Hexavalent chromium is an environmental contaminant. Within the environment, marine waters are a common site for hexavalent chromium deposition. We have recently reported significantly high levels of chromium in skin tissue from North Atlantic right whales. These findings demonstrate that marine species are being exposed to chromium. It is possible that such exposures may be playing a role in p...

Introduction The identification and quantification of hexavalent chromium in solid samples is an important factor in characterization studies. The speciation of elements is a developing feature of analytical methods; the evaluation of the environmental and biological impact of the Cr (VI) compounds on environmental matrices is fundamental because of their demonstrated toxicity and potential car...

Annually, a large amount of effluents is discharged from an industrial zone dedicated to leather industries into a dried seasonal waterway bed in Mashhad plain, Northeast of Iran. These soils are high in pH, CaCO contents and have no naturally occurring chromium detectable in mg/kg range. Considering high 3 concentration of chromium in the discharged leather industries effluents and their direc...

aims: heavy metals are the main pollutants in nature. chromium is a heavy metal which is widely used. hexavalent chromium solubility and mobility in aqueous solutions is so high and it is easily reduced. biosorption is a process in which heavy metals are uptake through passive binding by nonliving biomass from aqueous solutions. the present study aimed to determine the capability of powdered sp...

MATERIALS AND METHODS Chromium is known to be an essential element1. Epidemiological and experimental studies have, however, demonstrated that some chromium compouds (mainly hexavalent salts) are mutagenic carcinogens2-5) (see ref. 1 for review). Recent studies have also shown that the hexavalent compounds induce dose-related increases in chromosomal aberrations and sister chromatid exchanges i...

Raw bagasse, Bagasse fly ash and distillery sludge, the waste generated in sugar mills and distillery have been used as lowcost potential biosorbent for the removal of hexavalent chromium from an aqueous solution. The effect of hydrogen ion concentration, contact time, adsorbent dose, initial concentrations of adsorbate and adsorbent dose on the uptake of chromium were studied in batch experime...

Estimation of water soluble hexavalent chromium and total chromium has been devised. For the complete extraction of water soluble hexavalent chromium, leaching period of five days is done. It was ascertained that complete extraction was achieved in five days; the total chromium determination in these samples was done by fusing sample with sodium carbonate up to 1050 C in muffle furnace. Chromiu...

The wastewater at Sukinda chromite mines (SCM) area of Orissa (India) showed high levels of toxic hexavalent chromium (Cr VI). Wastewater from chromium-contaminated mines exhibit potential threats for biotic community in the vicinity. The aim of the present investigation is to develop a suitable phytoremediation technology for the effective removal of toxic hexavalent chromium from mines wastew...

Chromium is present in the environment in several different forms. The most common forms are chromium(0), chromium(III) (or trivalent chromium) and chromium(VI) (or hexavalent chromium). Chromium(III) occurs naturally in the environment and is an essential nutrient that helps the human body utilize sugar, protein and fat. Chromium(VI) and chromium(0) are generally produced by industrial process...