Evaluation of Portable Rhodamine B Analyzer for Monitoring OH Radical Scavenging Demand in Ultraviolet Advanced Oxidation Processes

Sook-Hyun Nam, Ju-Won Lee, Eun-Ju Kim, Jae-Wuk Koo and Tae-Mun Hwang
Additional contact information
Sook-Hyun Nam: Korea Institute of Civil Engineering and Building Technology—Environment Research Institute, Goyang-si 10223, Korea
Ju-Won Lee: Korea Institute of Civil Engineering and Building Technology—Environment Research Institute, Goyang-si 10223, Korea
Eun-Ju Kim: Korea Institute of Civil Engineering and Building Technology—Environment Research Institute, Goyang-si 10223, Korea
Jae-Wuk Koo: Korea Institute of Civil Engineering and Building Technology—Environment Research Institute, Goyang-si 10223, Korea
Tae-Mun Hwang: Korea Institute of Civil Engineering and Building Technology—Environment Research Institute, Goyang-si 10223, Korea

Sustainability, 2021, vol. 13, issue 23, 1-11

Abstract: A portable OH radical scavenging demand analyzer that can be installed and operated on site was developed to measure water quality indicators that influence the generation of OH radicals from UV/hydrogen peroxide reactions to determine the UV dose and the hydrogen peroxide injection concentration. Rhodamine B (RhB) was used as an indicator for the continuous measurement of the OH radical scavenging demand of four samples with different water quality parameters using the rapid, easy, and real-time UV-Vis spectrophotometer method. The results demonstrated that the estimated rate constant for the RhB color decay rate resulting from direct UV photolysis was low enough to verify its suitability as a probe compound. The mean values of the OH radical scavenging demand for target water samples at different organic concentrations were 20,659 s −1 for plant N, 42,346 s −1 for plant C, 32,232 s −1 for plant Y, and 81,669 s −1 for plant B. Variations in the monitoring results for the target water treatment plants suggest that on-site OH radical scavenging demands should be considered to determine the UV dose and the hydrogen peroxide injection concentration for the UV advanced oxidation process.

Keywords: OH radical; scavenging demand; portable analyzer; Rhodamine probe (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/13/23/13279/pdf (application/pdf)
https://www.mdpi.com/2071-1050/13/23/13279/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:13:y:2021:i:23:p:13279-:d:692023

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().