Preparation of core-shell structure Fe3O4@C@MnO2 nanoparticles for efficient elimination of U(VI) and Eu(III) ions

Efficient elimination of organic and inorganic pollutants by biochar and biochar-based materials

“…It is well known that the sorption is one of the most efficient methods to eliminate metal ions and/or radionuclides from large volumes of aqueous solutions or to solidify the metal ions on solid particles after metal ion's sorption (Dai et al 2019;Duan et al 2019;Liu et al 2019b). However, the desorption of metal ions should be considered if the environmental conditions are changed and the metal ions are released from solid particles to form free metal ions again.…”

A bifunctional robust metal sulfide with highly selective capture of Pb2+ ions and luminescence sensing ability for heavy metals in aqueous media

“…The results from the sorption studies indicate that the process proceeds via a rapid ion exchange between the labile H + and Pb 2+ species (see eqn (5)). The capture of Pb 2+ by p-UCR-20 is facilitated by the highly porous structure of this material and the presence of numerous S 2− ligands.…”

“…The presence of heavy metals in aqueous ecosystems poses a major threat, due to their high toxicity, non-biodegradability, discharge and accumulation in living beings. [1][2][3][4][5] This issue is everincreasing in less developed countries where many industrial residues containing toxic heavy metals are often released into the environment without suitable purification, due to the lack of proper regulations and the high cost of the treatment technologies. Lead (Pb), owing to its physical properties including high strength, high pliability and low melting point, is one of the most desirable industrial raw material.…”

MnO2‐Based Materials for Environmental Applications

“…More importantly, MnO 2 particles have more hydroxyl groups on their surface and a large number of negative charge functional groups, inducing acceptable adsorption performances for cationic heavy metals. [ 227,331 ] Therefore, in recent decades, there has been great interest in using MnO 2 as an adsorbent for the removal of various heavy metals from water aquatic systems, including Cr(VI), [ 332–334 ] Pb(II), [ 312,335–338 ] Cd(II), [ 339,340 ] As(III) and As(V), [ 140,311,341 ] Cu(II), [ 342,343 ] Sb(III) and Sb(V), [ 79,344 ] Hg 0 , [ 310,345 ] Hg(II), [ 346 ] Zn(II), [ 347,348 ] Ni(II), [ 287,349 ] U(VI), [ 192,263,350,351 ] Eu, [ 352 ] etc. ( Table 1 ).…”