PCPC Microplastic Environmental Explorer Tool Webinar

Date : 
Tuesday, July 18, 2017 12:30PM ET
Location: 
Your Office

PCPC Microplastic Environmental Explorer Tool....A Framework for Dynamic Estimation of Aquatic Environmental Concentrations of Microplastics via WWTP Discharge

Down-the-drain exposure models provide a valuable screening-level tool for estimating environmental exposure to substances which are treated and discharged at municipal wastewater treatment plants (WWTPs). Microplastics (MPs) enter WWTPs from a variety of sources. As such, exposure models traditionally used for chemicals may also be utilized for particle emissions into the environment from WWTP discharge. These models often account for removal in WWTP as well as in-river decay processes. 

However, in light of incomplete and changing knowledge on MP fate in surface waters, we developed a framework in which MP use rates and general properties are used to estimate the range of expected environmental concentrations depending on assumptions about WWTP and in-stream removal. We will demonstrate a new PCPC web-based tool which incorporates a range of  WWTP and in-stream removal rates.  Each model run produces a distribution of Predicted Environmental Concentration (PECs) representing each effluent impacted stream as described by the iSTREEM® model which estimates spatially-explicit concentrations of chemicals in effluent and receiving waters across the US. Examples of output visualization using this interactive tool includes a broad view of all possible combinations in a matrix format, and a detailed view of the full distribution of PECs for individual model runs. 

This dynamic framework can be used to help inform environmental exposure assessments by readily providing PECs based on varying model inputs on WWTP and in-stream removal rates for microplastics.

The state of the science related to MPs in regards to removal are still evolving as new work is being performed and published. Therefore, we developed a framework in which MP use rates and general properties can be used to estimate the range of expected environmental concentrations depending on assumptions about WWTP and in-stream removal.  

Click Here to Register for this Informative Webinar

About our Speaker

Christopher M. Holmes has over twenty years' experience related to the understanding of sources, transport and fate of pollutants in the environment, their potential effects, and how to best manage human activities with ecological protection. Mr. Holmes has managed numerous environmental characterization studies for the crop protection, home & personal care, veterinary medicines, and general chemical industries in both domestic and international settings. He has worked on the integration of GIS and remote sensing technologies into existing environmental models for risk assessment. He actively participates in the advancement of ecological risk assessment methodologies via conference presentations, publications, workshops, and meetings with regulatory agencies. He continues to be involved in the evolution of the ecological risk assessment process for threatened and endangered species in the US. His role at Waterborne also includes activities in marketing and business development to promote the application of Waterborne expertise to other markets and geographies.