White pollution is a disposable plastic packaging that is difficult to degrade. For example, disposable foamed tableware and plastic bags are commonly used. It seriously pollutes the environment, and it is difficult to decompose when buried in soil, which will lead to the decrease of soil capacity. If burned, it will lead to air pollution. So now it is recommended not to use it or use it less. It is best to bring your own tools to buy things and reduce its utilization rate.
First, the status quo and harm of "white pollution"
As a new type of material, plastic products have the advantages of light weight, waterproof, durability, mature production technology and low cost, and are widely used all over the world, with an increasing trend year by year. The growth rate of plastic packaging materials in the world market is higher than other packaging materials. The average annual growth rate of plastic packaging materials from 1990 to 1995 was 8.9%.
China is one of the top ten countries producing and consuming plastic products in the world. 195 China's plastic output was 5190,000 tons, and nearly 6 million tons of plastics came to Japan. In that year, the total consumption of plastics in China was about 1 1 10,000 tons, including 2 1 1 10,000 tons of packaging plastics. Most packaging plastics are discarded in the environment in the form of waste films, plastic bags and foamed plastic tableware. These waste plastic packages are scattered in urban areas, scenic tourist areas, water bodies and roads, which not only affect the landscape and cause "visual pollution", but also cause potential harm to the ecological environment because it is difficult to degrade.
According to the survey, 3% of Beijing's domestic garbage is packed in waste plastics, with an annual total of about 6,543,800 tons. 7% of Shanghai's domestic waste is packaged in waste plastics, with an annual total of about 6,543,800 tons. In Tianjin, the annual waste plastic packaging also exceeds 6,543,800 tons. Every year in Beijing, about 2.3 billion plastic bags, 220 million disposable plastic tableware and 6.75 million square meters of discarded agricultural films are discarded in the environment. People jokingly call it "suburban white."
The main hazards of "white pollution" are "visual pollution" and "potential hazards";
1, "visual pollution". Waste plastic packaging materials scattered in cities, tourist areas, water bodies and roads bring people bad vision, affect the overall aesthetic feeling of cities and scenic spots, and destroy the cityscape, thus causing "visual pollution".
2. "Potential danger". Waste plastic packaging is difficult to degrade after entering the environment, resulting in long-term and deep-seated ecological and environmental problems. First of all, the mixing of waste plastic packaging materials into soil will affect the absorption of nutrients and water by crops, leading to crop yield reduction; Second, waste plastic packaging on land or in water is swallowed by animals as food, which leads to animal death (such cases are common in zoos, pastoral areas and oceans); Thirdly, it is difficult to package and treat the waste plastics mixed with domestic garbage: landfill will occupy a lot of land for a long time, domestic garbage mixed with plastic is not suitable for composting, and it is difficult to recycle the classified waste plastics because it cannot guarantee the quality.
At present, people have a strong reaction to the problem of "visual pollution", but most people still lack understanding of the long-term and deep-seated "potential harm" of waste plastic packaging.
Two, the general practice of prevention and control of "white pollution" at home and abroad
1, prevention and control of "white pollution" abroad.
As early as 1985, the average consumption of plastic packaging in the United States reached 23.4 kg, that in Japan was 20. 1 kg and that in Europe was 15 kg. In 1990s, the per capita consumption of plastic packaging materials in developed countries was higher (the per capita consumption of plastic packaging materials and other plastic products in China was 13.5438+02kg). From the perspective of consumption, it seems that the "white pollution" in developed countries should be very serious, but it is not. The reasons are as follows: First, the city appearance management in developed countries has been strict for a long time, and few people casually throw away discarded plastic packaging materials, basically putting an end to "visual pollution". Second, the harmless treatment rate of domestic garbage in developed countries is high. Take the United States as an example Before 1980s, the main way to treat waste plastics was landfill. Later, it was found that plastics did not degrade for a long time. After the 1990s, they turned to recycling.
At present, a strict classification and recycling system has been established, most of the waste plastic packaging materials have been recycled, and a small part of them have been converted into energy or treated harmlessly in other ways, basically eliminating the potential harm of waste plastic packaging materials.
The United States has enacted the Law on Resource Protection and Recovery, which clearly stipulates the technical research, system construction, operation and development planning of solid waste management, resource recovery and resource protection. California, Maine, new york and other states 10 have successively introduced the deposit system for recycling packaging supplies. Japan's renewable resources law, energy protection and renewable resources support law, packaging capacity ......
