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Heavy water (deuterium oxide (2H 2O) or D 2O) is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium (2H or D, also known as heavy hydrogen), rather than the common hydrogen-1 isotope (1H or H, also called protium) that makes up most of the hydrogen in regular water.
contamintaion of heavy metal by sewage and other organic matters or excrements water of Halali. reservoir is used for drinking as well as irrigational purpose, its water is polluted by man made. activities e.g. sewage disposal industrial and natural contaminants mixes into water heavy metals. viz.