5
and got a sorption capacity of 0.127 meq/g we can say the
expansion of the granules during the test could have pre-
vented the optimal flow around them.
2) Experiment B: Activated Coke
The concentrations of zinc ions begin to increase from the
first sampling of the sorption phase and increases to around
2.2 mg/L until it fluctuates until it reaches the highest val-
ues of 2.99 mg/L and 3.41 mg/L. During the initial phase,
the pH value starts form 10.2 at the 2BV. The value then
stabilizes at the value of 8 and this is carried through to the
end of the experiment. The Eh value is as well at the highest
corresponding to the highest value of the Zinc concentra-
tion of 3.41. This means that the zinc was precipitated at
that point due to the oxidation state of the solution.
Meanwhile, we see the lowest Eh value also corresponding
to the lowest values of the zinc concentration indicating
more zinc in solution in a reduced state.
At the end of the experiment at BV5376, a total of
87.00 mg Zn/g was adsorbed and -0.001 mg Zn/g desorbed.
A total of 53 liters of water was treated for this experiment.
This corresponds to a capacity of 0.53 meq/g comparing to
Lisa Johnke who worked with similar material and attained
a capacity of 0.61 meq/g. It can be surmised that the mate-
rial is good in comparison to the capacity value obtained
by Lisa and in this experiment. The material shows a break-
through just at the 2BV of the sorption phase indicating an
affinity of the material to adsorb zinc.
Figure 5. Results of the column experiment B with respect
to Zn, pH and Eh
3) Experiment C: Charred Fermentation Residue
The experiment breakthrough at the 2BV with a Zn con-
centration of 0.09 mg/L and maintain a steady concentra-
tion through until 1668 BV where the concentration begins
to rise. This material shows a very meaningful curve with
consistent values. At the same time the pH starts with a
value of 8.0 and at the time the experiment is stopped, a
pH of 8.35 is recorded. The pH value as it rises from 8
drops to 7 steadily around the middle part of the experi-
ment before it rises again to 8 It can be inferred the break-
through curve lies slightly below the Eh curve indicating a
more dissolved zinc in solution.
With respect to zinc a breakthrough was achieved at
2BV and taking into account the MPAES error of 5%.
Throughout the entire experiment from sorption phase to
breakthrough, a total of 140.92 mg of Zn was adsorbed
representing 4.3 meq of Zinc. This correlates to an adsorp-
tion capacity of 1.69 meq/g. comparing this to the adsorp-
tion capacity (1.55 meq/g) of Lisa Johnke with the same
material from loading to exhaustion, it can be inferred that
the material is able to reach a full capacity.
C. Zinc Adsorption of Materials in Relation to Their
Capacities
The summarized results of the column tests with regard to
their sorption of the zinc as shown in Table 4.
Looking at the result of the experiment we realize that
the amount of zinc adsorbed was different for every mate-
rial. For the material A- APTsorb, the zinc adsorption was
Figure 6. Results of the column experiment C with respect
to Zn, pH and Eh
and got a sorption capacity of 0.127 meq/g we can say the
expansion of the granules during the test could have pre-
vented the optimal flow around them.
2) Experiment B: Activated Coke
The concentrations of zinc ions begin to increase from the
first sampling of the sorption phase and increases to around
2.2 mg/L until it fluctuates until it reaches the highest val-
ues of 2.99 mg/L and 3.41 mg/L. During the initial phase,
the pH value starts form 10.2 at the 2BV. The value then
stabilizes at the value of 8 and this is carried through to the
end of the experiment. The Eh value is as well at the highest
corresponding to the highest value of the Zinc concentra-
tion of 3.41. This means that the zinc was precipitated at
that point due to the oxidation state of the solution.
Meanwhile, we see the lowest Eh value also corresponding
to the lowest values of the zinc concentration indicating
more zinc in solution in a reduced state.
At the end of the experiment at BV5376, a total of
87.00 mg Zn/g was adsorbed and -0.001 mg Zn/g desorbed.
A total of 53 liters of water was treated for this experiment.
This corresponds to a capacity of 0.53 meq/g comparing to
Lisa Johnke who worked with similar material and attained
a capacity of 0.61 meq/g. It can be surmised that the mate-
rial is good in comparison to the capacity value obtained
by Lisa and in this experiment. The material shows a break-
through just at the 2BV of the sorption phase indicating an
affinity of the material to adsorb zinc.
Figure 5. Results of the column experiment B with respect
to Zn, pH and Eh
3) Experiment C: Charred Fermentation Residue
The experiment breakthrough at the 2BV with a Zn con-
centration of 0.09 mg/L and maintain a steady concentra-
tion through until 1668 BV where the concentration begins
to rise. This material shows a very meaningful curve with
consistent values. At the same time the pH starts with a
value of 8.0 and at the time the experiment is stopped, a
pH of 8.35 is recorded. The pH value as it rises from 8
drops to 7 steadily around the middle part of the experi-
ment before it rises again to 8 It can be inferred the break-
through curve lies slightly below the Eh curve indicating a
more dissolved zinc in solution.
With respect to zinc a breakthrough was achieved at
2BV and taking into account the MPAES error of 5%.
Throughout the entire experiment from sorption phase to
breakthrough, a total of 140.92 mg of Zn was adsorbed
representing 4.3 meq of Zinc. This correlates to an adsorp-
tion capacity of 1.69 meq/g. comparing this to the adsorp-
tion capacity (1.55 meq/g) of Lisa Johnke with the same
material from loading to exhaustion, it can be inferred that
the material is able to reach a full capacity.
C. Zinc Adsorption of Materials in Relation to Their
Capacities
The summarized results of the column tests with regard to
their sorption of the zinc as shown in Table 4.
Looking at the result of the experiment we realize that
the amount of zinc adsorbed was different for every mate-
rial. For the material A- APTsorb, the zinc adsorption was
Figure 6. Results of the column experiment C with respect
to Zn, pH and Eh