How to deal with white garbage
Recycling "white pollution" means that a large number of plastic films, plastic bags and disposable plastic tableware are used for waste packaging (collectively referred to as plastic packaging) and used mulch films are collectively referred to as "white pollution". "White pollution" will cause two kinds of harm to the environment, namely "visual pollution" and "potential harm". Visual hazard refers to the damage of waste plastic products scattered in the environment to the city appearance and landscape Waste plastics scattered around big cities, tourist areas, water bodies and railways bring people bad vision and affect the overall aesthetic feeling of cities and scenic spots. Potential harm refers to the long-term deep-seated environmental problems caused by the difficulty of degradation of waste plastic products after they enter the natural environment. First of all, the waste plastic products in the soil affect the absorption of nutrients and water by crops, leading to crop yield reduction. Second, waste plastic products abandoned on land or in water are passively swallowed as food, leading to animal death. Third, it is difficult to treat the waste plastic products that enter the domestic garbage. If it is buried, it will occupy the land and will not degrade for a long time. Domestic garbage mixed with plastics is also not suitable for composting. Waste plastics separated from garbage have low utilization value because they cannot guarantee quality. Controlling "white pollution" is a social systematic project, and active countermeasures should be taken to comprehensively control it by administrative, scientific and economic means. At present, under the premise of strengthening management, formulating relevant policies and regulations, cultivating the development of enterprises and institutions conducive to environmental protection, raising people's awareness of environmental protection, and grasping the correct direction of public opinion, we should learn from foreign management countermeasures of reduction, recycling, recycling and degradation, and implement countermeasures of resource conservation (volume reduction), recycling (recycling), harmlessness (degradation) and combination of prevention and control. 1. Saving resources (capacity reduction and reduction) is a good way to nip in the bud and start from the source. Resource saving (capacity reduction and reduction) means reducing or inhibiting the production of plastic waste, including using less, that is, using as little as possible or using less; Or by filling natural organic materials or inorganic materials, the consumption of plastic packaging can be reduced, or by improving product quality, increasing functions and prolonging service life, one thing can be used for multiple purposes. Thinning, that is, on the premise of ensuring the application performance, by changing the formula of raw materials and the design of product structure, the product is lightweight and thin-walled. Volume reduction refers to reducing the volume of plastic waste by compaction, dissolution and defoaming, and developing suitable packaging to inhibit over-packaging. 2. Recovery (recycling) is an important measure of environmental protection. Recycling is not only a technical problem, but also a set of systematic engineering problems including legislation, recycling, production, inspection and sales. It is an effective way for countries to actively develop, ensure the sustainable development of national economy and coordinate economy, resources and environment. Generally speaking, a considerable part of plastic waste is easy to recycle. However, for disposable plastic waste, it must be recycled as much as possible according to the types, quality, quantity, flow direction and treatment methods of garbage in various places. It is easy to recycle, has recycling value and is economical, including materials, heat energy, fuel oil and chemicals. This is not only conducive to environmental protection, but also of great significance from the perspective of saving the limited resources of the earth and effectively utilizing renewable resources. However, at present, recycling will face many technical and economic problems in garbage classification, collection, establishment of recycling system, research and development of efficient recycling technology and equipment, and product direction of recycled materials. This requires * * * and the people to increase investment in science and technology and jointly solve it as a key problem. 3. Harmless (degradable) In real life, there are many disposable plastic wastes that are difficult to collect, such as compost bags, garbage bags, supermarkets and light plastic bags used in the morning market. Even those with poor or no economic benefits, such as tableware and plastic film in China. , more suitable for these fields. After ten years of follow-up application practice, it is proved that the degradable plastics developed in China have the following characteristics: ① practicability: its application performance and sanitary performance are similar or equivalent to those of ordinary plastics; (2) Degradability: after the use function is completed, it can be rapidly degraded under natural environmental conditions and become harmless fragments or fragments easily absorbed by the environment; ③ Safety: the substances generated in the process of degradation and remaining after degradation are harmless to the environment or have no potential harm; ④ Economy: The price is equal to or slightly higher than that of similar ordinary plastic products. Therefore, for those disposable plastic products that are large, scattered, chaotic, difficult to collect or economically unreasonable even if forced to collect, it is suggested to use degradable plastics, which can be degraded and broken into harmless fragments in a short time to reduce the volume and quantity of plastic waste. ......
Is there any way to reduce white garbage?
