, resists competitive adsorption from other water and sediment contaminants.
Our material is tailor-made for selecting uranium over other metals present in seawater and can easily be recycled for reuse, making it much more practical and efficient than previously developed adsorbents
. Popovs took inspiration from the chemistry of iron-hungry microorganisms.
Adsorption measurements were determined, by batch experiments of known amount of adsorbent
, with 50 mL of aqueous MB solutions of known concentration, in a series of 250 mL Erlenmeyer flasks.
Microwave oven (Dawlance, 2,450 MHz) was used for irradiation of adsorbent
Combination of high porosity and specific surface area adsorbent
can be used to achieve maximum removal.
At higher temperature adsorbate are known to be less viscous and more mobile thus their molecules diffuses faster across the external boundary layer and in the internal pores of the adsorbent
The selectivity of 1 and 2 toward Pd, Au, and Ag is higher than conventional adsorbents
having thiocarbonyl groups such as thioamide [26-30, 46-52], thiourethane [32, 34, 36], and thiourea [11, 25, 53-59] including a commercial adsorbent
QuadraPure[TM] TU (Aldrich) with the R-NH(C=S)N[H.sub.2] structure .
where [C.sub.0] and [C.sub.e] (mg/L) are the liquid-phase heavy metal concentrations initially and at equilibrium, respectively; V is the volume of the solution (L); and m is the mass of the dry adsorbent
FESEM images of the adsorbent
(HRMCAB) were taken by using HITACHI S3700N SEM instrument manufactured by HITACHI High-Technologies Ltd., India.
The amount of adsorption [q.sub.e] at equilibrium was defined as the amount of adsorbate per gram of adsorbent
(in mg x [g.sup.-1]) and was calculated by the following equation:
where [C.sub.e] and [q.sub.e] refer to the concentration (mg/L) of metal ions and equilibrium adsorption capacity (mg/g) of the adsorbent
under adsorption equilibrium, respectively.
Effective capture of radioactive organic iodides (such as methyl iodide) remains a significant challenge due to the drawbacks of currently used adsorbents