Page 160 - Industrial Wastewater Treatment, Recycling and Reuse

134 Industrial Wastewater Treatment, Recycling, and Reuse

2 1
B D Constant in Dubunin-Radushkevich equation (mol J )
1
b L Constant in Langmuir equation (L g )
3
C e Equilibrium concentration in solution phase (mol m )
2 1
D HA Diffusion coefficient (m s )
d Diameter (m)
d T, d TO Tangential nozzle diameter at diode inlet and pipe inlet of vortex diode
Diameter of diode chamber (m)
d c
1
E Energy of adsorption (kJ mol )
HA Acid species
3
[HA] Concentration of acid (mol m )
3
Initial concentration of acid (mol m )
[HA] i
3
Outlet concentration of acid (mol m )
[HA] o
b 3
[HA] o Breakthrough concentration of acid (mol m )
H Height of diode chamber (m)
K Constant in Freundlich equation
1
k Reaction rate constant (s )
Constant in Redlich-Peterson equation
K R
1
k s a Film mass transfer coefficient (s )
Number of passes
N p
1/n Constant in Freundlich equation
1
P s , P i Power (J s )
3 1
Q Flow rate (m s )
1
Q e Equilibrium concentration in adsorbent phase (mg g )
1
q D Theoretical saturation capacity in Dubunin-Radushkevich equation (mol g )
R Molar gas constant
R b Radius of bead (m)
r c Radius of curvature (m)
T Temperature
t Time (s)
t B Breakthrough time (s)
Diffusion time (s)
t D
Reaction time (s)
t R
Flow time (s)
t F
Film transfer time (s)
t E
1
u Flow velocity (m s )
3
V Volume (m )
b Constant in Redlich-Peterson equation
h Pump efficiency
△P Pressure drop
REFERENCES
Adams, G., Jones, P.M., Millar, J.R., 1969. Kinetics of acid uptake by weak-base anion
exchangers. J. Chem. Soc. A: Inorg., Phys., Theor. 2543–2551.
Adler, S., Beaver, E., Bryan, P., Robinson, S., Watson, J., 2000. Vision 2020: 2000 Sepa-
rations Roadmap. Center for Waste Reduction Technologies of the American Institute
of Chemical Engineers, New York, pp. 10016–5991.