Assessment of Remediation of Municipal Wastewater Using Activated Carbon Produced from Sewage Sludge

Round 1

Reviewer 1 Report

 

This study evaluates the potential to synthesize an adsorbent for wastewater remediation 10 application, from anaerobic digestion byproduct via a non-toxic and less energy intensive process. The topic is interesting and the result was well described. Minor revision is suggested. some minor suggestions is shown below:

Q1. delete the repeated word (from).

Q2. the legend in figure 5 is missing. 

Q3. would the Al element can be detected in these sludges (Figure 4)?

 

Author Response

The attached document contains the responses to the comments from the reviewer 1.

Author Response File: Author Response.pdf

Reviewer 2 Report

·         Line 11, “non-toxic and less energy intensive process” be more specific to the point in abstract.

·         Include more numerical importance in abstract.

·         Why Cr(VI) and Cd(II)? What wastewaters laden with these ions. Please elaborate. Why not Cr(III)?

·         What are the current treatments for Cr(VI) and Cd(II)? Their limitations that lead to your work.

·         Literature review should include more performances of adsorbents to remove Cr(VI) and Cd(II) from other studies.

·         Eq 2 can be removed. Simple formula.

·         The experiments involving the adsorption of Cr(VI) and Cd(II) are limited.

·         Characteristics of sludge used as precursor?

·         TGA results may not be useful unless you can link to the performances to adsorb Cr(VI) and Cd(II).

·         What are the industrial Cr(VI) and Cd(II) wastewater? And are those related to your studied concentrations?

·         Conclusions are too long and should be in statement forms of your important findings.

Author Response

The attached document contains the responses to the comments from the reviewer 2.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Well done on revision.