In situ photodecyanation of steel industry wastewater in a pilot scale
The photodegradation of cyanide from steel industry wastewater was explored in pilot plant scale using hydrogen peroxide (H 2 O 2 ) under UV irradiation. However, it was interesting to notice that only H 2 O 2 or only UV was inefficient to degrade the cyanide from industrial wastewater. There was a...
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| Published in: | Environmental science and pollution research international Vol. 27; no. 26; pp. 33226 - 33233 |
|---|---|
| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Berlin/Heidelberg
Springer Berlin Heidelberg
01-09-2020
Springer Nature B.V |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | The photodegradation of cyanide from steel industry wastewater was explored in pilot plant scale using hydrogen peroxide (H
2
O
2
) under UV irradiation. However, it was interesting to notice that only H
2
O
2
or only UV was inefficient to degrade the cyanide from industrial wastewater. There was a synergy between H
2
O
2
and UV radiation for the degradation of cyanide. The generated hydroxyl radicals from irradiated H
2
O
2
were responsible for the efficient degradation of cyanide. Besides, the dissolved oxygen had a significant role on the degradation process. The photodecyanation rate was faster initially and decreased gradually thereafter ensuring the industrial viability of the process. The dozing rate of H
2
O
2
and the UV lamp power were systematically optimized and they were found to be 8 l/m
3
and 640 W, respectively. The photodecyanation kinetics was also explored simultaneously and the rate constant was found to be 3.21 × 10
−2
min
−1
at the selected dosage of 8 l/m
3
. This work demonstrates a scalable and facile decyanation technique from steel plant effluent without generation of toxic by-products. |
|---|---|
| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 0944-1344 1614-7499 |
| DOI: | 10.1007/s11356-020-09632-0 |