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Polymers
Volume 13
Issue 15
10.3390/polym13152453
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Article
Peer-Review Record

Pectin/Activated Carbon-Based Porous Microsphere for Pb2+ Adsorption: Characterization and Adsorption Behaviour

Polymers 2021, 13(15), 2453; https://doi.org/10.3390/polym13152453
by Ri-si Wang 1, Ya Li 2, Xi-xiang Shuai 1,2, Rui-hong Liang 1, Jun Chen 1,* and Cheng-mei Liu 1,*
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Polymers 2021, 13(15), 2453; https://doi.org/10.3390/polym13152453
Submission received: 27 June 2021 / Revised: 6 July 2021 / Accepted: 7 July 2021 / Published: 26 July 2021
(This article belongs to the Topic Multiple Application for Novel and Advanced Materials)

Round 1

Reviewer 1 Report

Authors should check the manuscript because sometimes they write absorption and sometimes adsorption which is a completely different phenomenon.

In the fig.6 caption authors made a mistake - B is the removal % rate and C is the Langmuir isotherm model.

Please kindly add citation:

https://doi.org/10.3390/ma13122782

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

Journal: Polymers

Manuscript Number: polymers-1295072

Type of the Paper: Article

Title: Pectin/activated carbon based porous microsphere for Pb2+ adsorption: Characterization and adsorption behavior

The authors have described the preparation of pectin/activated carbon-based porous microsphere and the prepared microsphere was utilized for Pb2+ adsorption. The paper is well-written and organized. Thus, I suggest the manuscript for publication after considering the below points.

1) There are many reports available regarding the adsorption of heavy metal ions using porous materials. Thus, the novelty and advantages of this method should be present in the last part of the introduction section.

2) The results with increasing the activated carbon showed good results. What will be the adsorption rate using just activated carbon? In the paper adsorption using pectin are showed but there no information just will activated carbon. Also increasing the content of activated carbon in the microsphere increase the adsorption results.

3) The scale in the SEM images is not visible. Table or information should be added reading the size of the microsphere because the SEM images reveal the increase in size but there is no information about this.

4)The adsorption results in changes with pH values that need more explanation. Why the adsorption between 4.0 and 6.0 increase?

5) Why the removal rate (%) decreases with initial Pb2+ concentration?

Author Response

Please see the attachment.

Author Response File: Author Response.docx

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