Influence of pH on U(VI) Adsorption using a Thermally-Treated Mg-Al Hydrotalcite and a Natural Zeolite in a Batch System

Synthesis of Porous Magnetic Ni0.6Fe2.4O4 Nanorods for Highly Efficient Adsorption of U(VI)

“…When the pH is above 9.0, the adsorption efficiency decreases with the increase of pH value in the solution, which may result from the electrostatic repulsion between the increasingly negative U­(VI) species and MN status . In general, the electrostatic force between ions and MNs with varying pH is responsible for different adsorption performance, and a similar mechanism can be found when using other adsorbents for U­(VI) removal, such as amazon kaolinite, activated carbon, and so on. − Furthermore, the impact of the ionic strength on adsorption was also investigated. It can be seen from Figure a that ionic strength had little effect on similar adsorption efficiency at the same pH value with varying NaNO 3 concentrations, indicating inner-sphere surface complexation of U­(VI) adsorption onto the MNs.…”

Local Structure Investigations of Sequential Sorption of U and Fe on Polyacrylamide Hydroxamic Acid Resins

“…In spite of radio-toxicity, it reflects its unique quality in nuclear energy contribution. Since it is abundantly used in the nuclear power segment, safe disposal of related waste effluent by a selective, stable matrix is an extremely important issue. − Even at low concentrations, uranium is toxic mainly because of its persistent and accumulative nature, and chronic exposure of this heavy metal is known to cause bone degeneration and liver, lung, and blood damage, with the safe limit for drinking water being 60 ppb . Therefore, separation and recovery of uranium are of great practical significance.…”

Isotherm Analysis on the Removal of Ni (II) ION from Wastewater using APANC

“…T e bT (7) Which, can be represented in the following linear form RT RT q = lnK + lnC e T e bb (8) Where, K T (L/g) is the Temkin isotherm constant, b T (J/mol) is a constant related to heat of sorption, R is the ideal gas constant (8.314 J/mol K), and T is absolute temperature (K). A plot of q e versus lnC e enables the determination of isotherm constants K T and b T from the slope and intercept, The model parameters are listed in Table 2.…”

“…Adsorption isotherm [4][5][6][7][8] describes the relation between the amount or concentration of adsorbate that accumulates on the adsorbent and the equilibrium concentration of the dissolved adsorbate. Equilibrium studies were carried out by agitating a series of beakers containing 50 mL of Ni (II) solutions of initial concentration 20 mg/L with 0.025 g of activated nano carbon at 30 0 C with a constant agitation.…”