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USE OF CONTROLLED SLOW-RELEASE ENCAPSULATED SUBSTRATES TO ENHANCE IN-SITU REDUCTIVE DECHLORINATION PROCESSES
Meese, W. | 48th Annual Environmental Show of the South, 15-17 May, Chattanooga, TN, 32 slides, 2019
Encapsulated organic substrates were tested as an alternative method to control the release rate of organic hydrogen donors during reductive dechlorination in a 14-day experimental procedure. The procedures were performed using encapsulated calcium propionate (ECP), 80% in a distilled monoglyceride matrix. ECP was compared with regular calcium propionate (RCP) at 0.5 g/L and 1 g/L doses. Results demonstrated a significant difference in the release rates of calcium ions when comparing ECP to RCP. At 0.5 g/L ECP, calcium did not release in the first 2 days and released 5.8% after 14 days compared with 37.4% after 2 days and 56.1% after 14 days for RCP. At 1 g/L ECP, total calcium content measured 11.7% at 2 days and 17.5% at 14 days compared with 56.1% after 2 days and at 65.4% after 14 days for RCP. https://www.tn.gov/content/dam/tn/environment/solid-waste/documents/esos/sw_esos-11_2019-05-16-0900-meese.pdf
Encapsulated organic substrates were tested as an alternative method to control the release rate of organic hydrogen donors during reductive dechlorination in a 14-day experimental procedure. The procedures were performed using encapsulated calcium propionate (ECP), 80% in a distilled monoglyceride matrix. ECP was compared with regular calcium propionate (RCP) at 0.5 g/L and 1 g/L doses. Results demonstrated a significant difference in the release rates of calcium ions when comparing ECP to RCP. At 0.5 g/L ECP, calcium did not release in the first 2 days and released 5.8% after 14 days compared with 37.4% after 2 days and 56.1% after 14 days for RCP. At 1 g/L ECP, total calcium content measured 11.7% at 2 days and 17.5% at 14 days compared with 56.1% after 2 days and at 65.4% after 14 days for RCP. https://www.tn.gov/content/dam/tn/environment/solid-waste/documents/esos
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