The status of arsenic poisoning in China

@inproceedings{Niu1997TheSO,
  title={The status of arsenic poisoning in China},
  author={S Niu and Shouren Cao and E L Shen},
  year={1997}
}
The first case of chronic arsenic poisoning from drinking-water in the mainland of China was recognized in the early 1980s in a remote area under cultivation in Xinjiang province, where the arsenic levels in deep well water were over 0.6mg/L (Wang, 1984). In the early 1990s, this kind of arsenic poisoning was found in many other places in Inner Mongolia as well as in Shanxi provinces. At about the same time there were reports from local anti-epidemic stations in Guizhou province concerning… 

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References

WHO guidelines for drinking-water quality.

In soil, fertilizers containing inorganic nitrogen and wastes containing organic nitrogen are first decomposed to give ammonia, which is then oxidized to nitrite and nitrate, which are taken up by plants and used in the synthesis of organic nitrogenous compounds.