Removal behavior and mechanisms of U(VI) in aqueous solution using aloe vera biochar with highly developed porous structure

A Review on the Removal of Heavy Metals from Water by Phosphorus-Enriched Biochar

“…The released H + ions then etch the surface of the biomass, leading to the formation of oxygen-containing functional groups. The increased abundance of these functional groups enhances the surface complexing capability of PBC [83]. By comparing the XPS and FTIR results of PBC before and after adsorption, it is evident that the binding energy associated with O-P-O and P=O decreases, accompanied by a shift in the absorption peak.…”

“…Their presence catalyzes the decomposition of organic matter, resulting in gas generation, and facilitating the formation of micropores [33,41]. Enhancing the pore structure and fostering synergistic effects among pores of varying scales provide additional pathways for the physical adsorption and diffusion of heavy metals, augmenting the phosphorus load on the surface of biochar and within its pores [71,83].…”

Experimental study on the removal of U(VI) from wastewater by chitosan modified with persimmon tannin

“…Since the adsorption method has the following advantages of easy implementation, relatively low cost, a wide range of adaptation, reusability, and low secondary pollution, it is considered a costeffective technology for uranium removal from aqueous solution; the key to treating uraniumcontaining rare earth wastewater is to find an efficient adsorbent that is environmentally friendly, acid stable, selective, and resistant to interference [4] . Chitosan molecular chains are rich in amino and hydroxyl groups, which can chelate metal ions and be modified to obtain chitosan-based materials with various functions according to specific application requirements; thus, chitosan is considered as an ideal adsorbent material for the removal of heavy metal ions [5] .…”