Modifying Fe3O4 nanoparticles with humic acid for removal of Rhodamine B in water

Synthesis of Fulvic Acid-Coated Magnetite (Fe₃O₄^–FA) and Its Application for the Reductive Adsorption of [AuCl₄]^–

“…This spectra of FA matched well with the obtained spectra of FA extracted form latosol soil by Jayaganesh and Senthurpandian [29]. The IR spectra of Fe3O4-FA displayed the main absorption bands at 1381 cm -1 which was correspond to C=O stretching of Fe3O4-FA, indicating the carboxylate anion in interaction with FeO surface, as the C=O in free carboxylic acid was above 1700 cm -1 [25][26][27][30][31].…”

“…[30][31]. Briefly, FeSO4.7H2O (2.78 g) and FeCl3.6H2O (5.41 g) were dissolved in a 100 mL of distilled water.…”

Adsorption of Rhodamine B dye from aqueous solution on Irvingia gabonensis biomass: Kinetics and thermodynamics studies

“…The higher negative value of DS°for the uptake of RhB onto DN suggests that RhB was more stable on the DN surface. 57 The negative values of DG°suggest that the sorption process was spontaneous; higher negative values at lower temperature suggest that the sorption process at lower temperature was more spontaneous. Similar trends have been previously reported.…”

Highly efficient removal of methylene blue from aqueous solution by a novel fishing-net effect of manganese oxide nano-sheets

“…Interestingly, the dispersive MnO 2 nano-sheets were precipitated after adsorbing the MB from aqueous solution, indicating that separation of sorbent with MB on it from the solution system will be relatively simple. As the separation of nano-sorbent with adsorbed pollutants from solution has been a challenging step in practice, flocculation, centrifugation, filtration, and magnetic separation (Peng et al 2012) are proposed methods to achieve phase separation. The flocculation or settlsing properties of MnO 2 nano-sheets are likely to stimulate its production and use as a novel nano-sorbent for practical application.…”