This short review article provides an insight into the synthetic chemistry involved in the formation of bismuth based versatile frameworks. A unique feature of bismuth compounds is their ability to undergo hydrolysis to produce oxido/hydroxido clusters of various sizes and nuclearities which ult...

Mesoporous δ-Bi2O3 samples with high surface area and small crystallite sizes were prepared by using different SBA-15 silicas as hard templates. The latter were synthesized hydrothermally using tetraethylorthosilicate (TEOS), sodium metasilicate (SMS), and water glass (WG) as silica sources. Th...

Recovery of copper, nickel and cobalt from the acidic pressure leaching solutions of Jinbaoshan (YN Province, PRC) low-grade sulfide flotation concentrates was investigated. The proposed technique includes four major steps: (1) the acidity adjustment of the acidic pressure leaching solutions; (2...

To understand the processes and timing of their formation, six non-sulfide Zn–Pb ore deposits were investigated in the Moroccan High Atlas. Sulfide and non-sulfide ores are hosted in Lower Jurassic reefal to para-reefal limestone. Zn (Pb) carbonates, Zn silicates and associated hydrated phases ...

Two compounds based on calcium silicate hydrate and modified with Fe(III), using FeCl3 and Fe(OH)3 as iron sources, were synthesized, characterized and evaluated as adsorbents for removing ionic species from an arsenic-containing acidic aqueous mine solution. The adsorbents were prepared by cont...

Although there have been numerous studies on metal sulphide precipitation, the research field as a whole is not well integrated. This paper reviews the disparate areas of study into metal sulphide precipitation in an attempt to summarise the current work, as well as to suggest potential for futu...

The separation of nickel and cobalt from impurities such as manganese, magnesium and calcium using solvent extraction with Versatic 10 was largely improved by the addition of a synergistic reagent LIX63 (an α-hydroxyoxime) or 4PC (a pyridine carboxylate ester). With the organic systems containi...

Mixed sulphide–oxide lead and zinc ores are most often found in the transition, and occasionally in the oxidised, zones of lead–zinc ore-bodies. They are of great importance because there are numerous unexploited or abandoned reserves of these ores in the world.However they present difficultie...

The primary arsenic-bearing minerals and their relation to the mobilization of arsenic in groundwater are investigated in a mineralized area of the Canadian Shield (Province of Quebec, Canada). Bedrock core and groundwater samples were collected from three mining exploration boreholes completed ...

Non-sulfide zinc deposits were the prime source for zinc metal production for hundreds of years. However, during the early 20th century, their significance diminished due to the development of flotation and smelting techniques for zinc sulfides. At the present time, zinc sulfide ores are the mos...

The nature and distribution of sulfides within 17 porphyritic chondrules of the Sahara 97096 EH3 enstatite chondrite have been studied by backscattered electron microscopy and electron microprobe in order to investigate the role of gas–melt interactions in the chondrule sulfide formation.Troili...

α-Fluoro acids (78–90% ee) and β-fluoro alcohols (89–>95%ee) of well defined stereochemistry are prepared via the diastereoselective fluorination of chiral imide enolates with NFOBS (3).

N-Fluoro-o-benzenedisulfonimide (5) is a stable, easily prepared, highly efficient source of “electrophilic” fluorine which fluorinates enolates, azaenolates and carbanions in good to excellent yields.

The preparation of two novel nickel chromate complexes with 2,2′-bipyridine is described. The results of thermal, spectral, magnetic and scanning microscopic studies are analyzed. The data show that the complexes are monomers with pseudooctahedral arrangement around the nickel ion. The coordina...

Hexavalent chromium (Cr(VI)) attracted researchers’ interest for its toxicity, natural availability and removal difficulty. Nevertheless, its sorption mechanism is not clearly understood yet. In this work, we elucidated the sorption mechanism of the co-precipitation of chromates with ferrihydri...

Nickel aluminate (NiAl2O4) and doped nickel aluminate (Ni1-xMxAl2O4; M = Mg, Zn, Cu; x = 0.1) were prepared by sol-gel method using citric acid. The synthesized compounds were analyzed by various techniques such as powder XRD, FTIR, SEM-EDAX and UV-DRS. The lattice parameter was found to increas...

The mortality rate of cupric sulfate is relatively high in contrast to that of other heavy metals. Cases of orally ingested cupric sulfate poisoning are very rare, with a reported half lethal dose of 10 g. Cupric sulfate poisoning leads to gastrointestinal corrosion, intravascular hemolysis, hem...

In this study benefits of employing copper sulfate salt hydrate with water vapor as a new adsorption pair in thermally driven adsorption desalination-cooling systems (ADCSs) have been investigated. Adsorption characteristics (isotherm and kinetic) of copper sulfate/water vapor pair have been pre...

Well dispersed copper particles with size from 15 to 100 nm and their aggregates up to 320 nm were obtained by chemical reduction in the presence of anionic surfactant sodium dodecyl sulfate. As a reducing agent hydrazine hydrate of various volumes (1, 3 and 6 ml) was used with a fixed volume of...

Lime neutralization is widely used to precipitate heavy metals including copper and nickel from wastewater. Limestone (calcium carbonate: CaCO3) is too stable to be used directly for this purpose. Grinding of CaCO3 in the solutions of copper and nickel sulfate was conducted to raise its reactivi...