Presentation Title

Metallic Release from Cast Iron Corrosion Scales

Faculty Mentor

Dr. Liu

Start Date

17-11-2018 8:30 AM

End Date

17-11-2018 10:30 AM

Location

HARBESON 54

Session

POSTER 1

Type of Presentation

Poster

Subject Area

engineering_computer_science

Abstract

Abstract

This research was focused on corrosion scales from drinking water distribution systems. Specified sites as site A & site B. Our focus being on metal release of Cr(VI) & Se(VI), with varied water parameters. Parameters include varied pH (7 to 12.5), introduction of chlorine, and introduction of bromide with existing chlorine. Analytical instrumentation such as ICP-MS, spectrophotometer, and a pH probe were used. First, by increasing pH, there was a noticeable pattern that indicated higher pH will facilitate further desorption. Second, the introduction of chlorine, chlorine was added at every time point, measurements were taken based off present concentration measured by DPD-Colorimetric method at 510n�. This was done to determine how chlorine will interfere with water system behavior due to its oxidation properties on Iron (Fe), Selenium (Se), and Chromium (Cr), which may directly effects their sorption and solubility properties, overall changing their mobility. Third, focus on Bromide ion, since salt water contains higher concentration of Bromide ion. Bromide is and ion that will react with existing Chlorine to form Bromine and Chloride ion, Bromine being the faster oxidizer, but not as powerful as Chlorine.

Summary of research results to be presented

Given our data, we can see higher levels of metallic release with varied water parameters, specifically in the higher ranges above 8.5 pH, there is a gradual increase in dissolved solids in our DI water solution, tested via ICP-MS. In our other experiment represented, the addition of the bromide ion shows that it can effect the level of dissolved solids in our water, therefore warranting concerns while desalination water is incorporated into our water distribution lines. Future work on how we can effective grow corrosion scales that promote lesser release of toxic metals into drinking water in a dissolved state.

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Nov 17th, 8:30 AM Nov 17th, 10:30 AM

Metallic Release from Cast Iron Corrosion Scales

HARBESON 54

Abstract

This research was focused on corrosion scales from drinking water distribution systems. Specified sites as site A & site B. Our focus being on metal release of Cr(VI) & Se(VI), with varied water parameters. Parameters include varied pH (7 to 12.5), introduction of chlorine, and introduction of bromide with existing chlorine. Analytical instrumentation such as ICP-MS, spectrophotometer, and a pH probe were used. First, by increasing pH, there was a noticeable pattern that indicated higher pH will facilitate further desorption. Second, the introduction of chlorine, chlorine was added at every time point, measurements were taken based off present concentration measured by DPD-Colorimetric method at 510n�. This was done to determine how chlorine will interfere with water system behavior due to its oxidation properties on Iron (Fe), Selenium (Se), and Chromium (Cr), which may directly effects their sorption and solubility properties, overall changing their mobility. Third, focus on Bromide ion, since salt water contains higher concentration of Bromide ion. Bromide is and ion that will react with existing Chlorine to form Bromine and Chloride ion, Bromine being the faster oxidizer, but not as powerful as Chlorine.