background nowadays, removal of heavy metals from the environment is an important problem due to their toxicity. objectives in this study, a modified method was used to synthesize chitosan-coated magnetite nanoparticles (ccmn) to be used as a low cost and nontoxic adsorbent. ccmn was then employed to remove hg2+ from water solutions. materials and methods to remove the highest percentage of mer...

The electrochemical behavior of aqueous Hg(II) ions at a gold film electrode is described. The effects of supporting electrolyte and halide ions on the anodic stripping voltammetric behavior of Hg(II) ions was illustrated to prepare a basis for the analysis in real samples with high saline content. The concentration ratio of metallic mercury to halide ions at the electrode surface determines th...

A highly sensitive fluorescent turn-on probe specific for methylmercury species as well as inorganic mercury ions has been developed on the basis of mercury ion-promoted hydrolysis of a fluorescein-derived aryl vinyl ether.

direct orthogonal signal correction(dosc) and savitzky-golay filters (sgf) were applied as preprocessing methods on the original and first derivative absorbance data. principle component regression (pcr), partial least squares (pls) and iterative target transformation factor analysis (ittfa), were used in spectrophotometric simultaneous determination of heavy divalent metal ions, lead, zinc,mer...

This paper describes a indirect complexometric method for the determination of mercury in the presence of co-ions, based on the selective masking ability of potassium iodide. To the mixture of mercury (II) and other metal ion solution, EDTA solution was added in excess of the metal ions present. The pH of the solution was adjusted to 5.0-6.0 using solid hexamine (10 ± 2 g) and surplus EDTA was ...

BACKGROUND A new organodithiophosphorus derivative, namely O-(1,3-Bispiperidino-2-propyl)-4-methoxy phenyldithiophosphonate, was synthesized and then the kinetic behavior of the transport process as a function of concentration, temperature, stirring rate and solvents was investigated. RESULTS The compound 1 was characterized by elemental analysis, IR, 1H and 31P NMR spectroscopies. The transp...

A new method for the simultaneous determination of lead, cadmium and mercury ions in microwave-digested foodstuffs by reversed-phase high-performance liquid chromatography combined with on-line enrichment technique has been developed. The foodstuff samples were digested by microwave digestion. The lead, cadmium and mercury ions can be precolumn derivatized with 5,10,15,20-tetrakis(3-aminophenyl...

Owing to the prevalence of mercury in the environment, the risk of human exposure to this toxic metal continues to increase. Following exposure to mercury, this metal accumulates in numerous organs, including brain, intestine, kidneys, liver, and placenta. Although a number of mechanisms for the transport of mercuric ions into target organs were proposed in recent years, these mechanisms have n...

The presence of heavy metals released from industrial activities into water streams is an ever-growing challenge to ensuring a safe and clean aquatic environment. Detection and determination of the levels of these heavy metals in wastewater is an important step before any measures can be taken. In this study we report on a fluorescent sensing probe based on a naphthyl azo dye modified dibenzo-1...

A systematic study on the efficiency of inductively coupled plasma quadruple mass spectrometry (ICP–QMS) in determination of stable mercury isotopes profile has been conducted. Two types of effects have been observed: non-specific, which influenced all mercury isotopes, and specific, which applied only to selected isotopes. Non-specific effects were those, for which the sensitivity depended sig...