Magnetically separable Ni0.6Fe2.4O4 nanoparticles as an effective adsorbent for dye removal: Synthesis and study on the kinetic and thermodynamic behaviors for dye adsorption

Review on Dye Removal from Its Aqueous Solution into Alternative Cost Effective and Non-Conventional Adsorbents

“…Weng et al, reported the removal of an acid dye (new coccine) from aqueous solutions using magnetic Fe3O4 nanoparticles [52]. Furthermore, porous Ni0.6Fe2.4O4 nanoparticles has been successfully synthesized and used as an adsorbent in the separation of Congo red dye [53]. These nanoparticles present high adsorption rate compared to other known adsorbents.…”

Study on the kinetic and thermodynamic behaviors of adsorption ciprofloxacin on porous carbon

“…The intra-particle diffusion equation is followed Eqs. (5), the result follows Figure 3 Figure 3-d, although the linear fitting of intra particle diffusion is well exhibited, which found the R2=0.93887, it does not pass through the origin, indicating that intra particle diffusion is not the rate controlling step of the adsorption process and film diffusion and intra particle diffusion occurred simultaneously [11,14]. Adsorption isotherms.The Langmuir isotherm model supposes uniform adsorption on the surface, which is used to depict monolayer adsorption on a surface containing a finite number of identical sites [15].…”

“…But it could change adsorption speed rate and make it quickly reach adsorption equilibrium. Adsorption kinetics.In order to understand the adsorption mechanism of ciprofloxacin onto as-prepared porous carbon, the adsorption process of the ciprofloxacin onto as-prepared porous carbon s was studied as a function of contact time, the result follows the Figure 3-a, obviously, the contact time is the important parameter for the adsorption process [11]. In order to investigate the mechanism of adsorption including mass transport and chemical reaction, the kinetic parameters of the adsorption process were evaluated by using the pseudo-first-order and pseudo-second-order equation.…”

Synthesis of ZnO/CuO nanocomposite immobilized on γ-Al2O3 and application for removal of methyl orange

“…The values of ΔG° obtained in this study are within the ranges of −6 and -0.5 kJ/mol, indicating that the physisorption is the dominating mechanism. The negative value of ΔS° (-36.58 J/mol k) is attributed to the decreased randomness at the solidsolution interface during the adsorption process [37].…”