where do phosphates and nitrates come from ?

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https://www.usgs.gov/mission-areas/water-resources/science/nutrients-and-eutrophication

https://www.usgs.gov/mission-areas/water-resources/science/nutrients-and-eutrophication
Nutrients and Eutrophication | U.S. Geological Survey – USGS.gov
Software News Like people, plants need nutrients, but too much of a good thing can be a problem. Nutrients, such as nitrogen and phosphorus, occur naturally, but most of the nutrients in our waterways come from human activities and sources—fertilizers, wastewater, automobile exhaust, animal waste.

https://www.khanacademy.org/science/biology/ecology/biogeochemical-cycles/a/the-nitrogen-cycle

https://www.khanacademy.org/science/biology/ecology/biogeochemical-cycles/a/the-nitrogen-cycle
The nitrogen cycle (article) | Ecology | Khan Academy
. Nitrogen exists in the atmosphere as N 2 gas. In nitrogen fixation, bacteria convert N 2 into ammonia, a form of nitrogen usable by plants. When animals eat the plants, they acquire usable nitrogen compounds. Nitrogen is a common limiting nutrient in nature, and agriculture.

https://www.britannica.com / science / lake / Sulfates-nitrates-and-phosphates

https://www.britannica.com / science / lake / Sulfates-nitrates-and-phosphates
Lake – Sulfates, Nitrates, Phosphates | Britannica
Lake – Sulfates, Nitrates, Phosphates: Sulfate usually occurs as a principal ion in lake waters. Under anaerobic conditions in which bacteria persist in the oxidation of biological material, hydrogen sulfide is produced.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8835578

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8835578
Highly Efficient Removal of Nitrate and Phosphate to Control …
8 févr. 2022In water, nitrogen and phosphorus often exist in the form of nitrates and phosphates—the organic or inorganic compounds that contain nitrogen or phosphorus. Nitrate in water is primarily used by algae and fish to synthesize protein, but excessive nitrate in water can also cause severe illness in infants and domestic animals.

https://www.britannica.com/video/167748/overview-phosphorus-nitrogen-cycles-biosphere

https://www.britannica.com/video/167748/overview-phosphorus-nitrogen-cycles-biosphere
Nitrogen and phosphorus biogeochemical processes explored
Encyclopædia Britannica, Inc. Follow the nitrogen and phosphorus cycles and learn why farmers fertilize fields to keep them productive Understand how crop rotation in organic farming benefits the farmers as well as the environment and particularly the advantages of growing lentils vertical farming

https://pubs.usgs.gov/fs/fs218-96

https://pubs.usgs.gov/fs/fs218-96
USGS Fact Sheet FS218-96
All living things need nitrogen and phosphorus, two of eh most important nutrients. However, an access of these nutrients can cause tow main te s of water-quality problems: degraded aquatic habitat and polluted drinking water. In addition, economic and recreational problems, such as clogged intake pies and water that are unfit for swimming …

https://www.westcumbriariverstrust.org/assets/content/projects/file/Phosphates and Nitrates-20140609152524.pdf

https://www.westcumbriariverstrust.org/assets/content/projects/file/Phosphates and Nitrates-20140609152524.pdf
PDF Phosphates and Nitrates – West Cumbria Rivers Trust
What locations are affected? Nitrates: Highest levels in the driest parts of England (south and east), which are dominated by crop farming. Coasts and estuaries are also particularly sensitive to high nitrate levels. Phosphates: The Midlands, the South East and East Anglia are worst affected. Why should this concern me?

https://www.bbc.co.uk/bitesize/guides/z3w4k7h/revision/6

https://www.bbc.co.uk/bitesize/guides/z3w4k7h/revision/6
Structure of plants – WJEC Plant nutrients – BBC
Nitrates: Nitrogen, N: Nitrogen is needed to make amino acids for proteins, which are needed for cell growth: Phosphates: Phosphorus, P: Phosphorus is needed to make DNA and cell membranes …

https://pubmed.ncbi.nlm.nih.gov/34455120

https://pubmed.ncbi.nlm.nih.gov/34455120
Nitrates in the environment: A critical review of their distribution …
The presence of nitrate in high concentrations in surface and groundwater triggers several health problems, for instance, methemoglobinemia, diabetes, eruption of infectious disorders, harmfully influence aquatic organisms. Sensing nitrate is an alternate option for monitoring the distribution of in different water bodies.

https://en.wikipedia.org/wiki/Phosphate

https://en.wikipedia.org/wiki/Phosphate
Phosphate – Wikipedia
In organic chemistry, phosphate or orthophosphate is an organophosphate, an ester of orthophosphoric acid of the form PO 4 RR′R″ where one or more hydrogen atoms are replaced by organic groups. An example is trimethyl phosphate, (CH 3) 3 PO 4.The term also refers to the trivalent functional group OP(O-) 3 in such esters. may contain sulfur in place of one or more oxygen atoms … lesoutrali bot