Centennial problem of white garbage
In recent years, a large number of discarded packaging plastic films, plastic bags and disposable non-degradable plastic tableware have been used rapidly and discarded at will, which has generally caused serious white pollution in large and medium-sized cities. Together with automobile exhaust and phosphorus-containing detergent, it is listed as the three key points of environmental protection in China this year.
Plastic is a kind of domestic garbage that is difficult to treat. When it is mixed into soil, it will affect the absorption of water and nutrients by crops, resulting in crop yield reduction. Landfill it, occupy land and degrade it for hundreds of years. A large number of scattered plastics are also easy to cause animal manslaughter. Elk in Nanyuan, Beijing died after eating plastic bags from nearby garbage dumps. Plastics are easy to agglomerate into bundles, and even block the water flow, leading to the failure of water conservancy facilities and urban facilities, leading to disasters.
The production and use of foamed tableware in China are huge, and the use of plastic bags for food packaging and shopping is also amazing. According to a rough estimate, there are about 8 million tons of white garbage in China this century. Plastic products are one of the most difficult parts of all domestic garbage, and have always been a worldwide problem. Generally speaking, garbage disposal can be reduced, recycled and harmless by sanitary landfill, high-temperature composting and incineration. However, the situation in China is not optimistic, and garbage collection and disposal is far from an orderly system. Take Beijing as an example, garbage collection has not been completed in bags, let alone classified collection.
Although incineration can destroy plastic bags, building a garbage incineration plant is 20 times the investment of a landfill of the same size. As for the method of producing organic oil by artificial degradation, high-purity plastic products are needed, and large-scale treatment is unrealistic. Therefore, sanitary landfill has become the main way to collect plastics at present. Beijing has built three sanitary landfills: Asuwei, Beishenshu and Anding. A thick impermeable layer is laid at the bottom of the landfill, which is continuously covered by soil with the accumulation of garbage, and then vegetation is regenerated to ensure that the garbage is in a closed space and will not pollute groundwater, soil and surrounding air. However, taking Anding landfill as an example, a piece of land of 300 mu is only enough for a Xuanwu district in Beijing 14 years.
* * * Not long ago, the practice of using non-degradable plastics was responded by some shopping malls. They tried to sell degradable garbage bags, but few buyers, because the price of this kind of garbage bag is above 1 yuan, and it can't bear a lot of weight. Wankelong advocates the use of cloth bags, and the effect is not satisfactory.
Treating both the symptoms and the root causes is the best way to solve the problem. Experts believe that on the one hand, it is necessary to deal with existing garbage in a timely and effective manner, and on the other hand, it is necessary to replace plastics with degradable and easily degradable products. 1998165438+1October, a disposable tableware made of straw was put on the fast food table of Beijing Parkson Shopping Center for the first time. This kind of tableware is not only safe and hygienic, but also can be used as fertilizer once put underground and fish feed when put into water. It will be abandoned on the side of the road and will be in blowing in the wind in a few days. On June 5438+0998+February 13, more than 100 enterprises displayed their tableware made of rice husk, pulp and starch. A biodegradable disposable snack box has been studied by more than 30 researchers in Beijing Yiqing Research Institute for nearly 3 years, and recently passed the test. The test confirmed that the lunch box was exposed to nature after use and turned into water and carbon dioxide within 40 days. This lunch box is made of starch (corn, tapioca starch), annual plant fiber powder and bio-waterproof glue, which are injected into a mold for heating and foaming. All kinds of new substitute products are in the initial stage, but they have not reached the level of mass production and promotion.
In addition; People's awareness of environmental protection is still relatively backward, which is actually an important factor hindering the control of white pollution. The first step to control white garbage is garbage sub-packaging, which is expected to be realized after most people's conscious awareness of environmental protection is established. Therefore, the most important thing to control white pollution is to raise everyone's awareness of environmental protection. Because it takes more than 100 years for white garbage to degrade naturally in nature, solving its pollution problem can really be called a century-old problem.
I learned from Suizhou that the local government not only effectively solved the "white pollution", but also dug up "gold mines" from these wastes.
In the Plastic Weaving Industrial Park in Huan Tan Town, Suizhou City, there are 23 enterprises engaged in the processing and granulation of waste plastics, the stretching and weaving of granular materials and the production of finished products. In the production workshop of the industrial park, you can see the whole process of the machine "eating white and producing gold": the waste plastic waste such as plastic film, woven bag, oil pot and plastic cup has become colorful plastic particles after crushing, cleaning, finishing rolling, coloring and processing. After painting, ......
What does white pollution mean that it is not easy to rot and is not degradable?
