Alumina nanoparticles immobilization onto the NaX zeolite and the removal of Cr (III) and Co (II) ions from aqueous solutions

Highly efficient low‐cost zeolite for cobalt removal from aqueous solutions: Characterization and performance

“…of stirring rate, 0.9 mm of particle size, 12 g/L of clinoptilolite dosage, and 5.5 of initial pH) was 3.4 mg/g while at 298 K, with the same conditions, the adsorption capacity was 2.9 mg/g (endothermic process). Although the experimental conditions of the adsorption capacities studies reported in the bibliography are not the same than the corresponding to this work, Table summarized some values for the adsorption of Co 2+ on different zeolites for . As it can be observed, the adsorption capacity is quite similar values of initial concentration.…”

“…Additionally, several authors have researched the cobalt adsorption using other zeolites like NaX, zeolite synthesized from fly ash, 13X, or cancrinite. [24][25][26][27] As can be observed, in the last works published about cobalt removal on zeolite, it does not exist a complete cobalt adsorption process variables effect study The novelty of this work is to carry out a broad study about the characterization of the clinoptilolite and the variables which affect cobalt adsorption process, to establish the basis for the next works: adsorption of other strategic metals such as gallium and indium, even less studied, in more realistic systems such as real wastewaters matrix and continuous experimental arrangement. The clinoptilolite employed in this work is a commercial zeolite with a wide variety of size fractions which allows the disposal of the adsorbent in a bed to work in continuous mode procedure.…”

The removal of Cr (III) and Co (II) ions from aqueous solution by two mechanisms using a new sorbent (alumina nanoparticles immobilized zeolite) — Equilibrium, kinetic and thermodynamic studies

“…Alumina nanoparticles (purity N 99%, particle size = 20 nm, specific surface N 160 m 2 /g) were purchased from Nano Pars Lima company. Methods for the preparation of ANIZ have been discussed in the previous paper [41]. The alumina content of the prepared ANIZ by the physical and sol-gel methods was 82.98 mg·g − 1 and 95.85 mg·g − 1 respectively.…”

“…ANIZ was prepared by immobilization of alumina nanoparticles onto the NaX zeolite granules by a physical as well as a sol-gel method. The preparation and characterization of ANIZ have been reported in the previous paper [41]. The removal capacity of Cr (III) and Co (II) was compared for three sorbents.…”

Response surface methodology approach for optimization of simultaneous dye and metal ion ultrasound-assisted adsorption onto Mn doped Fe3O4-NPs loaded on AC: kinetic and isothermal studies

“…The maximum sorption capacity Q max (mg g -1 ) is great criterion for judgment useful in scale-up 540 considerations. 12,26,30,[63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80] 12,26,30,[63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80] …”