Nowadays, with the rapid development of industries, large
amounts of high ammonium nitrogen contaminated wastewater
are produced, especially in the rare earth, catalyst, chemical, and
steel industries. The concentration of ammonium nitrogen is normally
higher than 5000 mg L1, even more that the concentration
would reach 34,000 mg L1 in such as rare earth wastewater and
thus face difficult treatment [1,2]. High ammonium nitrogen
wastewater will seriously pollute the environment if it is discharged
into natural water bodies without treatment. As an inorganic
nutrient, excessive ammonium nitrogen can cause severe
problems such as eutrophication, depletion of dissolved oxygen,
and toxicity in aquatic animals from lakes, rivers, and other water
bodies [3].
Nowadays, with the rapid development of industries, largeamounts of high ammonium nitrogen contaminated wastewaterare produced, especially in the rare earth, catalyst, chemical, andsteel industries. The concentration of ammonium nitrogen is normallyhigher than 5000 mg L1, even more that the concentrationwould reach 34,000 mg L1 in such as rare earth wastewater andthus face difficult treatment [1,2]. High ammonium nitrogenwastewater will seriously pollute the environment if it is dischargedinto natural water bodies without treatment. As an inorganicnutrient, excessive ammonium nitrogen can cause severeproblems such as eutrophication, depletion of dissolved oxygen,and toxicity in aquatic animals from lakes, rivers, and other waterbodies [3].
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