Voltammetric measurement of arsenic in natural waters.

The efficiency of pistacia atlantica extract as a natural coagulant aid on arsenic removal from aquatic environments

Background: Arsenic has been considered as one of the most hazardous element for the living organisms and its presence in natural waters, can result in serious health and environmental problems. In this study, Pistacia Atlantica seed extract ability in a batch system to remove arsenate from aqueous solutions was investigated. Materials and methods: This study is an experimental study that was ...

Simultaneous determination of inorganic As(III), As(V), Sb(III), Sb(V), and Se(IV) species in natural waters by APDC/MIBK-NAA

A solvent extraction preconcentration and separation method involving ammonium pyrrolinedithiocarbamate (APDC) and 4-methyl-2-pentanone (MIBK) in conjunction with neutron activation analysis (NAA) was employed for the simultaneous measurement of low levels of inorganic arsenic, antimony and selenium species in natural waters. Several critical factors affecting the APDC/MIBK-NAA method were stud...

A New and Efficient Method for the Adsorption and Separation of Arsenic Metal Ion from Mining Waste Waters of Zarshouran Gold Mine by Magnetic Solid-Phase Extraction with Modified Magnetic Nanoparticles

Widespread arsenic contamination of mining wastewater of Zarshouran (West Azerbaijan province) has led to a massive epidemic of arsenic poisoning in the whole of surrounding areas. It is estimated that approximately all agriculture fields are being irrigated with the water that its arsenic concentrations elevated above the World Health Organization’s standard of 10 parts per billion. A novel ad...

Speciation and Cycling of Arsenic, Cadmium, Lead and Mercury in Natural Waters

The cycling of the elements in natural waters is driven by a combination of chemical and biological processes. This paper will focus on two key features of the natural water chemistry of As, Cd, Pb and Hg, chemical speciation and mean oceanic residence time. Calculation of equilibrium speciation in solution is heavily dependent on the accuracy of both the complex stability constants used and of...

VOLTAMMETRIC STRIPPING OF TRACE ARSENIC IN FLOW CELLS WITH GOLD WIRE AS WORKING ELECTRODE by