Tuning adsorption capacity of metal–organic frameworks with Al3+ for phosphorus removal: Kinetics, isotherm and regeneration

Al(iii)-based MOF for the selective adsorption of phosphate and arsenate from aqueous solutions

“…S8†), and the DUT-5 surface is negative, the electrostatic interactions are negligible. 37 For arsenate adsorption, the chemical speciation (Fig. S9†) is H 3 AsO 4 (at pH < 2.1), H 2 AsO 4 − (2.1 < pH < 6.7), and HAsO 4 2− (pH > 6.7).…”

“…It is noted that DUT-5 is exceeding to Ce-BDC, 39 HP-UiO-66(Zr), 40 NH 2 -MIL-101(X, X = Al and Fe), 28 Gd-PTA, 41 and Fe–Al-MOF. 37…”

Synthesis of a New Co Metal–Organic Framework Assembled from 5,10,15,20-Tetrakis((pyridin-4-yl) phenyl)porphyrin “Co-MTPhPyP” and Its Application to the Removal of Heavy Metal Ions

“…Samples were taken at specific time intervals (0, 0.5, 1, 2, 3, 4, 5, and 6 h) during the adsorption process and analyzed by atomic adsorption equipment. Kinetics data was analysis by the pseudo-first order and pseudo-second-order kinetic models with the aim to explain if adsorption was carried out by physisorption and chemisorption respectively [ 41 , 42 ], expressed in Equations (4) and (5) [ 40 ], where q e and q t are the adsorption capacity (mg g −1 ) in equilibrium and in contact at time t , respectively, C 0 , C t , and C e are the concentrations of Pb(II) (mg L −1 ) contained in the original solution, after time t and equilibrium, respectively, V is the volume of the solution (mL), and m represents the weight of Co-MTPhPyP (g) where k 1 (1 min −1 ) y k 2 (g mg −1 min −1 ) are the constants in these two models.…”

Role of inner-sphere complexation in phosphate removal by metal–organic frameworks: experimental and theoretical investigation

“…The crystallographic analysis of NH 2 -MIL-101(Fe), NH 2 -MIL-101(Al), and UiO-66-NH 2 were in well agreement with the literature. 14,25,32 Briefly, the characteristic peaks at 7.43°and 8.34°corresponding to (111) and ( 200) crystal faces were obtained in UiO-66-NH 2 . For NH 2 -MIL-101(Al), peaks at 2.4°, 4.01°, 5.8°, 9.09°, 12.1°, and 17.8°described the crystalline structure of the MOF.…”