β-Cyclodextrin modified hydrous zirconium oxide: Synthesis, characterization and defluoridation performance from aqueous solution

Iron–silver oxide nanoadsorbent synthesized by co-precipitation process for fluoride removal from aqueous solution and its adsorption mechanism

“…Linear equations of isotherm models following from below formula: q e =k F (C e ) 1/n (10) q e =(q m k L C e )/(1+k L C e ) (11) q e =q m ln K T +q m ln C e (12) ln q e = ln q m −Dε 2 (13) Where, K F ((mg/g) (L/g) 1 Fig.11 presents the isotherms resulted of the Fluoride adsorption onto Fe-Ag MBON. Langmuir, Freundlich, Temkin and Dubinin-Radushkevich models used to investigate the behavior of Fluoride sorption and determine the maximum adsorption capacity of Fe-Ag MBON at room temperatures in 10 mg/L initial concentration.…”

“…WHO( 1984) reported that > 260 million people in the world consume drinking water with a Fluoride content more than acceptable limits (1.5 mg/ L) and in the tropical countries Fluoride concentration can be as high as 35 mg/L naturally [8]. Among these available approaches, adsorption method is widely used and offers satisfactory results due to its cost effective, high efficiency, simplicity of design, reusability and reliable alternatives [11]. The defluoridation techniques can be mainly classified into three categories, membrane process (verse osmosis, nanofiltration, dialysis and electro-dialysis), chemical process, and adsorption techniques.…”

Synthesis and characterisation of cerium(iv)-incorporated hydrous iron(iii) oxide as an adsorbent for fluoride removal from water

“…11,31 An increase of the rate of a reaction with temperature is associated with the availability of more fractions of adsorbent species with the threshold energy required for effective molecular collision. 34 It was observed that the value of Q t decreased with increasing reaction temperature. The decrease of the value of Q t with increasing temperature indicates the exothermic nature of the adsorption reaction.…”

Montmorillonite-Based Porous Composites as Adsorbents for Removal of Cr(III)-Organic Complexes in Tannery Wastewater

“…Therefore, the mass loss of dry body is presumably due to the decomposition of organic substances such as polyacrylamide and polystyrene spheres in the slurry [28]. In addition, the FTIR spectra of ZrO 2 -MMT and porous adsorbent show an important band at 504 cm −1 corresponding to the vibration of the Zr-O bond [30]. Furthermore, compare with the pristine MMT, the XRD spectra of the porous adsorbent show obvious diffraction peaks at 30.50º and 50.58º (Fig.…”