English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The aim is collecting uranium from groundwater in which uranium mainly exists in negative species, the amidoxime-functionalized hydrothermal carbon (AO-HTC) was synthesized. From the results of N2 adsorption-desorption and SEM, AO-HTC is a small spherical surface; FT-IR and Elemental analysis showed that the amidoxime group was successfully grafted onto the surface of the material; Zeta-potential measurement showed that the amino nitrogen atom is protonated in the oxime group. The optimum pH value of AO-HTC for uranium adsorption is 6.0, and the adsorption equilibrium is reached within 80 min, which is in accordance with the pseudo-second order adsorption kinetic model. The adsorption of uranium by AO-HTC accords with the Langmuir isotherm adsorption model, and the single-layer saturated adsorption capacity is 254.13mg·g-1. The thermodynamic parameters calculated by the adsorption isotherm indicate that AO-HTC adsorption of uranium is a spontaneous endothermic chemical process and Carbonate ion, calcium ion and humic acid concentration have great influence on uranium adsorption. The experiments results show that AO-HTC has the potential to elimination of U(VI) from groundwater.

Adsorption of U(VI) onto Amidoxime-functionalized Hydrothermal Carbon in the Presence of Ca-U(VI)-CO3 Complexes