Environmental engineers and scientists are becoming concerned about pharmaceuticals in the environment. The moodstabilizing drug carbamazepine is discharged into a small lake (through a river feeding the lake) at an influent concentration of 11 mg/L. The lake has a surface area of 1.1 acres and a mean depth of 6 feet. The flow of the rivers feeding and draining the lake is 3000 cubic feet per second (cfs). The drug is degraded naturally in the lake with a first-order rate constant of 15hr1 and generate with zero order rate constant of 21(mg/L)hr1. What is the drug concentration ( mg/L ) in a river draining the lake at steady state? (1 acres = 43,560ft2) Environmental engineers and scientists are becoming concerned about pharmaceuticals in the environment. The moodstabilizing drug carbamazepine is discharged into a small lake (through a river feeding the lake) at an influent concentration of 11 mg/L. The lake has a surface area of 1.1 acres and a mean depth of 6 feet. The flow of the rivers feeding and draining the lake is 3000 cubic feet per second (cfs). The drug is degraded naturally in the lake with a first-order rate constant of 15hr1 and generate with zero order rate constant of 21(mg/L)hr1. What is the drug concentration ( mg/L ) in a river draining the lake at steady state? (1 acres = 43,560ft2)