dear editor,<br /><br />In your previous edited docuemnt&nbsp; a few weeks ago, the editor requested me to revise some of your edited sentences. So I revised these as follows. Can you please check and see if these are ok? I must submit it SOON (by early tomorrow morning). <br />thanks in advance.<br /><br /><strong>Responses:</strong> <br />
<p>We greatly appreciate the editors and the reviewers for constructive comments and consideration of our paper. Our responses are below. We will make sure these changes are reflected at the proofread stage when the production team contacts us. Thank you again for your time and consideration. We enjoyed working with you.</p>
<p><strong>&nbsp;Response 1:</strong> yes, we agree with the editors and reviewers. Therefore, we revised it as follows.<br />"&nbsp;And vice versa, the fate of TiO<sub>2</sub> could influence contaminants in terms of their removal<br />and the resultant toxicity, <strong>thereby the deterioration of nano-TiO<sub><span style="font-size: small;">2</span></sub> (e.g., surface modification) can affect the affinity of Cd adsorption along with the toxicity</strong>.<br /><br /></p>
<p><strong>Response 2:</strong> We revised the sentence as follows.<br /><br />" In particular, the dissolution of CuO NPs <strong>increased from 0.93% to 2% </strong>in the presence of EPS at a constant IS (10mM) and is proportional to increasing IS concentrations [78].&nbsp;"<br /><br /></p>
<p><strong>Response 3:</strong> As suggested, we revised the sentence as follows.<br />"In the above study [78], the zeta potential (mV) was two times more negative in the presence of EPS compared to the presence of NOM, and it became even more negative with increasing."<br /><br /></p>
<p><strong>Response 4</strong>: We meant MNPs undergo physical, chemical, or biological transformations. Therefore, we revised the sentence as follows. &ldquo;However, it should be noted that such an effect may be differentiated among environmental parameters (e.g., pH, IS, and temperature), therefore MNPs undergo physical, chemical, or biological transformations.&rdquo;</p>
<p><strong>Response 5</strong>: We changed the heading &ldquo;5.3. Toxic effects of physical morphology on MNPs&rdquo; to &ldquo;Effects of MNPs physical morphology on toxicity. &rdquo; as suggested. Also we revised the 5.4. heading to &ldquo;Effects of interactions with organisms on toxicity of MNPs under environmental conditions.&rdquo; as suggested.</p>
<p><strong>Response 6</strong>: As suggested, we added &lsquo;e.g.&rsquo; in the brackets as follows.<br />As reviewed concerning toxicity and environmental dynamics (e.g., fate, transport, and<br />transformation), the presence of heavy metals (e.g., Hg, Cd, and As) on MNPs (e.g., TiO2, iron oxide) affects the fate of MNPs through adsorption of contaminant molecules and co-precipitation, and that toxicity is increased, especially under the conditions of smaller particle size and resultant higher surface area. </p>
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