Degradation of Chloramphenicol Using UV-LED Based Advanced Oxidation Processes: Kinetics, Mechanisms, and Enhanced Formation of Disinfection By-Products
and Yulin Tang 1,2,*Round 1
Reviewer 1 Report
I have a general comment on the explanations of the large quantity of abbreviations. Although all abbreviations are explained in the text one has to go back each time and look for it since not in all cases they are explained again. A clear list of abbreviations at the end of the paper will give easier access to them. SOme examples of the problem:
1. In the "analysis" description in materials methods "gas chro-141 matography/mass spectrometry (GC/MS) (Shimadzu-QP2010, Kyoto, Japan) were used to evaluate TCM, DCAN, and TCNM concentrations according to USEPA Method 524.2". One has to go back to see again what are the abbreviations.
2. In the materials and methods we have: power output of 2.40 mW/cm2
after that in Fig. 2 we have "I0 = 2.4 mW/cm2."??? Again abbreviations are not clear enough
Another comment: Fig. 2 - "a) y 150 axis is /C0;" C is lacking
Was only one CAP conc. (5 mg/l) checked?
"When compared to trials using oxidants and UV-LED only, the improvement in CAP degradation performance could be attributed to the generation of reactive radicals such as ·OH, SO4·- and reactive chlorine species (Cl·, Cl2·-, ClO·) by the three UV-LED based AOPs". Have the mentioned radicals been identified or is it an assumption based on litterature?
Author Response
Please see the attachment.
Author Response File: 
Author Response.docx
Reviewer 2 Report
The purpose of the paper was to study the degradation of chloramphenicol (CAP) using three UV-LED based advanced oxidation processes (AOPs), UV-LED/persulfate (UV-LED/PS), UV-LED/peroxymonosulfate (UV-LED/PMS), UV- LED/chlorine (UV-LED/NaClO). Results of the study may have important application in the field of use of advanced oxidation process for treating toxic organics. Authors may wish to consider the following in revising of their manuscript.
- Please discuss the limitations of the proposed treatment method.
- Please comment whether intermediates formed from the proposed treatment process are more toxic compared to intermediates formed from other treatment processes reported in the literature.
- Please comment on whether there is energy saving in the proposed treatment process.
- Pure chemical compound was used in preparing synthetic wastewater in the study. Please comment on the effect of organic and inorganic compounds present in real wastewater on the treatment performance.
- Please comment on the pre treatment requirement for the proposed treatment process.
- Study was carried out in bench scale. Please comment on the scale up factor for full scale application.
Author Response
Please see the attachment.
Author Response File: Author Response.docx
