2015 SMART Remediation Vancouver – January 27, 2015

Una Radoja, Harper Grey LLP
Case Study: Cost Recovery under the Environmental Management Act J.I. Properties Inc. v. PPG Architectural Coatings Canada Inc.
Bio | Abstract | Presentation

Dan Leigh, Peroxychem Environmental Solutions
Comparison of In Situ Chemical Reduction to Enhanced Reductive Dechlorination to Treat Chlorinated Ethenes
Bio | Abstract | Presentation

Jeff Burke, Milestone
Case Study: Arsenic Groundwater Remediation Using a Zero Valent Iron (ZVI) Permeable Reactive Barrier (PRB) and ZVI Injection
Bio | Abstract | Presentation

Jean Paré, Chemco inc.
Slow Release Persulfate and MultiOx™ Cylinders for Passive, Long-term Treatment of Petroleum Hydrocarbon Contaminated Sites
Bio | Abstract | Presentation

Slow Release Persulfate and MultiOx™ Cylinders for Passive, Long-term Treatment of Petroleum Hydrocarbon Contaminated Sites

Groundwater impacted with petroleum hydrocarbon contamination (e.g. benzene, toluene, ethylbenzene, xylene (BTEX), methyl-tert butyl alcohol (MTBE), and polycyclic aromatic hydrocarbons (PAH’s)) is common. In situ chemical oxidation using persulfate and permanganate, or combinations of persulfate and permanganate has been successfully as a treatment technology for the remediation of petroleum hydrocarbons and BTEX compounds. The application of Persulfate SR (Slow Release) ISCO reagent and MultiOx™ SR ISCO reagent cylinders are novel remedial approaches for the implementation that are sustainable low footprint, does not require the injection of liquids, and minimizes disruption of active facilities. This presentation will show case a series of bench-scale oxidation experiments were performed to (i) understand oxidant release rates from slow-release persulfate or MultiOx cylinders versus direct chemical injection, (ii) determine the persistence of oxidants in site soil, and (iii) determine the kinetic rate of contaminant degradation. Oxidant release rates from slow release oxidant cylinders were evaluated in a series of long-term 1-D column experiments. Soil oxidant demand was experimentally determined from a range of oxidant concentrations. Additionally, batch contaminant oxidation experiments were conducted in deionized water and soil materials to evaluate the potential of natural activation mechanisms. Kinetic models were used to describe the contaminant oxidation rates and regression models were developed to quantify the release of oxidants from the cylinders. Finally, 1-D column experiments were conducted to demonstrate BTEX/MTBE oxidation efficiency from slow-release persulfate and MultiOx cylinders. Based on the lab work above, a conceptual framework was developed that incorporated (i) oxidant release from the cylinders, (ii) soil oxidant demand rates, and (iii) contaminant oxidation kinetics. Results from these experiments demonstrate that the oxidant released from the cylinders is sufficient to overcome the soil oxidant demand, and can effectively degrade petroleum hydrocarbon contaminants in situ. The utilization of slow release persulfate or MultiOx cylinders can provide a simple, long-term and cost-effective approach for remediating petroleum hydrocarbon contamination in the subsurface. The cylinders can be easily emplaced in the subsurface using direct-push technology or suspended in wells for easy recharge. There is great potential to combine the slow release oxidant cylinders with other technologies such as biological remediation or other mass removal strategies (e.g. excavation, SVE) for accelerated and more efficient site remediation.

Bruce Tunnicliffe, Vertex Environmental Inc.
High Resolution Characterization
Bio | Abstract | Presentation

Garry Ogletree, Nelson Environmental Remediation
Low Temperature Thermal Desorption: An Innovative and Environmentally Sound Means for Remediation of Hydrocarbon Contaminated Soil
Bio | Abstract | Presentation

Low Temperature Thermal Desorption: An Innovative and Environmentally Sound Means for Remediation of Hydrocarbon Contaminated Soil

Often hydrocarbon impacted soil is disposal at a landfill. This method does not remediate the soil, it merely re-locates the problem. From an environmental perspective, landfilling is not sustainable. Low Temperature Thermal Desorption (LTTD) is an innovative process of remediating hydrocarbon contaminated soils, sediments and sludge in a sustainable manner which preserves the remediated soil for re-use while eliminating liability. LTTD is an Ex-Situ means of physically separating volatile and semi volatile organic contaminants from the soils through application of heat, incorporating sound environmental practices. Hydrocarbon impacted soils are placed in a rotary drum desorber, and heated to volatilize the hydrocarbons. The process gas stream is then routed through a baghouse to remove particulates and the contaminants of concern (COC’s) are routed to a thermal oxidizer, converting the COC’s into carbon dioxide and water. The clean treated soil can be recycled and returned to the site of origin, to be used as backfill, or for re-use on site for a variety of purposes. This presentation will focus on the technology, and the performance factors one must consider in order to successfully use Low Temperature Thermal Desorption. These factors include proper logistical planning, site requirements, the soil’s physical properties (these include the moisture, the plasticity, heat capacity, particle size, and bulk density of the influent soil). The COC’s characteristics and concentrations, volume of contaminated soil and fuel sources, are all factors that can affect the effectiveness of the treatment process. Operational issues; like frost and frozen ground conditions, plant operations, treated stockpile confirmation sampling and reinstatement/backfilling will be discussed to help understand the real issues that occur after the selection and applicability of the technology.

2015 SMART Remediation Vancouver – January 27, 2015

Sponsors:

Speakers

Una Radoja

Case Study: Cost Recovery under the Environmental Management Act J.I. Properties Inc. v. PPG Architectural Coatings Canada Inc.

Dan Leigh

Comparison of In Situ Chemical Reduction to Enhanced Reductive Dechlorination to Treat Chlorinated Ethenes

Jeff Burke

Case Study: Arsenic Groundwater Remediation Using a Zero Valent Iron (ZVI) Permeable Reactive Barrier (PRB) and ZVI Injection

Jean Paré

Slow Release Persulfate and MultiOx™ Cylinders for Passive, Long-term Treatment of Petroleum Hydrocarbon Contaminated Sites

Bruce Tunnicliffe

High Resolution Characterization

Garry Ogletree

Low Temperature Thermal Desorption: An Innovative and Environmentally Sound Means for Remediation of Hydrocarbon Contaminated Soil

Quicklinks