Environmental impact of foam plastics reprocessing
Environmental impact of foam plastics reprocessingAt present, the production of foam has been a small production process of pollution, but the investment is large, if absolute pollution is impossible! Production waste and sewage discharge contain many toxic components, because the sodium stearate in it reacts with oxygen nitrogen to form toxic substance. It is a complex compound, but it is a slow process.Moreover, the "waste foam" is the so-called "white pollution", there is a lot of harm.
In addition, due to the difficult degradation of disposable plastic tableware, many cities are now promoting the use of green tableware - paper tableware, the principle is the composition of paper products, cellulose can be degraded by microorganisms. However, it is unwise to use paper tableware instead of foamed plastic tableware. First of all, paper tableware also brings visual pollution. Their degradation rate is not very fast, and they often do not degrade thoroughly in dozens of days or even months. Secondly, the paper tableware, in addition to straw pulp, rice pulp, but also to join about 1/3 of wood pulp, if fully promoted, will inevitably cause a large number of wood consumption, leading to deforestation intensified. But our country forest coverage rate is only 13.92%, the per capita forest area is only equivalent to the world average per capita level 17.2%. Third, the pulp system has always been a large water consumption, energy consumption and large sewage. The pulping process requires a great deal of water, while China is a country with a shortage of water resources. If the sewage is not treated and discharged into the river directly, it will cause water pollution. The paper tableware needs to be dried immediately after molding, which will require a great deal of energy. China's energy structure is dominated by coal, which will increase the content of SO2 in the air, causing acid rain.
Landfill operation is still one of the main methods for municipal solid waste treatment in our country. Because the plastic film of low density, large volume, it can quickly fill up space and reduce landfill site waste disposal capacity; and, after the landfill site because the ground is soft, bacteria, viruses and other harmful substances in the waste is easy to seep into the ground, groundwater pollution, endanger the surrounding environment.If the waste plastics are burned directly, it will cause serious two pollution to the environment. Plastics burn not only a great deal of black smoke, but also dioxin, the most toxic substance to date. Dioxins enter the soil for at least 15 months to decompose gradually. They can damage plants and crops. Dioxins can cause severe damage to the liver and brain of animals. The environmental pollution of dioxin emitted from waste incineration has become a very sensitive issue all over the world.
When people are exposed to vinyl chloride, there will be a wrist, finger edema, skin sclerosis and other symptoms may also occur splenomegaly and liver injury disease. In our country, the ultra-thin plastic bags we use almost all come from the reuse of waste plastics. They are produced by small businesses or family workshops. The raw materials used in these factories are waste plastic barrels, pots, disposable syringes, etc.. Production, first used machinery to crush the raw material of plastic particles, plastic particles and then placed in a pool cleaning (called disinfection), check out the sun, and then the mechanical pressure it film, made of a variety of plastic bags. Every meal, many people use plastic bags of food, they do not know this behavior, not only harmful to the environment, but also harm their own bodies.Make the soil environment worse, and seriously affect the growth of crops. The degradation time of plastic products used in China usually takes at least 200 years. Waste plastic, plastic bags in the field long residue in Tanaka, will affect the absorption of water and nutrient of crops, inhibit the growth and development of crops, resulting in crop production. If the animal eats plastic film, it can cause the digestive tract disease and even death of the livestock.
