Efficient adsorption of methylene blue on novel triple-nanocomposites of potassium Kappa-carrageenan, calcium alginate and nanohydroxyapatite obtained from sea scallop shells

Enhanced adsorption of lead (II) ions onto cellulose nanoparticles/chitosan composite based on loofah sponge: kinetic and thermodynamic studies

“…The values of 1/n ranged between 0.2645 and 0.5212 (0 ˂ 1/n ˂ 1), illustrating favorability of lead adsorption [50]. The values of n (˃1) confirm the physical characteristics of the adsorption process [51].…”

“…The interactions between lead ions and CZC surface were mostly physical binding forces. Chloroform and NaOH had the lowest desorption percentages due to their low concentrations of positively charged protons, while HNO 3 and HCl had the maximum desorption efficiency due to the increased quantity of protons in acidic media based on the acidity constant, increasing the electrostatic repulsion between lead ions and protonated sites on CZC surface [51]. The reusability of CZC throughout five cycles of lead ion adsorption/desorption is shown in Fig.…”

Utilizing modified cellulose nanoparticles derived from a plant loofah sponge to improve the removal of diazinon insecticide from an aqueous medium

“…The linear Temkin form ( eqn (12) ) and Dubinin–Radushkevich ( eqn (15) ) isotherm models are represented as follows: 28 q e = A ln K T + A ln C e , ln q e = ln q DR − K DR ε 2 , where A , T , and R constants are the adsorption heat, absolute temperature in Kelvin, and gas adsorption constant (8.314 J mol −1 K −1 ), respectively. b T (J mol −1 ) and K T (L g −1 ) are related to the Temkin constants.…”

Fabrication of silica/calcium alginate nanocomposite based on rice husk ash for efficient adsorption of phenol from water

“…Conversely, b tendency (RS > AG > RSG) shown the faster surface coverage of RS with phenolate ion. 46 Correlation coefficients R 2 (0.8820-0.9788) indicated the best tting of Weber-Morris (intra-particle diffusion) model for phenol adsorption onto the prepared adsorbents. The intercept (C) values show that the intra-particle diffusion effect was not the only factor affecting phenol adsorption.…”