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<p>In a recent article in this journal, Mohery et al. [<i>WASP</i> (2025) 236:484] synthesized a new aminophosphonate with a symmetrical structure. They tested it as a sorbent for Cu(II) and examined its microbiological properties. Here, we discuss the interpretation of the original article's experimental results. First of all, we demonstrate that the speciation of Cu(II) under the chosen experimental conditions (pH = 3.5) is erroneous. Regarding the modeling of sorption experiments, the use of kinetic or isotherm equations in linear form is not recommended, as it can lead to errors in parameter determination. Unfortunately, the original authors relied on secondary sources with erroneous equations, casting doubt on the validity of the fitted parameters. Furthermore, the two-step nature of their isotherm curve should have been analyzed using a more appropriate model rather than classical equations. We determined the lipophilicity parameter Log<i>P</i> = 4.75 for the aminophosphonate, which allows us to discuss its behavior. However, the microbiological techniques (anti-oxidant, anti-bacterial assays) described in the original article lack sufficient methodological detail, as the results are presented mainly as images of the inhibition zones. Further experimental validation is needed to reach solid conclusions given the low activities detected. These errors and inaccuracies require the authors of the original article to publish a correction. We acknowledge the originality and interest of the article and offer this comment as constructive criticism. Our aim is to contribute to the scientific dialogue and enhance the clarity and applicability of the authors’ findings.</p>

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Comment on the paper “Eco‑Friendly Copper Adsorption by a Novel Bis‑Aminophosphonate” by Mohery et al. [Water Air Soil Pollut (2025) 236:484]

  • 期刊论文

  • 发表日期：

    2025年11月22日

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  • Jean-Claude Bollinger,
  • Houria Alioui,
  • Omar Bouras,
  • Khim Hoong Chu

摘要

In a recent article in this journal, Mohery et al. [WASP (2025) 236:484] synthesized a new aminophosphonate with a symmetrical structure. They tested it as a sorbent for Cu(II) and examined its microbiological properties. Here, we discuss the interpretation of the original article's experimental results. First of all, we demonstrate that the speciation of Cu(II) under the chosen experimental conditions (pH = 3.5) is erroneous. Regarding the modeling of sorption experiments, the use of kinetic or isotherm equations in linear form is not recommended, as it can lead to errors in parameter determination. Unfortunately, the original authors relied on secondary sources with erroneous equations, casting doubt on the validity of the fitted parameters. Furthermore, the two-step nature of their isotherm curve should have been analyzed using a more appropriate model rather than classical equations. We determined the lipophilicity parameter LogP = 4.75 for the aminophosphonate, which allows us to discuss its behavior. However, the microbiological techniques (anti-oxidant, anti-bacterial assays) described in the original article lack sufficient methodological detail, as the results are presented mainly as images of the inhibition zones. Further experimental validation is needed to reach solid conclusions given the low activities detected. These errors and inaccuracies require the authors of the original article to publish a correction. We acknowledge the originality and interest of the article and offer this comment as constructive criticism. Our aim is to contribute to the scientific dialogue and enhance the clarity and applicability of the authors’ findings.