In fact, there are many metals in the human body, such as iron, zinc, and lead. So, is it okay to have more of these metals in the body? When you are familiar with the dangers of heavy metals, you may not think that way anymore! In this chapter, the manufacturer of water quality online monitoring instruments will mainly discuss the harm and determination of heavy metals in water with you!
We know that water is a vital resource that we depend on to survive. In unpolluted water, the concentration of heavy metals depends on the interaction between water and the metal. Its value is generally low and does not harm the body. However, with the development of industry, industrial wastewater and domestic sewage have caused serious water pollution. This polluted water enters the human body through drinking water, posing a certain threat to human health.
Heavy metals refer to about 60 elements with a density of 4.0 or more, or 45 elements with a density of 5.0 or more. Among them, arsenic and selenium are non-metals, but because of their toxicity and certain properties similar to heavy metals, they are also included in the scope of heavy metal pollutants. In environmental pollution, the term “heavy metals” emphasizes their toxicity to ecosystems and mainly refers to mercury, cadmium, lead, chromium, and the non-metal arsenic, as well as other toxic heavy metals such as zinc, copper, cobalt, nickel, tin, and vanadium.
China’s “Drinking Water Hygiene Standards” and “Comprehensive Discharge Standards for Water Pollution” have set limits on the content of heavy metal elements in drinking water and the high allowable discharge concentration of heavy metal elements in wastewater, respectively. Therefore, the current situation requires the detection means and real-time monitoring of heavy metal ions to be implemented!
The water samples were injected into the digestion tank by injection pump, and then the reducing agent was injected to reduce the various forms of heavy metals in the water to the same valence state. Secondly, the buffer solution is injected again, adjusted to the appropriate PH value, and then the characteristic color developer is added, and the heavy metal in the water and the color developer generate an orange-yellow complex, and then the color change of the sub-orange-yellow complex is measured with the photoelectric colorimeter at a certain wavelength, and the heavy metal content in the water is calculated according to the Lambert-Beer law.
Hangzhou Moody Technology is the production of water quality online monitor manufacturers, which monitoring heavy metal instruments, is based on different parameters to produce the corresponding water quality monitor equipment, such as: antimony online analyzer in water, nickel online analyzer in water, total silver online monitor, iron ion online analyzer and so on!
