Preparation of Graphene Oxide Composites and Assessment of Their Adsorption Properties for Lanthanum (III)

Round 1

Reviewer 1 Report

This manuscript reported the fabrication of graphene oxide composites including GOH/DCS and GOH/DMCS in order to remove lanthanum La(III). It basically demonstrated that GOH/DMCS can achieve the maximum adsorption capacity of 302.51 mg/g and remain 74 % of this capacity after four cycles. I thought it is an original work and provides a different thinking from literature. This approach may attract other scholars to work along this direction and finally find better compounds. Detailed SEM, FTIR, XRD, zeta potential, magnetic hysteresis loop and adsorption capacity results were presented and discussed. In my opinion, the results are positive with interesting inputs. In general, this paper is clear and well written. Also the conclusions are consistent with the experimental evidence. Hence, I recommend this manuscript to be published in Coatings.

Author Response

Many thanks to the reviewer for your recognition of this paper.

Reviewer 2 Report

The manuscript entitled "Preparation of graphene oxide composites and assessment of their adsorption properties for lanthanum (III)" is well-organized and addresses the currently important issue of RRE and wastewater treatment. I think that the paper is suitable for publication in Coatings after revision and completion. The detailed comments are given below.

• For clarity, the abstract should be supplemented by an explanation of the abbreviations: GOH/DCS and GOH/DMCS,
• Please include in the 'introduction' section examples of other sorbents widely used for the adsorption of La, and highlight the problem of RRE adsorption from wastewater.
• The figure resolution should be satisfied with the requirements of Coatings. Please double-check.
• The mechanism of La(III) sorption on GOH/DCS and GOH/DMCS composites should be explained and highlight.
• Why did the authors choose GO, CS and DE as composite material components?
• Didn't GOH/DCS and GOH/DMCS decompose after several sorption/desorption cycles?
• ‘2.4. Adsorption experiment’: What was the La(III) compound used for sorption experiments?; line 139: ‘arsenazo III spectrophotometer was measured’ - what does it mean?. Please follow the article: ‘Adsorption of La, Eu and Lu on raw and modified red clay’ J Radioanal Nucl Chem (2014) 301:33–40, DOI 10.1007/s10967-014-3111-4 - for clarifications and explain in detail, how the La(III) concentration was measured, on what apparatus and using what wavelength.
• ‘5.2 adsorption isotherm’: line 179 ‘MB’, line 184 ‘methylene blue’ - Is this a description of the sorption isotherms of La(III) or of the dye?
• References 11-13 (line 638-643), they are assigned to number 11-13 or 23-25?.

Author Response

Thank you very much for your professional and careful review

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Author Response File: Author Response.docx

Reviewer 3 Report

See the respected file.

Comments for author File: Comments.docx

Author Response

Thank you very much for your professional and careful review. Many valuable opinions you put forward are worth my deep consideration and study

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Author Response File: Author Response.docx

This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.