With the growth of the world's population and the development of industrial and agricultural production, water consumption is also growing. At the same time, due to human production and life, the pollution of the surface and groundwater bodies, the deterioration of water quality, and the limited water resources are even more tense. In the case of such a shortage of water resources, we must cherish water resources more, and at the same time, the inspection department does a good job in testing and provides protection for the health of the people.
Water testing is a matter of people's livelihood, and it should not be underestimated. This is its significance. Water quality testing refers to the uniform or irregular detection of chemical substances, suspended solids, sediments and water ecosystems in water, determination of the types, concentrations and trends of pollutants in water, and assessment of water quality. The main monitoring items can be divided into two categories: 1. Comprehensive indicators reflecting water quality, such as temperature, color, turbidity, DH value, conductivity, suspended solids, dissolved oxygen, chemical oxygen demand, etc.; Toxic substances such as phenol, cyanide, arsenic, lead, chromium, cadmium, mercury and organic pesticides.
Water quality monitoring plays a vital role in water environmental protection, water pollution control, and maintaining water environment health. For drinking water, if the water contains harmful bacteria, such as typhoid, cholera, dysentery and other pathogens, it will spread various infectious diseases. When there are a lot of plankton in the water (such as protozoa, algae, etc.), it will affect the physical properties of the water. And produce odor and water color. If the water contains certain mineral salts, it can cause various diseases. If the content of fluorine in drinking water is too much, it will cause markings on the teeth, which will cause "plaque disease". In severe cases, the teeth will completely collapse. As for the sewage discharged from daily life, it also spreads diseases. Therefore, monitoring the compliance of drinking water quality with drinking water standards is of great significance to ensuring people's drinking water safety.
For industrial water, there are different requirements for water quality due to different industrial production uses. For example, boiler water can not contain a large amount of calcium and magnesium sulfate, otherwise scale will be generated inside the boiler, which will not only consume too much fuel, but also may cause the boiler to explode; for example, the cooling equipment in the metallurgical plant, the suspended matter in the feed water The content is very strict. Therefore, monitoring the quality of industrial water is of great significance in preventing industrial water from affecting product quality or damaging containers and pipelines.
Water is closely related to human health, but all sorts of pollution keeps water out of the safe. How can we detect the “disease” of family water quality in time to avoid affecting the health of our family? Here are some small ways:
1. Look: Use a transparent glass to pick up a glass of water. Look at the light for any color or suspended matter. After standing for three hours, check if there is any sediment or scale on the bottom of the cup. If there is, the impurities in the water are exceeded.
2. View: Observe whether the tea in the night is black or whether there is rust-colored theophylline in the cup mouth. If the tea is black or has theophylline, it means that the iron and manganese metal in the water exceeds the standard.
3. Smell: Smell if there is any smell in the water. If you smell the bleaching powder (chlorine), it means that there is residual chlorine in the water. When boiling water, it is easy to produce carcinogens such as chloroform.
4. Taste: Is there a feeling of innocence when drinking bottled water? If so, the pH value of the water is abnormal; if you drink diarrhea often, you should consider whether the bacteria or virus in the water exceeds the standard.
5, check: check the water heater, kettle, ceramic utensils, the inner wall of the water has no scale, water stains? If yes, the water hardness (calcium, magnesium ions) is too high, easy to produce stones in the human body and affect the life of household appliances!