Removal and Adsorption of p-Nitrophenol from Aqueous Solutions Using Carbon Nanotubes and Their Composites
Table 1
The raw CNTs used in the experiments.
Type of CNTs
Main range of diameter
Length
Purity
Ash
Specific surface area
Amorphous carbon
Aligned MWNTs
10–30 nm
5–15 m
≥95%
≤0.2 wt%
160–200 m2/g
<3%
L.MWNTs-10
<10 nm
5–15 m
≥95%
≤0.2 wt%
250–500 m2/g
<3%
S.MWNTs-10
<10 nm
1-2 m
≥95%
≤0.2 wt%
250–500 m2/g
<3%
S.MWNTs-1030
10–30 nm
1-2 m
≥95%
≤0.2 wt%
100–160 m2/g
<3%
S.MWNTs-2040
20–40 nm
1-2 m
≥95%
≤0.2 wt%
70–150 m2/g
<3%
S.MWNTs-4060
40–60 nm
1-2 m
≥95%
≤0.2 wt%
60–120 m2/g
<3%
S.MWNTs-60100
60–100 nm
1-2 m
≥95%
≤0.2 wt%
40–70 m2/g
<3%
R.SWNTs
<2 nm
5–15 m
≥95%
≤0.2 wt%
500–700 m2/g
<5%
Notes: the acronym “L” is “long” and “S” is “short.” Therefore, the acronyms “L.MWNTs” and “S.MWNTs” are defined as long MWNTs and short MWNTs, respectively.
