Enhanced adsorption of Acid Red 14 by co-assembled LDH/MWCNTs nanohybrid: Optimization, kinetic and isotherm

Preparation of aminated nanoporous nanofiber by solvent casting/porogen leaching technique and dye adsorption modeling

“…The Langmuir model yielded the best fit with the highest R 2 value of 0.994, thus the Langmuir isotherm was the most suitable equation to describe The isotherm data showed that ANPAN nanofiber has homogeneous surface sites to adsorb DB78. In addition, the formation monolayer coverage of DB78 molecule at the outer surface of the ANPAN nanofiber occurred [44][45][46][47][48] .…”

“…The most studied adsorption isotherms are the Langmuir, Freundlich, and Temkin isotherms [ 46 -50 ]. The Langmuir equation is valid for monolayer adsorption on an adsorbent surface with a finite number of identical sites and is expressed as [46,47] : of site occupation [48] . The isotherm is expressed as:…”

Comparative study of removal of reactive dye by LDHs: The effect of cation variety

“…To evaluate the Reactive Red 43 removal performance, the adsorption capacity of LDHs was compared with other different adsorbents (Table ). As can be seen from Table , the adsorption capacity of four cationic LDH for Reactive Red 43 in this study was higher than those of the other adsorbents .…”

“…To evaluate the Reactive Red 43 removal performance, the adsorption capacity of LDHs was compared with other different adsorbents ( Table 3). As can be seen from Table 3, the adsorption capacity of four cationic LDH for Reactive Red 43 in this study was higher than those of the other adsorbents [40][41][42][43][44]. Figure 8 shows the removal efficiency of the RR43 dye by four cationic LDH versus the adsorption time at various initial dye concentrations.…”

“…Where C e (mg L −1 ) is the equilibrium concentration of adsorbate, qe is the amount of adsorbed dye at equilibrium concentration C e , q m is the maximum monolayer adsorption capacity (mg g −1 ), and k L is the Langmuir constant that refers to the adsorption energy. The values of k L and qm were computed from the slope and intercept of the Langmuir plot of 1/ q m versus 1/ C e . The value of k L shows the property of the isotherm to be unfavourable ( k L > 1), linear ( k L = 1), favourable (0 < k L < 1), or irreversible ( k L = 0).…”