To keep our environmental industry clients and colleagues informed of recent and recognized developments in environmental remediation technologies and techniques, AST employs several methods of providing technology transfer that we feel are relevant, flexible, and important to our clientele. From live webinars to in-person presentations to on-demand training, our goal is to connect you with our experienced senior staff in a technical learning format that provides the proper assistance, collaboration, and efficient use of your time. Strongly, AST believes the information we present live or on-demand encompasses the best-available technology and techniques to remediate sites small and large, from heavily-impacted source areas to dilute plumes, phreatic to vadose zone, and comingled contamination to site civil activities.
Upcoming Webinars
Reductive Dechlorination with Concurrent Sequestration of PFAS and 1,4-Dioxane in a Large Commingled Plume at a Former Manufacturing Facility & “The Passaic Gap” Series II
October 23rd | noon-1pm EST
Continuing AST’s focus on a combination of remedial techniques for weathered bedrock and competent bedrock, we are grateful to welcome Raymond Vaske, Senior Remediation Engineer, of Trihydro Corporation to present an in-depth look at the deployment of CAT 100 in the challenging Passaic Formation. This webinar encompasses the deployment of techniques discussed in Fall Webinar Series #1 with an advanced remediation technology for halogenated volatile organic compounds and emerging contaminants.
Mackinawite Structured Iron Sulfide for Heavy Metals Remediation: Abiotic vs. Biotic Formation and Case Studies
November 13th, noon-1pm EST
Several iron species for treatment of heavy metal (inorganic) contaminants are well known. Yet the efficiencies of various irons– for example, zero valent iron (ZVI), ferrous or ferric sulfate, and iron sulfides – differ greatly in reactivity, efficiency, and cost. Reactive iron sulfides (FeS) can be used for the reduction and co-precipitation of inorganic contaminants such as chromium, arsenic, and mercury. This presentation focuses on the use of mackinawite structured iron sulfide for heavy metals treatment, noting that it is inexpensive compared with ZVI ($/wt.) and more chemically efficient and persistent in the environment than ferrous sulfide or calcium polysulfide – other common products that produces reducing conditions in situ. Case studies, including injection installations, will be reviewed after a discussion of the chemistry and technology of iron reactants for heavy metals treatment.
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