The Use of Conventional and Surface Enhanced Raman Spectroscopy to Evaluate Chemistries for the Detection and/or Remediation of Pechlorate in Aqueous Systems

摘要

Perchlorate is highly soluble and non-reactive with soil sediments. As a result perchlorate is exceedingly mobile in aqueous systems. Because of its resistance to react with other available constituents, perchlorate can persist for many decades under typical ground and surface water conditions. Detection and remediation of perchlorate often rely on the use of resins and coatings to selectively extract/concentrate perchlorate from its aqueous environment. In this chapter, the use of both conventional (normal) Raman spectroscopy and surface enhanced Raman spectroscopy (SERS) to evaluate the effectiveness of the chemistries used in the resins and coatings to selectively extract perchlorate will be discussed. Specifically SERS has been used to evaluate the selectivity of cationic self assembled monolayers (SAMs) for anions and conventional Raman spectroscopy has been used to compare the performance of two similar bifunctional resins, Purolite A-530 and Amberlite PWA-2.