Two new fluorescent chemosensors based on calix[4]arene bis(crown-6) bearing coumarin units have been synthesized for the detection of cesium ions in water. The photophysical and complexing properties of these sensors with cesium were investigated using absorption and fluorescence spectroscopies...

To support the viability of a wash-down approach to mitigating nuclear contamination, this study presents a characterization of the aggregate of a common concrete by optical microscopy and the sorption-desorption characteristics of cesium from these into potential wash solutions. Various mineral...

We propose a new approach to remediate cesium-contaminated clays based on intercalation of the cationic surfactant dodecyltrimethylammonium bromide (DTAB) into clay interlayers. Intercalation of DTAB was found to occur very rapidly and involved exchanging interlayer cations. The reaction yielded...

Osmotic coefficients for aqueous (lithium sulfate + cesium sulfate), (sodium sulfate + cesium sulfate), and (potassium sulfate + cesium sulfate) at 298.15 K have been measured isopiestically. Parameters of Pitzer's model have been calculated from these measurements. The predicted solubility...

Lepidolite is a valuable mineral resources of lithium, rubidium and cesium. However, most researches only focused on the lithium extraction without recovery of rubidium and cesium, and most of these processes involved energy-intensive high-temperature roasting and/or mechanical activation. In th...

The electrical conduction and dielectric properties of cesium sulfate, based materials of Cs2CO3:H2SO4:H3PO4 system with mole ratio 2:1:1, respectively, have been investigated in the temperature range 273–473 K and frequency range 50 Hz to 1 MHz. The data predict a phase transition for cesium s...

Liquid–liquid equilibria for the quaternary system water + 1-propanol + cesium sulfate + cesium chloride were measured at 25 °C. The binodal curves and tie lines for quaternary system have been determined in order to investigate salting effects. Experimental tie lines were compared with values...

Cesium sulfate arsenate tellurate (CsSAsTe) presents one reversible phase transition of the first-order type at 213/211 K on heating–cooling runs. Indeed, it crystallizes at T = 120 K in the monoclinic system P21/c and at T = 275 K, in the trigonal system R3¯c. These crystal structures are bui...

This study investigates the mechanisms of Cr(VI) adsorption on natural clay (illite and kaolinite) and synthetic (birnessite and ferrihydrite) minerals, including its speciation changes, and combining quantitative thermodynamically based mechanistic surface complexation models (SCMs) with spectr...

Pure and 0.25% Ni2+ ion doped goethite samples, prepared by the coprecipitation method, were characterized for pH of Point of Zero Charge (pHpzc), Surface area, XRD, TG-DTA, FTIR and TEM. Effect of Ni2+ ions doping on the adsorption of chromate on goethite was investigated at pH-3, -5 and -7 in ...

Adsorption reactions play an important role in the transport behavior of groundwater contaminants. Molecular-scale information is needed to elucidate the mechanisms by which ions coordinate to soil mineral surfaces. In this study, we characterized the mechanisms of chromate adsorption on boehmit...

We use a soft-approach for synthesis of quasi-spherical, ultra-small, digestively-ripened, stable copper oxide QDs (radius

A high-quality polycrystalline bismuth vanadate (BiVO4) film was prepared on a fluorine-doped tin oxide substrate via a facile two-step strategy involving electrodeposition and annealing processes. The morphology and structural characterization of the resulting film were investigated by differen...

Electrolyte used in the manufacturing process of sodium chlorate contains chromate primarily to inhibit cathodic loss reactions. Chromate also accelerates the chlorate formation reaction which reduces the concentration of hypochlorite species in the chlorate cell leading to enhanced anodic curre...

During the processing of fresh produce, washing with chlorinated water may result in an unacceptable source of chlorate as a disinfection by-product (DBP) in the finished product. The differential ability for the uptake of chlorate by different fresh-cut products during washing was evaluated. Re...

The results of the validation study of the LC-ESI-MS/MS method for the determination of chlorate (ClO3−), perchlorate (ClO4−) and bromate (BrO3−) in water and food samples are summarized. Towards this, 284 samples of drinking water were analysed, out of which the 69% contained chlorate above the...

The hexadentate ligand, 2,2′-bis(salicylideneamino)azobenzene, 1 has been synthesized from 2,2′-diaminoazobenzene and salicylaldehyde in refluxing diethyl ether. Reaction of ligand 1 with Cu(II) acetate and Cu(II) perchlorate separately in methanol afforded tetradentate (N,N,N,O) Cu(II) comple...

Oxidation of saturated hydrocarbon by transition metal complexes is of great importance because this would give industrially valuable organic fine chemicals. Here, dinuclear copper(II) and dinuclear nickel(II) complexes with same N,O donor ligand have been used as catalyst for the oxidation of c...

A centrosymmetric square planar bis-ligand copper(II) complex, [Cu(HL)2](ClO4)2, with a potential tetradentate Schiff base, HL = 2-(2-(ethylamino)ethyliminomethyl)-6-ethoxyphenol, containing pendant side arm, has been prepared and characterized by elemental and spectral analysis and single cryst...

A catalytic adsorptive stripping voltammetric procedure of the determination of ultratrace amounts of molybdenum using a novel catalytic system, Mo(VI)-chloranilic acid-chlorate was elaborated. In a supporting electrolyte containing 0.01 M HCl (pH 2), 2.5 × 10−4 M chloranilic acid and 0.4 M KCl...