Page 370 - Industrial Wastewater Treatment, Recycling and Reuse

342 Industrial Wastewater Treatment, Recycling, and Reuse

3
Figure 8.10 Nitrogen isotherm plot of ATW; low pressure dose¼10.0 cm g 1 STP,
analysis bath¼77.74 K.

Table 8.2 Surface Characteristics of TW and ATW
Property TW ATW
2
1
1. BET surface area (m g ) 2.91 1016.26
1
2
a
2. Single point surface area (m g ) 2.34 994.45
1
b
2
3. Adsorption cumulative surface area of pores (m g ) 2.19 635.77
b 2 1
4. Desorption cumulative surface area of pores (m g ) 0.64 792.44
3
c
1
5. Total pore volume (cm g ) 0.003 1.04
d
6. Adsorption average pore diameter (nm) 4.56 4.08
7. BJH adsorption average pore (nm) 15.52 6.35
8. BJH desorption average pore diameter (nm) 53.35 5.45
a
At P/P 0 0.20.
b
Applying BJH model, pore diameter in range of 1.70–300.00 nm.
c
Pores less than 73.40 nm at P/P 0 0.97.
d
BET method.
2 1
specifically low surface area in the range of 0.50–4.00 m g include BP
and AES. These figures are very low in comparison with other prepared
adsorbents. Their surface characterization properties are given in Table 8.3.
2
1
The BET surface area of binary mixed oxide, BMO, was 102.64 m g ,
1
2
while the single point surface area at P/P 0 of 0.20 was 98.93 m g .