Method Spotlight: Selenium Speciation of FDG Wastewaters

Coal can often contain high levels of selenium. As a result, wastewater streams from coal-fired power plants frequently have elevated concentrations of selenium, far exceeding industrial target discharge limits.

Removal of selenium from these wastewater streams can present a significant challenge as the effectiveness of most treatment processes relies heavily on the prevalence of a particular selenium species. Power plants that utilize flue gas desulfurization (FGD) systems often produce wastewaters that contain selenite, selenate, selenide, selenocyanate, methylseleninic acid, and various other organic selenocompounds. An understanding of which selenium species are present can be crucial when making important decisions regarding the design of wastewater treatment systems.

BRL offers highly advanced analytical services for the determination of selected selenium species by our customized method coupling high performance liquid chromatography (HPLC) with inductively coupled plasma – mass spectrometry (ICP-MS), employing optimized dynamic reaction cell (DRC) parameters. This HPLC-ICP-DRC-MS configuration allows for multi-isotopic detection, high sensitivity, and minimal polyatomic interferences, allowing for the separation and quantification of selenium species such as selenite [Se(IV)], selenate [Se(VI)], selenocyanate [SeCN], selenomethionine [SeMet], and methylseleninic acid [MeSe], while maintaining ultra-low detection limits.

Our typical chromatogram for Selenium Speciation by IC-ICP-MS:

 

Find out how we can help you with your next wastewater project by requesting an online quote!

BRL is Proud to be a Pet-Friendly Workplace

Brooks Rand Labs appreciates how important a positive workplace environment can be to employee satisfaction. In response, BRL allows our staff to bring their pets to work with them (within limits). This contributes to a more pleasant, reduced-stress environment for people that probably spend more time at work than their waking hours at home! Does this sound familiar to some of you?

At BRL we have the pleasure of spending our time and sharing our office space with following canines…Lucy, Teddy, Balin, Oliver, and the sweetest girl, Princess!