Almost, the white pollution advertised on trains in the past mostly refers to disposable lunch boxes and plastic belts, which can be decomposed under soil and natural conditions for more than 100 years.
Choose degradable garbage to reduce what pollution.
It should be white pollution.
Can white garbage (disposable plastic bags) in white pollution be recycled?
Some degradable materials can be recycled, but at present most of them are not, because there are harmful substances after combustion.
Can water sprite be degraded? Or turn into white garbage like plastic? It is said to be poisonous, and now it is 5 points.
This thing is water-absorbent resin, let's see what material it is. General diapers and sanitary napkins are also water-absorbent resins. According to the degradation performance, SAP can be divided into non-degradable (including polymer products such as sodium acrylate and methyl methacrylate) and degradable (including graft polymer products of natural polymers such as starch and cellulose).
White garbage pollution
White pollution is a unique environmental pollution in China. A large number of discarded plastic products can be seen everywhere in various public places. They come from nature and are made by human beings, but when they finally belong to nature, they are not easily absorbed by nature, thus affecting the ecological environment of nature. From the perspective of saving resources, plastic products should be recycled as much as possible, because the main source is exhausted oil resources, but the production cost of recycling at this stage is much higher than the direct production cost, which is difficult to do under the current market economy conditions. Facing the increasingly serious problem of white pollution, people hope to find a plastic substitute, which can replace the existing plastic properties without causing white pollution. Degradable plastics came into being. The characteristic of this new functional plastic is that after reaching a certain service life, its chemical structure will degrade obviously under certain environmental conditions, which is harmless or less harmful to the natural environment. For example, starch-filled plastics, first of all, the starch contained in it is rapidly decomposed by amylase secreted by microorganisms in the soil in a short time, which leads to the decline of the mechanical properties of the film. At the same time, the self-oxidant added in the formula reacts with the metal salt in the soil to generate peroxide, which breaks the chain of polyethylene and degrades it into small pieces that are easily swallowed by microorganisms, which are absorbed by the natural environment and play a role in improving the soil.
The earth is our home, and this home is surrounded by garbage. As the masters of the 2 1 century, we should not just worry and complain, but take action, green action. Garbage is not useless, nor is waste. It is technically not difficult to recycle garbage. What is difficult is that garbage is discarded casually and mixed and piled up into garbage; Therefore, as educated and civilized people in the new century, we should participate in the source classification activities of "Yi" garbage, contribute a little to purifying our living space, and offer a love.
Domestic garbage is a by-product of human life. With the rapid development of social economy and the high concentration of urban population, the output of domestic waste is increasing gradually. General domestic waste can be divided into five categories: waste paper, plastic, glass, metal and biological waste. The main hazards of garbage to human life and environment are:
First, it occupies too much land. Garbage piled up in the suburbs of the city occupies a lot of farmland. At present, the average annual output of garbage in Beijing is 440 kilograms per person, and the annual output of the whole city is about 4 million tons, which is equivalent to two semi-scenic mountains. There are more than 4,500 garbage dumps in Beijing, covering an area of 1 1,000 mu. Garbage also stays in nature for a long time: tobacco and wool products are 1-5 years; Orange peel for 2 years; Painted wooden board 13 years; Nylon fabric for 30-40 years; Leather for 50 years; 80- 100 cans; Plastics 100-200 years; Glass 1000. To this end, we should not only make less garbage, but also pay attention to the classification and recycling of garbage, so as to turn waste into treasure. Use less disposable chopsticks, cups, lunch boxes and other products, and use more reusable products to reduce the consumption of precious forest resources; Use less plastic bags and shopping bags to reduce the harm of "white pollution" in cities; Buy fluorine-free refrigerators, air conditioners and other environmental protection appliances to protect the atmospheric ozone layer; Use less high-concentration detergent and phosphorus-free washing powder to reduce water pollution.
Second, pollute the air. Garbage is a complex mixture. In the process of transportation and open-air stacking, the decomposition of organic matter produces stench, which releases a lot of pollutants such as ammonia and sulfide into the atmosphere, including 100 kinds of volatile organic gases, which contain many carcinogens and teratogens. Plastic film, paper scraps and dust fly with the wind, forming "white pollution".
Third, pollute the water source. Harmful components in garbage are easily washed into underground water by rainwater, and a large number of acidic and alkaline organic pollutants will be produced during garbage stacking or pit filling, and heavy metals in garbage will be dissolved. Leachate produced by garbage pollution sources will penetrate into groundwater through soil; If garbage is directly thrown into rivers, lakes or oceans, it will cause more serious pollution. You see: plastic bottles and lunch boxes floating on the sea surface of the Summer Palace and Beihai, plastic bags and bread paper hanging from the branches scattered on the forest mountain roads in Xiangshan and Badachu. Some tourists only care about their own convenience, causing environmental pollution. If animals eat white garbage by mistake, it will not only harm health, but even lead to death.
