Enhanced removal of chromium(III) for aqueous solution by EDTA modified attapulgite: Adsorption performance and mechanism

Adsorption performance of GO-doped activated ATP composites towards tetracycline

“…44,47 Peaks near 1607, 1051, 1240, and 1172 cm −1 suggest the existence of a substantial number of oxygen-containing functional groups in the GO interlayer and edge. 28 These various oxygen-containing GO groups would offer active sites for grafting reactions between GO and ATP.…”

“…[23][24][25][26] The adsorption capacity of natural ATP can be improved by high temperature, acid leaching, and organic modication, which will augment its application potential. [27][28][29] Graphene oxide (GO), the oxidation product of graphene, exhibits enhanced chemical activity and hydrophilicity. 30 Under the oxidative stripping effect of concentrated sulfuric acid and potassium permanganate, the original carbon structure is broken by a series of oxygen functional groups, which provides abundant active sites in the basal plane and edge positions.…”

“…23–26 The adsorption capacity of natural ATP can be improved by high temperature, acid leaching, and organic modification, which will augment its application potential. 27–29…”

Cationic Surfactant-Mediated Coagulation for Enhanced Removal of Toxic Metal–Organic Complexes: Performance, Mechanism, and Validation

“…In case Cr(III) is complexed with citrate acid, the two peaks tend to shift to a higher binding energy (587.4 and 577.5 eV, respectively), suggesting the interaction of Cr(III) with hydroxyl or carboxyl groups. 51 However, when the Cr(III)−citrate complexes were mixed with CTAB, both peaks shift back to a lower binding energy at 585.2 and 575.7 eV, implying an increase of the electron density around the Cr atom. Based on the shifts of both N 1s peak and Cr 2p peak, we postulate that the citrate moiety of the Cr(III)−citrate complexes interacts with the positive head group of CTAB through strong electrostatic interactions, weakening the coordination interaction between Cr(III) and citrate.…”

Preparation and MRI performance of a composite contrast agent based on palygorskite pores and channels binding effect to prolong the residence time of water molecules on gadolinium ions

“… 19 PAL is rich in pores and channels due to its unique crystal structure and stacking pattern, including micropores and mesopores within the crystal texture, as well as macropores between particles. 20 A variety of water molecules are bound in the abundance of pores and channels of PAL. These bound water molecules are stable and cannot be completely volatilized even when heated.…”