There are many types of pollutants in water, and once they exceed the standard, they can be harmful. It is generally divided into five categories: inorganic pollutants, pathogenic microorganisms, plant nutrients, oxygen consuming pollutants, and heavy metal ions.
·Inorganic pollutants mainly come from wastewater discharged from factories such as electroplating, coking, and plastics. If there is an excess of inorganic pollutants in the water, it will change the pH value of the water, making it difficult for microorganisms to grow normally and consuming dissolved oxygen in the water, directly endangering freshwater organisms.
·Pathogenic microorganisms mainly come from biological products, livestock farms, and domestic sewage, including various types of pathogens, viruses, and parasites. Easy to cause various infectious diseases.
·Plant nutrients mainly come from food, industrial wastewater, and domestic sewage. The accumulation of nutrients inside the water can cause eutrophication, leading to the proliferation of algae and deterioration of water quality.
·Oxygen consuming pollutants mainly come from wastewater and domestic sewage discharged from the food industry, papermaking industry, and chemical fiber industry, such as carbohydrates, proteins, fats, lignin, cellulose, etc. When microorganisms decompose these organic compounds in water, they consume the dissolved oxygen in the water, causing oxygen deficiency and the production of gases such as hydrogen sulfide and ammonia, leading to deterioration of water quality.
·The main sources of heavy metal ions include agricultural, pharmaceutical, instrumentation, and wastewater from various non-ferrous metal mines, such as mercury, cadmium, chromium, lead, arsenic, and other heavy metal ion toxins. They are relatively stable in water and are highly toxic substances that pollute water bodies.
So, the parameters for online water quality monitoring vary from place to place. The monitoring parameters of surface water mainly include dissolved oxygen, pH, turbidity, conductivity, temperature, permanganate index, ammonia nitrogen, total nitrogen, total phosphorus, followed by some heavy metals such as lead, cadmium, mercury, arsenic, chromium, and organic or anionic substances such as volatile phenols, cyanide, chloride, fluoride, etc.
Related products for online water quality monitoring:
Hangzhou Modi-Tech Co., Ltd. is a comprehensive technology company that develops, produces, and sells various water quality analysis instruments. The self-developed and produced water quality analyzers are widely used for water quality safety monitoring in different industries.
The main products include: total phosphorus online analyzer, total nitrogen online analyzer, ammonia nitrogen online detector, heavy metal online detector in water, total residual chlorine online analyzer, etc.
