In 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.
Keywords: Alzheimer’s disease; aluminum residuals; coagulation; drinking water treatment; natural coagulants; neurotoxicity.