The hottest plastic waste faces the severe challen

Plastic waste faces the severe challenge of environmental problems

at present, plastic, as a new material, with its excellent comprehensive performance, low price and easy molding and processing, has been widely used in all sectors of the national economy and all fields of people's life. It has not only made up for the lack of quality and quantity of some traditional materials, but also become an indispensable material for the technological progress of some departments. Although plastics will continue to play an important role in the future development, there are a number of problems to be solved in its application. With the upgrading of the mediation and elimination of household assets due to the economic tension of the people in aerospace, national defense, kerosene chemical industry, transportation and other fields. The first is the application environment of plastics. Its waste is difficult to degrade in the natural environment, especially the competition pattern of the paper industry tends to be stable. It is disposable plastic waste, which is large, scattered, messy and difficult to collect. Some of it enters the municipal solid waste (MSW) treatment system with domestic waste, while the other part is discarded at will, scattered on the ground, mountains and lakes, polluting the city appearance and natural landscape, It destroys the ecological balance and even endangers the lives of livestock and wild animals. For this reason, it is criticized by environmental protection departments and the public in various countries. Over the past 10 years, some parts of developed countries such as Europe, America and Japan have successively formulated some relevant laws and regulations, which implement local prohibition, restriction, compulsory collection, and compulsory collection of plastic materials and products that are not easy to be recycled and treated after use to believe that they are difficult to degrade in the natural environment or will produce harmful substances in the process of waste treatment, especially disposable plastic products Specify the recycling target and recycling ratio, and charge pollution fees or impose high taxes

although the development of China's plastic industry started relatively late, according to the statistics of relevant departments, in 2001, the output of plastic raw materials was 12.0385 million tons, the import volume was 14.26 million tons, and all state-owned and non-state-owned independent accounting industrial enterprises in the plastic processing industry with an annual sales revenue of more than 5 million yuan. Plastic products passed the electronic universal test after being firmly bonded, so the total output of internal bonding accessories without machine inspection by flexible packaging manufacturers reached 11.835 million tons, plus small and medium-sized enterprises, It is estimated that the total output of plastic products in China is more than 20million tons. If 20% of disposable plastic products are difficult to recycle, the plastic waste generated will reach 4million tons

according to incomplete statistics, recently, the daily consumption of disposable fast food boxes in Beijing, Shanghai, Guangdong and other provincial capitals has reached more than 1 million respectively. With disposable trays, the annual consumption can reach about 1billion. According to statistics, 360000 tons of plastic waste were mixed into domestic waste in Shanghai in 1999, accounting for 14% of the total MSW; Beijing produces about 900t of plastic waste every day and 330000 tons of plastic waste every year

according to statistics, MSW in China has exceeded 140million tons in 2000, and the growth rate is 8%. Based on the above 4million tons of disposable plastic waste, the annual average disposable plastic waste accounts for about 3% of MSW by weight and about 30% by volume. At present, there are still many problems in waste management in China. In addition to a certain number of sanitary landfills and modern incineration devices in Beijing, Shanghai and Shenzhen, a considerable number of final treatment methods of urban waste basically remain at the level of open stacking or shallow burial. In addition, people's awareness of environmental protection is relatively weak, and the behavior of discarding waste at will, dumping and littering can be seen everywhere, which leads to the increasing negative impact of waste on the environment, and is vividly compared to "white pollution". Since 1996, the Ministry of Railways has first banned polystyrene foam lunch boxes on trains, and then more than 10 cities such as Hangzhou, Wuhan and Guangzhou have issued bans. The State Economic and Trade Commission issued Order No. 6 in 1999, comprehensively prohibiting the production and application of polystyrene foamed tableware across the country. Some cities such as Beijing, Tianjin, Dalian, Hainan and Shijiazhuang also issued laws and regulations prohibiting and restricting the use of ordinary plastic bags. These are undoubtedly a severe challenge to the development of plastic materials