Competitive adsorption characteristics of fluoride and phosphate on calcined Mg–Al–CO3 layered double hydroxides

Magnetic calcinated cobalt ferrite/magnesium aluminum hydrotalcite composite for enhanced adsorption of methyl orange

“…Finally, the calcined adsorbent was employed for MO adsorption from aqueous solution. clearly observed [19,33,34]. No other characteristic peaks were detected.…”

“…To evaluate the relationship between MO ions and the adsorbent at equilibrium and to seek the maximum adsorption capacity of the adsorbent, the adsorption isotherm data were further fitted by Langmuir, Freundlich and Dubnin-Radushkevich (D-R) models [19,22,41]. The equations are expressed as follows:…”

“…Layered double hydroxides (LDHs) are a class of two-dimensional nanostructured anionic clays [16,17], and have been widely used as adsorbents for the removal of anionic contaminant owing to the high charge density of the sheets and the exchangeability of the interlayer anions as well [18][19][20][21].…”

Synthesis and characterization of a novel Mg–Al hydrotalcite-loaded kaolin clay and its adsorption properties for phosphate in aqueous solution

“…Additionally, it is difficult and time consuming to separate it from solution after adsorption when using it as an adsorbent. Hydrotalcite-like compounds have been demonstrated as highly efficient adsorbents for removing toxic anionic species from wastewater because of its large surface area, high anion-exchange capacity, and high layer charge densities [16,17]. But they are water-insoluble crystalline materials and are poor dispersion in aqueous solution, which affects their adsorption capacity to some extent.…”

Effect of formation pH, molar ratio and calcination temperature on the synthesis of an anionic clay based adsorbent targeting defluoridation

“…Among the adsorbents, application of layered double hydroxides (LDH) (e.g., Mg-Al, Zn-Al, and Mg-Fe, etc.) is proved to be highly promising (Lv et al, 2006;Wang et al, 2007;Mandal and Mayadevi, 2008;Viswanathan and Meenakshi, 2010;Cai et al, 2012;Guo and Reardon, 2012;Kang et al, 2013;Zhang et al, 2013;Moriyama et al, 2014).…”