Impact of Chromium Pollution in Gangetic Regions
Chromium (Cr) is one of the world’s most strategic and critical materials having a wide range of uses in the metals and chemical industries. It has high value in the industrial world because it can be polished to a mirror-like finish, and provides a durable, highly rust resistant coating, for heavy applications. Chromium is mined in different countries around the world to be used in a number of metal alloys such as metal ceramics, stainless steel and in chrome plating. Chromium is unstable in an oxygenated environment and, when exposed to air, immediately produces an oxide layer which is impermeable to further oxygen contamination. Chromium is a naturally-occurring odorless element found in several forms in rocks, animals, plants, soil, and volcanic dust and gases. There are several forms of chromium, which are described by different numbers in parentheses. The most common forms are elemental chromium (0), chromium (III), and chromium (VI). Chromium (III) occurs naturally in the environment and is an essential nutrient for the human body. Chromium (0) and chromium (VI) are generally produced by industrial processes. On the flip side, chromium can also provide health benefits to humans.
The tanneries established in Unnao and Kanpur have lead to a high rise in the quantity of heavy metals like Chromium as pollutants or