“…One of the most promising methods is the ion exchange by the use of minerals as adsorbents on a solid substrate, due to the low energy input, the easy technology (Zheng & Wang, 2010), the economic, and the environmental sustainability (Bekiari et al, 2017; Gefenienė et al, 2006; Marañón et al, 2006; Moussavi et al, 2011). The preferable minerals for such applications are the zeolites (Moussavi et al, 2011; Rožić et al, 2000; Shinzato et al, 2020; Wu et al, 2018) and the clay minerals (Alshameri et al, 2018) due to their specific properties, high adsorption capacity, high availability all over the world, and low cost (Bekiari et al, 2017). The clay minerals that have been tested until now for the ammonium–wastewater treatment are kaolinite (Alshameri et al, 2018; El‐Shafey et al, 2014), halloysite (Alshameri et al, 2018; Bekiari et al, 2017), clay minerals from smectite group (Alshameri et al, 2018; Angar et al, 2017; Zadinelo et al, 2015), vermiculite (Alshameri et al, 2018; Lv et al, 2013; Shinzato et al, 2020), as well as fibrous clay minerals (Alshameri et al, 2018; Balci, 2004; Fei et al, 2012; Ji et al, 2011; Lv et al, 2013; Wang et al, 2014; Zhongwei et al, 2015).…”