Methods for selenium removal from contaminated waters: a review

Worldwide contamination of waters by metals, metalloids, and organometallic pollutants is a major health issue. In particular, the occurrence selenium metalloid at rather high concentrations in environment, especially water compartment, increasing concern, notably developing countries. Selenium difficult to remove from groundwater industrial effluents because often present complex polycontaminated mixtures, thus inducing competition issues with other anions. Moreover, efficiency remediation methods depends on speciation parameters, e.g. pH concentration competing Here, we review for removal water, wastewater, effluents. Technologies are based zero-valent iron, iron-oxy-hydroxides, supported materials, nanofiltration, reverse osmosis, chitosan-enhanced ultrafiltration, electrodialysis, activated granular sludge.