Show simple item record

AuthorAbeer, Al-Bsoul
AuthorAl-Shannag, Mohammad
AuthorTawalbeh, Muhammad
AuthorAl-Taani, Ahmed A.
AuthorLafi, Walid K.
AuthorAl-Othman, Amani
AuthorAlsheyab, Mohammad
Available date2024-03-04T04:10:48Z
Publication Date2020-01-15
Publication NameScience of The Total Environment
Identifierhttp://dx.doi.org/10.1016/j.scitotenv.2019.134576
ISSN00489697
URIhttps://www.sciencedirect.com/science/article/pii/S004896971934567X
URIhttp://hdl.handle.net/10576/52610
AbstractThe treatment of olive mill wastewater (OMW) in Jordan was investigated in this work using ultrasound oxidation (sonolysis) combined with other advanced oxidation processes such as ultraviolet radiation, hydrogen peroxide (H2O2) and titanium oxide (TiO2) catalyst. The efficiency of the combined oxidation process was evaluated based on the changes in the chemical oxygen demand (COD). The results showed that 59% COD removal was achieved within 90 min in the ultrasound /UV/TiO2 system. A more significant synergistic effect was observed on the COD removal efficiency when a combination of US/UV/TiO2 (sonophotocatalytic) processes was used at low ultrasound frequency. The results were then compared with the COD values obtained when each of these processes was used individually. The effects of different operating conditions such as, ultrasound power, initial COD concentration, the concentration of TiO2, frequency of ultrasound, and temperature on the OMW oxidation efficiency were studied and evaluated. The effect of adding a radical scavenger (sodium carbonate) on the OMW oxidation efficiency was investigated. The results showed that the sonophotocatalytic oxidation of OMW was affected by the initial COD, acoustic power, temperature and TiO2 concentration. The sonophotocatalytic oxidation of OMW increased with increasing the ultrasound power, temperature and H2O2 concentration. Sonolysis at frequency of 40 kHz combined with photocatalysis was not observed to have a significant effect on the OMW oxidation compared to sonication at frequency of 20 kHz. It was also found that the OMW oxidation was suppressed by the presence of the radical scavenger. The COD removal efficiency increased slightly with the increase of TiO2 concentration up to certain point due to the formation of oxidizing species. At ultrasound frequency of 20 kHz, considerable COD reduction of OMW was reported, indicating the effectiveness of the combined US/UV/TiO2 process for the OMW treatment.
SponsorThe authors would like to extend their sincere gratitude to the Scientific Research Support Fund at Amman, Jordan, for its funding this research, project number WE/1/16/20.
Languageen
PublisherElsevier
SubjectOlive mill wastewater
Titanium oxide catalyst
Sonophotocatalytic
Oxidation
Ultrasound
Radicals
COD
TitleOptimal conditions for olive mill wastewater treatment using ultrasound and advanced oxidation processes
TypeArticle
Volume Number700
ESSN1879-1026
dc.accessType Open Access


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record