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LLNL-AR-788093 <br /> External <br /> 4. CWC 791: Liquids with pH<2 <br /> Site 2018 quantity (lb) <br /> LLNL 73 <br /> 4.1 B235 Aqueous and Acidic Liquids from Electrochemical Experiments <br /> Site 2018 quantity(lb) <br /> LLNL 37 <br /> Preparation of electrolyte <br /> Raw Materials: for electrochemical <br /> H drobromic acid Off Site <br /> y experiments Disposal <br /> Bromine (CWC 791) Dis p <br /> FIGURE IVA.1: PREPARATION OF MIXTURES AS ELECTROLYTE FOR <br /> ELECTROCHEMICAL EXPERIMENTS <br /> This waste was generated from electrolyte mixtures needed for electrochemical experiments <br /> focused on flow-through electrodes for energy applications (fuel cells, redox flow batteries). <br /> The initial experiments used aqueous solution of bromine in hydrobromic acid and hydrogen <br /> gas. <br /> SOURCE REDUCTION/POLLUTION PREVENTION EVALUATION <br /> Description of Measure: <br /> In early 2019, it was discovered that vanadium was a better choice for the goal of the <br /> project as well as a safer and less hazardous alternative material. The project now <br /> utilizes vanadium solutions (dissolved IV sulfate oxide hydrate in aqueous solution of <br /> sulfuric acid). LLNL plans to continue existing best management practices to minimize <br /> this waste stream. No other source reduction/pollution prevention measures are <br /> planned. <br /> September 1, 2019 SB 14 Plan IV-3 <br /> ESH-EFA-P2S-19-16592 <br />