15 research outputs found
Cupric Ion Reducing Antioxidant Capacity Assay for Food Antioxidants: Vitamins, Polyphenolics, and Flavonoids in Food Extracts
Optimization of Tocopherol Concentration Process From Soybean Oil Deodorized Distillate Using Response Surface Methodology
Optimization of tocopherol concentration process from soybean oil deodorized distillate using response surface methodology
Universal Approach for Selective Trace Metal Determinations via Sequential Injection−Bead Injection−Lab-on-Valve Using Renewable Hydrophobic Bead Surfaces as Reagent Carriers
Determination of Copper in Human Urine by RP-LC After Pre-column Derivatization with Neocuproine and Use of Monolithic Column
Recovery of molybdenum oxyanions using macroporous copolymer grafted with diethylenetriamine
The presented study describes macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) [PGME] functionalized with diethylenetriamine [PGME-deta] as a potential recovery agent for Mo(VI) oxyanions from aqueous solutions. Sorption studies were carried out by varying experimental conditions (pH, time, concentration, temperature). Kinetics of Mo(VI) sorption was investigated in batch (static) experiments, in the temperature range 298-343K. Sorption dynamics data were fitted to seven chemical-reaction and particle-diffusion models. The kinetics studies showed that Mo(VI) sorption adhered to the pseudo-second-order model under all investigated operating conditions. The sorption kinetics was determined to be governed by both the intraparticle diffusion and the external film diffusion to a lesser extent. The temperature rise promotes the molybdate species removal, with the maximum experimental uptake capacity of 4.02mmolg- 1 at 298K, at the selected pH which is consistent with the predominance range of hydrolized polynuclear Mo(VI) forms and optimum electrostatic attraction