Water quality testing instruments are important tools for assessing water quality and ensuring water resource safety. They are like loyal guards, constantly monitoring various indicators in the water to protect environmental protection and human health.
1. The main content of water quality testing
Water quality testing instruments usually test the following indicators:
Physical indicators:
Temperature: Water temperature affects the survival and reproduction of aquatic organisms. Too high or too low temperature will have an adverse effect on the ecosystem.
Chromaticity: The color of water can reflect the content of soluble substances and suspended matter in water. Too high chromaticity may indicate that the water body is polluted.
Turbidity: Turbidity reflects the content of suspended matter in water. Too high turbidity will affect the transparency and sensory properties of water.
Conductivity: Conductivity reflects the content of soluble salts in water. Too high conductivity may indicate that the water body is polluted by industrial wastewater or agricultural non-point sources.
Chemical indicators:
pH value: pH value reflects the acidity and alkalinity of water. Too high or too low pH value will affect the survival of aquatic organisms and the self-purification ability of water bodies.
Dissolved oxygen (DO): Dissolved oxygen is a necessary condition for the survival of aquatic organisms. Too low dissolved oxygen will cause hypoxia in the water body, affecting the survival of aquatic organisms.
Chemical oxygen demand (COD): COD reflects the content of organic matter in water. Too high COD indicates that the water body is polluted by organic matter.
Biochemical oxygen demand (BOD): BOD reflects the content of biodegradable organic matter in water. Too high BOD indicates that the water body is polluted by organic matter and may consume a lot of dissolved oxygen.
Ammonia nitrogen: Ammonia nitrogen is a common pollutant in water bodies, mainly from domestic sewage and agricultural non-point source pollution. Excessive ammonia nitrogen will cause poisoning to aquatic organisms.
Total phosphorus: Total phosphorus is the main limiting factor for eutrophication of water bodies. Too high total phosphorus will cause a large number of algae in water bodies to reproduce and cause algal blooms.
Heavy metals: Heavy metals such as lead, mercury, and cadmium are toxic and can accumulate in organisms, causing harm to human health and the ecological environment.
Biological indicators:
Coliform bacteria: Coliform bacteria are indicator bacteria that reflect the degree of fecal contamination in water bodies. Excessive coliform bacteria indicate that the water body may contain pathogenic microorganisms.
Algae: Algae are an important part of the aquatic ecosystem, but excessive reproduction of certain algae can cause algal blooms, affecting water quality and the health of the aquatic ecosystem.
2. Impact of exceeding the standard of each value
Impact on human health: Exceeding the standard of water quality can lead to drinking water safety problems and cause various diseases, such as diarrhea, hepatitis, and cancer.
Impact on the ecological environment: Exceeding the standard of water quality can destroy the balance of the aquatic ecosystem, leading to the death of aquatic organisms, the decline of biodiversity, and even causing ecological disasters such as algal blooms and red tides.
3. Summary
Water quality testing instruments are an important tool for ensuring the safety of water resources. By monitoring water quality indicators, water pollution problems can be discovered in a timely manner and effective measures can be taken to control them. Protecting water resources is everyone's responsibility. Let us work together to protect the source of life.