3. (25 pts) Benzene, a toxic carcinogenic contaminant, can be completely oxidized to carbon dioxide via providing sulfat

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3 25 Pts Benzene A Toxic Carcinogenic Contaminant Can Be Completely Oxidized To Carbon Dioxide Via Providing Sulfat 1 (30.93 KiB) Viewed 13 times

3. (25 pts) Benzene, a toxic carcinogenic contaminant, can be completely oxidized to carbon dioxide via providing sulfate to anaerobic cultures in highly reduced sediments. a. Write down the half reactions and the balanced redox reaction for the oxidation of benzene (CH) to carbon dioxide (CO₂) coupled to sulfate reduction (SO² → H₂S) How much 30 mM SO² solution must be added to degrade 1 L of benzene? b. c. Given that the biodegradation of benzene in groundwater has an approximated rate constant of 0.28 day, how long would it take to degrade 63% of the initial benzene concentration? d. (Bonus: 3 pts) How long would it take to degrade 99% of 1 L of benzene? Atomic mass data (g/mol): H= 1; C = 12; O = 16; S=32 Density of benzene: 876 g/L Avogadro's number, N₁= 6.02x1023 molecules/mol