Ammonia nitrogen has always been one of the important indicators of water quality safety monitoring, so where is its main source? How to monitor it online. The following water quality online monitoring instrument manufacturers to understand the relevant issues with you.
In fact, the source of ammonia nitrogen in wastewater is not a single way. With the continuous development of economy, more and more nitrogen-containing pollutants are discharged arbitrarily, which brings great harm to the environment. Nitrogen exists in many forms in wastewater, such as organic nitrogen, ammonia nitrogen and nitrate nitrogen, and ammonia nitrogen is one of the main forms.
Ammonia nitrogen in wastewater refers to nitrogen in the form of free ammonia and ionic ammonium. The main sources are the decomposition of nitrogen organic matter in domestic sewage, industrial wastewater such as coking and synthetic nitrogen, and farmland drainage. There are many sources of ammonia nitrogen pollution, and the emission is large, and the emission concentration will also change greatly. The polluted water discharged into the water body not only causes the eutrophication of the water body, resulting in black and odorous water body, but also increases the difficulty and cost of water supply treatment, and even produces toxic effects on people and organisms.
The formation of ammonia nitrogen wastewater is generally caused by the co-existence of ammonia water and inorganic ammonia. Generally, the main source of ammonia nitrogen in wastewater with pH above neutral is the joint action of inorganic ammonia and ammonia water. Under acidic pH conditions, ammonia nitrogen in wastewater is mainly caused by inorganic ammonia.
There are two main components of ammonia nitrogen in wastewater, one is ammonia nitrogen formed by ammonia water, and the other is ammonia nitrogen formed by inorganic ammonia, mainly ammonium sulfate, ammonium chloride and so on.
As for how to monitor ammonia nitrogen in water, this is, of course, to use the water quality online monitor. As for the monitoring methods, there are many, such as potassium persulfate oxidation UV-VIS spectroscopy: the water sample is sent to the ammonia nitrogen digestion tank after the pretreatment device, and then potassium dichromate is added, and the ammonia nitrogen concentration in the water is determined by colorimetry in the presence of silver salt and mercury salt. At the same time, the water sample was taken into the colorimetric tank, and the sodium reagent or salicylic acid was added for the colorimetric determination of ammonia nitrogen. The degree of change of the color of the solution in the remeasurement range is proportional to the concentration of ammonia nitrogen in the water sample, and the content of ammonia nitrogen in the water sample can be calculated by measuring the absorbance of the solution.
Of course, in addition to the above potassium persulfate oxidation UV-VIS spectroscopy method, Modi also has the production of ammonia nitrogen online monitors for expulsion colorimetry, salicylic acid, and Nahrmann reagent methods.
