Surface decontamination efficacy determination of DeconGel™ 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with Selenium powder was performed with ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) according to Environmental Protection Agency (EPA) SW-846 Methods: 3005A (sampling) and 6010C (analysis).
Hazardous Materials Relevance
Selenium is used in industrial applications including steel alloying and rubber compounding. It is also used to produce printers and copier drums. Selenium is hazardous by contact, ingestion, and inhalation as defined by OSHA.1 Selenium powder was chosen as a representative selenium compound for evaluating DeconGel's efficacy; DeconGel is expected to have similar efficacy towards the wide range of selenium compounds.
- Excellent surface decontamination was achieved by applying DeconGel 1101 onto surfaces contaminated with selenium resulting in encapsulation of contaminants by DeconGel's active components. Decontamination efficacies of DeconGel 1101 ranged from 96.2% (on concrete) to 99.8% (on carbon steel) to 99.2% (on stainless steel) as determined by residual swipe testing.
- Optimized experimental and analytical methods were successfully developed following standardized EPA sampling and analysis methods as guidelines for determination of inorganic compounds in aqueous samples. When necessary, experimental methods were customized to afford complete dissolution of inorganic contaminants, and to ensure accurate decontamination efficacy determination of DeconGel.
Table 1 shows the decontamination efficacies of DeconGel 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with selenium as determined by residual swipe testing.