Preparation method and application of modified activated carbon
A technology of activated carbon and nut shell activated carbon, which is applied in chemical instruments and methods, other chemical processes, multi-stage water treatment, etc., can solve problems that have not yet been discovered, and achieve the effects of reducing heavy metal content, simplifying operating procedures, and reducing costs.
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Embodiment 1
[0027] (1) Firstly, oxidize and modify the activated carbon with 0.3mol / L potassium permanganate indoors, then put the activated carbon from fruit shells into the concentrated potassium permanganate solution for soaking and agitation in the laboratory, and soak the activated carbon after 4 hours Wash with distilled water, dry in a blast drying oven, set the temperature at 120°C, pour the sewage from the river course improvement process into the sedimentation tank in the field, take the water sample as the background value of the river water, and settle for 10 minutes. After that, it is discharged into the activated carbon adsorption tank, and the activated carbon is put into the activated carbon according to the ratio of 50g / L of the activated carbon to the river sewage, adjusted to pH = 6 with 2% NaOH solution or hydrochloric acid with a concentration of 1:1, manually agitated and centrifuged, sedimented, after 30min Take the supernatant liquid.
[0028] Taking a gold mining ...
Embodiment 2
[0040] Table 1 Summary of raw river water test results Unit: mg / L
[0041] Sample No.
pH
Cu
Pb
Zn
Cr
CD
As
Hg
15B
8.08
7.42
13.6
11.2
0.22
0.53
<0.001
<0.05
[0042] The test analysis is completed by the Experimental Test Center of Xi'an Institute of Geology and Mineral Resources, the same as below
[0043] Table 2 Summary of river water test results after pH adjustment Unit: mg / L
[0044] Sample No.
pH
Cu
Pb
Zn
Cr
CD
As
Hg
15C7
6.95
8.08
20.3
5.54
0.35
0.30
<0.001
<0.05
[0045] Table 3 List of river water test results after activated carbon adsorption at pH 7 Unit: mg / L
[0046] Sample No.
pH
Cu
Pb
Zn
Cr
CD
As
Hg
mn
15MnC7
7.02
22.9
0.36
16.2
0.53
1.05
<0.001
<0.00005
1.06
[0047] The removal rate of activated car...
Embodiment 3
[0051] Table 1 Summary of raw river water test results Unit: mg / L
[0052]
[0053] Table 2 Summary of river water test results after pH adjustment Unit: mg / L
[0054] Sample No.
pH
Cu
Pb
Zn
Cr
CD
As
Hg
15MnC8
8.08
8.04
18.2
6.49
0.27
0.33
<0.001
<0.05
[0055] Table 3 List of river water test results after activated carbon adsorption at pH 8 Unit: mg / L
[0056] Sample No.
pH
Cu
Pb
Zn
Cr
CD
As
Hg
mn
15MnC8
8.08
7.97
0.6
3.73
0.20
0.27
<0.001
<0.00005
0.25
[0057] The removal rate of activated carbon to river water under different pH in table 4
[0058] Sample No.
PUM
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