The thermodynamics of U(VI) sorption on SONPs (<i>I</i> = 0.01 mol/L NaClO₄, <i>s</i>/<i>l</i> = 0.6 g/L, <i>pH</i> = 5.0±0.1).

<p><b>(A) Sorption isotherms at three different temperatures. (B)</b> Linear plots of ln<i>K</i>_<i>d</i> versus <i>C</i>_<i>e</i><b>.</b></p

The influence of ionic strength on U(VI) sorption to SONPs (<i>T</i> = 298±1 K, s/l = 0.6 g/L, [U(VI)] = 2.0×10⁻⁵ mol/L, <i>pH</i> = 4.7±0.1).

<p>The influence of ionic strength on U(VI) sorption to SONPs (<i>T</i> = 298±1 K, s/l = 0.6 g/L, [U(VI)] = 2.0×10⁻⁵ mol/L, <i>pH</i> = 4.7±0.1).</p

Thermodynamic Parameters for U(VI) Sorption on SONPs.

<p>Thermodynamic Parameters for U(VI) Sorption on SONPs.</p

The Average Distribution Coefficient Values and Sorption-desorption Hysteresis (<i>HC</i>%) of HA and U(VI) Sorption in the Binary and Ternary System.

<p>The Average Distribution Coefficient Values and Sorption-desorption Hysteresis (<i>HC</i>%) of HA and U(VI) Sorption in the Binary and Ternary System.</p

The influence of pH on U(VI) sorption on SONPs under varying uranium concentrations (<i>T</i> = 298±1 K, <i>I</i> = 0.01 mol/L NaClO₄, <i>s</i>/<i>l</i> = 0.6 g/L).

<p>The influence of pH on U(VI) sorption on SONPs under varying uranium concentrations (<i>T</i> = 298±1 K, <i>I</i> = 0.01 mol/L NaClO₄, <i>s</i>/<i>l</i> = 0.6 g/L).</p

The FT-IR spectrums of unitary/binary/ternary complexes.

<p>(A) <b>SONPs.</b> (B) <b>SONPs-HA (<i>pH</i> = 3.0).</b> (C) <b>SONPs-HA-U(VI) (<i>pH</i> = 3.0). (D) UO</b>_<b>2</b><b>(NO</b>_<b>3</b><b>)</b>_<b>2</b><b>.</b></p

Binding modes and reversibility of interactions among SONPs, U(VI), and HA.

<p>The interactions of different systems occur in the aqueous phase. Blue particle presents SONPs; Gray particle presents U(VI); Brown part presents HA.</p

Hydrodynamic diameter (<i>d</i>_h) number distributions presented as particle size distribution of SONPs (10 mg/L) in different systems at <i>pH</i> 4.5±0.1.

<p>(A) The unitary SONPs system. (B) The binary SONPs/U(VI) system. (C) The binary SONPs/HA system (15 mg/L HA). (D) The binary SONPs/HA system (50 mg/L HA). (E) The ternary SONPs/U(VI)/HA system (15 mg/L HA). (F) The ternary SONPs/U(VI)/HA system (50 mg/L HA).</p

Relative Parameters of Langmuir, Freundlich, Temkin and D-R Models of U(VI) Sorption on SONPs.

<p>Relative Parameters of Langmuir, Freundlich, Temkin and D-R Models of U(VI) Sorption on SONPs.</p

The influence of HA on the interaction between U(VI) and SONPs (<i>T</i> = 298±1 K, <i>I</i> = 0.01 mol/L NaClO₄, <i>s</i>/<i>l</i> = 0.6 g/L).

<p>(A) The influence of HA on U(VI) sorption edge on <b>SONPs</b> ([U(VI)] = 2.0×10⁻⁵ mol/L). (B) HA sorption edge on <b>SONPs ([</b>HA] = 20 mg/L).</p