الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Through these heavy metals exist chromium, which is used in different industrial applications such as: leather tanning, dye, mining, iron sheet cleaning, textile dying, cement and electroplating industries. Contamination of water by chromium is due to both natural and industrial sources. In natural aquatic ecosystems, the range of chromium concentration is quite large from 5.2 to 208.000 mg/L. Nevertheless, for most natural water the chromium concentration is below the 50μg/L value recommended for drinking water by the World Health Organization or the US Environmental Protection Agency; However, chromium concentration in wastewater may vary from about ten to hundreds of mg/L. Such variation depends on different chromium industrial sources (Elangovan et al., 2008<a ; Kurniawan et al., 2011 a.