714
T. Liao et al.
Table 6 SEM element concentration table of filter residue
Sopt 1
Sopt 2
Sopt
As
Atomic conc.
31.18
12.00
29.36
Weight conc.
52.95
16.56
37.52
S
Atomic conc.
14.54
3.34
15.10
Weight conc.
10.57
1.97
8.26
Fe
Atomic conc.
18.60
65.42
45.42
Weight conc.
23.54
67.28
43.26
O
Atomic conc.
35.67
9.51
0.00
Weight conc.
12.94
2.80
0.00
Cu
Atomic conc.
0.00
9.72
10.12
Weight conc.
0.00
11.38
10.96
20
40
60
80
5000
10000
15000
20000
25000
30000
1
1
1
2
2
2
3
3
intensity (counts)
2θ(degree)
1-Fe
2-As 2 O 3
3-Fe 2 O 3
Fig. 3 XRD pattern of filter residue was verified
Fig. 4 Experimental schematic diagram