Water Research Response to Reviewers: Revision Letter and Evidence Map

Reviewer comments and author replies should be visibly different. Bold the complete reviewer comment and use ordinary text for the response, or use another consistent typography requested by the editor. Avoid color as the only distinction.

Dear Editor,

Thank you for the opportunity to revise our manuscript. The revision focuses
on the three issues emphasized in the decision letter: analytical recovery in
the complex matrix, closure of the contaminant mass balance, and the boundary
of the environmental-performance claim.

Reviewer 1, Comment 1: [Paste the complete comment.]

Response: We agree that the original measurements did not close the mass
balance. We added dissolved-phase, sorbed-phase, and transformation-product
measurements at each time point. The revised balance appears in Figure 4 and
Table S6. Methods are on page 10, lines 248-287, and the interpretation is
revised on page 14, lines 391-416.

If one comment contains several experiments or questions, split it into labeled parts without omitting the original wording.

The strongest replies connect measurement validity to mechanism and environmental meaning. Work through that chain explicitly so one added experiment does not leave a different part of the conclusion unsupported.

Analytical quality and controls

When a reviewer questions a concentration change, respond with the measurement chain: calibration range, recovery, blank correction, detection or quantification limit, replicate structure, and matrix effects. Name the control that distinguishes process performance from sampling loss, instrument drift, sorption to labware, or an unmeasured phase.

If the analytical correction changes the estimate, report the new effect directly. Do not preserve the old percentage in the abstract while moving the corrected result to a table.

Mass balance and transformation products

Removal is not equivalent to destruction. A reviewer may be asking whether the target compound moved into sludge, membrane, sorbent, headspace, or an unmeasured product. State which phases were measured and what fraction remains unaccounted for.

If full closure is impossible, stop short of a degradation or mineralization claim. Use "removed from the aqueous phase" when that is what the experiment establishes, and identify the missing fate measurement as a limitation.

Environmental matrix and operating conditions

Performance in ultrapure or synthetic water may not survive ions, natural organic matter, competing contaminants, pH variation, microbial activity, or real hydraulic conditions. Explain which matrix variable the reviewer is testing and whether the paper claims robustness across it.

Add realistic validation when it is central. Otherwise limit the claim to the tested matrix and explain why the result still matters as a mechanism or proof of concept.

Scale, energy, fouling, and reuse

For a process paper, high removal under ideal batch conditions may not answer whether the method is operationally meaningful. A response should distinguish what was measured from what was estimated. Report energy inputs, regeneration or reuse cycles, loading, residence time, fouling, or material loss when those are part of the claimed advantage.

Do not use a rough cost calculation as proof of deployability. Frame it as an initial comparison and show the assumptions.

Environmental safety and by-products

When the process creates transformation products, spent media, concentrated waste, or toxicity uncertainty, answer it directly. New toxicity or by-product data can strengthen the paper, but absence of harm in one assay does not establish environmental safety broadly.

State the endpoint, exposure, and organism tested. Keep the conclusion within that boundary.

Specific boundaries are more persuasive than absolute claims.

If the exact experiment cannot be completed or would not resolve the concern:

1. Restate the uncertainty.
2. Explain why the proposed design is not discriminating or not available.
3. Provide the strongest relevant evidence.
4. Remove or narrow the claim that depends on missing evidence.
5. Add the unresolved question to the limitations.

For example, a reviewer may request a pilot-scale trial when the manuscript is explicitly a mechanistic study. If the paper does not claim deployability, provide operating parameters and scale limitations, remove deployment language, and explain what a pilot study would need to test. Do not imply that a larger beaker is a pilot system.

Reviewer 2, Comment 5: The reported disappearance of the target compound is described as degradation, but sorption and transformation products were not quantified.

Response: We agree that the original wording exceeded the measurements. We added sorbed-phase extraction, tracked the three dominant transformation products, and measured dissolved organic carbon under the same conditions. The revised mass balance accounts for [fraction] of the starting material and appears in new Figure 5A-D and Table S8. Because complete mineralization was not established, we replaced "degraded" with "removed from the aqueous phase with partial transformation" in the title, abstract, Results, and conclusion. Methods appear on page 11, lines 302-351 and the remaining uncertainty is stated on page 16, lines 462-476.

This response succeeds even if the balance is not perfect because it aligns the conclusion with the evidence.

