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Phosphates in Water Pollution Phosphates may be created by substituting some or all of the hydrogen of a phosphoric acid by metals Depending on the number of hydrogen atoms that are replaced the resulting compound is described as a primary secondary or tertiary phosphate Primary and secondary phosphates contain hydrogen and are acid salts Secondary and tertiary phosphates with the exception of those of sodium potassium and ammonium are insoluble in water Tertiary sodium phosphate is valuable as a detergent and water softener The primary phosphates tend to be more soluble Phosphates which are an important component to metabolism in both plants and animals help in the first step in oxidation of glucose in the body Primary calcium phosphate is an ingredient of plant fertilizer Phosphates have caused increasing attention recently The focus is on the environmentally harmful effects in household detergents Wastewater from laundering agents contains phosphates which are said to be a water pollutant Most laundry detergents contain approximately 35 to 75 sodium triphosphate Na5P3O10 which serves two purposes Providing an alkaline solution pH 90 to 105 is necessary for effective cleansing and also to tie up calcium and magnesium ions found in natural waters and prevent them from interfering with the cleansing role of the detergent Eutrophication is the progressive over-fertilization of water in which festering masses of algaes blooms choking rivers and lakes Phosphorus compounds act as a fertilizer for all plant life whether free-floating algae or more substantial rooted weeds and are implicated in eutrophication Many countries control phosphate levels whereas Switzerland has banned the use of phosphates The marine environment is both fragile and more resistant than the terrestrial ecosystem It is fragile for the reasons that nutrients are generally present in very low concentrations permanently
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