Fourth, soil and dregs. The application of garbage to farmland after direct or simple treatment will destroy the aggregate structure, physical and chemical properties and water and fertilizer conservation ability of soil. Especially plastic bags and sheets, if buried in farmland, the roots of crops will not grow, the farmland will reduce production, and the food available for people will decrease. ......
Why is white pollution so serious? 10.
White pollution is a disposable plastic packaging that is difficult to degrade. For example, disposable foamed tableware and plastic bags are commonly used. It seriously pollutes the environment, and it is difficult to decompose when buried in soil, which will lead to the decrease of soil capacity. If burned, it will lead to air pollution. So now it is recommended not to use it or use it less. It is best to bring your own tools to buy things and reduce its utilization rate.
First, the status quo and harm of "white pollution"
As a new type of material, plastic products have the advantages of light weight, waterproof, durability, mature production technology and low cost, and are widely used all over the world, with an increasing trend year by year. The growth rate of plastic packaging materials in the world market is higher than other packaging materials. The average annual growth rate of plastic packaging materials from 1990 to 1995 was 8.9%.
China is one of the top ten countries producing and consuming plastic products in the world. 195 China's plastic output was 5190,000 tons, and nearly 6 million tons of plastics came to Japan. In that year, the total consumption of plastics in China was about 1 1 10,000 tons, including 2 1 1 10,000 tons of packaging plastics. Most packaging plastics are discarded in the environment in the form of waste films, plastic bags and foamed plastic tableware. These waste plastic packages are scattered in urban areas, scenic tourist areas, water bodies and roads, which not only affect the landscape and cause "visual pollution", but also cause potential harm to the ecological environment because it is difficult to degrade.
According to the survey, 3% of Beijing's domestic garbage is packed in waste plastics, with an annual total of about 6,543,800 tons. 7% of Shanghai's domestic waste is packaged in waste plastics, with an annual total of about 6,543,800 tons. In Tianjin, the annual waste plastic packaging also exceeds 6,543,800 tons. Every year in Beijing, about 2.3 billion plastic bags, 220 million disposable plastic tableware and 6.75 million square meters of discarded agricultural films are discarded in the environment. People jokingly call it "suburban white."
The main hazards of "white pollution" are "visual pollution" and "potential hazards";
1, "visual pollution". Waste plastic packaging materials scattered in cities, tourist areas, water bodies and roads bring people bad vision, affect the overall aesthetic feeling of cities and scenic spots, and destroy the cityscape, thus causing "visual pollution".
2. "Potential danger". Waste plastic packaging is difficult to degrade after entering the environment, resulting in long-term and deep-seated ecological and environmental problems. First of all, the mixing of waste plastic packaging materials into soil will affect the absorption of nutrients and water by crops, leading to crop yield reduction; Second, waste plastic packaging on land or in water is swallowed by animals as food, which leads to animal death (such cases are common in zoos, pastoral areas and oceans); Thirdly, it is difficult to package and treat the waste plastics mixed with domestic garbage: landfill will occupy a lot of land for a long time, domestic garbage mixed with plastic is not suitable for composting, and it is difficult to recycle the classified waste plastics because it cannot guarantee the quality.
At present, people have a strong reaction to the problem of "visual pollution", but most people still lack understanding of the long-term and deep-seated "potential harm" of waste plastic packaging.
Two, the general practice of prevention and control of "white pollution" at home and abroad
1, prevention and control of "white pollution" abroad.
As early as 1985, the average consumption of plastic packaging in the United States reached 23.4 kg, that in Japan was 20. 1 kg and that in Europe was 15 kg. In 1990s, the per capita consumption of plastic packaging materials in developed countries was higher (the per capita consumption of plastic packaging materials and other plastic products in China was 13.5438+02kg). From the perspective of consumption, it seems that the "white pollution" in developed countries should be very serious, but it is not. The reasons are as follows: First, the city appearance management in developed countries has been strict for a long time, and few people casually throw away discarded plastic packaging materials, basically putting an end to "visual pollution". Second, the harmless treatment rate of domestic garbage in developed countries is high. Take the United States as an example Before 1980s, the main way to treat waste plastics was landfill. Later, it was found that plastics did not degrade for a long time. After the 1990s, they turned to recycling.
