Degradation of malachite green by g-C3N4-modified magnetic attapulgite composites under visible-light conditions

Fenton-like Degradation of Methylene Blue on Attapulgite Clay Composite by Loading of Iron–Oxide: Eco-Friendly Preparation and Its Catalytic Activity

“…A-ATP@Fe 3 O 4 showed the largest BET surface area and the lowest pore size among the samples under investigation. Relative to the values given in the literature, it is noteworthy that the equilibrium time and equilibrium capacity of A-ATP@Fe 3 O 4 were found to be outstanding and promising [ 45 , 46 ]. In addition, we further studied the adsorption mechanism using the pseudo-first-order [ 35 ] given in Equation (3) and the pseudo-second-order given in Equation (4) with corresponding parameters presented in Table 3 : where q e (mg·g −1 ) and q t (mg·g −1 ) are the adsorbed amounts of MB at equilibrium and at time t (min), k 1 (min −1 ), and k 2 (mg·g −1 min −1 ) are the adsorption rates for the pseudo-first and pseudo-second order models.…”

Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

“…Using attapulgite (ATP) as carrier, Fe3O4 and g-C3N4 were grafted onto ATP, and the surface was then modified with polyethyleneimine (PEI) to produce photocatalyst ATP-Fe3O4-g-C3N4-PEI, which was used in the treatment of a Malachite Green-bearing wastewater [133]. Electron paramagnetic resonance analysis confirmed that the nanocomposite generated hydroxyl radicals (•OH) and superoxide radicals (•O2 -) which degraded the dye.…”