Magnetic nanocomposites based on Zn,Al-LDH intercalated with citric and EDTA groups for the removal of U(vi) from environmental and wastewater: synergistic effect and adsorption mechanism study

Abstract

The efficient removal of U(vi) ions from contaminated waters was shown by novel magnetic nanocomposites based on magnetite and Zn,Al-layered double hydroxides intercalated with citric and EDTA groups (Fe3O4/Zn,Al-LDH/Cit and Fe3O4/Zn,Al-LDH/EDTA).

Layered Double Hydroxides as the Unique Product of Target Ionic Construction for Energy, Chemical, Foods, Cosmetics, Medicine and Ecology Applications

“…The same LDHs were used to extract U 6 + . [183][184][185] It should be noted that there is a contradiction in works based on the extraction of cations from aqueous solutions using LDH intercalated with complex anions. The authors of these works write that the extraction of cations is based on the complexation of the extracted cations with intercalated anions.…”

Identification of oxygen sites in β-ketoenamine-linked covalent organic frameworks for highly efficient uranium adsorption through experimental and theoretical studies

“…[1][2][3] However, the environmental pollution associated with the development of nuclear energy, such as groundwater pollution from nuclear fuel reprocessing and radionuclide waste leakage from nuclear power plant accidents, cannot be ignored. [4][5][6][7] As the primary source of the nuclear industry, the soluble and mobile uranium has been a serious threat to ecological balance and human health. 6,7 Therefore, it is necessary to efficiently reduce and recover uranium from wastewater.…”

“…[4][5][6][7] As the primary source of the nuclear industry, the soluble and mobile uranium has been a serious threat to ecological balance and human health. 6,7 Therefore, it is necessary to efficiently reduce and recover uranium from wastewater.…”

“…The results showed that the adsorption capacity of U(VI) ions by DQTP COF exhibited positive concentration-dependent trends, which could be ascribed to the formation of a concentration gradient between the U(VI) ions and the surface of DQTP COF. However, as the adsorption sites became saturated, the increase in the adsorption capacity gradually decelerated and eventually a dynamic balance was achieved, as a result of the maximum adsorption capacity of 517.62 mg g −1 at T = 298 K. The isothermal adsorption model of Langmuir (eqn (6)) and Freundlich (eqn (7)) models were used to simulate the adsorption process of DQTP COF:…”

A rationale for the rapid extraction of ultra-low-level uranyl ions in simulated bioassays regulated by Mn-dopants over magnetic nanoparticles

“…Since these nanoparticles have a high surface area, as well as good pore size, many metal ions and dyes can be sorbed on the surface and occupy pores or lattice sites of nanoparticles. [36][37][38][39][40] A plethora of nanoparticles, magnetic and using different supports, have been utilised for the sorption of actinide materials like uranyl ions from the solution. [41][42][43] Such incorporated/adsorbed NPs can be attracted towards the magnetic eld and can be used for the removal of toxic materials from the environment as has been discussed for the separation of ultra-low level (ULL) uranyl ions present in urine following internal contamination.…”