Field Demonstration of a Sonolysis Reactor for Treatment of PFAS-Contaminated Groundwater

TRRP Training: 2022 Program

presented by: GSI Environmetal Inc.

Texas Risk Reduction Program regulations (TRRP; 30 TAC 350) establish consistent risk-based protocols for assessment and response to soil, groundwater, or surface water impacts associated with environmental releases of regulated wastes or substances.

Presented by GSI Environmental Inc., this popular and informative training series is a must for professionals who need a working understanding of TRRP and those needing to stay up-to-date with the latest TCEQ TRRP guidance and policies.

TRRP Training Course (2 Days): Provides an overview of the TRRP framework and step-by-step training on property assessment and response action procedures established under the TRRP rule

Attendees will become acquainted with rules, key guidance and policies covering affected property assessments, protective concentration levels, and response actions. The course material presents strategies for efficient project management in compliance with TRRP and explains the various report forms adopted by TCEQ.

TAEP image

Sponsored by: ​
Texas Association of Environmental Professionals (TAEP) TAEP is the premier organization for environmental professionals in the State of Texas. The goals of TAEP include the advancement of the environmental profession and the establishment of a forum to discuss important environmental issues. TAEP members receive a 10% discount. Please call 713.522.6300 for the code.

Dates and Location

Dates

June 14th and 15th, 2022

Location

Crowne Plaza River Oaks 2712 SW Freeway Houston, Texas 77098 713.523.8448 http://www.crowneplaza.com/

Price and Registration

Early-Bird Price

(Paid by May 1, 2022)
$XXX

Standard Price

(Paid after May 1, 2022)
$XXX

TAEP Membership Price

$XXX

Government Price

$XXX
Lodging and meals are not
included in course cost
REGISTER HERE

Published: 2022

Authors: Poonam R Kulkarni, Stephen D. Richardson, Blossom N. Nzeribe, David T. Adamson, Shashank S. Kalra, Shaily Mahendra, Jens Blotevogel, Andrea Hanson, Greg Dooley, Sharyl Maraviov, Jovan Popovic,

Abstract

A mobile treatment system equipped with a custom-built sonolysis reactor was deployed at a site in California to treat groundwater impacted with per- and polyfluoroalkyl substances (PFAS). Extracted groundwater was treated in a 700-kHz sonolysis reactor for batch treatment under different power densities (122, 203, and 305  W/L
) and operating temperatures (15°C and 25°C). Sonolytic treatment resulted in 93%–100% removal of the 15 PFAS identified in the groundwater, and PFAS degradation rates increased proportionally with increasing power density and temperature at operating conditions of 25°C. For all experimental conditions evaluated, greater removal was observed for perfluorinated carboxylic acids (PFCAs) [e.g., 95.1% to 100% for perfluorohexanoic acid (PFHxA)] than perfluorinated sulfonic acids (PFSAs) [68.3% to 95.2% for perfluorohexane sulfonate (PFHxS)] for similar carbon chain lengths. Similarly, greater removal was observed for longer-chain PFAS [e.g., 95.4% to 99.5% for perfluorooctanoic acid (PFOA)] compared with short-chain PFAS [56.9% to 90.4% for perfluorobutanoic acid (PFBA)]. Substantial removal of total oxidizable precursors (TOP) and specific precursors [65.5% to 99.1% for 4:2 fluorotelomer sulfonate (FTS), 6:2 FTS, 8:2 FTS, and perfluorooctane sulfonamide (FOSA)] was also observed under all conditions tested. Additionally, formation of nitrate was observed, with concentrations below maximum contaminant levels (MCLs). Overall, the results demonstrate that sonolysis treatment of PFAS-contaminated groundwater can effectively degrade PFAS without the formation of short-chain PFAS and the oxidation byproducts chlorate and perchlorate.