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Article
Peer-Review Record

Surface Activity of Humic Acid and Its Sub-Fractions from Forest Soil

Sustainability 2021, 13(15), 8122; https://doi.org/10.3390/su13158122
by Shijie Tian 1,2, Weiqiang Tan 1,*, Xinyuan Wang 1, Tingting Li 2, Fanhao Song 2, Nannan Huang 2 and Yingchen Bai 2
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Sustainability 2021, 13(15), 8122; https://doi.org/10.3390/su13158122
Submission received: 9 May 2021 / Revised: 1 July 2021 / Accepted: 12 July 2021 / Published: 21 July 2021
(This article belongs to the Special Issue Environmental Behavior of Nanoparticles)

Round 1

Reviewer 1 Report

You realized an excellent job that will enrich research on humic substances? Congratulations. I have only two observations:

83-Give the type of soil, its N concentration and its carbon content.

245-Why does the model totally underestimate the hydrophilic group?

Author Response

Dear Reviewer:

  Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

Dear Authors:

Please see the attached file of my review comments and questions.

I am looking forward to reviewing revised manuscript with improvement.

Thanks,

Reviewer

Author Response

Dear Reviewer:

  Please see the attachment.

Author Response File: Author Response.docx

Round 2

Reviewer 2 Report

Dear Authors:

It is sad to hear that there is no attachment. Per your request, I attached my review comments for your revision process.

Thanks,

Reviewer

Comments for author File: Comments.pdf

Author Response

Dear Reviewer:

    Please see the attachment.

Author Response File: Author Response.pdf

Round 3

Reviewer 2 Report

Dear Authors:

Please see the attached file of my additional comments.

Sincerely,

Reviewer

Comments for author File: Comments.pdf

Author Response

Dear Reviewer:

     Please see the attachment.

Author Response File: Author Response.docx

Round 4

Reviewer 2 Report

Dear Authors:

Article has been improved a lot with revision process.

Can you add few more reasons why how you selected HA1-HA6 in the lines 95-98?

For the Table 1, authors described in the line 161-162, " According to the C-NMR spectra of HA and its sub-fractions (Table 1)", what did you found? Please add few more description for the Table 1.

For the newly developed regression model in line 272, can you add few more samples to validate it with estimation errors?

In Table 3, please add the results for HA.

In Figure 5, please also add the results for HA.

Please read whole manuscript again to improve any typo and grammar errors before publication.

 Best regards,

Reviewer

 

 

 

 

Author Response

Dear Reviewer:

    Please see the attachment.

 

Author Response File: Author Response.docx

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