Environmental Organic Chemistry Instructor: Jaeweon Cho

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Environmental Organic ChemistryInstructor
Jaeweon Cho
6th Week Class
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Charged species differ in properties, rxn,
transport vs. transformation fate in natural
systems
8.1 Introduction
Acid (HA), proton donor, reacts with a base (B),
a proton acceptor.
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fil
PiL
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Kia
At low to moderate I, ?HA ?A-1
pKia low, medium, high, at neutral pH
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X
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8.3 Chemical structure and acidity
constantInductive Effects, Delocalization
Effects, Proximity Effects
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8.4 Estimation of Acidity Constants
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9. Sorption I Organic Matters (Particulate and
Dissolved)
This textbook supposes organic matter as
hydrophobic, i.e., humic substances thats OK
and sometimes true for NOM present in US,
however, there are others as well, especially in
Korea and some of European country.Please
remember humic is not an only NOM! I am not
sure yet on NOM of other Asian and African
countries.Measurements of POM as POC, and DOC
what is ratio of DOC/POC?Once again, sorption
to organic matters is very important as once
sorbed it can represent very different trends in
transportation, transformation (including bio-),
toxicity, oxidation (degree of expose to light)
possibility, and many others (e.g., virus with
NOM can travel almost gt 2km/year in groundwater,
as opposed to virus adsorbed on soils with travel
of a few cms
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