Surface decontamination efficacy determination of DeconGelTM 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with aluminum compounds (elemental aluminum powder (Al), aluminum oxide (Al2O3), aluminum chloride (AlCl3), and aluminum potassium sulfate (AlK(SO4)2)) was performed using 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
Aluminum and its compounds are widely used in a number of industries including consumer goods such as cosmetics and aluminum cans. Aluminum compounds can become easily airborne and as such are considered inhalation hazards. Aluminum powder, aluminum oxide, aluminum chloride, and aluminum potassium sulfate were chosen as representative aluminum compounds for evaluating DeconGel’s efficacy; DeconGel is expected to have similar efficacy towards the wide range of aluminum compounds.
- Excellent surface decontamination was achieved by applying DeconGel 1101 onto surfaces contaminated with aluminum compounds resulting in encapsulation of contaminants by DeconGel’s active components. Decontamination efficacies of DeconGel 1101 for aluminum compounds (except aluminum powder elemental which is corrosive and reacts with the metal surfaces evaluated) were from greater than 93.0% (on concrete) to greater than 95.4% (on carbon steel) to greater than 96.4% (on stainless steel) as determined by residual swipe analysis.
- Aluminum powder is reactive to some metal surfaces including carbon steel and stainless steel. DeconGel could not completely remove aluminum elemental powder that reacted with and created a fixed deposit on steel surfaces. Nevertheless, DeconGel showed excellent decontamination efficacy on loose aluminum powder contaminant from such surfaces.
- Optimized experimental and analytical methods were successfully developed following standardized EPA sampling and analysis methods as guidelines for determination of inorganics in aqueous samples. When necessary, the digestion methods were customized to result in the complete dissolution of the inorganic contaminants and to ensure accurate decontamination efficacy determination of DeconGel.
Tables 1 through 4 show the decontamination efficacies of DeconGel 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with elemental aluminum powder (Al), aluminum oxide (Al2O3), aluminum chloride (AlCl3) and aluminum potassium sulfate (AlK(SO4)2) as determined by residual swipe testing.