| dc.creator |
Daidai, Masakazu |
|
| dc.creator |
Kobayashi, Fumihisa |
|
| dc.creator |
Mtui, Godliving Y. S. |
|
| dc.creator |
Nakamura, Yoshitoshi |
|
| dc.date |
2016-09-21T16:20:58Z |
|
| dc.date |
2016-09-21T16:20:58Z |
|
| dc.date |
2007-04 |
|
| dc.date.accessioned |
2018-03-27T09:00:44Z |
|
| dc.date.available |
2018-03-27T09:00:44Z |
|
| dc.identifier |
Daidai, M., Kobayashi, F., Mtui, G. and Nakamura, Y., 2007. Degradation of 2, 4-dichlorophenoxyacetic acid (2, 4-D) by ozonation and TiO2/UV treatment. Journal of chemical engineering of Japan, 40(4), pp.378-384. |
|
| dc.identifier |
http://hdl.handle.net/20.500.11810/4064 |
|
| dc.identifier |
org/10.1252/jcej.40.378 |
|
| dc.identifier.uri |
http://hdl.handle.net/20.500.11810/4064 |
|
| dc.description |
Full text can be accessed at
https://www.jstage.jst.go.jp/article/jcej/40/4/40_4_378/_article |
|
| dc.description |
The degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) was conducted by ozonation, TiO2/UV treatment only, and two-stage treatment of ozonation followed by TiO2/UV treatment. In the case of ozonation, 2,4-D could be degraded and vanished within about 10 min at pH 9 and 20°C, but the TOC value was reduced by only about 40% by 30 min ozonation. In the case of TiO2/UV treatment, about 5 d was needed for complete disappearance of 2,4-D at pH 5 and 20°C. On the other hand, when the two-stage treatment of ozonation plus TiO2/UV treatment was applied, 90% decline of TOC was achieved within about 20 h, i.e., 30 min ozonation and 20 h TiO2/UV treatment thereafter. Furthermore, 90% of chloride ions in 2,4-D were liberated by the two-stage treatment. From a bioassay test of the two-stage treated water by the use of an osteoclasts of goldfish scales or Daphnia magna, it was found that 2,4-D was degraded into harmless substances with little estrogen activity and toxicity. |
|
| dc.language |
en |
|
| dc.subject |
2,4-D |
|
| dc.subject |
Ozone |
|
| dc.subject |
TiO2/UV |
|
| dc.subject |
Osteoclast of Goldfish Scale |
|
| dc.subject |
Daphnia magna |
|
| dc.title |
Degradation of 2,4-Dichlorophenoxyacetic Acid (2,4-D) by Ozonation and TiO2/UV Treatment |
|
| dc.type |
Journal Article |
|