A simple phosphorylation modification of hydrothermally cross-linked chitosan for selective and efficient removal of U(VI)

Indole-functionalized cross-linked chitosan for effective uptake of uranium(vi) from aqueous solution

“…The IAA-CTSA exhibited the highest adsorption capacity comparable to most of these alternative adsorbents. 4,28,29,37,57,[61][62][63][64][65][66][67][68][69] Particularly, the maximum adsorp-tion capacity (847.5 mg g −1 ) was dramatically higher than these selected CTS-based adsorbents. 4,28,29,57,[61][62][63][64][65][66][67][68][69] These results revealed the exceptional capture ability of U(VI) on IAA-CTSA benefitting from the synergy of electrostatic interactions, complexation and cation-π interactions.…”

“…4,28,29,37,57,[61][62][63][64][65][66][67][68][69] Particularly, the maximum adsorp-tion capacity (847.5 mg g −1 ) was dramatically higher than these selected CTS-based adsorbents. 4,28,29,57,[61][62][63][64][65][66][67][68][69] These results revealed the exceptional capture ability of U(VI) on IAA-CTSA benefitting from the synergy of electrostatic interactions, complexation and cation-π interactions. Thus, IAA-CTSA is an applicable, environmentally friendly and costeffective candidate for extraction, pretreatment and recovery of U(VI) in aqueous solution.…”

“…Nowadays, many CTS-based materials have been proposed for the remediation and recycling of U(VI)-containing wastewater. 4,[27][28][29][30] However, pure CTS is prone to decomposition in acid environments forming a viscous solution which impairs its mechanical strength, restricting its removal properties. Crosslinking reactions are an effective approach to improve the uptake ability of CTS by enhancing the acid resistance and mechanical strength.…”

Efficient Separation of Uranium(VI) by CaCO3-Doped Chitosan with PO43– Modification: Adsorption Behaviors and Mechanism Study

“…Many adsorbents, such as chitosan, Al 2 O 3 , graphene, and so on, have played a major role in uranium separation. 10,11 However, some adsorbents are difficult to use on a large scale due to their high price, poor selectivity, low adsorption efficiency, and difficult preparation. Among these adsorbents, chitosan has shown extensive attention due to its wide sources, easy preparation, and abundant active sites.…”

“…The selection of materials with excellent adsorption performance as the adsorbent is the key to realizing the large-scale application of adsorption technology. Many adsorbents, such as chitosan, Al 2 O 3 , graphene, and so on, have played a major role in uranium separation. , However, some adsorbents are difficult to use on a large scale due to their high price, poor selectivity, low adsorption efficiency, and difficult preparation. Among these adsorbents, chitosan has shown extensive attention due to its wide sources, easy preparation, and abundant active sites. − For example, Sharma et al obtained a magnetic chitosan composite and its adsorption capacity and efficiency for uranium reached 504.0 mg/g and 84.4%, respectively .…”