Optimization of Solar Corrosion Fenton Reactor for the Recovery of Textile Wastewater: In Situ Release of Fe²⁺

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Authors have tried to prepare solar corrosion Fenton reactor (SCFr) by packing an iron-carbon steel filament . The idea is appreciable. Few suggestions (minor) may take into consideration the improvement of its quality.

The title of the manuscript may be modified. 

The authors are suggested to include the expansion of  HRT in abstract

Figure 5. Efficiency of the SCFr system - error diagram must be included. 

Figure 7 size of the particles not visible

Authors are suggested to include more research outcomes in Conclusion part.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

Comments to Authors:

 

This manuscript describes a Solar Corrosion Fenton Reactor process for treating denim washing textile wastewater. The operating parameters, including hydraulic retention time (HRT), peroxide dosage, and the Fe filament weight/reactor volume ratio (w/v), were optimized. Additionally, the in-situ release of Fe²⁺ from the Fe filament was further investigated. However, several issues should be considered.

1. The title states “Influence of Chlorides on the In-situ Release of Fe,” but the manuscript does not provide results regarding the influence of chlorides in the Solar Corrosion Fenton Reactor. Furthermore, the released iron is Fe²⁺, not Fe. Please clarify this in the text.

 2. The Fe filament weight/reactor volume ratio (w/v) is considered as a parameter in the manuscript. It is recommended to use the surface area of the Fe filament to reactor volume ratio (m²/L) for more comprehensive analysis.

 3. The authors mention the risk of low pH in solutions. Why does the pH of the wastewater decrease after treatment (Table 1).

 4. I do not fully agree with the statement or description that UV radiation causes Fe filament corrosion, leading to the release of Fe²⁺. Please elaborate on the corrosion mechanism and provide the necessary supporting characteristics and explanations.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Comments and Suggestions for Authors

Thank you to the authors for thoughtfully addressing my comments.