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A pond with produced water (I = 8 M) is at equilibrium with the following reaction. Fe2(OH)4SeO3(s) + 4H+ = SeO32- + 2Fe+3 + 4H2O
A pond with produced water (I = 8 M) is at equilibrium with the following reaction. Fe2(OH)4SeO3(s) + 4H+ = SeO32- + 2Fe+3 + 4H2O K = ~50 Selenium (Se) is toxic at high concentrations. If the produced water infiltrated a pristine groundwater aquifer, which direction would the reaction shift? Would we dissolve or precipitate selenium from its mineral phase? Explain your answer by looking at changes in the activity coefficients in hypersaline conditions.
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