Retraction notice to “Synthesis of CaCO₃ supported nano zero-valent iron-nickel nanocomposite (nZVI-Ni@CaCO₃) and its application for trichloroethylene removal in persulfate activated system” [Environ. Res. 245 (2024) 118050] (Environmental Research (2024) 245, (S0013935123028542), (10.1016/j.envres.2023.118050))

This article has been retracted: please see Elsevier policy on article withdrawal (https://www.elsevier.com/about/policies-and-standards/article-withdrawal). This article has been retracted at the request of the Editor. Concerns about figure 1 of this article were raised on PubPeer at https://pubpeer.com/publications/91BC3484424A5E49CE266D353107CB. The authors provided an explanation when requested which was assessed by the editor. The authors however failed to respond to a subsequent request for the raw data files supporting the XRD plot. In the absence of this data, and by inspecting the various versions of the plot in the original and revised manuscripts, the editor agreed with the observation that the plot contains two sections which appear to be identical. Consequently, the Editor has lost confidence in the reliability of the findings presented in this article and is retracting it.