Mercury in Water

Mercury as a Contaminant in Water

Mercury is a naturally occurring metal that has several forms. The metallic mercury is ashiny, silver-white, odorless liquid. If heated, it is a colorless, odorless gas.Mercury combines with other elements to form inorganic mercury compounds. Mercury alsocombines with carbon to make organic mercury compounds. The most common form oforganic mercury, methyl mercury, is produced mainly […]

Arsenic in Water

Arsenic as a Water Contaminant

Arsenic (As)When pH = 6-10The presence of arsenic (As) in nature is due mainly to natural deposits of metalloids in the earth’scrust and usually in ancient rock formations. Arsenic enters ground water through erosion or from manmade sources such as wood preservative, petroleum production, semi-conductor manufacture or due tomisuse of animal feed additives and arsenic-containing […]

Selenium in Water

Selenium as a Water Contaminant

Selenium (Se)selenate (SeO42-)biselenite (HSeO3-)selenite (SeO32-) Selenium is a metal found in natural deposits as ores containing other elements. The greatest use ofselenium compounds is in electronic and photocopier components, but they are widely used in otherproducts as well. Selenium releases to the environment have been primarily from copper smeltingindustries. The largest releases from 1987 to […]

Common Water Contaminants Silver in Water

Silver as a Contaminant in Water

Silver (Ag)Ag+Biologically, silver is a nonessential, non-beneficial element to humans. There are no scientificstudies to show adverse health due to its presence in drinking water from natural sources. However,because of its bactericidal abilities, silver is used as a water bacteriostat in carbon containing waterfilters. The silver is deposited onto the carbon granules to inhibit the […]