Before resubmission, reconcile:

• units, significant figures, sample labels, and replicate counts
• calibration, recovery, blank, and detection-limit reporting
• material balance totals across figures, tables, and text
• transformation-product names and analytical methods
• operating conditions across main and supplementary experiments
• statistical models and multiple-comparison procedures
• data availability and repository links
• environmental and scale claims against the tested conditions

Water Research's guide says requested revisions should normally be returned within four weeks or may be treated as withdrawn. The decision letter controls your actual deadline. Ask the editorial office early when a necessary experiment cannot be completed in that period.

Across our Water Research pre-submission and revision reviews, three patterns repeatedly make a response look complete while leaving the environmental claim unresolved. These are Manusights observations, not publisher rules.

The Water Research figure reports removal without fate

The revised figure adds time points, replicates, and another treatment condition, but every line still measures only the aqueous target concentration. The reviewer cannot distinguish destruction from sorption, volatilization, sampling loss, or transformation. We test the Water Research response against a phase-and-product map: what entered, what was measured in each phase, what products were sought, and what remains missing. If fate cannot be closed, the manuscript's abstract and conclusion must use a removal claim that names the measured compartment.

The Water Research control is technically present but scientifically weak

Authors often point to a blank that does not isolate the reviewer's alternative explanation. A no-catalyst control may not test photolysis; a sterile control may not separate sorption; a clean-water test may not show matrix suppression. In our review work, we map each Water Research control to the mechanism it excludes. The response should state that mapping explicitly and update the Methods, figure legend, and result interpretation. A longer control list does not help when none targets the actual confounder.

The Water Research revision overstates real-world performance

A single real-water sample or short reuse sequence is often presented as broad robustness. We compare the revised matrix composition, loading, pH, residence time, energy input, reuse conditions, and analytical recovery with the paper's scale and deployment language. When the experiment is a bounded validation, the response should say so. The stronger conclusion names the tested matrix and operating window, identifies the untested scale factors, and preserves the process insight without pretending that laboratory evidence is a field demonstration.

We also check whether the Water Research conclusion quietly changes the comparator. A process tested against an untreated control cannot automatically claim superiority to an established treatment train. The revised table should identify the actual benchmark, use aligned operating conditions where possible, and state when literature values are only contextual. This makes the environmental decision artifact useful without manufacturing a head-to-head result the experiment did not produce.

These failures make a response appear complete while leaving fate, controls, or operating boundaries unresolved in the manuscript that the reviewer must evaluate.

The response adds measurements but not interpretation

Tell the reviewer what the new evidence changes. A new table without a revised mechanism or claim leaves the decision issue open.

The paper uses removal, degradation, and mineralization interchangeably

These terms are not synonyms. Align each one with the measurements and correct every occurrence in the abstract, figures, Results, and conclusion. When only aqueous concentration was measured, do not let a stronger fate claim survive in a different section.

Realistic conditions appear only in the rebuttal

If matrix composition or operating assumptions matter to the answer, put them in the manuscript and figure legend too.

Page and line references point to a marked draft

Generate references from the final clean manuscript. A response that cannot be navigated wastes reviewer attention.

Most major revisions remain conditional, and rejection is still possible when analytical validity is unresolved, mechanism claims exceed the mass balance, or environmental relevance rests on an unrealistic operating window. A polished point-by-point letter cannot compensate for an unmeasured fate pathway or a control that does not test the competing explanation.

Think twice before resubmitting when the central claim is degradation or environmental safety and the revision still measures only disappearance of the parent compound. More targeted evidence or a narrower claim is needed before the response is ready.

• Every editor and reviewer comment is reproduced and answered.
• Each response names the action, result, interpretation, and exact location.
• Controls map to the alternatives they are meant to exclude.
• Removal, transformation, degradation, and mineralization are used precisely.
• Analytical quality and matrix effects are reported consistently.
• Scale and environmental claims stay within the tested operating window.
• Reviewer text and author responses are visually distinguishable.
• The clean manuscript, marked copy, response, figures, and supplement agree.

Use the free revision readiness scan to check whether the evidence map closes the decision letter before uploading the response.

We reviewed the current Water Research guide for authors, publisher revision guidance, rebuttal-craft sources, and the environmental-evidence gaps that recur in Manusights review work. Use this guide when a revision must connect analytical quality, fate, controls, operating conditions, and the environmental conclusion.

Reviewed July 12, 2026.

• Water Research guide for authors
• Elsevier guidance for revising a manuscript
• PLOS Computational Biology: Ten Simple Rules for Writing a Response to Reviewers
• Nature Computational Science guidance on responding to peer review

Official publisher sources support the revision deadline and journal process. The evidence maps and failure patterns are Manusights editorial guidance, not a Water Research decision guarantee.