What was the impact of the removal of histrate?
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Nitrates can be removed by ion exchange using strong anionic resin in Cl- form. Reverse Osmosis is also efficient to remova nitrates, although the hydrophilic properties of the molecule does not allow an optimal removal. Biological denitrification is used in municipal waste water treatment plant.
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Intrusions of land-hungry settlers, treaties with the U.S., and the Indian Removal Act (1830) resulted in the forced removal and migration of many eastern Indian nations to lands west of the Mississippi.
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