Nano particle
Amount of catalyst/20ml
k・sec−1
Time taken for complete degradation (min)
COD values in mg/L
Degradation efficiency %
Before degradation
After degradation
Commercial ZnS
0.02 g
1.5 × 10−4
92
352
288
18.18
Zinc sulphide
0.02 g
14.04 × 10−4
22
352
16
95.45
0.04 g
17.13 × 10−4
22
352
16
95.45
0.06 g
12.95 × 10−4
22
352
16
95.45
0.02 g
4.93 × 10−5
210
192
32
83.33
0.04 g
7.67 × 10−5
150
192
64
66.66
0.06 g
6.39 × 10−5
130
192
96
50.00