Ivy, AfiaDubrawksi, KristianDorea, Caetano C.2022-11-192022-11-1920212021Ivy, A., Dubrawksi, K., & Dorea, C. (2021). “Comment on Khairul Zaman et al. Ecofriendly coagulant versus industrially used coagulants: Identification of their coagulation performance, mechanism and optimization in water treatment process. Int. J. Environ. Res. Public Health 2021, 18, 9164.” International Journal of Environmental Research and Public Health, 18(22), 12250. https://doi.org/10.3390/ijerph182212250https://doi.org/10.3390/ijerph182212250http://hdl.handle.net/1828/14505In a recent contribution by Zaman and colleagues, a few issues were noted on the justification of their study, which performed a comparative assessment of chitosan as a proposed alternative to aluminum-based coagulants for drinking water treatment applications. We have provided further clarity around such issues, which apply to other studies on the same theme.enaluminum residualsAlzheimer's diseasecoagulationdrinking water treatmentnatural coagulantsneurotoxicityCAMTECArticle