Surface decontamination efficacy determination of DeconGel™ 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with mercury compounds (mercury(ll) oxide (HgO)) 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
Mercury compounds are commonly used for a variety of industrial applications. Mercury oxide is often decomposed to produce elemental mercury and is used in the production of mercuric batteries. Mercury compounds are highly toxic if ingested or inhaled. Mercury(ll) oxide was chosen as a representative of mercury compounds for evaluating DeconGel's efficacy; DeconGel is expected to have similar efficacy towards the wide range of mercury compounds.
- Excellent surface decontamination was achieved by applying DeconGel 1101 onto surfaces contaminated with mercury (II) oxide, resulting in encapsulation of mercury oxide by DeconGel's active components. Decontamination efficacies of poured DeconGel 1101 were higher than 99.8% on a variety of surfaces including stainless steel, carbon steel and concrete.
- 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 mercury(ll) oxide compounds as determined by residual swipe testing.