chlorinated organic compounds are resistant to oxidation

under natural environmental conditions (USEPA, 1979).


3.3.3 Hydrolysis


 The rate of hydrolysis of a chemical compound can be

calculated by

 -dC/dt = kA [H+] [C] + kB [OH ] [C] + kN [C] (3-9)

where kA and kB =second-order acid and base hydrolysis

constants, respectively; and kN= first-order hydrolysis rate

constant for pH independent reactions (Moore and

Ramamoorthy, 1984).

 The covalent bond of a substituent attached to an

aromatic ring is usually resistant to hydrolysis because of

the high negative charge density of the aromatic nucleus.

Therefore, hydrolysis of phenolic compounds in a natural

groundwater environment will not be a significant process

(USEPA, 1979; Moore and Ramamoorthy, 1984).


3.3.4 Volatilization


 The rate of volatilization for general organic

compounds is described by Smith et al. (1980) as
 -1
 -dC/dt = k [C) = C/L [1/k1 + R T/H k ]1 (3-10)
 -1
where k = volatilization rate constant (hr )

 L = depth of aqueous layer

 kl= transfer coefficient in the liquid phase (cm/hr)

 H = Henry's law constant (torr/M)

 k = transfer coefficient in the gas phase (cm/hr)
 g