Surface decontamination efficacy determination of DeconGelTM 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with beryllium surrogate compounds (aluminum powder (Al) and aluminum oxide (Al2O3)) was performed by 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
Beryllium compounds are used in the aerospace industry to construct lightweight and resilient alloys. Beryllium is directly corrosive to living tissue; beryllium dust is toxic by inhalation and can cause berylliosis, an incurable chronic lung disease. Due to beryllium toxicity, the commonly used beryllium surrogate aluminum was used in this study. Aluminum powder and aluminum oxide were chosen as representative beryllium surrogate compounds for evaluating DeconGel’s efficacy; DeconGel is expected to have similar efficacy towards the wide range of beryllium surrogate compounds.
- Excellent surface decontamination was achieved by applying DeconGel 1101 onto surfaces contaminated with aluminum metal dust and aluminum oxide (surrogates for beryllium metal dust and beryllium oxide respectively) resulting in encapsulation of contaminants by DeconGel’s active components. Decontamination efficacies of DeconGel 1101 ranged from 99.6% and 99.7% (on concrete) to 99.5% and 99.9% (on carbon steel) to 97.9% and 99.7% (on stainless steel) for aluminum metal dust and aluminum oxide respectively as determined by residual swipe analysis.
- Optimized experimental and analytical methods were successfully developed following standardized EPA sampling and analysis methods as guide lines 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.
Tables 1 and 2 show the decontamination efficacies of DeconGel 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with aluminum powder (Al) and aluminum oxide (Al2O3) as determined by residual swipe testing.