Denatonium benzoate (DB) is added to many common commercial products, such as antifreeze, to deter ingestion by humans and animals. The intensely bitter taste is detectable by humans at concentrations as low as 50 ug/L while 10 � 30 mg/L concentrations can render drinking water unpalatable. Given the push by US lawmakers to mandate that DB be added to some commercial antifreeze formulations, it is imperative that potential environmental consequences associated with accidental releases of this material be investigated. Accordingly, the main objective of this study was to evaluate the kinetics of denatonium sorption to three types of clay minerals. Denatonium sorbs via a pseudo-second order process for each clay. The activation energy for sorption to Syn-1 is 25.89 kJ/mol. Surface-area normalized sorption capacities showed that sorption was greatest for SWy-2 and least for Syn-1. Thus, a possible treatment method for water-impacted by DB could include SWy-2 clay as an absorbent.

Sorption kinetics of denatonium benzoate to 2:1 layered aluminosilicate minerals

244th National Meeting (2012)

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