2. (25 points). i) A contaminated soil is to be excavated and treated in a laboratory completelymixed batch reactorthat contains chemicalsthat degrade the contaminantspresent in the soil. During treatment the concentration of the pollutant in the soilwas measured and found to be:day 1, 600mg/L; day 5, 450mg/L; day 10,300mg/L. Determine the time to achieve 99%reduction in the original concentration, which also represents the retentiontime ofthis reactor. ii)Will aPlug Flow Reactor (PFR) bemore efficient in removing the contaminants from the soilifthe volume of the reactor is 400 m3, the flow of the soil slurry (i. e., the mixture of the soil withliquid chemicals added to degrade the contaminants) is20 m3/day, the slurry has differentchemicalsfor contaminantdegradation compared to the batch reactor that degrade the pollutantfollowing2ndorder kinetics with rate coefficient0.00008L/mg. day?Show your mass balance for each reactor clearly.