and sustain mission capabilities. The Programs respond to environmental technology requirements that are common to all of the military Services, complementing the Services' research programs. SERDP and ESTCP promote partnerships and collaboration among academia, industry, the military Services, and other Federal agencies. They are independent programs managed from a joint office to coordinate the full spectrum of efforts, from basic and applied research to field demonstration and validation.

The overarching goal of the webinar series is to promote the transfer of innovative, cost-effective, and sustainable solutions developed by SERDP and ESTCP. The series targets end users, including practitioners, the regulatory community, and researchers with the objective of providing cutting-edge and practical information from sponsored research and technology demonstrations in an easily accessible format and at no cost.

Webinar Description

The SERDP and ESTCP webinar will feature DoD-funded research efforts to understand and quantify the abiotic degradation of chlorinated solvents in groundwater. David Freeman will discuss the development of a laboratory protocol using a carbon-14 (14C) assay to quantify the degradation rate constants of chlorinated solvents based on accumulation of 14C-labeled daughter products. Dimin Fan will talk about the development of a field kit capable of measuring the oxidation-reduction potential of aquifer sediments in situ.


"Field Deployable Oxidation-Reduction Potential Kits for Quantitative Assessment of Abiotic Monitored Natural Attenuation Rates" by Dimin Fan (SERDP Project ER20-1374)

This research project supports SERDP's effort to improve quantitative understanding of naturally occurring long-term abiotic contaminant transformation processes to better assist DoD with assessing the transition of contaminated sites from active remediation to passive management. Given the challenges to measure slow abiotic attenuation rates by conventional means, the project aims to develop an alternative approach that uses the oxidation-reduction potential (ORP) of reactive solids to estimate the potential for contaminant transformation. Traditional ORP measurement cannot accurately measure the ORP of reactive solids because of poor communication between solid and electrode. This research evaluated the feasibility of adding electron shuttles during ORP measurement to improve the electrochemical response of electrode to reactive solids and further correlated the improved ORP values with abiotic contaminant transformation rates. This presentation describes the development of an improved ORP measurement approach that has evolved from a simple model system to a more complex field-like conditions with the goal to develop a working kit and protocol that can be reliably used to measure ORP of redox active solids collected from the field.

More Information

About the SERDP & ESTCP Webinar: 02-10-2022 (serdp-estcp.org)
About SERDP/ESTCP: Strategic Environmental Research and Development Program, Environmental Security Technology Certification Program (serdp-estcp.org)
For consultation regarding chlorinated solvents in groundwater and Monitored Natural Attention, contact Dimin Fan at This email address is being protected from spambots. You need JavaScript enabled to view it.
Learn more about Dimin: Dimin Fan | LinkedIn