3
4) Experiment Water Source
For this experiment the water source used is the
Rothschönberger Stolln. Direct water was sampled from
the drainage channel and investigated with some carbon
sorbents without pre – treatment of the water. The result-
ing ion concentrations were analyzed by the Microwave
Plasma Atomic Emission Spectrometer (MPAES) and also
milieu parameters measured, the adsorption capacities of
the sorbents (APTsorb, activated coke, some charred fer-
mentation residues from the University) were separately
analyzed from the loading to the breakthrough point. Not
only Zinc was considered, but also all elements which were
present in orders of magnitude above 5% of the zinc ion
concentration. This includes the elements Ca and Mg. The
table below shows the various dates at which the water was
sampled and their respective ion concentrations.
Table 1. Mass fractionally relevant ion concentrations at
various water sampling time
Date
Zn
(mg/L)
Ca
(mg/L)
Mg
(mg/L)
Na
(mg/L)
Mn
(mg/L)
23.06.22 3.12 128.9 25.9 36.9 0.61
04.08.22 3.3 150 27.1 47.3 0.55
11.08.22 2.82 152 26.2 47.2 0.52
14.09.22 3.57 122 25.6 45.3 0.51
B. Methods
1) Literature research on active plants for comparison
(The Soudan Mine Experiment by (Eger et al., 2009)
This paper gave the database of the whole study of the
Soudan Mine – helping in understanding even the relevant
costs and economic profits in relation to them adapting
this method of water treatment. Furthermore, the previous
research work conducted by students at the Mining faculty
on carbon sorbents also provided some information for this
literature work.
2) Column Experiments
In a column experiment, a Plexiglas column of 10 ml capac-
ity was selected for this experiment. Each resin to be inves-
tigated was loosely placed inside the column. Due to the
size of the column the same weight of the resin was not
attained because they have different densities. The table
below shows the mass of materials used for the different
experiments. For the three different experiments, the
required mass of the resin was stuffed in the column to get
the desired height of the bed. A layer of glass wool was put
below the glass column to allow just the water to pass
through. Also, a glass wool was placed at the cap of the glass
column also to prevent the resin from coming out of the
column. The sample source for the experiment (RSS water)
which had different pH (7.6, 7,4, 7.30) at the different
times of sampling was pumped upward at the flow rate
which has been calculated by using the peristaltic pump
model IPC from Ismatec ®. At regular intervals due to sam-
pling, the water that comes at the outlet was collected and
this was made possible using the Autosampler manufac-
tured by the University. The residual concentrations were
measured using photometry and MPAES.
To start the experiment, it was necessary to avoid con-
tamination and hence the whole tubing was filled with
distilled water before each of the three experiments. This
process possibly helps us to determine if factors like the pH
of the solution is influenced only by the material or whether
the material releases material into the water. After the entire
system was filled, the experiment was continued with the
initiating solution and the autosampler was switched on.
A peristaltic pump with planetary drive, model IPC from
Ismatec ® was used to pump the sample liquids. In deter-
mining the flow rate for this experiment, the tube diameter
in the pump was essential. For this diameter, the pump pre-
sets the flow rate range in ml/min to enable the speeds to be
set. For a velocity of 80 ml/h required for this experiment,
it corresponds to a set velocity of 1.33 ml/min which is
equivalent to 1BV/h.
Figure 3. Set-up of the small column experiments with
an auto sampler manufactured at the TU Bergakademie
Freiberg(left), filled column (center) and a peristaltic pump
(right)
4) Experiment Water Source
For this experiment the water source used is the
Rothschönberger Stolln. Direct water was sampled from
the drainage channel and investigated with some carbon
sorbents without pre – treatment of the water. The result-
ing ion concentrations were analyzed by the Microwave
Plasma Atomic Emission Spectrometer (MPAES) and also
milieu parameters measured, the adsorption capacities of
the sorbents (APTsorb, activated coke, some charred fer-
mentation residues from the University) were separately
analyzed from the loading to the breakthrough point. Not
only Zinc was considered, but also all elements which were
present in orders of magnitude above 5% of the zinc ion
concentration. This includes the elements Ca and Mg. The
table below shows the various dates at which the water was
sampled and their respective ion concentrations.
Table 1. Mass fractionally relevant ion concentrations at
various water sampling time
Date
Zn
(mg/L)
Ca
(mg/L)
Mg
(mg/L)
Na
(mg/L)
Mn
(mg/L)
23.06.22 3.12 128.9 25.9 36.9 0.61
04.08.22 3.3 150 27.1 47.3 0.55
11.08.22 2.82 152 26.2 47.2 0.52
14.09.22 3.57 122 25.6 45.3 0.51
B. Methods
1) Literature research on active plants for comparison
(The Soudan Mine Experiment by (Eger et al., 2009)
This paper gave the database of the whole study of the
Soudan Mine – helping in understanding even the relevant
costs and economic profits in relation to them adapting
this method of water treatment. Furthermore, the previous
research work conducted by students at the Mining faculty
on carbon sorbents also provided some information for this
literature work.
2) Column Experiments
In a column experiment, a Plexiglas column of 10 ml capac-
ity was selected for this experiment. Each resin to be inves-
tigated was loosely placed inside the column. Due to the
size of the column the same weight of the resin was not
attained because they have different densities. The table
below shows the mass of materials used for the different
experiments. For the three different experiments, the
required mass of the resin was stuffed in the column to get
the desired height of the bed. A layer of glass wool was put
below the glass column to allow just the water to pass
through. Also, a glass wool was placed at the cap of the glass
column also to prevent the resin from coming out of the
column. The sample source for the experiment (RSS water)
which had different pH (7.6, 7,4, 7.30) at the different
times of sampling was pumped upward at the flow rate
which has been calculated by using the peristaltic pump
model IPC from Ismatec ®. At regular intervals due to sam-
pling, the water that comes at the outlet was collected and
this was made possible using the Autosampler manufac-
tured by the University. The residual concentrations were
measured using photometry and MPAES.
To start the experiment, it was necessary to avoid con-
tamination and hence the whole tubing was filled with
distilled water before each of the three experiments. This
process possibly helps us to determine if factors like the pH
of the solution is influenced only by the material or whether
the material releases material into the water. After the entire
system was filled, the experiment was continued with the
initiating solution and the autosampler was switched on.
A peristaltic pump with planetary drive, model IPC from
Ismatec ® was used to pump the sample liquids. In deter-
mining the flow rate for this experiment, the tube diameter
in the pump was essential. For this diameter, the pump pre-
sets the flow rate range in ml/min to enable the speeds to be
set. For a velocity of 80 ml/h required for this experiment,
it corresponds to a set velocity of 1.33 ml/min which is
equivalent to 1BV/h.
Figure 3. Set-up of the small column experiments with
an auto sampler manufactured at the TU Bergakademie
Freiberg(left), filled column (center) and a peristaltic pump
(right)