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Sunday, 12 January 2014

Phosphates

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 result ting compound is described as a primary , secondary or tertiary phosphate . Primary and secondary phosphates and hydrogen containers are acid salts . Secondary and tertiary phosphates , with the exception of Those of sodium, potassium andammonium are insoluble in water. Tertiary sodium phosphate is valuable as a detergent and water softener . The primary phosphates tend to be more soluble .
        
Phosphates , All which are an important component to metabolism in both plants and animals , help in the first step in the oxidation of glucose in the body . Primary calcium phosphate is an ingredient of fertilizer plant .
        
Phosphates have Caused increase increasing attention recently. The focus is on the environmentally harmful effects in household detergents . Wastewater , from laundering agents , contains phosphates , All which are said to be a water pollutant .
        
Most laundry detergents containerization Approximately 35 % to 75 % sodiumtriphosphate ( Na5P3O10 ) All which serves two purposes. Providing an alkaline solution ( pH 9.0 to 10.5) is Necessary for effective cleansing and usefull to tie up calcium and magnesium ions found in natural waters and preventable them from interfering with the cleansing role of the detergent .
        
Eutrophication is the progressive over- fertilization or water, All which festering masses of algae 's blooms , choking rivers and lakes . Phosphorus compounds act as a fertilizer for all plant life , Whether free-floating algae or more substantialism rooted weeds , and are implicated in eutrophication . Many countries control phosphate levels , WhereasSwitzerland 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 gene rally present in very low concentrations No , Permanently Consumed by living organisms and pollutants diffuse rapidly .
        
Lakes and rivers are extremely complex ecosystems . Nutrients are taken up by both algae and rooted weeds . The weeds act as a shelter for fish larvae and zooplankton , or both All which eat algae and are , in turn , eaten by larger fish . Scientists have Concluded That unpolluted lakes can absorb surprisingly large amounts of phosphates without uncertainty . When a fertilizer , zoals a phosphate is added more algae will grow ,and consequently will the populations of zooplankton and fish . Difficulties Arise only when the lake is already impure . Zooplankton are sensitive to Their environment and many substances are toxic to them . If any thesis or substances , -including phosphates , are present the zooplankton population can not increasement . Adding phosphates to this polluted system will case algae growth . The floating masses cut off the light supply . Weeds that decompose and using up dissolved oxygen , and causing sulfurous smells and plagues . Deprived of shelter and food , the fish larvae starve . The lake is well on the way to catastrophe .
        
Without wetlands, there would be a minimal amount of fresh drinking water due to the factthat wetlands filter the water of our lakes , rivers and streams , sequentially Reducing contamination or water . The plant growth in wetlands removes phosphates and other plant nutrients washed in from the surrounding soil , consequently Restrictingthe growth of algae and aquatic weeds . This growth is a serious problem in some of Canada's major waterways , where dead and decaying algae deprive the deeper waters their fiduciary oxygen .
        
Researches at Lancaster University have Studied lakes All whose plant and animal life has been killed by acid rain . The excess acid in the lakes can be easily Neutralized by adding lime , but this makes the water rich in calcium. Gradually life will return to the lake but , as thesis lakes shouldhave low calcium levels , it will not be the same childof life That Existed in lakes before pollution . The answer , theyhave Concluded , is to add phosphates .
        
These phosphates work by shielding the water . This depends upon nitrate ions in the lake . Contradictory , thesis usefull ions are produced by acid rain , containerization oxides of nitrogen from combustion sources . These fertilizers do not alter the pH level of the water . Instead , they Stimulate the growth of plants . The plants absorb the dissolved nitrates , generating hydroxide ions , All which in return Neutralize the excess acid .
        
Removal of phosphates from detergents is not likely to slow growth in algae containing substances . It May actually prove disastrous . Its replacement with borax will definitely be disastrous . Scientists are unsure or borax role in plant growth . It is not required by algae and other micro- plants , but it is essential to higher plants . However inexcessive quantities , about 5 micrograms of boron per gram of water , boron severely damages plant life . Highly alkaline substances , gel proteins and sodium hydroxide is hazardous substances . Another concern is the factthat each year thou sands of children swallow detergents result in serious injuries or death ting .
        
In conclusion , the only way to over come the disastrous effects of phosphates is to find an alternate . However , an acceptable substitute for phosphates has not yet beenfound . Washing only with synthetic detergents would require so much detergent That the cost per wash would increasement Significantly . Another alternative is the substitution ofnonionic synthetic detergents for ionic detergents in use . Nonionic detergents are not precipitated by calcium or magnesium ions . This would reduce the risk contaminating our lakes and rivers .

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