[ Date Time : 2015-9-30 ] [ Comments : 0
PCB properties and uses
PCB is an industrial chemical that is as follows:
〔1〕Heat transfer is strong, but not transmit power
〔2〕Not easy to burn
〔3〕Properties of stability, there would be no chemical changes
〔4〕Is not soluble in water, is a fat soluble substances
Based on the above properties, the industrial sector was initially treated as a PCB for the divine treasure, is widely used as a dielectric, placed in the electronic apparatus such as capacitors and transformers, or as a heat exchange fluid to adjust the operating temperature of the instrument.
In the early days, people didn't know that PCB was toxic and had not been prevented, while a large number of PCB wastes were dumped in the ocean, until the production of PCB's workers began to fall ill,As well as environmental scientists have found that the PCB content of the oceans, the people began to look at the problems caused by PCB.
PCB how to enter the human body
The landfill accumulated a lot of waste PCB, releases gas. Over time, these wastes will flow into the lake or the ocean. Because PCB is not soluble in water, but soluble in oil, resulting in the accumulation of organisms in the ocean, in particular, the larger size of the organisms, such as sharks and dolphins, etc.We eat this kind of deep-sea fish, or eating other contaminated food, including dairy products, meat fat, oil and other will inhalation of PCB. PCB is stored in the body of human adipose tissue, pregnancy can be transmitted through the placenta to the fetus, also released in human milk.
The pollution of PCB is the result of years of accumulation, it can be said to be global, almost all food is contaminated, it is very difficult to completely avoid. What we can do is to pay attention to the food we eat, enhance the awareness of environmental protection and concern, and hope that the decision makers can make appropriate control.