Related Experiment Video
Updated: May 28, 2026

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability
Published on: June 21, 2015
Impact of water quality parameters on the sorption of U(VI) onto hematite
Donglin Zhao1, Xianbiao Wang, Shitong Yang
1School of Materials and Chemical Engineering, Anhui University of Architecture, Hefei 230601, PR China.
Abstract:
In this study, the sorption of U(VI) from aqueous solution on hematite was studied as a function of various water quality parameters such as contact time, pH, ionic strength, soil humic acid (HA) or fulvic acid (FA), solid content and temperature by using a batch technique. The results demonstrated that the sorption of U(VI) was strongly dependent on ionic strength at pH<6.0, and outer-sphere surface complexation may be the main sorption mechanism. The sorption was independent of ionic strength at pH>6.0 and the sorption was mainly dominated by inner-sphere surface complexation. The presence of HA/FA increases U(VI) sorption at low pH, whereas decreases U(VI) sorption at high pH. The thermodynamic parameters (ΔH⁰, ΔS⁰, and ΔG⁰) were calculated from the temperature dependent sorption isotherms, and the results suggested that U(VI) sorption was a spontaneous and endothermic process. The results might be important for the application of hematite in U(VI) pollution management.
Related Concept Videos
Microbial Bioremediation of Uranium
Factors Affecting Solubility
Precipitation and Co-precipitation
Precipitation of Ions
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
UV–Vis Spectrometers

