N-doped reduced graphene oxide decorated with Fe3O4 composite: Stable and magnetically separable adsorbent solution for high performance phosphate removal

Pretreatment by recyclable Fe3O4@Mg/Al-CO3-LDH magnetic nano-adsorbent to dephosphorize for the determination of trace F− and Cl− in phosphorus-rich solutions

“…These adsorbents, LDH adsorbents with interlayer anion and non-LDH adsorbents, can all be used to efficiently adsorb PO 4 3À in solution. Compared with most of the adsorbents, the phosphate capacity per unit mass of the synthesized Fe 3 O 4 @Mg/Al-CO 3 -LDH is as high as 76.48 mg P per g, higher than 1.8675-36.9 mg P per g, but somewhat lower 25,31,69,74 than 128-252.88 mg P per g of these four adsorbents. However, they used about 360-4320 min to adsorb phosphates in solution.…”

“…With a further increase in the adsorption time, the adsorption of PO 4 3À slows down to the equilibrium stage, until the residual PO 4 3À concentration nally reached 48.1 mg P per L aer 120 min adsorption. According to the formula for phosphate adsorption capacity, 74 as stated in Section 2.3, the capacity of Fe 3 O 4 @Mg/Al-CO 3 -LDH is 83.04 mg P per g for 120 min adsorption. Even for 5 min adsorption, it is still as high as 76.48 mg P per g. Thus, the optimized adsorption time was chosen to be 5-60 min for the solution using 50 mg Fe 3 O 4 @Mg/Al-CO 3 -LDH.…”

Sonochemical activation-assisted biosynthesis of Au/Fe3O4 nanoparticles and sonocatalytic degradation of methyl orange

“…In this sense, is possible to affirm that the Pseudo second order model at lower concentration, describe the MO Sonocatalytic degradation phenomena. In general form, the PSO model suggests an exchange ionic between the adsorbent and the adsorbate and implicitly, a chemisorption process [51] , [52] .…”

Unraveling the Phosphorus Adsorption Mechanisms in Three-dimensional Reduced Graphene Oxide Materials

“…More recently, graphene-based materials functionalized with different compounds have been successfully applied to phosphate adsorption from water. Highlighting studies carried out with composite materials, reduced graphene oxide doped with N and decorated with Fe 3 O 4 , zirconium-loaded reduced graphene oxide, triazine functionalized graphene oxide anchored alginate bead, cellulose acetate nanofiber membrane modified with graphene oxide/sodium dodecyl sulfate, alumina decorated graphene oxide, lanthanum-doped aminated graphene oxide@aminated chitosan microspheres, among others, showing excellent performance for all tested materials. − However, despite the excellent performance obtained by two-dimensional (2D) graphene materials and their extraordinary surface-to-volume ratio, two main problems hinder their application: (i) van der Waals interactions between graphene sheets cause their aggregation, which reduces the superficial area and (ii) for applications in aqueous systems, graphene sheets can be carried away, leading to material loss and possible ecotoxicological damage. One alternative is using three-dimensional (3D) materials based on graphene.…”