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2) Chlorinated solvents such as carbon tetrachloride (CCI4) can be degraded in a process called reductive dechlorination where Cl atoms are removed and replaced with H atoms. For example: CCl4 + H+ +2е¯ CHCl3 + CI Eº = 0.67 V In the process of in situ bioremediation an electron donor such as acetate (CH3COO¯) is typically added and is oxidized to provide the electrons for the reduction of CCl4. In groundwater devoid of oxygen, nitrate typically serves as the electron acceptor. Answer the questions below using thermodynamics data and that provided above. i) Can CCl4 could serve as an electron acceptor for acetate? ii) Which electron acceptor, CCl4 or NO3, would be thermodynamically preferred? iii) What do the results in i and ii imply for remediation in an aquifer that also contains nitrate?

2) Chlorinated solvents such as carbon tetrachloride (CCI4) can be degraded in a process called reductive dechlorination where Cl atoms are removed and replaced with H atoms. For example: CCl4 + H+ +2е¯ CHCl3 + CI Eº = 0.67 V In the process of in situ bioremediation an electron donor such as acetate (CH3COO¯) is typically added and is oxidized to provide the electrons for the reduction of CCl4. In groundwater devoid of oxygen, nitrate typically serves as the electron acceptor. Answer the questions below using thermodynamics data and that provided above. i) Can CCl4 could serve as an electron acceptor for acetate? ii) Which electron acceptor, CCl4 or NO3, would be thermodynamically preferred? iii) What do the results in i and ii imply for remediation in an aquifer that also contains nitrate?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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2) Chlorinated solvents such as carbon tetrachloride (CCI4) can be degraded in a process called reductive dechlorination where Cl atoms are removed and replaced with H atoms. For example: CCl4 + H+ +2е¯ CHCl3 + CI Eº = 0.67 V In the process of in situ bioremediation an electron donor such as acetate (CH3COO¯) is typically added and is oxidized to provide the electrons for the reduction of CCl4. In groundwater devoid of oxygen, nitrate typically serves as the electron acceptor. Answer the questions below using thermodynamics data and that provided above. i) Can CCl4 could serve as an electron acceptor for acetate? ii) Which electron acceptor, CCl4 or NO3, would be thermodynamically preferred? iii) What do the results in i and ii imply for remediation in an aquifer that also contains nitrate?
Transcribed Image Text:2) Chlorinated solvents such as carbon tetrachloride (CCI4) can be degraded in a process called reductive dechlorination where Cl atoms are removed and replaced with H atoms. For example: CCl4 + H+ +2е¯ CHCl3 + CI Eº = 0.67 V In the process of in situ bioremediation an electron donor such as acetate (CH3COO¯) is typically added and is oxidized to provide the electrons for the reduction of CCl4. In groundwater devoid of oxygen, nitrate typically serves as the electron acceptor. Answer the questions below using thermodynamics data and that provided above. i) Can CCl4 could serve as an electron acceptor for acetate? ii) Which electron acceptor, CCl4 or NO3, would be thermodynamically preferred? iii) What do the results in i and ii imply for remediation in an aquifer that also contains nitrate?
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