Answered: e wetland is 4 × 10-3 ng/L. The wetland…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A wetland with a volume of 10³m³drains into pond with a volume of 10⁶ m³. The concentration methylmercury (CH₃Hg) in the wetland is 4 × 10^-3 ng/L. The wetland is flowing into the pond at a rate of 10³ m³/day. Microbial processes are causing methylmercury to be generated within the pond at a rate of 100 ng/day. The pond has a concentration of 6 × 10^-4 ng/L CH₃ Methylmercury decays within the pond at a rate of 100 ng/day. The pond has an outflow of 10³ m³/day. Is methylmercury mass increasing or decreasing in the pond? Show all mass balance calculations?

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