Magnetic red mud/chitosan based bionanocomposites for adsorption of Cr(VI) from aqueous solutions: synthesis, characterization and adsorption kinetics

Adsorption and desorption behavior of Zn2+ in a flow-through electrosorption reactor

“…In the first 30 min, the system is mainly in the surface diffusion phase, and the adsorption rate is controlled by the internal diffusion step, with a high adsorption rate and strong mass transfer dynamics, and a larger k value represents a faster adsorption rate. 39 In the second 30 min, the surface spots of the activated carbon fiber mat were gradually saturated, the concentration of metal ions in the liquid phase was gradually reduced, the adsorption rate was controlled by the membrane diffusion step together with the internal diffusion step, and the adsorption gradually moved toward the steady-state process. 40 …”

Treatment of fluorinated wastewater with chitosan modified activated sludge lysis ash

“…18,19 The chitosan molecular chain contains a large number of amino groups, which can easily undergo protonation under acidic conditions, making it ligated with metal ions to form chelates and play a role in the adsorption of metal ions, while there are a large number of hydroxyl groups on its branched chain, which also have a certain adsorption effect on uorine ions. 20,21 There are few reports on the use of activated sludge lysis ash in combination with chitosan for the adsorption of uoride in solution. In this study, chitosan was used to modify activated sludge lysis ash to investigate its ability to remove uoride from water, and its removal effect and adsorption mechanism were explored.…”

“…18,19 The chitosan molecular chain contains a large number of amino groups, which can easily undergo protonation under acidic conditions, making it ligated with metal ions to form chelates and play a role in the adsorption of metal ions, while there are a large number of hydroxyl groups on its branched chain, which also have a certain adsorption effect on fluorine ions. 20,21…”