Indoor dust ingestion is an important pathway in human exposure to environmental pollutants, and the bioaccessibility of pollutants can largely influence human exposure risk assessment. In the present study, the concentrations and compositions of organophosphate esters (OPEs) were investigated f...

A new enzymatic protocol based on lipase-catalyzed cascade toward (E)-α,β-unsaturated carboxylic esters is presented. The proposed methodology consists of elementary organic processes starting from acetals and cyanoacetic acid leading to the formation of desired products in a cascade sequence....

Phthalate esters (PAEs) can be released into the environment during the dismantling of electronic waste (e-waste), but urinary levels of PAE metabolites (mPAEs) in humans living in e-waste sites have not been documented. In this study, 11 mPAEs were determined in urine samples collected from par...

In the present study, urine samples (n = 258) were collected from adults (n = 42) and children (n = 22) in an electronic waste (e-waste) recycling site. The concentrations and compositions of six di-esters, or the metabolites of phosphate flame retardants (PFRs), were measured at different time ...

In this research, microstructural evolution and magnetic properties of cobalt ferrite spinel (CoFe2O4) were studied. The ferrite was prepared by the glycine-nitrate process (GNP) followed by calcination process, and subsequent high energy mechanical milling. The samples were characterized by X-r...

In this paper thermochromic features of cobalt(II) were investigated in the binary mixture containing inorganic salt (ammonium nitrate) and molecular solvent (N-methylformamide) in order to find responsive thermochromic medium for possible application in a greenhouses for auto-regulated shading ...

The effect of the direct reduction of cobalt nitrate versus the more conventional calcination/reduction treatment has been investigated. Porosity properties of the catalysts are not significantly modified by avoiding the calcination step, as similar BET surface area, pore volume and pore diamete...

In recent years, polymeric membranes holds superior position in filtration processes as it was cost effective and simple to prepare. In the present study we have synthesized a novel organic-inorganic hybrid thin sheet membrane using chitosan/polyvinyl alcohol and montmorillonite clay followed by...

Recently, nanomaterials based adsorbents play a prominent role in the removal of toxic ions from aqueous solution. Hence in the present study, nano-graphene oxide (n-GO) fabricated hydrotalcite ([email protected]) composite was prepared by hydrothermal method for chromium removal. To improve the...

The reduction mechanism of Cr(III) depends on the nature of the complexing agent present in electroplating solutions. In pure water solutions and without any other additives, Cr (III) is complexed with water molecules, creating a stable [Cr(H2O)6]3+ complex. [Cr(H2O)6]3+ can be reduced to Cr(0) ...

Ferrochromium and chromium based compounds are produced worldwide from chromite ore. Chrome chemicals are from chromium based compounds. Basic-chromium-sulfate (BCS) is a chrome chemical mostly required as main tanning agent in chrome tanning process in leather industry and also to synthesize ot...

Schwertmannite is a ferric oxyhydroxy-sulfate mineral, which is commonly found in acid sulfate systems. In this study, the liberation of chromium from Cr(VI)-substituted schwertmannite in the presence of the siderophore desferrioxamine B was studied. In addition, mineral transformation was exami...

The present paper reveals the effects produced by a chromium (III) sulfate colloidal solution on Gibbs monolayers of (i) sodium dodecyl sulfate (SDS) and (ii) turkey red oil (TRO) formed at the air/water interface. Their intermolecular interactions and the modifications of the interphase propert...

Lead sulfate was chose to precipitate chromium (VI) based on the difference of the solubility between lead sulfate and lead chromate. The effects of parameters on the precipitation efficiency of chromium including reaction temperature, reaction time, and initial pH of solution and dosage of lead...

The aim of this work was to study and to model the biodegradation of atrazine and 2,4-dichlorophenoxy acetic acid by aerobic mixed cultures. Slow removal rates were observed when biodegrading atrazine, in spite of the initial concentrations. However, high removal rates were obtained when biodegr...

Montmorillonite (Mt) hold a great potential in improving inflammability of polyamide nanocomposites. This paper presents research on a novel class of flame retardants prepared by adsorption of disodium H-phosphonate (DHP) on the sodium montmorillonite (Mt) and organophilized montmorillonite (OMt...

The effect of adding silica (SiO2) to a mixed-salt solid acid composite, CsH2PO4/NaH2PO4, was studied via conductivity measurements, thermal analyses and X-ray diffraction. The conductivity value of the composites ranged from 1.1 × 10−4 S cm−1 to 7.6 × 10−3 S cm−1 for temperatures from 210 °C...

Inosine 5′-monophosphate in acidic form and its lithium, potassium, magnesium, calcium, strontium and barium were prepared from the sodium salt, characterized by elemental analysis and Fourier transform infrared spectroscopy and submitted to thermogravimetry (TG), differential thermal analysis ...

Commercial disodium hydrogen phosphate dodecahydrate (Na2HPO4·12H2O) was used as a precursor for synthesizing disodium hydrogen phosphate hexahydrate (Na2HPO4·6H2O) and sodium diphosphate (Na4P2O7). The purity of the synthesized products was checked up by IR spectroscopy and X-ray diffraction....

A highly sensitive colorimetric method for detection of alkaline phosphatase (ALP) and carbohydrate antigen (CA125) was developed, which was achieved by ascorbic acid (AA) - mediated enhanced growth of silver nanoparticles (AgNPs) promoted with NaBH4 as pre-reducing agent. With prereduction by N...