At present, a strict classification and recycling system has been established, most of the waste plastic packaging materials have been recycled, and a small part of them have been converted into energy or treated harmlessly in other ways, basically eliminating the potential harm of waste plastic packaging materials.
The United States has enacted the Law on Resource Protection and Recovery, which clearly stipulates the technical research, system construction, operation and development planning of solid waste management, resource recovery and resource protection. California, Maine, new york and other states 10 have successively introduced the deposit system for recycling packaging supplies. Japan's renewable resources law, energy protection and renewable resources support law, packaging capacity ......
Harm of white garbage
As a light, waterproof and corrosion-resistant new material, plastic products are widely used in the world.
Plastics were first used in agricultural plastic films, which brought great development to agricultural production, made crops grow in all seasons and promoted market consumption. According to market statistics, from 1990 to 1995, the output of plastics increased at an annual rate of 8.9%, which has swept the whole earth. It can be called the "white revolution". However, while it provides convenience for people, it also brings people a "white disaster".
Today, "white pollution" has become a well-known new term. Mainly refers to all kinds of foamed plastic bags, agricultural plastic films, etc. It has caused pollution to the environment and aroused widespread concern in society.
1994, Taiwan Province province of China issued a ban on "white products", which was cancelled one year later.
As early as 1995, Hangzhou issued a notice prohibiting the local use of disposable foamed plastic tableware.
1 June, 1997, Guangzhou issued the * * * order, stipulating that from September of that year, the production, sale and use of disposable non-degradable plastic lunch boxes were prohibited in the whole city.
Based on this, in June, 1999, 1999, the State Economic and Trade Commission issued Order No.6, making it clear that disposable foamed plastic tableware, as an outdated product, will be completely eliminated before the end of 2000, and the production, sale and use will be completely banned from 200/kloc-0.
It can be seen from the above materials that the deadline has passed more than one year, but disposable foamed tableware can still be seen everywhere, and * * * has also changed from "white ban" to "ambiguity" at that time, and it is often perfunctory, and "white ban" has become a dead letter.
In view of the above situation, we have carried out various investigations and studies, consulted various materials, obtained all aspects of various new substitutes developed and put on the market by the state so far, and analyzed and summarized them.
A difficult journey
? We went to Xigu District Environmental Protection Bureau and received a warm reception. During the conversation, we realized the true composition of "white pollution", got a preliminary understanding of the concept of "white pollution" and some understanding of the current methods to solve "white pollution" (prepared a question and answer record).
? We went to Xinhua Bookstore, provincial library and school stacks, but there was little information about "white pollution", only the components of polyethylene, polypropylene and polyvinyl chloride, which hindered the research process.
? In order to get rid of the predicament, we decided to use today's information technology-surfing the Internet. We found a vast space on the Internet, which gave us a deeper understanding of "white pollution". This is very helpful for us to write a paper.
? With the above foundation, we decided to further understand the "white pollution" in Lanzhou. We interviewed Hualian Supermarket, Electric Supermarket, and some retail stores and vendors. We are deeply shocked that so many plastic belts and foam lunch boxes are thrown away at will every day and year, and people turn a blind eye to all this. We think it is too difficult to solve the problem of "white pollution" without improving the quality of residents. (Questionnaire can be provided)
"White pollutants", with such a strong vitality, what kind of serious harm it will bring to our lives, we will describe it in the following content. First, let's learn about the composition of plastic.
I. Composition of "white pollutants"
"White pollution" mainly refers to white foamed plastic lunch boxes, various plastic bags, agricultural plastic films and other rings.
Environmental pollution. But "white pollution" is not what people usually think of as plastic products. As we all know, plastic is a new material with excellent comprehensive performance and a consumer product. Generally speaking, it is also a substance. Any substance has its life cycle, and the whole process of reaching the end of the life cycle is degradation. So the plastic itself is degradable. It is only because of the stabilization technology, that is, adding light and heat stabilizers and antioxidants to delay or inhibit its inherent biodegradability. And there are more than 300 kinds of plastics, and there are more than 40 kinds in common use, but only a small part of them can really become white pollution. So "white pollution" cannot be equated with plastic.
The main components of "white pollution" are polyethylene (PE), polyvinyl chloride (PV), polypropylene (PP),
Polystyrene resin (PS). Let's take a look at them one by one:
Polyethylene:
Polyethylene is a thermoplastic resin, which is formed by addition polymerization of ethylene. ......